19854902 319854902 319854902 319854902 webgpu交Q流群
我们找个例子看看别人的renderer three.js v152
首先init函数
看见中间有个对象 WebGPURenderPipelines
跟进去看看
这个构造函数里可以看见有这么些数据
get( renderObject ) {const device = this.device;const cache = this._getCache( renderObject );let currentPipeline = cache.currentPipeline;if ( this._needsUpdate( renderObject ) ) {// release previous cachethis._releasePipeline( renderObject );// get shaderconst nodeBuilder = this.nodes.get( renderObject );// programmable stageslet stageVertex = this.stages.vertex.get( nodeBuilder.vertexShader );if ( stageVertex === undefined ) {stageVertex = new WebGPUProgrammableStage( device, nodeBuilder.vertexShader, 'vertex' );this.stages.vertex.set( nodeBuilder.vertexShader, stageVertex );}let stageFragment = this.stages.fragment.get( nodeBuilder.fragmentShader );if ( stageFragment === undefined ) {stageFragment = new WebGPUProgrammableStage( device, nodeBuilder.fragmentShader, 'fragment' );this.stages.fragment.set( nodeBuilder.fragmentShader, stageFragment );}// determine render pipelinecurrentPipeline = this._acquirePipeline( stageVertex, stageFragment, renderObject );cache.currentPipeline = currentPipeline;// keep track of all used timescurrentPipeline.usedTimes ++;stageVertex.usedTimes ++;stageFragment.usedTimes ++;}return currentPipeline;}
首先会从cache里找找current pipeline
然后看看是不是需要update，然后需要更新就把原来的pipeline删了，重新构建一个，放进cache
结束
remove dispose比较简单
_acquirePipeline就是把shader啥的作为参数构建新的pipeline
_computeCacheKey就是计算key
大概就这些关键信息
继续看renderer
很多函数名和Webgl一样的， 比如getClearAlpha啥的，这些行为都和以前一样的
接下来 render函数
先把几个特别的东西update一下
然后这个是把通过裁剪判断的物体收集一下，再排序一下
东西收集好了，要开始了，但是有点长，下次继续
19854902 319854902 319854902 319854902 webgpu交Q流群
