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Warning : Blast processing overdrive !! Whats better than 440 sprites in 440 colors on Sega Genesis (eg last sprite multiplex demo) ? 660 sprites in 660 colors !! Did away with interupts and now fully racing the beam, Atari 2600 mode basically ! 3 sprites re-positioned and colored... show more

Shannon Birt

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26,739 görüntüleme • 2 yıl önce •via X (Twitter)

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Andore profil fotoğrafı

Andore2 yıl önce

You are making history in the Mega Drive community, your studies are showing a capacity never used during the console's commercial era and that is fascinating! I can't wait for your game to be released 🙌🔥🔥

Shannon Birt profil fotoğrafı

Shannon Birt2 yıl önce

Thanks for the kind words 🙏 We will definitely push the limits in all regards and hopefully have our unique space in the busy Mega Drive shooter scene. We are working hard on the game and this demo may even feature in a cut scene yet.

CYBERDEOUS - Crouzet Laurent profil fotoğrafı

CYBERDEOUS - Crouzet Laurent2 yıl önce

So proud to work with you ! This is fantastic.

Shannon Birt profil fotoğrafı

Shannon Birt2 yıl önce

Likewise , next demo has to have Cyber tunes !!

Shane Lynch profil fotoğrafı

Shane Lynch2 yıl önce

Awesome! Any chance of sharing the ROM? I'd love to see it in person without Twitter's video doing its thing.

Proyecto Mega Drive profil fotoğrafı

Proyecto Mega Drive2 yıl önce

My jaw has dropped again, as it does with all the demonstrations you do. I think today I will eat liquid food until my jaw can close.

Shannon Birt profil fotoğrafı

Shannon Birt2 yıl önce

Thanks !! Glad I can help with the weight loss 😉

Based Nerd profil fotoğrafı

Based Nerd2 yıl önce

Nice, mastery of racing the beam did miracles on the #2600 #VCS. I can only imagine what could be achieved with other hardware.

Shannon Birt profil fotoğrafı

Shannon Birt2 yıl önce

Yes I thought old tricks could work well on Mega Drive, I was using interupts before but they are not cheap on the megadrive, so once I managed to splice the movement code into the multiplexer and color change I was able to just constantly race the beam then.

téo profil fotoğrafı

téo2 yıl önce

Plz upload uncompressed video id love to see this without Twitter destroying it

Shannon Birt profil fotoğrafı

Shannon Birt2 yıl önce

Good idea , I think I'll do a deep dive in YouTube like the 440 colors demo. My YouTube link is in my bio.

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Sega Genesis Blast Processing MAXED OUT ??? Whats better than 660 sprites in 660 colors (prev demo) ??? 1013 sprites in 1013 colors !!! Demo starts at 117 sprites then adds 20 sprites per second every second until it reaches Max Blast Processing at ~ 46 seconds mark. Live Sprite/Color Counter top left , updates periodically. Thanks to Carsten666 for amazing artwork and CYBERDEOUS - Crouzet Laurent for pumping audio (a Lufthoheit team collaboration) - appreciate your support guys !! Snippets: 18 Hardware sprites multiplexed 56x each (max level) = 1008 sprites + 5 player ships = 1013. 4-5 colors changed by DMA every scanline. Repositioning 4.5 sprites every scanline - this is VDP maximum level for X&Y (more sprites onscreen with color change is not possible unless I find a miracle). Ran out of total palette colors near mid screen, Shadow & Highlight mode enabled to shadow more colors from that point. Shown on Hardware MD 1 VA 6 + PVM. Coding was a REAL headache, it uses ~ 97% of the cpu/dma time and timing is very tight. Took 3 days alone just to get the music to play - PCM was taking up too much cpu (little cpu to spare). XGM2 sound driver helped & lowered cpu cost, thanks Stephane Sprites are moved independently at 18 different speeds and their distribution was tricky. Background Planes A & B used for spinning Galaxies. #SGDK #SegaGenesis

Sega Genesis Blast Processing MAXED OUT ??? Whats better than 660 sprites in 660 colors (prev demo) ??? 1013 sprites in 1013 colors !!! Demo starts at 117 sprites then adds 20 sprites per second every second until it reaches Max Blast Processing at ~ 46 seconds mark. Live Sprite/Color Counter top left , updates periodically. Thanks to Carsten666 for amazing artwork and CYBERDEOUS - Crouzet Laurent for pumping audio (a Lufthoheit team collaboration) - appreciate your support guys !! Snippets: 18 Hardware sprites multiplexed 56x each (max level) = 1008 sprites + 5 player ships = 1013. 4-5 colors changed by DMA every scanline. Repositioning 4.5 sprites every scanline - this is VDP maximum level for X&Y (more sprites onscreen with color change is not possible unless I find a miracle). Ran out of total palette colors near mid screen, Shadow & Highlight mode enabled to shadow more colors from that point. Shown on Hardware MD 1 VA 6 + PVM. Coding was a REAL headache, it uses ~ 97% of the cpu/dma time and timing is very tight. Took 3 days alone just to get the music to play - PCM was taking up too much cpu (little cpu to spare). XGM2 sound driver helped & lowered cpu cost, thanks Stephane Sprites are moved independently at 18 different speeds and their distribution was tricky. Background Planes A & B used for spinning Galaxies. #SGDK #SegaGenesis

Shannon Birt

106,428 görüntüleme • 2 yıl önce

** Sega Genesis 3D engine update 8.5 ** A smaller update - Scrolling left or right of the sprite based background is implemented along with X camera shifting of the 3d plane. The Exodus emulator has been used with sprite boxing enabled so you can see the background sprites making up the object ( their outlines ) and how they move to tilt the image . The background is made up of 112 sprites (51 are multiplexed in that number as the Genesis is limited to 80 without mulitplexing eg basically re-using sprite hardware as the screen is being drawn ) . In a 6 x 17 sprite grid of 16x32 pixel high sprites. If the tilt affect was not neccessary or only 1/2 the angle of tilt effect was needed, I could get away with 1/2 the number of sprites and just used 32x32 sprites instead. I think the tilt effect adds a bit to movement however. This is very similar to how a Neo Geo would build its backgrounds up - in 16 pixel strips however its sprites are tall as the screen or more but the concept of making backgrounds up in 16 pixel wide strips is similar. The NG uses sprites to build any background layers required. Here on the Genesis the reason is rendering is much faster using both the 3d planes and using a total sprite background for this engine. Initially i had a lot of things breaking when I tried to move the camera in the X dimension much , as i'd optimised the vertex transform path heavily and once beyond a certain camera offset the X value was wrapping around causing a lot of breakage in the rendering. Thankfully solved that issue without marginal impact to cpu . It still needs work , perspectives are a bit wrong etc but it won't be hard to fix. Also found some rendering speeds ups, about 8% by optimising fully onscreen quads and optimising the clearing of the frame buffers more efficiently. Toni Gálvez - Megastyle - BG. has been hard at work on HUD elements and more 3d models so will have something to show for that soon. #SGDK #SegaMegadrive #SegaGenesis

Sega Genesis 3D engine update 8.5 A smaller update - Scrolling left or right of the sprite based background is implemented along with X camera shifting of the 3d plane. The Exodus emulator has been used with sprite boxing enabled so you can see the background sprites making up the object ( their outlines ) and how they move to tilt the image . The background is made up of 112 sprites (51 are multiplexed in that number as the Genesis is limited to 80 without mulitplexing eg basically re-using sprite hardware as the screen is being drawn ) . In a 6 x 17 sprite grid of 16x32 pixel high sprites. If the tilt affect was not neccessary or only 1/2 the angle of tilt effect was needed, I could get away with 1/2 the number of sprites and just used 32x32 sprites instead. I think the tilt effect adds a bit to movement however. This is very similar to how a Neo Geo would build its backgrounds up - in 16 pixel strips however its sprites are tall as the screen or more but the concept of making backgrounds up in 16 pixel wide strips is similar. The NG uses sprites to build any background layers required. Here on the Genesis the reason is rendering is much faster using both the 3d planes and using a total sprite background for this engine. Initially i had a lot of things breaking when I tried to move the camera in the X dimension much , as i'd optimised the vertex transform path heavily and once beyond a certain camera offset the X value was wrapping around causing a lot of breakage in the rendering. Thankfully solved that issue without marginal impact to cpu . It still needs work , perspectives are a bit wrong etc but it won't be hard to fix. Also found some rendering speeds ups, about 8% by optimising fully onscreen quads and optimising the clearing of the frame buffers more efficiently. Toni Gálvez - Megastyle - BG. has been hard at work on HUD elements and more 3d models so will have something to show for that soon. #SGDK #SegaMegadrive #SegaGenesis

