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step1. 通过mrt机制#xff0c;输出颜色和深度相关数据的两张rtt纹理。
step2. 基于上述颜色纹理#xff0c;生成一张模糊之后的新rtt纹理。
setp3. 基于深度(也就是距离摄像机的远近)数据#xff0c;合成颜色和模糊纹理数据#xff0c;并最终输出。
当前示例…实现方式:
step1. 通过mrt机制输出颜色和深度相关数据的两张rtt纹理。
step2. 基于上述颜色纹理生成一张模糊之后的新rtt纹理。
setp3. 基于深度(也就是距离摄像机的远近)数据合成颜色和模糊纹理数据并最终输出。
当前示例源码github地址:
https://github.com/vilyLei/voxwebgpu/blob/feature/rendering/src/voxgpu/sample/DepthBlur.ts
当前示例运行效果: 微调一点代码即可获得下述效果 代码微调方式: 第一处, 将下述片段着色器中的 f 1.0 - f * f; 改为 f f * f; 第二处, 将
const attachment1 {texture: vposRTTTex,clearValue: [0.2, 0.25, 0.2, 1.0]}; 改为
const attachment1 {texture: vposRTTTex,clearValue: [800, 800, 800, 1]};
当然也可以通过第四个分量来做实际的区分参数统一处理。
合成模糊效果的WGSL片段着色器代码
group(0) binding(0) varuniform param: vec4f;
group(0) binding(1) var colorSampler0: sampler;
group(0) binding(2) var colorTexture0: texture_2df32;
group(0) binding(3) var blurSampler1: sampler;
group(0) binding(4) var blurTexture1: texture_2df32;
group(0) binding(5) var vposSampler1: sampler;
group(0) binding(6) var vposTexture1: texture_2df32;fn calcColor(uv: vec2f) - vec4f {var color textureSample(colorTexture0, colorSampler0, uv) * param;var blurColor textureSample(blurTexture1, blurSampler1, uv);var vpos textureSample(vposTexture1, vposSampler1, uv);var f clamp((length(vpos.xyz) - 300.0)/200.0, 0.0, 1.0);f 1.0 - f * f;var result vec4f(color.xyz * (1.0 - f) f * blurColor.xyz, 1.0);return result;
}fragment
fn main(location(0) uv: vec2f) - location(0) vec4f {var color4 calcColor( uv );return color4;
}此示例基于此渲染系统实现当前示例TypeScript源码如下:
const blurRTTTex0 { diffuse: { uuid: rtt0, rttTexture: {} } };
const blurRTTTex1 { diffuse: { uuid: rtt1, rttTexture: {} } };
const rtts [blurRTTTex0, blurRTTTex1];
const attachment {texture: blurRTTTex0,clearValue: [] as ColorDataType,loadOp: clear,storeOp: store
} as WGRPassColorAttachment;
const colorAttachments [attachment];const colorRTTTex { diffuse: { uuid: colorRTT, rttTexture: {} } };
const vposRTTTex { diffuse: { uuid: floatRTT, rttTexture: {}, format: rgba16float } };class PassGraph extends WGRPassNodeGraph {blurEntity: FixScreenPlaneEntity;srcEntity: FixScreenPlaneEntity;constructor() {super();}run(): void {let pass this.passes[0];const entity this.blurEntity;let ms entity.materials;for (let i 0; i 11; i) {const ia i % 2;const ib (i 1) % 2;pass.colorAttachments[0].clearEnabled i 1;this.srcEntity.visible i 1;this.blurEntity.visible i 0;attachment.texture rtts[ia];ms[ia].visible false;ms[ib].visible true;pass.render();}}
}export class DepthBlur {private mRscene new RendererScene();private mGraph new PassGraph();private uniformValues [{ data: new Float32Array([512, 512, 3.0, 0]) }];initialize(): void {let multisampleEnabled true;let depthTestEnabled false;let rpassparam { multisampleEnabled, depthTestEnabled };this.mRscene.initialize({ rpassparam });this.initEvent();this.initScene();}private initEvent(): void {const rc this.mRscene;rc.addEventListener(MouseEvent.MOUSE_DOWN, this.mouseDown);new