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Got the BVH (AABB tree) working with a nice visualization. (The circles and arrows show the hierarchy of the tree.) This is all CPU-side for now, so next is to ship the BVH to the GPU for accelerating SDF brick baking. It's already in a flat buffer so that... show more

Mike Turitzin

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36,134 views • 1 year ago •via X (Twitter)

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✨ I added actual collision maps to as Javi Lopez ⛩️ kept telling me to do at our weekly coworking day today This means now the drone can not fly through buildings but it can fly through holes inside buildings like windows etc. Buildings are important because you can take cover there, bullets also hit the collision maps At the end of the video to show it worked I flew the drone a bit too hard into the wall so it died 😂 The tech behind it is Mesh BVH, so cool!!! "Mesh BVH is a THREE.js addon that builds a Bounding Volume Hierarchy from a mesh's triangles. A BVH is a tree where each node holds a box containing some triangles; child nodes split those triangles into smaller boxes. Queries walk the tree and skip entire branches that can't possibly contain the answer, turning "check all 5,000 triangles" into "check ~log₂(5000) ≈ 12 boxes."

✨ I added actual collision maps to as Javi Lopez ⛩️ kept telling me to do at our weekly coworking day today This means now the drone can not fly through buildings but it can fly through holes inside buildings like windows etc. Buildings are important because you can take cover there, bullets also hit the collision maps At the end of the video to show it worked I flew the drone a bit too hard into the wall so it died 😂 The tech behind it is Mesh BVH, so cool!!! "Mesh BVH is a THREE.js addon that builds a Bounding Volume Hierarchy from a mesh's triangles. A BVH is a tree where each node holds a box containing some triangles; child nodes split those triangles into smaller boxes. Queries walk the tree and skip entire branches that can't possibly contain the answer, turning "check all 5,000 triangles" into "check ~log₂(5000) ≈ 12 boxes."

@levelsio

75,642 views • 3 months ago

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.

Mike Turitzin

39,022 views • 2 years ago

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.)

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18,486 views • 1 year ago

Just integrated BVH for SDF generation, and added Sampling + Volume Collision support across all my simulations! Super excited to ship the Three.js Blocks release later this month! 🚀 1/5

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Renaud

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With the new abstractions in three-mesh-bvh, making a custom BVH is easier than ever! SkinnedMeshes can now have one created directly, leading to an over 2x perf improvement on update vs creating a new static mesh. 🚀 What else needs a BVH? 1/2 👇 #threejs #webgl #gamedev

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🐿️ Make it look like a tree, you know? So a tree stump and the lift starts going up. The lift is like the roots of a tree - like I have my roots in this stage. The stage design for Safety Zone was Hobi’s idea 😭🫂

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Her chosen tree is growing right along the side of a busy jogging path, and even with my camera pointed at her, most of the people who pass within a few feet of her never even notice her as she sits quietly in her tree, waiting for the curtain of night to start the next act.

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Mark Smith Photography

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Path tracing LGK now also with the new mirror PSR feature. Note some the BVH meshes specifically alpha testing for leaves is not setup yet

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New sidewalk in San Diego, California put tree ring symbols for each tree that was cut down to create the sidewalk Next to the symbols they put how old each tree was that they cut down. They then placed the tree-trunk sections as sculptures This is mean to highlight how long it takes for trees to grow and the environmental trade-offs of urban building Classic California

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Got inspired by Dale Stark videos of tree trimming so I tried my hand in it. So far so good. Client was super happy the tree is gone. The neighbor complained a bit! Easy money...

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฿₳₮₮ⱠɆ ฿ɎⱤĐ

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In Brazil, there is a single tree that is so big it looks like an entire forest. It is the world's largest cashew tree, and it covers an area of about 8,400 square meters, that's about the size of a football field.

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