Shannon Birt

21,329 görüntüleme • 1 ay önce

** Parodius Update ** The team - Pyron , Vector Orbitex and I have all been flatout busy .. still we have had time to do some wee bits on Parodius for Sega Genesis. Since last update : More colors !! the background now uses Interupt trickery to have 19 colors so far (from 16) . Just got it working today as the lazer interupts colliding with the color change interupts had to be sorted out. So there are more 3 more blues shades in the background. You can see index 0 and index 11 in the CRAM viewer re-using color indexes on the RHS as the screen draws. Theres about 9 interupts driving lazers and background updates now, the cpu sorting / setup is costing about 8 %cpu but I'll live with it for now. Stage 1 track reworked by Vector, reduced vgm size to 101 KB ! ( xgm2 further reduces this to 53kb ) And it also includes the choirs, recreated in FM and PSG sound. He promises further enhancements to come too. Vic Viper Shot and Lazer SFX added , Speed-Up , Lazer Announcer speed samples added . I'm very happy with how the voices turned out in particular , Pyron has supplied modified samples to get better volume levels. Background collisions for the standard shot implemented , next I'll do the lazer . More of the vic viper power ups and Power up bar hud / animating water to add yet. #SGDK #Parodius #SegaMegadrive #SegaGenesis

Parodius Update The team - Pyron , Vector Orbitex and I have all been flatout busy .. still we have had time to do some wee bits on Parodius for Sega Genesis. Since last update : More colors !! the background now uses Interupt trickery to have 19 colors so far (from 16) . Just got it working today as the lazer interupts colliding with the color change interupts had to be sorted out. So there are more 3 more blues shades in the background. You can see index 0 and index 11 in the CRAM viewer re-using color indexes on the RHS as the screen draws. Theres about 9 interupts driving lazers and background updates now, the cpu sorting / setup is costing about 8 %cpu but I'll live with it for now. Stage 1 track reworked by Vector, reduced vgm size to 101 KB ! ( xgm2 further reduces this to 53kb ) And it also includes the choirs, recreated in FM and PSG sound. He promises further enhancements to come too. Vic Viper Shot and Lazer SFX added , Speed-Up , Lazer Announcer speed samples added . I'm very happy with how the voices turned out in particular , Pyron has supplied modified samples to get better volume levels. Background collisions for the standard shot implemented , next I'll do the lazer . More of the vic viper power ups and Power up bar hud / animating water to add yet. #SGDK #Parodius #SegaMegadrive #SegaGenesis

Shannon Birt

13,116 görüntüleme • 11 ay önce

*** SOTA RETROCON S.O.T.A UPDATE *** Whilst the Versao LTDA team is busy at Retrocon showing off our latest Sega Genesis SOTA update, here is a small snippet of how the game is progressing. This video has 3 parts, our menu screen, rain - wind sub section of level 1, then the boss. Everything is still wip including my gameplay skill lol ( and i thought the controller would help .. ) Some challenges overcome : The Menu screen uses shadow and highlight transparency modes in two ways, the background mode for the light rays and then the sprite mode for the mist - it has a nice overlapping effect too, due to using the forground plane for the light rays (s & h background mode) the entire forground is made up of sprites - all the words are sprites . SaviorMarks sent me a screenshot of an issue with boss leftover Mist sprites affecting the menu screen and I thought that looks really cool - lets do that haha . Sometimes bugs are keepers !! The rain section uses more than 80 sprites, a sprite multiplexor handles the rain whilst normal non plexed sprites make up the moon / clouds in the far background , the lamp posts and lamp light in the mid forground and Fences in the front forground . Without the multiplexor there was too much drop out on the rain at times. The rain is still blinked in alternating X positions due to the pixels per line limit , but it gives a great result still. The lamp lights use Shaded Active Dither as S&H here would not overlap the enemies / player . The Boss was a challenge with its size and full frame updates, up to 650 tiles are changed per animation frame into vram. Custom Dual priority DMA routines and extended DMA timings are used (still NTSC 224 pixels tall screen size but most of the vblank was used for updating tiles ) . These methods were used to update the bosses dual display buffers. I needed to have dual priority DMA buffers as the player / waterfall etc had to update their frames whilst the boss is constantly streaming tiles. There are also S&H transparent Mist sprites used for the boss sequence. It seems if you want everything to break at once target a demo for a retrocon event haha, we had lots of issues mainly with vram getting stomped and as all animating sprites need to be DMA streamed to fit into VRAM as the forgrounds and backgrounds take up a lot of tiles. Some new tools which show the VRAM allocation for the sprite engine on a frame by frame basis helped and a self defragging VRAM system helped quite a bit also. Thankfully things are in a good state now apart from a couple of small bugs that persist. Thanks to SaviorMarks and @MichelinFabio for putting up with and testing all the bugged updates haha !! #SegaGenesis #SGDK @MichelinFabio SaviorMarks #VersaoLTDA

* SOTA RETROCON S.O.T.A UPDATE * Whilst the Versao LTDA team is busy at Retrocon showing off our latest Sega Genesis SOTA update, here is a small snippet of how the game is progressing. This video has 3 parts, our menu screen, rain - wind sub section of level 1, then the boss. Everything is still wip including my gameplay skill lol ( and i thought the controller would help .. ) Some challenges overcome : The Menu screen uses shadow and highlight transparency modes in two ways, the background mode for the light rays and then the sprite mode for the mist - it has a nice overlapping effect too, due to using the forground plane for the light rays (s & h background mode) the entire forground is made up of sprites - all the words are sprites . SaviorMarks sent me a screenshot of an issue with boss leftover Mist sprites affecting the menu screen and I thought that looks really cool - lets do that haha . Sometimes bugs are keepers !! The rain section uses more than 80 sprites, a sprite multiplexor handles the rain whilst normal non plexed sprites make up the moon / clouds in the far background , the lamp posts and lamp light in the mid forground and Fences in the front forground . Without the multiplexor there was too much drop out on the rain at times. The rain is still blinked in alternating X positions due to the pixels per line limit , but it gives a great result still. The lamp lights use Shaded Active Dither as S&H here would not overlap the enemies / player . The Boss was a challenge with its size and full frame updates, up to 650 tiles are changed per animation frame into vram. Custom Dual priority DMA routines and extended DMA timings are used (still NTSC 224 pixels tall screen size but most of the vblank was used for updating tiles ) . These methods were used to update the bosses dual display buffers. I needed to have dual priority DMA buffers as the player / waterfall etc had to update their frames whilst the boss is constantly streaming tiles. There are also S&H transparent Mist sprites used for the boss sequence. It seems if you want everything to break at once target a demo for a retrocon event haha, we had lots of issues mainly with vram getting stomped and as all animating sprites need to be DMA streamed to fit into VRAM as the forgrounds and backgrounds take up a lot of tiles. Some new tools which show the VRAM allocation for the sprite engine on a frame by frame basis helped and a self defragging VRAM system helped quite a bit also. Thankfully things are in a good state now apart from a couple of small bugs that persist. Thanks to SaviorMarks and @MichelinFabio for putting up with and testing all the bugged updates haha !! #SegaGenesis #SGDK @MichelinFabio SaviorMarks #VersaoLTDA

Shannon Birt

10,319 görüntüleme • 1 yıl önce

*** Mega Parodius Sega Megadrive Update *** Lately I've been having some fun seeing how far we can push the Parodius game engine . This is not arcade accurate - just for testing, decreased bullet timers and upped the bullet count to see what would happen re cpu usage when things are made a lot busier ! Maybe something like this could be insane mode in the options etc. Since last update we are a lot more optimised under the hood . The C based sprite engine, particularly visibility checking was speedup , overall 25 % faster. Then re-wrote the sprite engine completely in 68k assembly , 30% faster again. It took about 3 days and 1500 lines of assembly , thankfully the gains were worth it. All these gains will be back ported to S.O.T.A also as its using the same sprite engine. Usage is around 19% of cpu per frame with a full sprite load - 33 % cpu left in the busiest frame currently . Parodius is using a write the sprite list every frame type engine , so priority and meta-sprite objects can be handled with ease albiet its still a bit slower than static allocation sprite engines such as the one in lufthoheit but this is a bit easier to code for in the long run. All collision checks are been done , we are using a spatial grid system to get the collision checks done faster than a brute force approach . To get to maximum sprite count destruction is disabled in the video. We hit 80 sprites onscreen in this sequence , the sprite counter is one the Left side. We use about 16 sprites in the top hud and water line , about 21 for player attacks / missiles / shots / options . Up to 35 bullets + enemies . No lazer usage here as the Lazers use zero sprites thanks to the raster tricks , this video is all about the sprites ! Improved the water line when the Catboss is active , as he is Sprites + Forground we are doing some tile rotation tricks eg bit scrolling to give the impression of parrallax at that point . Vector Orbitex has updated the stage 1 music again and has made things even higher quality , hes mixed pcm and fm channels together to create higher quality orchestral hits for example . Pyron has started converting assets from stage 2/3 , some amazing work there . Hes well ahead of me at present which is a good thing. Still lots of incomplete animations missing logic etc , its slow going with RL getting in the way haha and 2 other projects !! Still its fun !! #SGDK #SegaMegadrive #SegaGenesis #Parodius

