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Mike Turitzin

@miketuritzin • 7,180 subscribers

Building a game/engine based on signed distance fields ~ Past: rendering lead @figma, indie VR dev, founder @workflowy, search backend @ Google, Quake modder

Shorts

Playing around with a "tunnel gun" that can open a tunnel in front of you that can be looked into or moved through. This type of thing is really simple in my engine - just spawn an SDF capsule subtraction that is locked to the player's view.

Playing around with a "tunnel gun" that can open a tunnel in front of you that can be looked into or moved through. This type of thing is really simple in my engine - just spawn an SDF capsule subtraction that is locked to the player's view.

281,995 görüntüleme

Experimenting with a SDF material blend function that is "stamps" the material volumetrically. The previous function I was using (which is the common one) blends the material around the surface influence area, and so would have no effect below ground.

Experimenting with a SDF material blend function that is "stamps" the material volumetrically. The previous function I was using (which is the common one) blends the material around the surface influence area, and so would have no effect below ground.

154,165 görüntüleme

Metallic materials are now officially supported in my engine. Previously, I hacked this for some videos by interpreting inverse "roughness" as "metallic", but obviously that isn't a great long-term solution :)

Metallic materials are now officially supported in my engine. Previously, I hacked this for some videos by interpreting inverse "roughness" as "metallic", but obviously that isn't a great long-term solution :)

38,349 görüntüleme

Cleaning up SDF physics objects with a portable hole. Oddly satisfying.

Cleaning up SDF physics objects with a portable hole. Oddly satisfying.

108,178 görüntüleme

I too use the sphere making algorithm

I too use the sphere making algorithm

67,316 görüntüleme

My engine doesn't currently support baking "metallic" into the SDF, but I can tweak a number in the shader to make everything metal 🤘🤘 I feel like I can hear a "clank" when shooting this stuff.

My engine doesn't currently support baking "metallic" into the SDF, but I can tweak a number in the shader to make everything metal 🤘🤘 I feel like I can hear a "clank" when shooting this stuff.

67,119 görüntüleme

Prowling around the SDF yards after dark, desecrating spheres with reckless abandon.

Prowling around the SDF yards after dark, desecrating spheres with reckless abandon.

35,818 görüntüleme

Sparse allocation/rendering of SDF bricks is now working! The pipeline is fully GPU-driven - a series of compute shaders that manages brick allocation/baking in a 3D texture atlas, followed by draw-indirect for rendering. Still a lot more work to do, including automatic LOD.

Sparse allocation/rendering of SDF bricks is now working! The pipeline is fully GPU-driven - a series of compute shaders that manages brick allocation/baking in a 3D texture atlas, followed by draw-indirect for rendering. Still a lot more work to do, including automatic LOD.

38,926 görüntüleme

This article is a great dive into the nuts and bolts of creating one of those tiny (but neat) shaders. Both in terms of algorithms and GLSL character minimization!

This article is a great dive into the nuts and bolts of creating one of those tiny (but neat) shaders. Both in terms of algorithms and GLSL character minimization!

13,248 görüntüleme

Moving to PBR shading (with baked roughness) is already making things look a lot more "real", even with very primitive lighting. Coming next is imaged-based lighting for diffuse+specular, SSAO, and shadows. More details: 1/

Moving to PBR shading (with baked roughness) is already making things look a lot more "real", even with very primitive lighting. Coming next is imaged-based lighting for diffuse+specular, SSAO, and shadows. More details: 1/

16,726 görüntüleme

Baking the SDF collision mesh sparsely via running marching cubes on world-space chunks. Each chunk's mesh is added to the physics sim as a static mesh body. When an SDF op is set to "dynamic" a dynamic body is created (and the op is longer included in the collision mesh).

Baking the SDF collision mesh sparsely via running marching cubes on world-space chunks. Each chunk's mesh is added to the physics sim as a static mesh body. When an SDF op is set to "dynamic" a dynamic body is created (and the op is longer included in the collision mesh).

18,019 görüntüleme

Ran across this great article on sampled SDFs that has *great* interactive WebGL illustrations that work really well for building intuition on how this works. This technique works for SDF-based text rendering or baking of 3D geometry like in my project.

Ran across this great article on sampled SDFs that has great interactive WebGL illustrations that work really well for building intuition on how this works. This technique works for SDF-based text rendering or baking of 3D geometry like in my project.

17,799 görüntüleme

Tracing a ray against the BVH and highlighting the leaves that are tested. (This is an "any hit" test for demonstration purposes! Next vid is shows closest-hit raycast.)

Tracing a ray against the BVH and highlighting the leaves that are tested. (This is an "any hit" test for demonstration purposes! Next vid is shows closest-hit raycast.)

