\/\/...\n\nprivate modeObj?: any;\nprivate modeData?: any;\n\n\/\/...\n\n\/\/...\n\nfunction loadFile(url: string) {\n new Promise((resolve, reject) => {\n\n });\n var xhr = new XMLHttpRequest();\n xhr.open('GET', url, false);\n xhr.onload = function () {\n if (xhr.status != 200) {\n console.log('\u52a0\u8f7d\u4e2d:' + xhr.status + '\/ ' + xhr.statusText);\n } else {\n result = xhr.responseText;\n }\n }\n xhr.send();\n}\n\nmodeObj = await loadFile(CUBE, 'https:\/\/hungking.cc\/xxxx.obj');\n\n\/\/...<\/code><\/pre>\n\u8fd9\u91cc\u4e3a\u4e86\u9632\u6b62\u65e0\u8111\u6284\u88ad\uff0c\u4f7f\u7528\u539f\u751f\u3002\u5b9e\u9645\u751f\u4ea7\u4f1a\u4f7f\u7528fetch<\/em>\u6216\u8005\u4f7f\u7528Promise<\/em>\uff0c\u7b2c\u4e09\u65b9\u5e93axios<\/em>\u7b49\u3002<\/p>\n\u6a21\u578b\u5904\u7406<\/h2>\n
\u6a21\u578b\u52a0\u8f7d\u5b8c\u540e\u4e0d\u80fd\u76f4\u63a5\u4f7f\u7528\uff0c\u9700\u8981\u5904\u7406\u6210\u53ef\u88ab\u8bc6\u522b\u7684\u6570\u636e\u7ed3\u6784\uff0c \u6570\u636e\u5904\u7406\u6bd4\u8f83\u7b80\u5355\uff1a<\/p>\n
\/\/...\n\nasync function loadObj(obj: any) {\n if (!obj) throw new Error("\u6570\u636e\u9519\u8bef\uff1a" + obj);\n let objText = obj.trim() + "\\n";\n let startSTR = 0;\n let finishSTR = objText.indexOf("\\n", 0);\n let V = [1];\n let T = [1];\n let N = [1];\n let F = [1];\n let vertex = [];\n let uv = [];\n let normals = [];\n let faces = [];\n let face = [];\n let faceindex = 0;\n let objLineArray = objText.split("\\n");\n\n for (let indexLine = 0; indexLine < objLineArray.length; indexLine++) {\n let line = objLineArray[indexLine];\n line = line.trim().replace(\/\\s+\/g, ' ');\n let lineData: any = line.split(" ");\n const typeVertexData = lineData[0];\n if (typeVertexData === "v") {\n lineData.shift();\n lineData = lineData.map(parseFloat);\n V.push(lineData);\n } else if (typeVertexData === "vt") {\n lineData.shift();\n lineData = lineData.map(parseFloat);\n lineData[2] = 0.0;\n T.push(lineData.slice(0, 2));\n } else if (typeVertexData === "vn") {\n lineData.shift();\n lineData = lineData.map(parseFloat);\n N.push(lineData);\n } else if (typeVertexData === "f") {\n lineData.shift();\n for (let index = 0; index < lineData.length - 2; index++) {\n for (let indexTriangel = 0; indexTriangel < 3; indexTriangel++) {\n let vertexDataArray = lineData[indexTriangel + index];\n if (indexTriangel == 2) {\n indexTriangel = lineData.length - 1;\n vertexDataArray = lineData[indexTriangel];\n }\n\n let vertexData = vertexDataArray.split("\/");\n for (let i = 0; i < 3; i++) {\n if (vertexData[0] < 0) {\n vertexData[0] = V.length + 1 + parseInt(vertexData[0]);\n }\n if (vertexData[1] < 0) {\n vertexData[1] = T.length + 1 + parseInt(vertexData[1]);\n }\n if (vertexData[2] < 0) {\n vertexData[2] = N.length + 1 + parseInt(vertexData[2]);\n }\n }\n\n for (let index = 0; index < vertexData.length; index++) {\n switch (index) {\n case 0:\n vertex.push(V[vertexData[0]]);\n break;\n case 1:\n uv.push(T[vertexData[1]]);\n break;\n case 2:\n normals.push(N[vertexData[2]]);\n break;\n default:\n break;\n }\n }\n faces.push(faceindex);\n faceindex++;\n }\n }\n }\n }\n\n return {\n vertex,\n uv,\n normals,\n faces,\n };\n}\n\n\/\/...\n\nmodelData = await loadModel(modeObj);<\/code><\/pre>\n\u5904\u7406\u5b8c\u540e\uff0c\u6570\u7ec4\u4e2d\u542b\u6709\u591a\u7ef4\u6570\u7ec4\uff0c\u9700\u8981\u6241\u5e73\u5316\u5904\u7406\uff0c\u4e5f\u53ef\u4ee5\u5728\u5904\u7406\u6570\u636e\u65f6\u76f4\u63a5\u5904\u7406\u6389\uff1a<\/p>\n