* Mega Parodius Sega Megadrive Update * Lately I've been having some fun seeing how far we can push the Parodius game engine . This is not arcade accurate - just for testing, decreased bullet timers and upped the bullet count to see what would happen re cpu usage when things are made a lot busier ! Maybe something like this could be insane mode in the options etc. Since last update we are a lot more optimised under the hood . The C based sprite engine, particularly visibility checking was speedup , overall 25 % faster. Then re-wrote the sprite engine completely in 68k assembly , 30% faster again. It took about 3 days and 1500 lines of assembly , thankfully the gains were worth it. All these gains will be back ported to S.O.T.A also as its using the same sprite engine. Usage is around 19% of cpu per frame with a full sprite load - 33 % cpu left in the busiest frame currently . Parodius is using a write the sprite list every frame type engine , so priority and meta-sprite objects can be handled with ease albiet its still a bit slower than static allocation sprite engines such as the one in lufthoheit but this is a bit easier to code for in the long run. All collision checks are been done , we are using a spatial grid system to get the collision checks done faster than a brute force approach . To get to maximum sprite count destruction is disabled in the video. We hit 80 sprites onscreen in this sequence , the sprite counter is one the Left side. We use about 16 sprites in the top hud and water line , about 21 for player attacks / missiles / shots / options . Up to 35 bullets + enemies . No lazer usage here as the Lazers use zero sprites thanks to the raster tricks , this video is all about the sprites ! Improved the water line when the Catboss is active , as he is Sprites + Forground we are doing some tile rotation tricks eg bit scrolling to give the impression of parrallax at that point . Vector Orbitex has updated the stage 1 music again and has made things even higher quality , hes mixed pcm and fm channels together to create higher quality orchestral hits for example . Pyron has started converting assets from stage 2/3 , some amazing work there . Hes well ahead of me at present which is a good thing. Still lots of incomplete animations missing logic etc , its slow going with RL getting in the way haha and 2 other projects !! Still its fun !! #SGDK #SegaMegadrive #SegaGenesis #Parodius

Shannon Birt

16,084 görüntüleme • 8 ay önce

** SEGA GENESIS - LUFTHOHEIT - Tunnel Stage Preview ** We are pleased to show an early preview of part of our Tunnel/ Vortex Stage. Big shout out to Carsten666 for his gorgeous Graphics, CYBERDEOUS - Crouzet Laurent for the amazingly well matched Audio to this level, Stephane for creating SGDK in the first place and being very supportive with new features in SGDK also. Technically this stage was a bit of a challenge, some notes below re this. To drive the rolling texture of the background - 40 horizontal interrupts are used, executing 120 scanlines of color change, changing 5 colors per line = 600 color changes per frame. Variable spaced interrupts are used for expansion / compression effect. Four stages of brightness used for every texture / pattern , darkest in the center of screen , brightest top & bottom. New colors created by alternating two similar colors at 60 hz, for seams between brightness regions to increase the blending between regions. Co-operative Multi-threading system used to reclaim huge amounts of CPU within the color change interrupts. For example all rolling Cannon & Cannon bullets and Debris are moved using this technique - up to 25% of total CPU can be reclaimed ( its normally wasted polling for rhs/hblank ). Heatseeking missiles, these need trajectory's recalculated frequently and doing that at speed can be tricky - lots of missiles launched at Mid video and its the heaviest CPU load in the demo ( these are not using the Multi-threading technique yet ). Variable rate collision checking, as bullets gets very close to player the checking is done at 60 fps, as they get further away the checking drops off rapidly - this saves cpu. Runs 60 FPS at all times, works on real HW also but captured on emulator as my phone doesnt take 60hz video without getting out of sync. Intro & Foreground effects are coming, currently no foreground is present as its not quite baked enough yet, we have some cool things we will do with the extra plane yet. Lots of good stuff to come !! #SGDK #SegaGenesis #SegaMegadrive

SEGA GENESIS - LUFTHOHEIT - Tunnel Stage Preview We are pleased to show an early preview of part of our Tunnel/ Vortex Stage. Big shout out to Carsten666 for his gorgeous Graphics, CYBERDEOUS - Crouzet Laurent for the amazingly well matched Audio to this level, Stephane for creating SGDK in the first place and being very supportive with new features in SGDK also. Technically this stage was a bit of a challenge, some notes below re this. To drive the rolling texture of the background - 40 horizontal interrupts are used, executing 120 scanlines of color change, changing 5 colors per line = 600 color changes per frame. Variable spaced interrupts are used for expansion / compression effect. Four stages of brightness used for every texture / pattern , darkest in the center of screen , brightest top & bottom. New colors created by alternating two similar colors at 60 hz, for seams between brightness regions to increase the blending between regions. Co-operative Multi-threading system used to reclaim huge amounts of CPU within the color change interrupts. For example all rolling Cannon & Cannon bullets and Debris are moved using this technique - up to 25% of total CPU can be reclaimed ( its normally wasted polling for rhs/hblank ). Heatseeking missiles, these need trajectory's recalculated frequently and doing that at speed can be tricky - lots of missiles launched at Mid video and its the heaviest CPU load in the demo ( these are not using the Multi-threading technique yet ). Variable rate collision checking, as bullets gets very close to player the checking is done at 60 fps, as they get further away the checking drops off rapidly - this saves cpu. Runs 60 FPS at all times, works on real HW also but captured on emulator as my phone doesnt take 60hz video without getting out of sync. Intro & Foreground effects are coming, currently no foreground is present as its not quite baked enough yet, we have some cool things we will do with the extra plane yet. Lots of good stuff to come !! #SGDK #SegaGenesis #SegaMegadrive

Shannon Birt

23,873 görüntüleme • 1 yıl önce

** SEGA GENESIS / MEGADRIVE Software Scaling + Rotation *** Sega Megadrive can't scale backgrounds and rotate sprites in software at the same time ?? - hold my beer !! After Scaling I've been tinkering with Rotating sprites in software and I think it looks pretty sweet ! In the video 4 * 32x32 sprites are rotated through 64 steps at 30 FPS in software, it could be 60 FPS and more rotating objects if we were not doing the scaling at the same time but even blast processing has its limits ;-) Rotation at 30 FPS is far smoother than you typcially see in even in pre-rendered rotations anyhow ( a 64 frame 32x32 rotation is 32kb - not small ). Challenges were make it fast : very fast as this needs to work at pixel level, not double pixel like scaling. The megadrives packed pixel format (2 pixels per byte) makes that a little bit tricky . When I started the algorithm was 3x slower than now. Make it sensible : has to be usable in game , had to present a rom size reduction over pre-rendered animation. Make it flexible : so we can rotate frames in the background using up idle cycles (end of frame) and store those frames to vram for very heavy cpu scenes, so we can still have very smooth rotation with very heavy cpu demands still. Thanks to my team Carsten666 for the GFX and CYBERDEOUS - Crouzet Laurent for the marvelous tune. #SegaGenesis #SegaMegadrive #SGDK

SEGA GENESIS / MEGADRIVE Software Scaling + Rotation * Sega Megadrive can't scale backgrounds and rotate sprites in software at the same time ?? - hold my beer !! After Scaling I've been tinkering with Rotating sprites in software and I think it looks pretty sweet ! In the video 4 * 32x32 sprites are rotated through 64 steps at 30 FPS in software, it could be 60 FPS and more rotating objects if we were not doing the scaling at the same time but even blast processing has its limits ;-) Rotation at 30 FPS is far smoother than you typcially see in even in pre-rendered rotations anyhow ( a 64 frame 32x32 rotation is 32kb - not small ). Challenges were make it fast : very fast as this needs to work at pixel level, not double pixel like scaling. The megadrives packed pixel format (2 pixels per byte) makes that a little bit tricky . When I started the algorithm was 3x slower than now. Make it sensible : has to be usable in game , had to present a rom size reduction over pre-rendered animation. Make it flexible : so we can rotate frames in the background using up idle cycles (end of frame) and store those frames to vram for very heavy cpu scenes, so we can still have very smooth rotation with very heavy cpu demands still. Thanks to my team Carsten666 for the GFX and CYBERDEOUS - Crouzet Laurent for the marvelous tune. #SegaGenesis #SegaMegadrive #SGDK

