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Garrett Johnson
@garrettkjohnson
three.js, graphics, open source, and a bunch of fun projects! Formerly @Woven_Toyota | @NASAJPL
Tokyo, Japan
gkjohnson.github.io
Joined April 2009
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  • user avatar
    Garrett Johnson
    @garrettkjohnson
    May 11, 2025
    I finally got around to writing GeoJSON parser for threejs. It supports triangulating & extruding polygons, and projecting all GeoJSON types onto an ellipsoid for integration with projects like 3d tiles! 🌎 Repo with demo links below 👇 #threejs #gis #3dtiles #webgl #javascript
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    Garrett Johnson
    @garrettkjohnson
    Apr 20, 2025
    This is the 5th or 6th time I've written a topography shader & every time it gets a little bit better & I learn a little bit more. It's a nice challenge for anyone learning about shaders! Some details on the plans for this implementation below 👇 #gis #3dtiles #threejs #webgl
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  • user avatar
    Garrett Johnson
    @garrettkjohnson
    May 27, 2025
    I've gotten contour and latitude / longitude lines working with ellipsoidal tile sets in 3D Tiles Renderer - demo link below! 🌎✨ #threejs #webgl #3dtiles #gis #cesiumgrant
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    user avatar
    Garrett Johnson
    @garrettkjohnson
    Apr 20, 2025
    This is the 5th or 6th time I've written a topography shader & every time it gets a little bit better & I learn a little bit more. It's a nice challenge for anyone learning about shaders! Some details on the plans for this implementation below 👇 #gis #3dtiles #threejs #webgl
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  • user avatar
    Garrett Johnson
    @garrettkjohnson
    May 19, 2025
    My three-geojson repo now supports internal polygon vertices via constrained delaunay triangulation so extruded shapes can be projected onto an ellipsoid surface with generated smooth normals! 🌎 More below👇 1/3 #threejs #gis #javascript #webgl
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  • user avatar
    Garrett Johnson
    @garrettkjohnson
    Jun 20, 2023
    The latest release 0.3.19 of 3DTilesRenderer from NASA adds fixes and improvements for rendering Google's photorealistic 3d tiles! That includes a new GoogleTilesRenderer convenience class for easily loading a globe. 1/2 github.com/NASA-AMMOS/3DT… #threejs #webgl #3dtiles #nasajpl
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  • user avatar
    Garrett Johnson
    @garrettkjohnson
    Nov 29, 2022
    Path traced videos rendered with three.js? Yes! I've just added a new example that shows how to render three-gpu-pathtracer frames into a video so you can save out high quality animations! Heres the demo! 🥟 gkjohnson.github.io/three-gpu-path… #threejs #javascript #webgl #raytracing
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    Garrett Johnson
    @garrettkjohnson
    Mar 30, 2022
    A quick preview of the three.js pathtracer material progress! Metalness, opacity, and glossiness are just about done. Still some work to go on transmission, emission, and alpha cutout, though. Demo soon! github.com/gkjohnson/thre… #threejs #graphics #pathtracing #javascript
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    Garrett Johnson
    @garrettkjohnson
    Apr 4, 2022
    Got transmission working in three-gpu-pathtracer over the weekend! Its just using hemisphere sampling for the refracted direction but it looks nice. Might need some help getting GGX transmission going in the future! gkjohnson.github.io/three-gpu-path… #threejs #webgl #graphics #raytracing
  • user avatar
    Garrett Johnson
    @garrettkjohnson
    Nov 23, 2023
    BatchedMesh will be in #threejs core in r159! This includes support for frustum culling, raycasting, object sorting, multidraw, & more! Here's an updated version of the tiles demo rendering only visible triangles using multidraw with 1 draw call. #gamedev #webgl #javascript
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  • user avatar
    Garrett Johnson
    @garrettkjohnson
    Dec 11, 2023
    Here's a demo showing how material properties can be packed into a data texture so thousands of objects with unique material properties can be rendered in a single draw call with #threejs's BatchedMesh. With more effort this can support unique textures, too! 1/2 #gamedev #webgl
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  • user avatar
    Garrett Johnson
    @garrettkjohnson
    Apr 18, 2022
    A new version of three-mesh-bvh has been released with support for converting skinned and morph target meshes into a static geometry so a BVH can be generated for animated geometry! More on perf and how below 👇 1/4 github.com/gkjohnson/thre… #threejs #webgl #graphics #opensource
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    Garrett Johnson
    @garrettkjohnson
    May 20, 2024
    It doesn't look like much here but Ive updated #threejs' BatchedMesh to support instancing in addition to batching including sorting and frustum culling! Here 20,000 items are drawn in a single draw call using only 3 unique geometries- a significant memory savings! 1/3 #webgl
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  • user avatar
    Garrett Johnson
    @garrettkjohnson
    Apr 11, 2022
    The initial version of three-gpu-pathtracer has been released on npm! Looking forward to seeing what people make with it. Please share! And as always contributions welcome and encouraged! github.com/gkjohnson/thre… #threejs #graphics #webgl #raytracing
  • user avatar
    Garrett Johnson
    @garrettkjohnson
    Jul 26, 2021
    Someone on the #threejs forum had the idea to use three-mesh-bvh to accelerate finding clip edges which brings the time to find the edges on this 2m polygon model down to real time speeds. gkjohnson.github.io/three-mesh-bvh… #webgl #opensource #javascript #cad #threemeshbvh 1/2
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