移动skill位置

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+# TSL Post-Processing
+
+Post-processing applies effects to the rendered image. TSL provides both built-in effects and the ability to create custom effects.
+
+## Basic Setup
+
+```javascript
+import * as THREE from 'three/webgpu';
+import { pass } from 'three/tsl';
+
+// Create renderer
+const renderer = new THREE.WebGPURenderer();
+await renderer.init();
+
+// Create post-processing
+const postProcessing = new THREE.PostProcessing(renderer);
+
+// Create scene pass
+const scenePass = pass(scene, camera);
+const scenePassColor = scenePass.getTextureNode('output');
+
+// Output (passthrough)
+postProcessing.outputNode = scenePassColor;
+
+// Render with post-processing
+function animate() {
+  postProcessing.render();  // Not renderer.render()
+}
+```
+
+## Built-in Effects
+
+### Bloom
+
+```javascript
+import { bloom } from 'three/addons/tsl/display/BloomNode.js';
+
+const scenePass = pass(scene, camera);
+const scenePassColor = scenePass.getTextureNode('output');
+
+// Add bloom
+const bloomPass = bloom(scenePassColor);
+
+// Configure
+bloomPass.threshold.value = 0.5;   // Brightness threshold
+bloomPass.strength.value = 1.0;    // Bloom intensity
+bloomPass.radius.value = 0.5;      // Blur radius
+
+// Combine original + bloom
+postProcessing.outputNode = scenePassColor.add(bloomPass);
+```
+
+### Gaussian Blur
+
+```javascript
+import { gaussianBlur } from 'three/addons/tsl/display/GaussianBlurNode.js';
+
+const blurred = gaussianBlur(scenePassColor, vec2(2.0)); // Blur strength
+postProcessing.outputNode = blurred;
+```
+
+### FXAA (Anti-aliasing)
+
+```javascript
+import { fxaa } from 'three/addons/tsl/display/FXAANode.js';
+
+postProcessing.outputNode = fxaa(scenePassColor);
+```
+
+### SMAA (Anti-aliasing)
+
+```javascript
+import { smaa } from 'three/addons/tsl/display/SMAANode.js';
+
+postProcessing.outputNode = smaa(scenePassColor);
+```
+
+### Depth of Field
+
+```javascript
+import { dof } from 'three/addons/tsl/display/DepthOfFieldNode.js';
+
+const scenePass = pass(scene, camera);
+const colorNode = scenePass.getTextureNode('output');
+const depthNode = scenePass.getTextureNode('depth');
+
+const dofPass = dof(colorNode, depthNode, {
+  focus: 5.0,      // Focus distance
+  aperture: 0.025, // Aperture size
+  maxblur: 0.01    // Maximum blur
+});
+
+postProcessing.outputNode = dofPass;
+```
+
+### Motion Blur
+
+```javascript
+import { motionBlur } from 'three/addons/tsl/display/MotionBlurNode.js';
+
+const scenePass = pass(scene, camera);
+const velocityPass = scenePass.getTextureNode('velocity');
+
+const motionBlurPass = motionBlur(scenePassColor, velocityPass);
+postProcessing.outputNode = motionBlurPass;
+```
+
+### Screen Space Reflections (SSR)
+
+```javascript
+import { ssr } from 'three/addons/tsl/display/SSRNode.js';
+
+const scenePass = pass(scene, camera);
+const colorNode = scenePass.getTextureNode('output');
+const depthNode = scenePass.getTextureNode('depth');
+const normalNode = scenePass.getTextureNode('normal');
+
+const ssrPass = ssr(colorNode, depthNode, normalNode, camera);
+postProcessing.outputNode = ssrPass;
+```
+
+### Ambient Occlusion (SSAO)
+
+```javascript
+import { ao } from 'three/addons/tsl/display/AmbientOcclusionNode.js';
+
+const scenePass = pass(scene, camera);
+const depthNode = scenePass.getTextureNode('depth');
+const normalNode = scenePass.getTextureNode('normal');
+
+const aoPass = ao(depthNode, normalNode, camera);
+postProcessing.outputNode = scenePassColor.mul(aoPass);
+```
+
+### Film Grain
+
+```javascript
+import { film } from 'three/addons/tsl/display/FilmNode.js';
+
+const filmPass = film(scenePassColor, {
+  intensity: 0.5,
+  grayscale: false
+});
+postProcessing.outputNode = filmPass;
+```
+
+### Outline
+
+```javascript
+import { outline } from 'three/addons/tsl/display/OutlineNode.js';