Shannon Birt

19,405 görüntüleme • 1 yıl önce

** Sega Genesis 3D engine Day 2 ** Added solid filled triangles. Added colors ( full 15 color buffer ) . All code in C so far apart form the buffer clear and DMA buffer sending so should be some good speedups to come yet once line / triangle routines are ported to 68k Assembly. I've done basic filling optimisations in C such as where we can write longs eg fill 8 pixels at once for interior parts of the triangle the function will utilise that. Still using 3 divisions per triangle setup , I think i will see if I can use a cheaper reciprical multiplication instead. All rotations vertices are calculated live , in 2d space at present. #SGDK #SegaGenesis #SegaMegadrive

Sega Genesis 3D engine Day 2 Added solid filled triangles. Added colors ( full 15 color buffer ) . All code in C so far apart form the buffer clear and DMA buffer sending so should be some good speedups to come yet once line / triangle routines are ported to 68k Assembly. I've done basic filling optimisations in C such as where we can write longs eg fill 8 pixels at once for interior parts of the triangle the function will utilise that. Still using 3 divisions per triangle setup , I think i will see if I can use a cheaper reciprical multiplication instead. All rotations vertices are calculated live , in 2d space at present. #SGDK #SegaGenesis #SegaMegadrive

Shannon Birt

17,618 görüntüleme • 4 ay önce

*** SEGA GENESIS/MEGADRIVE - SCALING PART 2 *** Whats better on a Friday than seeing some scaling effects on the Megadrive ? .. nothing, so read on ... In the previous part we were software scaling in either axis by a given factor, but I couldn't change the scale factor per scanline on the same frame, so I couldn't skew the base image for tilting into screen eg Mode 7 type effects. - One issue was it was scaling column by column which got wrecked for performance trying per scanline adjustments. So I converted to a row scaler rather than column, this allowed expansions and contractions on a per scanline basis. - Speed up the code significantly , now running a sprite load + music + scaling on cpu with ~50% cpu free. Relied heavily on Python scripts I wrote to generate the 68k assembly for this as it was mind numbing labourious. In doing so I got the scripts competing with each other to come up with the fastest method for each scale , I'm starting to like python ;-) - Tried all sorts to speed up the horizontal interupt - handles vertical scaling, exotic methods eg unsafe interupts / racing the beam & updating the vertical scroll every X cpu cycles, in the end the Z80 cpu (audio) stealing the 68k cpu bus intermittendly just killed these ideas as it would only be 95% stable, ended up just doing smarter interupts that saved a lot of cpu instead. - The good and the bad, spent too long on this is the bad, the good is we will need it in Lufthoheit in a few places to make up for that !! Carsten666 CYBERDEOUS - Crouzet Laurent #SGDK #SegaMegadrive #SegaGenesis

* SEGA GENESIS/MEGADRIVE - SCALING PART 2 * Whats better on a Friday than seeing some scaling effects on the Megadrive ? .. nothing, so read on ... In the previous part we were software scaling in either axis by a given factor, but I couldn't change the scale factor per scanline on the same frame, so I couldn't skew the base image for tilting into screen eg Mode 7 type effects. - One issue was it was scaling column by column which got wrecked for performance trying per scanline adjustments. So I converted to a row scaler rather than column, this allowed expansions and contractions on a per scanline basis. - Speed up the code significantly , now running a sprite load + music + scaling on cpu with ~50% cpu free. Relied heavily on Python scripts I wrote to generate the 68k assembly for this as it was mind numbing labourious. In doing so I got the scripts competing with each other to come up with the fastest method for each scale , I'm starting to like python ;-) - Tried all sorts to speed up the horizontal interupt - handles vertical scaling, exotic methods eg unsafe interupts / racing the beam & updating the vertical scroll every X cpu cycles, in the end the Z80 cpu (audio) stealing the 68k cpu bus intermittendly just killed these ideas as it would only be 95% stable, ended up just doing smarter interupts that saved a lot of cpu instead. - The good and the bad, spent too long on this is the bad, the good is we will need it in Lufthoheit in a few places to make up for that !! Carsten666 CYBERDEOUS - Crouzet Laurent #SGDK #SegaMegadrive #SegaGenesis

Shannon Birt

11,070 görüntüleme • 1 yıl önce

** Mega Parodius Update ** The team have been busy over last couple of weeks , implementing more of the games engine. WIP since last update : White Bell power up ( this is the text attack ) Blue Bell power up ( full screen explosion ) Catboss & animating Trees Updated Lazers to work on the BGB layer ( Plane A updated to 64x64 tilemap ) . Pyron has been doing excellent work on Blue bell Explosion, Whitebell power up text gfx - the slogans are great !! Arcade quality tree animations have been added. Feeding me a lot of videos so we can replicate the arcade port more accurately. Vector Orbitex has updated the music to mark IV for stage 1 making it smaller yet again , he's also added the Orchestra Hit in , potentially more samples can be added back in now also as the song now is a miniscule 57 kb. I keep telling him its 2025 - not 1990 for rom sizes haha , a professional is always a professional though !! The Blue Bell power up uses the static large sprite class I made for SOTA where it supports unlimited amount of sprites per object and detects all the reverses / flips & uses the same tile pointers where it can and crunches it down into single sprite object. We use up to 40 sprites in the Explosion but only 147 tiles needed in vram thanks to clever use of mirroring. The Catboss is easily the hardest enemy in the level for a few reasons - we also had to free up Plane A so the boss could shift upwards onscreen, so lazer effects were shifted to Plane B. The bit that caused me the most issues was when he sits in the water line between the two islands. He is quite wide and also has overlapping palettes and animating parts , to do it solely with sprites would have lead to severe dropout at times. At the waterline we have to simulate 3 background planes and sprites at that point and we only have 2 background planes. Luckily the MD sprite engine is very flexible and we were able to recreate the arcade look at this point with some sprite trickery, the water-line is now sprites . So we use Plane A + sprites to recreate him and use a lot of plane animation to reduce the amount of sprites needed. For example the face, the tail the propeller are all plane A animations . I analysed the SNES/PCE versions and we use less sprites than those versions for him so that will help reduce the chance of sprite dropout when attacking. The Catboss is only about 1/2 done , all damage states, the onboard penguin factory, bullets from Cannons yet to added etc. He wraps around at the end of the vid as theres no destruction routine in for him yet . No extra enemies in at this stage , tackling the hard parts first etc. We took the arcade GFX for the Trees that sway around under the Catboss, all the animations are in. There were some DMA bandwidth issues originally I had to sort out as the Catboss has several animating parts + swaying Trees was leading to overload so after some load balancing it all is playing nicely !! We still have loads of stuff to add , collisions are not in - normal enemy waves etc but yeah a lot of future issues were sorting out just getting this far. So the team is very happy with the progress !! #SGDK #Parodius #SegaGenesis #SegaMegadrive #indiegame