\/\/...\n\nmodel_vertex = new Float32Array(modelData.vertex.flat());\nmodel_uv = new Float32Array(modelData.uv.flat());\nmodel_index = new Uint32Array(modelData.faces.flat());\n\n\/\/...<\/code><\/pre>\nUniform Data<\/h2>\n
\u7136\u540e\u5904\u7406uniform<\/strong>\u6570\u636e\uff0c\u9996\u5148\u521b\u5efa\uff1a<\/p>\n\/\/...\n\nconst uniformBuffer = device.createBuffer({\n size: 64 + 64 + 64,\n usage: GPUBufferUsage.UNIFORM | GPUBufferUsage.COPY_DST\n});\n\n\/\/...\n\nlet MODELMATRIX = mat4.create();\nlet VIEWMATRIX = mat4.create();\nlet PROJMATRIX = mat4.create();\n\nmat4.lookAt(VIEWMATRIX, [0.0, 0.0, 5.0], [0.0, 0.0, 0.0], [0.0, 1.0, 0.0]);\nmat4.identity(PROJMATRIX);\nmat4.perspective(PROJMATRIX, fovy, canvas.width \/ canvas.height, 1, 25);\n\n\/\/...<\/code><\/pre>\n\u8fd9\u91cc\u53ef\u4ee5\u5c01\u88c5\u5230\u4e4b\u524d\u7684camera<\/strong>\u4e2d\u53bb\u3002<\/p>\n\u7136\u540e\u662f\u9876\u70b9\u3001UV\u3001\u7d22\u5f15\u7684buffer<\/strong>\uff1a<\/p>\n\/\/...\n\nconst vertexBuffer = device.createBuffer({\n size: cube_vertex.byteLength,\n usage: GPUBufferUsage.VERTEX | GPUBufferUsage.COPY_DST,\n mappedAtCreation: true\n});\n\nnew Float32Array(vertexBuffer.getMappedRange()).set(cube_vertex);\n\nvertexBuffer.unmap();\n\nconst uvBuffer = device.createBuffer({\n size: cube_uv.byteLength,\n usage: GPUBufferUsage.VERTEX | GPUBufferUsage.COPY_DST,\n mappedAtCreation: true\n});\n\nnew Float32Array(uvBuffer.getMappedRange()).set(cube_uv);\n\nuvBuffer.unmap();\n\nconst indexBuffer = device.createBuffer({\n size: cube_index.byteLength,\n usage: GPUBufferUsage.INDEX | GPUBufferUsage.COPY_DST,\n mappedAtCreation: true\n});\n\nnew Uint32Array(indexBuffer.getMappedRange()).set(cube_index);\nindexBuffer.unmap();\n\n\/\/...<\/code><\/pre>\n\u7ba1\u7ebf<\/h2>\n
\u63a5\u7740\u5904\u7406\u7ba1\u7ebf\uff1a<\/p>\n
const pipeline = device.createRenderPipeline({\n vertex: {\n module: device.createShaderModule({\n code: shaderVertexCode,\n }),\n entryPoint: "main",\n buffers: [{\n arrayStride: 4 * 3,\n attributes: [{\n shaderLocation: 0,\n format: "float32x3",\n offset: 0\n }]\n },\n {\n arrayStride: 4 * 2,\n attributes: [{\n shaderLocation: 1,\n format: "float32x2",\n offset: 0\n }]\n }\n ]\n },\n fragment: {\n module: device.createShaderModule({\n code: shaderFragmentCode,\n }),\n entryPoint: "main",\n targets: [{\n format: format,\n },],\n },\n primitive: {\n topology: "triangle-list",\n frontFace: "ccw",\n cullMode: "back"\n },\n depthStencil: {\n format: "depth24plus",\n depthWriteEnabled: true,\n depthCompare: "less"\n }\n});<\/code><\/pre>\n\u7ed1\u5b9a\u7ec4<\/h2>\n\/\/...\n\nconst uniformBindGroup = device.createBindGroup({\n layout: pipeline.getBindGroupLayout(0),\n entries: [{\n binding: 0,\n resource: {\n buffer: uniformBuffer,\n offset: 0,\n size: 64 + 64 + 64\n }\n },\n ]\n});\n\n\/\/...<\/code><\/pre>\n\u7eb9\u7406<\/h2>\n
