轻量封装WebGPU渲染系统示例＜25＞- 颜色附件数据更新替换(源码)

当前示例源码github地址:

https://github.com/vilyLei/voxwebgpu/blob/feature/rendering/src/voxgpu/sample/ColorAttachmentReplace.ts

此示例基于此渲染系统实现，当前示例TypeScript源码如下:

const rttTex0 = { diffuse: { uuid: 'rtt0', rttTexture: {} } };
const rttTex1 = { diffuse: { uuid: 'rtt1', rttTexture: {} } };
const attachment0 = {texture: rttTex0,clearValue: [] as ColorDataType,loadOp: "clear",storeOp: "store"
} as WGRPassColorAttachment;
const attachment1 = {texture: rttTex1,clearValue: [] as ColorDataType,
} as WGRPassColorAttachment;
const colorAttachments: WGRPassColorAttachment[] = [attachment0];class PassGraph extends WGRPassNodeGraph {private mTimes = 0;constructor() { super(); }runBegin(): void {super.runBegin();}run(): void {this.mTimes++;if (this.mTimes == 50) {const replaceColorAttachment = true;if (replaceColorAttachment) {// replace color attachmentattachment1.clearValue = [0.2, 0.5, 0.2];colorAttachments[0] = attachment1;} else {// replace texturecolorAttachments[0].texture = rttTex1;}}let pass = this.passes[0];for (let i = 0; i < 1; ++i) {pass.colorAttachments[0].clearEnabled = i < 1;pass.render();}}
}export class ColorAttachmentReplace {private mRscene = new RendererScene();initialize(): void {console.log("ColorAttachmentReplace::initialize() ...");let multisampleEnabled = true;let depthTestEnabled = false;let rpassparam = { multisampleEnabled, depthTestEnabled };this.mRscene.initialize({ rpassparam });this.initEvent();this.initScene();}private mGraph = new PassGraph();private applyRTTPass(clearColor: ColorDataType, extent = [0.4, 0.3, 0.5, 0.5]): void {let rs = this.mRscene;const graph = this.mGraph;attachment0.clearValue = clearColor;attachment1.clearValue = clearColor;let rPass = rs.renderer.appendRenderPass({ separate: true, colorAttachments });const diffuseTex = { diffuse: { url: "static/assets/huluwa.jpg", flipY: true } };let rttEntity = new FixScreenPlaneEntity({ extent: [-0.8, -0.8, 1.6, 1.6], textures: [diffuseTex] });rPass.addEntity(rttEntity);graph.passes = [rPass];rs.setPassNodeGraph(graph);let entity = new FixScreenPlaneEntity({ extent, flipY: true, textures: [rttTex0] });rs.addEntity(entity);extent = [-0.9, -0.9, 1.2, 1.2];entity = new FixScreenPlaneEntity({ extent, flipY: true, textures: [rttTex1] });rs.addEntity(entity);}private initEvent(): void {const rs = this.mRscene;new MouseInteraction().initialize(rs, 0, false).setAutoRunning(true);}private initScene(): void {this.applyRTTPass([0.1, 0.1, 0.1, 1.0], [-0.8, -0.8, 1.6, 1.6]);}run(): void {this.mRscene.run();}
}