Mega Parodius Update The team have been busy over last couple of weeks , implementing more of the games engine. WIP since last update : White Bell power up ( this is the text attack ) Blue Bell power up ( full screen explosion ) Catboss & animating Trees Updated Lazers to work on the BGB layer ( Plane A updated to 64x64 tilemap ) . Pyron has been doing excellent work on Blue bell Explosion, Whitebell power up text gfx - the slogans are great !! Arcade quality tree animations have been added. Feeding me a lot of videos so we can replicate the arcade port more accurately. Vector Orbitex has updated the music to mark IV for stage 1 making it smaller yet again , he's also added the Orchestra Hit in , potentially more samples can be added back in now also as the song now is a miniscule 57 kb. I keep telling him its 2025 - not 1990 for rom sizes haha , a professional is always a professional though !! The Blue Bell power up uses the static large sprite class I made for SOTA where it supports unlimited amount of sprites per object and detects all the reverses / flips & uses the same tile pointers where it can and crunches it down into single sprite object. We use up to 40 sprites in the Explosion but only 147 tiles needed in vram thanks to clever use of mirroring. The Catboss is easily the hardest enemy in the level for a few reasons - we also had to free up Plane A so the boss could shift upwards onscreen, so lazer effects were shifted to Plane B. The bit that caused me the most issues was when he sits in the water line between the two islands. He is quite wide and also has overlapping palettes and animating parts , to do it solely with sprites would have lead to severe dropout at times. At the waterline we have to simulate 3 background planes and sprites at that point and we only have 2 background planes. Luckily the MD sprite engine is very flexible and we were able to recreate the arcade look at this point with some sprite trickery, the water-line is now sprites . So we use Plane A + sprites to recreate him and use a lot of plane animation to reduce the amount of sprites needed. For example the face, the tail the propeller are all plane A animations . I analysed the SNES/PCE versions and we use less sprites than those versions for him so that will help reduce the chance of sprite dropout when attacking. The Catboss is only about 1/2 done , all damage states, the onboard penguin factory, bullets from Cannons yet to added etc. He wraps around at the end of the vid as theres no destruction routine in for him yet . No extra enemies in at this stage , tackling the hard parts first etc. We took the arcade GFX for the Trees that sway around under the Catboss, all the animations are in. There were some DMA bandwidth issues originally I had to sort out as the Catboss has several animating parts + swaying Trees was leading to overload so after some load balancing it all is playing nicely !! We still have loads of stuff to add , collisions are not in - normal enemy waves etc but yeah a lot of future issues were sorting out just getting this far. So the team is very happy with the progress !! #SGDK #Parodius #SegaGenesis #SegaMegadrive #indiegame

Shannon Birt

19,640 görüntüleme • 10 ay önce

*** Parodius Update - LAZERS !! *** How many sprites do we have to use on the Sega Genesis to make 4 x 160 pixel wide lazers ?? 10 ? 20 ? ZERO !! Which is really great as when the options overlap all with Lazers using sprites would have lead to sprite severe overload / dropout otherwise. So yes we have some raster trickery going on . I think this might take the cake for the most exotic effect Ive added just for a power up type haha. Breaking down the effect. 1.) Lazer tile rows ( the tile rows the lazers are currently on ) are copied to an offscreen area of the plane . I used the DMA VRAM to VRAM copy mode for this. You can see these offscreen rows just above the Game Videos window in the Plane A tilemap view. 2.) Then a solid block of Lazer colored tiles is drawn at the position of the Lazer horizontally in the offscreen buffer we just copied too - these are 8x8 tiles. 3.) Then onscreen when as the display is being drawn we change to the Lazers row at the correct pixel line offset for exactly 1 scanline then change back to the normal screens next row. I'm using the Horizontal interupt system developed in SOTA for handling the interupts for this. The technique used has been done before on the NES ( Salamander tech demo ) , as usual some of the best techniques come from the 8 bit systems , still it presented challenges getting it working on the MD. These irregular spaced interupts on the Genesis are a little bit of a problem too . All the height sorting has to be done on the frame before. Whats very interesting about the VRAM to VRAM copy DMA (Copy DMA) is it runs asynchronous to the CPU. Normally ROM/RAM to VRAM write DMA (Write DMA) halts the CPU during the send operation but with a Copy DMA I can pipeline one Copy DMA setup while the previous one is copying still . So even though the Copy DMA is 1/2 the speed of a Write DMA with the pipelining and no stalling its probably on par or better in some cases , where a copy makes sense to use. Theres still need some fine tuning , might make smaller lazers with more breaks etc. The Lazers can be full screen width , or narrow as we want so bit of fine tuning here to come. Pyron Vector Orbitex #Parodius #SegaMegadrive #SegaGenesis #SGDK

* Parodius Update - LAZERS !! * How many sprites do we have to use on the Sega Genesis to make 4 x 160 pixel wide lazers ?? 10 ? 20 ? ZERO !! Which is really great as when the options overlap all with Lazers using sprites would have lead to sprite severe overload / dropout otherwise. So yes we have some raster trickery going on . I think this might take the cake for the most exotic effect Ive added just for a power up type haha. Breaking down the effect. 1.) Lazer tile rows ( the tile rows the lazers are currently on ) are copied to an offscreen area of the plane . I used the DMA VRAM to VRAM copy mode for this. You can see these offscreen rows just above the Game Videos window in the Plane A tilemap view. 2.) Then a solid block of Lazer colored tiles is drawn at the position of the Lazer horizontally in the offscreen buffer we just copied too - these are 8x8 tiles. 3.) Then onscreen when as the display is being drawn we change to the Lazers row at the correct pixel line offset for exactly 1 scanline then change back to the normal screens next row. I'm using the Horizontal interupt system developed in SOTA for handling the interupts for this. The technique used has been done before on the NES ( Salamander tech demo ) , as usual some of the best techniques come from the 8 bit systems , still it presented challenges getting it working on the MD. These irregular spaced interupts on the Genesis are a little bit of a problem too . All the height sorting has to be done on the frame before. Whats very interesting about the VRAM to VRAM copy DMA (Copy DMA) is it runs asynchronous to the CPU. Normally ROM/RAM to VRAM write DMA (Write DMA) halts the CPU during the send operation but with a Copy DMA I can pipeline one Copy DMA setup while the previous one is copying still . So even though the Copy DMA is 1/2 the speed of a Write DMA with the pipelining and no stalling its probably on par or better in some cases , where a copy makes sense to use. Theres still need some fine tuning , might make smaller lazers with more breaks etc. The Lazers can be full screen width , or narrow as we want so bit of fine tuning here to come. Pyron Vector Orbitex #Parodius #SegaMegadrive #SegaGenesis #SGDK

Shannon Birt

16,162 görüntüleme • 1 yıl önce

** Sega Genesis - Mega Parodius Update ** Unfortunately introducing the Warmup pre-amble ( start of the level which starts in space ) into stage 1 really broke things for a while. I've taken the approach that its bascially two stages that are seamed together Warmup + general level and they both use different scrolling techniques / palettes / horizontal interupt (h-int) effects and need to change mid level without issue . Coinciding with that jumping into other coding rabbit holes then coming back rusty into something quite broken wasn't great either . The context change in my head took a while but got there in the end haha. The team have been busy also, Pyron has been busy working on latter level GFX which he has a substantial amount of the game converted now . He's done a great job on the stars and warmup enemies also ! Vector Orbitex is also far ahead of me with some latter level music already completed. Every time a revised song is smaller / better - Mega Parodius will be banging I can assure you. Technical bits added to the engine to support the warm-up stage : A 168 sprite multiplexor ( 96 sprite stars made up of 8 sprites re-used 12 times + 72 general purpose sprites ) implemented for the warm up stage. We wanted a substantial visual upgrade to the warmup level as its very plain on the arcade and this is Mega Parodius afterall so one way to get a lot of depth is to use multiplexed stars that all move at different speeds ( 96 different speeds ) . I have dabled with starfields before on the MD in a small way ;-) so this was second nature. The forground is a starfield itself of smaller stars that a line scrolled ( 32 different speeds ) to give more parallax effect. The line scrolling is changed to tile scrolling later for the main level part. The background is not used for the warmup as its pre-loaded with bits of the catboss and background for when the main level starts. The syringes were quite difficult to get right, basically they are homing missiles so they detect position to player and rotate accordingly however they all squirt which is another sprite attached with offsets that needs animating. Tedious is the word. Still to add red syringes and mulicolored enemies firing back . Had issues with the fading out of warmup / fading in of general level as mulitplexor ( star sprites ) needs disabling - fade out / fade in of Backgrounds to occur then color h-ints enabled at the end of the fade to get more colors onscreen. This sort of stuff needs to be timed well and is generally a little painfull to get right. I don't try to destroy all enemies in the vid to show load testing . Performance is strong as the engine is heavily written in 68k assembly with only the level sheduler in C. I think i will be glad to see the end of the Warmup part of the stage, luckily this can be re-used largely for other stages !! #SGDK #Parodius #SegaMegadrive #SegaGenesis