MouseInteraction().initialize(rc, 0, false).setAutoRunning(true);}private mouseDown (evt: MouseEvent): void {}private createMaterial(shadinguuid: string, textures: WGTextureDataDescriptor[], type: number): WGMaterial {let shaderCodeSrc {vert: { code: vertWGSL, uuid: vert },frag: { code: type 0 ? blurVWGSL : blurHWGSL, uuid: frag }};shadinguuid - type;let pipelineDefParam {depthWriteEnabled: false};const material new WGMaterial({shadinguuid,shaderCodeSrc,pipelineDefParam});material.uniformValues this.uniformValues;material.addTextures(textures);return material;}private applyBlurPass(clearColor: ColorDataType, extent: number[]): void {let rs this.mRscene;const graph this.mGraph;attachment.clearValue clearColor;let rPass rs.createRenderPass({ separate: true, colorAttachments });graph.passes [rPass];let materials [this.createMaterial(shd-00, [blurRTTTex0], 0), this.createMaterial(shd-01, [blurRTTTex1], 1)];let rttEntity new FixScreenPlaneEntity({ extent: [-1, -1, 2, 2], flipY: true, textures: [colorRTTTex] });rttEntity.uuid src-entity;rPass.addEntity(rttEntity);graph.srcEntity rttEntity;rs.setPassNodeGraph(graph);let entity new FixScreenPlaneEntity({ extent, flipY: true, materials });entity.materials[0].visible false;entity.uuid blur-entity;rPass.addEntity(entity);graph.blurEntity entity;let shaderSrc {vert: { code: vertWGSL, uuid: vert },frag: { code: depthBlurFragWGSL, uuid: depthBlur }};// display blur rendering resultlet textures [colorRTTTex, blurRTTTex0, vposRTTTex];extent [-0.8, -0.8, 1.6, 1.6];entity new FixScreenPlaneEntity({ extent, flipY: false, shaderSrc, textures, shadinguuid: smallImgMaterial });rs.addEntity(entity);}private applyMRTPass(extent: number[]): void {let rs this.mRscene;const attachment0 {texture: colorRTTTex,clearValue: [0.15, 0.15, 0.15, 1.0]};const attachment1 {texture: vposRTTTex,clearValue: [0.2, 0.25, 0.2, 1.0]};const colorAttachments [attachment0, attachment1];let rPass rs.createRenderPass({ separate: true, colorAttachments });let shaderSrc {vert: { code: entityVertWGSL, uuid: vertMRT },frag: { code: entityFragWGSL, uuid: fragMRT }};let torus new TorusEntity({shaderSrc, radius: 150});torus.setAlbedo([0.7,0.02,0.1]);rPass.addEntity(torus);shaderSrc {vert: { code: vertWGSL, uuid: vert },frag: { code: vposReadFragWGSL, uuid: readNromal }};// display depth value drawing resultextent [-0.95, -0.95, 0.6, 0.6];let entity new FixScreenPlaneEntity({ extent, shaderSrc, textures: [vposRTTTex], shadinguuid: readDepth });rs.addEntity(entity);// display albedo drawing resultextent [-0.33, -0.95, 0.6, 0.6];entity new FixScreenPlaneEntity({ extent, textures: [colorRTTTex] });rs.addEntity(entity);// display blur drawing resultextent [0.3, -0.95, 0.6, 0.6];entity new FixScreenPlaneEntity({ extent, textures: [blurRTTTex0] });rs.addEntity(entity);}private initScene(): void {this.applyBlurPass([0.0, 0.0, 0.03, 1.0], [-1, -1, 2, 2]);this.applyMRTPass( [-1, -1, 2, 2] );}run(): void {this.mRscene.run();}
}