18,486 görüntüleme

Added "corner radius" / rounding, which is easy to apply to any SDF shape that has an exact (outer) distance function - just subtract the radius from the scale and then offset the computed distance by the same radius. So you get rounded shapes "for free" with 1 subtraction. 1/

Added "corner radius" / rounding, which is easy to apply to any SDF shape that has an exact (outer) distance function - just subtract the radius from the scale and then offset the computed distance by the same radius. So you get rounded shapes "for free" with 1 subtraction. 1/

11,456 görüntüleme

Another large speedup to SDF brick rendering (-20-40%) that is obvious in hindsight: When baking bricks, calculate the texel bounds that actually contain the surface, and then rasterize/ray-march just those bounds rather than the full brick bounds. 1/

Another large speedup to SDF brick rendering (-20-40%) that is obvious in hindsight: When baking bricks, calculate the texel bounds that actually contain the surface, and then rasterize/ray-march just those bounds rather than the full brick bounds. 1/

11,310 görüntüleme

Videos

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Experimenting with strong materials that can't be dug through using normal tools. Gameplay ideas: - block player movement, making underground navigation more complex - enclose special resources that need to be extracted using explosives or other means

Experimenting with strong materials that can't be dug through using normal tools. Gameplay ideas: - block player movement, making underground navigation more complex - enclose special resources that need to be extracted using explosives or other means

140,415 görüntüleme • 3 ay önce

It is now possible to vomit (SDF) cubes in my engine! This video shows the "sticky" mode first, which is satisfying with smooth blends, followed by the "dynamic body" mode.

It is now possible to vomit (SDF) cubes in my engine! This video shows the "sticky" mode first, which is satisfying with smooth blends, followed by the "dynamic body" mode.

76,219 görüntüleme • 1 yıl önce

First version of underground "biomes". They're currently defined by distance to the terrain surface. The idea is that different biomes have different resources, obstacles, caves, etc. The bottom one is very dark🤠 [cont]

First version of underground "biomes". They're currently defined by distance to the terrain surface. The idea is that different biomes have different resources, obstacles, caves, etc. The bottom one is very dark🤠 [cont]

15,958 görüntüleme • 2 ay önce

The beginnings of prototyping digging/mining gameplay. Resources are embedded in the ground and are dislodged when the surface is cut away. They're placed in colored regions that reveal their proximity. Lots of different directions to go with this, continuing to experiment!

The beginnings of prototyping digging/mining gameplay. Resources are embedded in the ground and are dislodged when the surface is cut away. They're placed in colored regions that reveal their proximity. Lots of different directions to go with this, continuing to experiment!

23,262 görüntüleme • 3 ay önce

Experimenting with "digging" using rotated cubes as the subtraction primitive instead of spheres. I like the jagged/angular/detailed look, but I'm going to try other shapes (like tetrahedron or pyramid) that aren't all right angles.

Experimenting with "digging" using rotated cubes as the subtraction primitive instead of spheres. I like the jagged/angular/detailed look, but I'm going to try other shapes (like tetrahedron or pyramid) that aren't all right angles.

45,203 görüntüleme • 10 ay önce

Finished implementing diffuse and specular image-based ambient lighting, and things are looking a lot nicer. This is still without any shadows or AO, so that's next! I also switched to using ACES for tonemapping, which is similar to what I had before but seems a bit nicer.

Finished implementing diffuse and specular image-based ambient lighting, and things are looking a lot nicer. This is still without any shadows or AO, so that's next! I also switched to using ACES for tonemapping, which is similar to what I had before but seems a bit nicer.

33,333 görüntüleme • 11 ay önce

I built a sculpture for Burning Man.

I built a sculpture for Burning Man.

11,094 görüntüleme • 3 ay önce

Demo of bilinear interpolation of SDF samples: - Negative (interior) samples of the analytic SDF are blue, positive (exterior) samples are orange. - Circles are drawn around samples to show distance magnitude. - Intermediate bilinear interp samples / segments are drawn. 1/

Demo of bilinear interpolation of SDF samples: - Negative (interior) samples of the analytic SDF are blue, positive (exterior) samples are orange. - Circles are drawn around samples to show distance magnitude. - Intermediate bilinear interp samples / segments are drawn. 1/

16,295 görüntüleme • 7 ay önce

Herding cubes.

Herding cubes.

26,638 görüntüleme • 1 yıl önce

My foes when I confront them

My foes when I confront them

14,627 görüntüleme • 7 ay önce

Got SDF collision mesh generation (via marching cubes) working with Jolt Physics! The collision mesh is regenerated when the SDF scene changes. Individual SDF primitives can be made "dynamic", which adds them as physics objects. 1/

Got SDF collision mesh generation (via marching cubes) working with Jolt Physics! The collision mesh is regenerated when the SDF scene changes. Individual SDF primitives can be made "dynamic", which adds them as physics objects. 1/

10,913 görüntüleme • 1 yıl önce

Daha fazla içerik yok.