Sega Genesis - Mega Parodius Update Unfortunately introducing the Warmup pre-amble ( start of the level which starts in space ) into stage 1 really broke things for a while. I've taken the approach that its bascially two stages that are seamed together Warmup + general level and they both use different scrolling techniques / palettes / horizontal interupt (h-int) effects and need to change mid level without issue . Coinciding with that jumping into other coding rabbit holes then coming back rusty into something quite broken wasn't great either . The context change in my head took a while but got there in the end haha. The team have been busy also, Pyron has been busy working on latter level GFX which he has a substantial amount of the game converted now . He's done a great job on the stars and warmup enemies also ! Vector Orbitex is also far ahead of me with some latter level music already completed. Every time a revised song is smaller / better - Mega Parodius will be banging I can assure you. Technical bits added to the engine to support the warm-up stage : A 168 sprite multiplexor ( 96 sprite stars made up of 8 sprites re-used 12 times + 72 general purpose sprites ) implemented for the warm up stage. We wanted a substantial visual upgrade to the warmup level as its very plain on the arcade and this is Mega Parodius afterall so one way to get a lot of depth is to use multiplexed stars that all move at different speeds ( 96 different speeds ) . I have dabled with starfields before on the MD in a small way ;-) so this was second nature. The forground is a starfield itself of smaller stars that a line scrolled ( 32 different speeds ) to give more parallax effect. The line scrolling is changed to tile scrolling later for the main level part. The background is not used for the warmup as its pre-loaded with bits of the catboss and background for when the main level starts. The syringes were quite difficult to get right, basically they are homing missiles so they detect position to player and rotate accordingly however they all squirt which is another sprite attached with offsets that needs animating. Tedious is the word. Still to add red syringes and mulicolored enemies firing back . Had issues with the fading out of warmup / fading in of general level as mulitplexor ( star sprites ) needs disabling - fade out / fade in of Backgrounds to occur then color h-ints enabled at the end of the fade to get more colors onscreen. This sort of stuff needs to be timed well and is generally a little painfull to get right. I don't try to destroy all enemies in the vid to show load testing . Performance is strong as the engine is heavily written in 68k assembly with only the level sheduler in C. I think i will be glad to see the end of the Warmup part of the stage, luckily this can be re-used largely for other stages !! #SGDK #Parodius #SegaMegadrive #SegaGenesis

Shannon Birt

26,863 görüntüleme • 27 gün önce

** Sega Genesis 3D engine Update 5 ** Added support for Quads - quads are faster than triangles for drawing 4 sided objects ( vs 2 triangles ) as theres larger filling runs before edges. Made multiple enhancements to Triangle and Quad drawing for speed. 27% faster than last Video for triangle drawing. Changed back to Non linear frame buffer + DMA for speed of frame buffer (fb) transfer. The two buffer systems ( Linear FB + CPU blit Vs Non Linear FB + DMA transfer ) I have competing and porting optimisations back to either for the meantime. Triangle drawing vertex calculation done in Assembly . Triangle and Quad functions now loop in Assembly saving stack calls from C. Next tasks, H40 mode for Faster DMA with centered screen , more optimisations in setup , more optimisations in cullling and more detail in general. #SGDK #SegaGenesis #SegaMegadrive

Sega Genesis 3D engine Update 5 Added support for Quads - quads are faster than triangles for drawing 4 sided objects ( vs 2 triangles ) as theres larger filling runs before edges. Made multiple enhancements to Triangle and Quad drawing for speed. 27% faster than last Video for triangle drawing. Changed back to Non linear frame buffer + DMA for speed of frame buffer (fb) transfer. The two buffer systems ( Linear FB + CPU blit Vs Non Linear FB + DMA transfer ) I have competing and porting optimisations back to either for the meantime. Triangle drawing vertex calculation done in Assembly . Triangle and Quad functions now loop in Assembly saving stack calls from C. Next tasks, H40 mode for Faster DMA with centered screen , more optimisations in setup , more optimisations in cullling and more detail in general. #SGDK #SegaGenesis #SegaMegadrive

Shannon Birt

17,150 görüntüleme • 4 ay önce

"Create a video project announcing Agent Skills, following Cursor brand rules. 1920×1080, 60fps. Typewriter text effect at about 1 character per frame, then hold for 3 seconds after typing on every title card. Line 1 types first, then line 2. Card 1: “Agent Skills are now available” on line 1 and “in Cursor” on line 2 Card 2: “Skills let agents discover and run” and line 2 “specialized prompts and code.” Then play the skills.mp4 recording full-screen, framed top-aligned for first 2 seconds, then zoom in (with easing) to the top-left by about 125%. Should be continuous zoom! Final card: “This video was made entirely in Cursor" on line 1 and "with Remotion skills.” on line 2, then hold; End with the existing end.mp4 animation full-screen. Render and open the file inside Cursor’s browser tool to let me see it here!" 1. Uses an existing screen recording eric zakariasson made. 2. Uses our existing end card animation. 3. Had a Cursor rule with our brand guidelines and colors.

edwin

73,538 görüntüleme • 7 ay önce

** Sega Genesis 3D Engine Update 8 ** Significant improvements all round as you can see and hear from the last update !! Foremost - A huge thanks to Toni Gálvez - Megastyle - BG. who has joined the project to create a bit of 16bit low poly magic. Toni's an Amiga fan but also crazy about game dev in general, he's worked on GBC, GBA, PC, MD, PSP, C64, CPC, MSX... and others. Gaming titles include War Times, Metal Gear, Rocketman, Tintin & Asterix to name a few. He's provided the great new ship model you see on screen - new striped buildings, all the backgrounds / palettes etc. There's a lot of models he's given me which need to be added, also he will be planning a lot of the level design. Very happy to have him help me turn this into something more than a tech demo as I have my hands tied pushing the MD as far as it can go haha - there is no cpu cycle to be spared. Also many thanks to my good friend CYBERDEOUS - Crouzet Laurent for the Music for this showing , I wanted to have the music load occurring so we have a realistic benchmark for performance and he was only too obliging. If you're into MD chiptunes check him out !! Since last update : New player model , substantially more detailed than the Arwing. Last update had a 23 triangle Arwing , this update has a 39 triangle custom model from Toni. We had several to choose from , others will be used for enemies . 3D Buffer size increased 25% to 256x160. This was quite tricky as I'm close to the DMA limit even with an extended vblank . Spent a few days thinking of how to do this as like anything retro every solution has a drawback, finally got a workable solution. It makes a big difference to have a bit more vertical height . Z Rotation added ( the screen tilting left to right ) , small hit to vertex transform on cpu thanks to look up tables doing the heavy lifting, saving 4 multiplies per vertex. Multiple speed ups in rendering code. Onscreen paths with no range checking used until Z is close enough to cause clipping , partial onscreen drawing pathes that need to check boundaries, quad rendering completely rewritten - was very very painfull to get right . I found out the hard way that things are great when they are not rotating in the Z axis haha . Partial buffer draw optimisations - which have helped with the massive dma load , sending up to a 20kb buffer in a single frame needs a lot of optimisation. Min / Max tile lines are analysed and only sent if dirtied , reducing most buffer swaps substantially. Still some issues to sort out , at times you can see the flicker near top of screen when frames are near full height . I need to optimise that a bit. Due to the onscreen buffer system a full Sprite background had to be implemented almost Neo Geo style. This flips the usual MD rendering system on its head as it uses both foreground and background layers for a foreground 3d plane and sprites for the background. This presents a few issues, one is to get a tilt effect on the background by using narrow sprites (16x32) we run out of sprites when trying to cover the screen. Thankfully the MD is not limited to 80 sprites, to fix this a 114 sprite multiplexor is used to draw the background, its completely made up of 16x32 sprites ! Why do things this way ? speed . Its the interleaved foreground/background layers that allow a double buffered ram system writing to write to vram using dma in a completely linear fashion - virtually no tile translation needed. The negative is you have no planes for the background, that's where the sprites come in . Thanks to H40 mode we still have a few sprites we can use for effects in the forground also . Thankfully we can implement a fairly good tilt still for the background using sprites, in future updates this will be able to move horizontally also and a bit of vertical movement. XGM1 music driver in use to simulate music cpu load, XGM2 unfortunately with the massive DMA needed to shift the 3d buffers would slow down at times rendering it unusable, XGM1 plays at full speed - albiet with a bit more of a cpu hit. Together with the sprite multiplexor and the music driver active theres a 10 % hit to cpu so I've had to play around with draw distances / object heights and other optimisations to offset that. Not to mention the larger buffer takes more cpu to fill also. Everything is placeholder so will be changed with proper stage design. We are averaging 20 FPS in the current video, I'll push for more as always !! Progress continues on my other projects , updates soon on those - retirement can't come quick enough . #SGDK #SegaGenesis #SegaMegadrive

