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Generate a point cloud in glTF format, using glTF Transform.
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| import { Document, NodeIO, Primitive } from '@gltf-transform/core'; | |
| const document = new Document(); | |
| const buffer = document.createBuffer(); | |
| const position = document.createAccessor() | |
| .setType('VEC3') | |
| .setBuffer(buffer) | |
| .setArray(new Float32Array([ | |
| 0, 0, 0, // ax,ay,az | |
| 0, 0, 1, // bx,by,bz | |
| 0, 1, 0, // ... | |
| 1, 0, 0, | |
| ])); | |
| const color = document.createAccessor() | |
| .setType('VEC4') | |
| .setBuffer(buffer) | |
| .setNormalized(true) | |
| .setArray(new Uint8Array([ | |
| 0, 0, 0, 255, | |
| 0, 0, 255, 255, | |
| 0, 255, 0, 255, | |
| 255, 0, 0, 255, | |
| ])); | |
| const prim = document | |
| .createPrimitive() | |
| .setMode(Primitive.Mode.POINTS) | |
| .setAttribute('POSITION', position) | |
| .setAttribute('COLOR_0', color); | |
| const mesh = document.createMesh().addPrimitive(prim); | |
| const node = document.createNode().setMesh(mesh); | |
| const scene = document.createScene().addChild(node); | |
| document.getRoot().setDefaultScene(scene); | |
| const io = new NodeIO(); | |
| await io.write('./points.glb', document); |
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