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Try out the model viewer

\n \n \n

,\n );\n});\n\nexport default app.fetch;","/** @jsxImportSource npm:hono@3/jsx */\nimport { Buffer } from \"https://deno.land/std/io/buffer.ts\";\nimport { Hono } from \"npm:hono\";\nimport { html } from \"npm:hono/html\";\nimport type { Child, FC } from \"npm:hono/jsx\";\nimport { jsxRenderer, useRequestContext } from \"npm:hono/jsx-renderer\";\n\nconst app = new Hono();\n\nfunction createTorus(radius = 1, tube = 0.4, radialSegments = 12,tubularSegments = 48, arc = Math.PI * 2) {\n const indicesArray = [];\n const positionArray = [];\n const uvArray = [];\n\n const vertex = [0, 0, 0];\n\n // generate positions and uvs\n for (let j = 0; j <= radialSegments; j++) {\n for (let i = 0; i <= tubularSegments; i++) {\n const u = (i / tubularSegments) * arc;\n const v = (j / radialSegments) * Math.PI * 2;\n\n // position\n vertex[0] = (radius + tube * Math.cos(v)) * Math.cos(u);\n vertex[1] = (radius + tube * Math.cos(v)) * Math.sin(u);\n vertex[2] = tube * Math.sin(v);\n positionArray.push(vertex[0], vertex[1], vertex[2]);\n\n // uv\n uvArray.push(i / tubularSegments);\n uvArray.push(j / radialSegments);\n }\n }\n\n // generate indices\n for (let j = 1; j <= radialSegments; j++) {\n for (let i = 1; i <= tubularSegments; i++) {\n // indices\n const a = (tubularSegments + 1) * j + i - 1;\n const b = (tubularSegments + 1) * (j - 1) + i - 1;\n const c = (tubularSegments + 1) * (j - 1) + i;\n const d = (tubularSegments + 1) * j + i;\n\n // faces\n indicesArray.push(a, b, d);\n indicesArray.push(b, c, d);\n }\n }\n\n return { indicesArray, positionArray, uvArray };\n}\n\n// indices\n// position\n// texcoord\n// material\n// primitive\n// mesh\n// node (with mesh and translation 0,0,0)\n// scene (with single node)\n\n// I think we make 3 buffers\n// (for simplicity, even though they can be combined.)\n\n// indices, positions and uvs\n\nconst { indicesArray, positionArray, uvArray } = createTorus();\n\nconst indices_uint16 = new Uint16Array(indicesArray);\nconst position_float32 = new Float32Array(positionArray);\nconst uv_float32 = new Float32Array(uvArray);\n\nconst COMPONENT_TYPE_U16 = 5123;\nconst COMPONENT_TYPE_F32 = 5126;\n\nconst TARGET_ARRAY_BUFFER = 34962; // vertex data\nconst TARGET_ELEMENT_ARRAY_BUFFER = 34963; // indices\n\nconst test_scene = {\n asset: {\n version: \"2.0\",\n },\n buffers: [\n {\n byteLength: indices_uint16.byteLength,\n uri: \"data:application/octet-stream;base64,\"+btoa(String.fromCharCode(...new Uint8Array(indices_uint16.buffer))),\n },\n {\n byteLength: position_float32.byteLength,\n uri: \"data:application/octet-stream;base64,\"+btoa(String.fromCharCode(...new Uint8Array(position_float32.buffer))),\n },\n {\n byteLength: uv_float32.byteLength,\n uri: \"data:application/octet-stream;base64,\"+btoa(String.fromCharCode(...new Uint8Array(uv_float32.buffer))),\n }\n ],\n bufferViews: [\n {\n buffer: 0,\n byteOffset: 0,\n byteLength: indicesArray.length * 16 / 8,\n target: TARGET_ELEMENT_ARRAY_BUFFER\n },\n {\n buffer: 1,\n byteOffset: 0,\n byteLength: positionArray.length * 32 / 8,\n target: TARGET_ARRAY_BUFFER,\n byteStride: 32 / 8 * 3 // 3 floats\n },\n {\n buffer: 2,\n byteOffset: 0,\n byteLength: uvArray.length * 32 / 8,\n target: TARGET_ARRAY_BUFFER,\n byteStride: 32 / 8 * 2 // 2 floats\n },\n ],\n accessors: [\n {\n bufferView: 0,\n componentType: COMPONENT_TYPE_U16,\n count: indicesArray.length,\n type: \"SCALAR\",\n },\n {\n bufferView: 1,\n componentType: COMPONENT_TYPE_F32,\n count: positionArray.length / 3,\n type: \"VEC3\",\n },\n {\n bufferView: 2,\n componentType: COMPONENT_TYPE_F32,\n count: uvArray.length / 2,\n type: \"VEC2\",\n },\n ],\n materials: [\n {\n name: \"material\",\n pbrMetallicRoughness: {\n baseColorFactor: [\n 0.6938717612856897,\n 0.12743768042608497,\n 0.09989872823822872,\n 1\n ],\n metallicFactor: 0,\n roughnessFactor: 1\n }\n }\n ],\n meshes: [\n {\n primitives: [\n {\n mode: 4,\n indices: 0,\n attributes: {\n \"POSITION\": 1,\n \"TEXCOORD_0\": 2\n },\n material: 0,\n }\n ]\n }\n ],\n nodes: [\n {\n name: \"torus\",\n mesh: 0,\n }\n ],\n scenes: [\n {\n name: \"scene\",\n nodes: [0]\n }\n ],\n scene: 0,\n};\n\napp.get(\"/test_scene.gltf\", (c) => {\n c.header(\"Content-Type\", \"model/gltf+json\");\n return c.body(JSON.stringify(test_scene));\n});\n\nconst Layout: FC<{ children: Child }> = ({ children }) => {\n return (\n \n \n \n \n \n \n \n {children}\n \n \n );\n};\n\napp.use(\"*\", jsxRenderer(({ children }) => ));\n\napp.get(\"/\", (c) => {\n return c.render(\n

Try out the model viewer

\n \n \n

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Diff · v17