Sega Genesis 3D Engine Update 8 Significant improvements all round as you can see and hear from the last update !! Foremost - A huge thanks to Toni Gálvez - Megastyle - BG. who has joined the project to create a bit of 16bit low poly magic. Toni's an Amiga fan but also crazy about game dev in general, he's worked on GBC, GBA, PC, MD, PSP, C64, CPC, MSX... and others. Gaming titles include War Times, Metal Gear, Rocketman, Tintin & Asterix to name a few. He's provided the great new ship model you see on screen - new striped buildings, all the backgrounds / palettes etc. There's a lot of models he's given me which need to be added, also he will be planning a lot of the level design. Very happy to have him help me turn this into something more than a tech demo as I have my hands tied pushing the MD as far as it can go haha - there is no cpu cycle to be spared. Also many thanks to my good friend CYBERDEOUS - Crouzet Laurent for the Music for this showing , I wanted to have the music load occurring so we have a realistic benchmark for performance and he was only too obliging. If you're into MD chiptunes check him out !! Since last update : New player model , substantially more detailed than the Arwing. Last update had a 23 triangle Arwing , this update has a 39 triangle custom model from Toni. We had several to choose from , others will be used for enemies . 3D Buffer size increased 25% to 256x160. This was quite tricky as I'm close to the DMA limit even with an extended vblank . Spent a few days thinking of how to do this as like anything retro every solution has a drawback, finally got a workable solution. It makes a big difference to have a bit more vertical height . Z Rotation added ( the screen tilting left to right ) , small hit to vertex transform on cpu thanks to look up tables doing the heavy lifting, saving 4 multiplies per vertex. Multiple speed ups in rendering code. Onscreen paths with no range checking used until Z is close enough to cause clipping , partial onscreen drawing pathes that need to check boundaries, quad rendering completely rewritten - was very very painfull to get right . I found out the hard way that things are great when they are not rotating in the Z axis haha . Partial buffer draw optimisations - which have helped with the massive dma load , sending up to a 20kb buffer in a single frame needs a lot of optimisation. Min / Max tile lines are analysed and only sent if dirtied , reducing most buffer swaps substantially. Still some issues to sort out , at times you can see the flicker near top of screen when frames are near full height . I need to optimise that a bit. Due to the onscreen buffer system a full Sprite background had to be implemented almost Neo Geo style. This flips the usual MD rendering system on its head as it uses both foreground and background layers for a foreground 3d plane and sprites for the background. This presents a few issues, one is to get a tilt effect on the background by using narrow sprites (16x32) we run out of sprites when trying to cover the screen. Thankfully the MD is not limited to 80 sprites, to fix this a 114 sprite multiplexor is used to draw the background, its completely made up of 16x32 sprites ! Why do things this way ? speed . Its the interleaved foreground/background layers that allow a double buffered ram system writing to write to vram using dma in a completely linear fashion - virtually no tile translation needed. The negative is you have no planes for the background, that's where the sprites come in . Thanks to H40 mode we still have a few sprites we can use for effects in the forground also . Thankfully we can implement a fairly good tilt still for the background using sprites, in future updates this will be able to move horizontally also and a bit of vertical movement. XGM1 music driver in use to simulate music cpu load, XGM2 unfortunately with the massive DMA needed to shift the 3d buffers would slow down at times rendering it unusable, XGM1 plays at full speed - albiet with a bit more of a cpu hit. Together with the sprite multiplexor and the music driver active theres a 10 % hit to cpu so I've had to play around with draw distances / object heights and other optimisations to offset that. Not to mention the larger buffer takes more cpu to fill also. Everything is placeholder so will be changed with proper stage design. We are averaging 20 FPS in the current video, I'll push for more as always !! Progress continues on my other projects , updates soon on those - retirement can't come quick enough . #SGDK #SegaGenesis #SegaMegadrive

Shannon Birt

34,467 görüntüleme • 1 ay önce

** 3D Engine Update 6 ** New Buffer System. 15-20% Faster !! Using Planes A and B interleaved horizontally we can get the best of all worlds with a near continuous frame buffer for fast Triangle & Quad writes and still use DMA for fast sending of the RAM frame buffer to VRAM. Normally you get one benefit without the other leading to tradeoffs. There is a caveat ofcourse, I lose a spare plane , however thats not a large concern for what im trying to achieve, i still have the full sprite load if i need to simulate ground etc - we can also multiplex sprites if needed. So each plane is full of half fill tiles ( 4 pixels set in each tile row ) , which are then slightly offset to make the full image. Also changed to H40 mode for faster DMA albiet centered view , plenty of Hud options for side panels etc. What is quite cool is the layout in VRAM is very similar to what you see on screen just with some striping . VRAM layout to the right. Theres no more VRAM used verse a normal double buffer , the trick is here to send the buffer in one frame always as theres no room for a double buffer in vram. I have to implement partial ofscreen drawing yet hence the snapping from front to back you see still . #SGDK #SegaGenesis #SegaMegadrive

3D Engine Update 6 New Buffer System. 15-20% Faster !! Using Planes A and B interleaved horizontally we can get the best of all worlds with a near continuous frame buffer for fast Triangle & Quad writes and still use DMA for fast sending of the RAM frame buffer to VRAM. Normally you get one benefit without the other leading to tradeoffs. There is a caveat ofcourse, I lose a spare plane , however thats not a large concern for what im trying to achieve, i still have the full sprite load if i need to simulate ground etc - we can also multiplex sprites if needed. So each plane is full of half fill tiles ( 4 pixels set in each tile row ) , which are then slightly offset to make the full image. Also changed to H40 mode for faster DMA albiet centered view , plenty of Hud options for side panels etc. What is quite cool is the layout in VRAM is very similar to what you see on screen just with some striping . VRAM layout to the right. Theres no more VRAM used verse a normal double buffer , the trick is here to send the buffer in one frame always as theres no room for a double buffer in vram. I have to implement partial ofscreen drawing yet hence the snapping from front to back you see still . #SGDK #SegaGenesis #SegaMegadrive

Shannon Birt

12,758 görüntüleme • 4 ay önce

** Sega Genesis 3D Engine Day 3 ** Blast Processing kicks In !! Converted the Line Drawing and Triangle drawing to 68k Assembly and gained 25% in the line drawing and 33% speedups in the triangle drawing vs C ( so far ) . The scheduler calculating the vertexs is still in C , just the drawing routines are now are in assembly . Possibly 5-10 % gains will come from the scheduler being in ASM also. The Line and Triangle drawing C code took some beating , it was surprising - particularly the line drawing to get a speed up over the C code in ASM. I guess its not too surprising as the C code was basically handling pointers and integers so I had to get exotic to find the speedups. Initially my ASM Line draw was 100% slower than the C code - the first pass conversion from C to ASM is always rough as its more about getting it working then refine later , but yeah 100% slower on first pass was brutal, after 4 hrs tweaking it was 25% faster than the C code so thats a good start - might get more yet. So added more squares and more triangles for load testing at the same frame rate. Its still not anything cohesive but right now focussing on performance in rendering to see how much can be pushed. As rendering will be the biggest cpu soak the faster that goes the better. The smaller triangles take about 1/3 the CPU time of the larger triangles at present so theres definately a fill rate limit vs the setup time to consider. The same would go for the squares been line framed - smaller ones would allow al lot more . #SGDK #SegaGenesis #SegaMegadrive

Sega Genesis 3D Engine Day 3 Blast Processing kicks In !! Converted the Line Drawing and Triangle drawing to 68k Assembly and gained 25% in the line drawing and 33% speedups in the triangle drawing vs C ( so far ) . The scheduler calculating the vertexs is still in C , just the drawing routines are now are in assembly . Possibly 5-10 % gains will come from the scheduler being in ASM also. The Line and Triangle drawing C code took some beating , it was surprising - particularly the line drawing to get a speed up over the C code in ASM. I guess its not too surprising as the C code was basically handling pointers and integers so I had to get exotic to find the speedups. Initially my ASM Line draw was 100% slower than the C code - the first pass conversion from C to ASM is always rough as its more about getting it working then refine later , but yeah 100% slower on first pass was brutal, after 4 hrs tweaking it was 25% faster than the C code so thats a good start - might get more yet. So added more squares and more triangles for load testing at the same frame rate. Its still not anything cohesive but right now focussing on performance in rendering to see how much can be pushed. As rendering will be the biggest cpu soak the faster that goes the better. The smaller triangles take about 1/3 the CPU time of the larger triangles at present so theres definately a fill rate limit vs the setup time to consider. The same would go for the squares been line framed - smaller ones would allow al lot more . #SGDK #SegaGenesis #SegaMegadrive

Shannon Birt

21,171 görüntüleme • 4 ay önce

So how is the Sega Dreamcast's very own native port of Mario Kart 64 coming along? Well, lets take a look at some footage I just captured directly from my DC of jnmartin's latest build! Minor texture corruption is still present on some of the sprites here and there, plus there's no audio yet, BUT MY OH MY! She's running like a dream and looks SHARP as hell at with progressive scan at twice the resolution! You'll immediately notice virtually all of the texture corruption on the text and UI sprites have been fixed. You can now actually see your item box, and clouds are drawn properly in the background, rather than over the top of the scene in the foreground. Somehow, along with fixing all of this in the past few days, jnmartin has also found the time to get the monitors in the backgrounds of Luigi's Raceway and Wario Stadium correctly projecting a view of the scene onto their screens. This somewhat-advanced effect (for the time) was actually done on the N64 (in this game) WITHOUT doing a secondary render-to-texture pass, which requires submitting the scene a second time to the GPU. Instead, the framebuffer was divided into small, tiled chunks (1/6 of its total size), with only a single small chunk getting updated per frame. This way, the amount of direct VRAM access from the CPU (which is typically slow as hell) is kept to a minimum within the duration of a particular frame, with multiple frames being required to update the entire screen. But anyway, she's starting to look and play incredibly well, and those of us with early access to the builds have been thoroughly enjoying revisiting this title on our favorite platform!