\u4f46\u662f\uff0c\u8fd9\u79cd\u52a0\u8f7d\u53ea\u6709\u6a21\u578b\uff0c\u6ca1\u6709\u7eb9\u7406\uff0c\u53ef\u4ee5\u52a0\u8f7d\u7eb9\u7406\uff1a<\/p>\n
\/\/...\n\nlet img: any = new Image();\nimg.src = 'https:\/\/hungking.cc\/xxxxxx.png';\nimg.crossOrigin = true;\nawait img.decode();\n\nconst imageBitmap = await createImageBitmap(img);\n\nconst sampler = device.createSampler({\n minFilter: 'linear',\n magFilter: 'linear',\n addressModeU: 'repeat',\n addressModeV: 'repeat'\n});\n\nconst texture = device.createTexture({\n size: [imageBitmap.width, imageBitmap.height, 1],\n format: 'rgba8unorm',\n usage: GPUTextureUsage.TEXTURE_BINDING |\n GPUTextureUsage.COPY_DST |\n GPUTextureUsage.RENDER_ATTACHMENT\n});\n\ndevice.queue.copyExternalImageToTexture({ source: imageBitmap }, { texture: texture }, [imageBitmap.width, imageBitmap.height]);<\/code><\/pre>\n\u7eb9\u7406\u53ef\u4ee5\u81ea\u884c\u8c03\u6574\uff0c\u6bd4\u5982\uff1a<\/p>\n
const sampler = device.createSampler({\n \/\/...\n mipmapFilter : "nearest",\n \/\/...\n});<\/code><\/pre>\n\u5c06\u7eb9\u7406\u7ed1\u5b9a\u5230\u7ec4\uff1a<\/p>\n
const uniformBindGroup = device.createBindGroup({\n \/\/...\n\n {\n binding: 1,\n resource: sampler\n },\n {\n binding: 2,\n resource: texture.createView()\n }\n\n \/\/...\n});<\/code><\/pre>\n\u961f\u5217<\/h2>\n
\u4e4b\u540e\u6240\u6709\u7684\u64cd\u4f5c\u90fd\u8981\u63d0\u4ea4\u5230\u961f\u5217\u4e2d\uff0c\u6bd4\u5982\uff1a<\/p>\n
\/\/...\n\ndevice.queue.writeBuffer(uniformBuffer, 0, PROJMATRIX);\ndevice.queue.writeBuffer(uniformBuffer, 64, VIEWMATRIX);\ndevice.queue.writeBuffer(uniformBuffer, 64 + 64, MODELMATRIX);\n\n\/\/...<\/code><\/pre>\ncommandEncoder\u548cDraw<\/h2>\n
\u63a5\u7740\u662f\u501f\u9274Apple\u8bbe\u8ba1\u4e2d\u7684commandEncoder<\/strong>\uff0c\u7136\u540e\u662f\u6e32\u67d3\uff0c\u6700\u540e\u589e\u52a0\u4ea4\u4e92\uff0c\u4e4b\u524d\u5df2\u7ecf\u7b80\u5355\u63d0\u8fc7\uff0c\u8fd9\u91cc\u4e0d\u518d\u8d58\u8ff0\u3002<\/p>\n\/\/...\n\nmat4.rotateY(MODELMATRIX, MODELMATRIX, ly);\nmat4.rotateX(MODELMATRIX, MODELMATRIX, lx);\ndevice.queue.writeBuffer(uniformBuffer, 64 + 64, MODELMATRIX);\n\nconst commandEncoder = device.createCommandEncoder();\ntextureView = context.getCurrentTexture().createView();\nrenderPassDescription.colorAttachments[0].view = textureView;\n\nconst renderPass = commandEncoder.beginRenderPass(renderPassDescription);\n\nrenderPass.setPipeline(pipeline);\nrenderPass.setVertexBuffer(0, vertexBuffer);\nrenderPass.setVertexBuffer(1, uvBuffer);\nrenderPass.setIndexBuffer(indexBuffer, "uint32");\nrenderPass.setBindGroup(0, uniformBindGroup);\nrenderPass.drawIndexed(cube_index.length);\nrenderPass.end();\n\ndevice.queue.submit([commandEncoder.finish()]);\n\n\/\/...<\/code><\/pre>\n\u76ee\u524d\u6839\u636e\u65b0\u7684\u6807\u51c6\uff0c\u90e8\u5206\u53c2\u6570\u5df2\u7ecf\u5f03\u7528\u6216\u6539\u6210\u5176\u4ed6\u53c2\u6570\u4e86\uff0c\u6bd4\u5982\uff1a<\/p>\n