So how is the Sega Dreamcast's very own native port of Mario Kart 64 coming along? Well, lets take a look at some footage I just captured directly from my DC of jnmartin's latest build! Minor texture corruption is still present on some of the sprites here and there, plus there's no audio yet, BUT MY OH MY! She's running like a dream and looks SHARP as hell at with progressive scan at twice the resolution! You'll immediately notice virtually all of the texture corruption on the text and UI sprites have been fixed. You can now actually see your item box, and clouds are drawn properly in the background, rather than over the top of the scene in the foreground. Somehow, along with fixing all of this in the past few days, jnmartin has also found the time to get the monitors in the backgrounds of Luigi's Raceway and Wario Stadium correctly projecting a view of the scene onto their screens. This somewhat-advanced effect (for the time) was actually done on the N64 (in this game) WITHOUT doing a secondary render-to-texture pass, which requires submitting the scene a second time to the GPU. Instead, the framebuffer was divided into small, tiled chunks (1/6 of its total size), with only a single small chunk getting updated per frame. This way, the amount of direct VRAM access from the CPU (which is typically slow as hell) is kept to a minimum within the duration of a particular frame, with multiple frames being required to update the entire screen. But anyway, she's starting to look and play incredibly well, and those of us with early access to the builds have been thoroughly enjoying revisiting this title on our favorite platform!

Falco Girgis

45,630 görüntüleme • 1 yıl önce

send/receive update There are over 1000 tokens configured with a sprite and set to send and over 500 set to receive on the send/receive network. 8968 editions were minted for free over the claim window and I set the final edition size to a clean 10k. The remaining mints will be used as an onboarding mechanism to introduce on chain interactive and participatory art to new people as I continue on my mission to make what we do around here interesting and compelling to new audiences. Seeing this many people interact with the work has been super meaningful, and I'm excited to keep expanding on the project over time. I particularly enjoyed having my kids log into @Artblocks with an email which generates a Privy embedded wallet and guiding them through the process of purchasing a mint off secondary and configuring it (after I funded the wallet with a bit of ETH). Once they set it up they ran to the living room where we have a receiving token set up and watched and waited until their's appeared. We sit around and watch the live view often pointing out all the fun sprites but when they saw theirs they got REALLY excited and continue to do so as they walk past it and see their contribution every day. I think there's something really interesting about all this. Seeing yourself in a networked artwork like this seems to be compelling to folks, and I am excited to watch the network of sprites grow over time. I'm especially excited about the perpetual nature of the work, and the fact that all of the information and logic is on chain in a way where it should continue to operate as long as the Ethereum blockchain continues to produce blocks. Am also shocked at how cheap the customization of it is. You're storing a lot of info on chain for less than $1. Was always worried about this being on L1 and I know we can't count on this forever but really really pleased with the low cost to participate. If you have a token and haven't set it up yet just know it's super easy and smooth thanks to the Art Blocks UI that the team built. But if you're still intimidated maybe consider commissioning your favorite pixel artist to create a sprite for you. Anyways make sure and check into a live view every now and then to see all the sprites that have been created by the community. Change up your send/receive state or swap out your sprite when you're feeling it. I hope you're enjoying the experience of on chain participatory networked art as much as I am.

send/receive update There are over 1000 tokens configured with a sprite and set to send and over 500 set to receive on the send/receive network. 8968 editions were minted for free over the claim window and I set the final edition size to a clean 10k. The remaining mints will be used as an onboarding mechanism to introduce on chain interactive and participatory art to new people as I continue on my mission to make what we do around here interesting and compelling to new audiences. Seeing this many people interact with the work has been super meaningful, and I'm excited to keep expanding on the project over time. I particularly enjoyed having my kids log into @Artblocks with an email which generates a Privy embedded wallet and guiding them through the process of purchasing a mint off secondary and configuring it (after I funded the wallet with a bit of ETH). Once they set it up they ran to the living room where we have a receiving token set up and watched and waited until their's appeared. We sit around and watch the live view often pointing out all the fun sprites but when they saw theirs they got REALLY excited and continue to do so as they walk past it and see their contribution every day. I think there's something really interesting about all this. Seeing yourself in a networked artwork like this seems to be compelling to folks, and I am excited to watch the network of sprites grow over time. I'm especially excited about the perpetual nature of the work, and the fact that all of the information and logic is on chain in a way where it should continue to operate as long as the Ethereum blockchain continues to produce blocks. Am also shocked at how cheap the customization of it is. You're storing a lot of info on chain for less than $1. Was always worried about this being on L1 and I know we can't count on this forever but really really pleased with the low cost to participate. If you have a token and haven't set it up yet just know it's super easy and smooth thanks to the Art Blocks UI that the team built. But if you're still intimidated maybe consider commissioning your favorite pixel artist to create a sprite for you. Anyways make sure and check into a live view every now and then to see all the sprites that have been created by the community. Change up your send/receive state or swap out your sprite when you're feeling it. I hope you're enjoying the experience of on chain participatory networked art as much as I am.

Erick / Snowfro / 🦩 / LAO / #️⃣ / 🔴

17,009 görüntüleme • 7 ay önce

As requested by Alex Miller yesterday, a look at our out of possession shape in the first half. 1: (10 secs) - Wednesday in a very narrow high block in a 523 out of possession. It only looked like this when the ball is central. Nowrich rotate (change positions during play) a lot and this narrow block denies central rotation. In this clip, they have had rotation in left back position as the CM has dropped into the area and left back on the last line. 2: 20 secs - When the ball went wide or started to move wide, the full back would advance up the pitch to pressure the full back and press full back to full back, whilst the CBs would come out with the Norwich forwards coming in between the lines, as this ball transitions across the pitch you see Sargent come out and Iorfa following tight. Fusire in this clip has come out to mark full back to full back and creating a makeshift back 4. 3: 47 secs - Wednesday get back into their narrow block shape 4: 56 secs - rotation from the front line form Norwich 5: 58 seconds, Palmer comes out of the back line to pick up the rotation and prevent space between lines. As the player turns to our left, Amass starts to come out to pick up full back to full back on the other side. In summary, Wednesday played their familiar 523 blocking shape out of possession but it was much more proactive in the back 5 than we usually see it, with full backs and Cbs following rotations and stepping out of the backline to prevent space between lines. It worked, first half. Norwich combated it a little better second half. Will get a clip out tomorrow of what they did

As requested by Alex Miller yesterday, a look at our out of possession shape in the first half. 1: (10 secs) - Wednesday in a very narrow high block in a 523 out of possession. It only looked like this when the ball is central. Nowrich rotate (change positions during play) a lot and this narrow block denies central rotation. In this clip, they have had rotation in left back position as the CM has dropped into the area and left back on the last line. 2: 20 secs - When the ball went wide or started to move wide, the full back would advance up the pitch to pressure the full back and press full back to full back, whilst the CBs would come out with the Norwich forwards coming in between the lines, as this ball transitions across the pitch you see Sargent come out and Iorfa following tight. Fusire in this clip has come out to mark full back to full back and creating a makeshift back 4. 3: 47 secs - Wednesday get back into their narrow block shape 4: 56 secs - rotation from the front line form Norwich 5: 58 seconds, Palmer comes out of the back line to pick up the rotation and prevent space between lines. As the player turns to our left, Amass starts to come out to pick up full back to full back on the other side. In summary, Wednesday played their familiar 523 blocking shape out of possession but it was much more proactive in the back 5 than we usually see it, with full backs and Cbs following rotations and stepping out of the backline to prevent space between lines. It worked, first half. Norwich combated it a little better second half. Will get a clip out tomorrow of what they did

TW Football

16,673 görüntüleme • 9 ay önce