\/\/..\n\nlet textureView = context.getCurrentTexture().createView();\n\nlet depthTexture = device.createTexture({\n size: [canvas.clientWidth * devicePixelRatio, canvas.clientHeight * devicePixelRatio, 1],\n format: "depth24plus",\n usage: GPUTextureUsage.RENDER_ATTACHMENT\n});\n\n\/\/...\n\nconst renderPassDescription = {\n colorAttachments: [{\n view: textureView,\n loadValue: { r: 0.5, g: 0.5, b: 0.5, a: 1.0 },\n clearValue: { r: 0.5, g: 0.5, b: 0.5, a: 1.0 },\n loadValue: { r: 0.5, g: 0.5, b: 0.5, a: 1.0 },\n loadOp: "load",\n storeOp: "store",\n },],\n depthStencilAttachment: {\n view: depthTexture.createView(),\n depthLoadValue: 1.0,\n depthLoadOp: "clear",\n depthClearValue: 1.0,\n depthStoreOp: "store",\n stencilLoadValue: 0,\n stencilStoreOp: "store",\n stencilLoadOp: "clear"\n }\n};\n\n\/\/...<\/code><\/pre>\n\u5728renderPassDescription<\/em>\u4e2d\uff1astencilLoadValue<\/em>\u3001stencilStoreOp<\/em>\u3001stencilLoadOp<\/em>\uff0c\u5982\u679c\u4e3a\u4e86\u517c\u5bb9\u76ee\u524d\u6b63\u5f0f\u7248\u7684\u6d4f\u89c8\u5668\u53ef\u4ee5\u505a\u7ee7\u7eed\u4f7f\u7528\uff0c\u4f46\u5efa\u8bae\u5c3d\u91cf\u6839\u636e\u6d4f\u89c8\u5668\u517c\u5bb9\uff0c\u8fd9\u91cc\u4e0d\u518d\u6f14\u793a\u3002<\/p>\n\u6ce8\u610f\uff1a\u4f8b\u5b50\u4e2d\u7684\u65b9\u6cd5\u548c\u5c5e\u6027\u53ef\u80fd\u968f\u65f6\u8c03\u6574\uff0c\u5177\u4f53\u4f7f\u7528\u8bf7\u53c2\u8003W3C\u7684\u5b98\u65b9\u6587\u6863<\/a><\/em><\/p>\n\u6548\u679c\u9884\u89c8\u5730\u5740\uff0c\u968f\u4fbf\u8d34\u4e86\u5f20\ud83d\udc38\u7684\uff1a<\/p>\n
\u52a0\u8f7d\u6a21\u578b<\/a><\/p>\n![\"\u52a0\u8f7d\u6a21\u578b\"](\"https:\/\/hungking.cc\/assets\/imgs\/indeex.cc\/WebGPUWGSLbase4.gif\")
<\/p>\n
code enjoy! \ud83e\udd96\ud83e\udd96\ud83e\udd96<\/p>\n
\u4f5c\u8005\uff1aindeex <\/p>\n
\u94fe\u63a5\uff1ahttps:\/\/indeex.club<\/a> <\/p>\n\u8457\u4f5c\u6743\u5f52\u4f5c\u8005\u6240\u6709\u3002\u5546\u4e1a\u8f6c\u8f7d\u8bf7\u8054\u7cfb\u4f5c\u8005\u83b7\u5f97\u6388\u6743\uff0c\u975e\u5546\u4e1a\u8f6c\u8f7d\u8bf7\u6ce8\u660e\u51fa\u5904\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5728WebGPU\u5f00\u53d1\u4e2d\uff0c\u4f1a\u52a0\u8f7d\u5404\u79cd\u5404\u6837\u7684\u6a21\u578b\uff0c \u4e0b\u8f7d\u6a21\u578b \u8fd9\u91cc\u4ee5\u901a\u7528OBJ\u6a21\u578b\u4e3a\u4f8b\uff0c\u9996\u5148\u662f\u52a0\u8f7d\u6587\u4ef6\uff1a Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[10],"tags":[15],"_links":{"self":[{"href":"https:\/\/blog.indeex.club\/index.php\/wp-json\/wp\/v2\/posts\/280"}],"collection":[{"href":"https:\/\/blog.indeex.club\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.indeex.club\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.indeex.club\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.indeex.club\/index.php\/wp-json\/wp\/v2\/comments?post=280"}],"version-history":[{"count":2,"href":"https:\/\/blog.indeex.club\/index.php\/wp-json\/wp\/v2\/posts\/280\/revisions"}],"predecessor-version":[{"id":284,"href":"https:\/\/blog.indeex.club\/index.php\/wp-json\/wp\/v2\/posts\/280\/revisions\/284"}],"wp:attachment":[{"href":"https:\/\/blog.indeex.club\/index.php\/wp-json\/wp\/v2\/media?parent=280"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.indeex.club\/index.php\/wp-json\/wp\/v2\/categories?post=280"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.indeex.club\/index.php\/wp-json\/wp\/v2\/tags?post=280"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}