+
+const outlinePass = outline(scene, camera, selectedObjects, {
+  edgeStrength: 3.0,
+  edgeGlow: 0.0,
+  edgeThickness: 1.0,
+  visibleEdgeColor: new THREE.Color(0xffffff),
+  hiddenEdgeColor: new THREE.Color(0x190a05)
+});
+
+postProcessing.outputNode = scenePassColor.add(outlinePass);
+```
+
+### Chromatic Aberration
+
+```javascript
+import { chromaticAberration } from 'three/addons/tsl/display/ChromaticAberrationNode.js';
+
+const caPass = chromaticAberration(scenePassColor, {
+  offset: vec2(0.002, 0.002)
+});
+postProcessing.outputNode = caPass;
+```
+
+## Color Adjustments
+
+### Grayscale
+
+```javascript
+import { grayscale } from 'three/tsl';
+
+postProcessing.outputNode = grayscale(scenePassColor);
+```
+
+### Saturation
+
+```javascript
+import { saturation } from 'three/tsl';
+
+// 0 = grayscale, 1 = normal, 2 = oversaturated
+postProcessing.outputNode = saturation(scenePassColor, 1.5);
+```
+
+### Hue Shift
+
+```javascript
+import { hue } from 'three/tsl';
+
+// Shift hue by radians
+postProcessing.outputNode = hue(scenePassColor, time.mul(0.5));
+```
+
+### Vibrance
+
+```javascript
+import { vibrance } from 'three/tsl';
+
+postProcessing.outputNode = vibrance(scenePassColor, 0.5);
+```
+
+### Posterize
+
+```javascript
+import { posterize } from 'three/tsl';
+
+// Reduce color levels
+postProcessing.outputNode = posterize(scenePassColor, 8);
+```
+
+### Sepia
+
+```javascript
+import { sepia } from 'three/addons/tsl/display/SepiaNode.js';
+
+postProcessing.outputNode = sepia(scenePassColor);
+```
+
+### 3D LUT
+
+```javascript
+import { lut3D } from 'three/addons/tsl/display/Lut3DNode.js';
+
+const lutTexture = new THREE.Data3DTexture(lutData, size, size, size);
+postProcessing.outputNode = lut3D(scenePassColor, lutTexture, size);
+```
+
+## Custom Post-Processing
+
+### Basic Custom Effect
+
+```javascript
+import { Fn, screenUV, float, vec4 } from 'three/tsl';
+
+const customEffect = Fn(() => {
+  const color = scenePassColor.toVar();
+
+  // Invert colors
+  color.rgb.assign(float(1.0).sub(color.rgb));
+
+  return color;
+});
+
+postProcessing.outputNode = customEffect();
+```
+
+### Vignette Effect
+
+```javascript
+const vignette = Fn(() => {
+  const color = scenePassColor.toVar();
+
+  // Distance from center
+  const uv = screenUV;
+  const dist = uv.sub(0.5).length();
+
+  // Vignette falloff
+  const vignette = float(1.0).sub(dist.mul(1.5)).clamp(0, 1);
+
+  color.rgb.mulAssign(vignette);
+  return color;
+});
+
+postProcessing.outputNode = vignette();
+```
+
+### CRT/Scanline Effect
+
+```javascript
+import { viewportSharedTexture } from 'three/tsl';
+
+const crtEffect = Fn(() => {
+  const uv = screenUV;
+
+  // Sample scene at offset UVs for RGB separation (chromatic aberration)
+  const uvR = uv.add(vec2(0.002, 0));
+  const uvG = uv;
+  const uvB = uv.sub(vec2(0.002, 0));
+
+  // Use viewportSharedTexture to sample at different UV coordinates
+  const r = viewportSharedTexture(uvR).r;
+  const g = viewportSharedTexture(uvG).g;
+  const b = viewportSharedTexture(uvB).b;
+
+  const color = vec4(r, g, b, 1.0).toVar();
+
+  // Scanlines
+  const scanline = uv.y.mul(screenSize.y).mul(0.5).sin().mul(0.1).add(0.9);
+  color.rgb.mulAssign(scanline);
+
+  // Vignette
+  const dist = uv.sub(0.5).length();
+  color.rgb.mulAssign(float(1.0).sub(dist.mul(0.5)));
+
+  return color;
+});
+
+// Note: For this effect, apply after scene rendering
+postProcessing.outputNode = crtEffect();
+```
+
+### Pixelate Effect
+
+```javascript
+const pixelSize = uniform(8.0);
+
+const pixelate = Fn(() => {
+  const uv = screenUV;
+  const pixelUV = uv.mul(screenSize).div(pixelSize).floor().mul(pixelSize).div(screenSize);
+  return texture(scenePassColor, pixelUV);
+});
+
+postProcessing.outputNode = pixelate();
+```
+
+### Edge Detection (Sobel)
+
+```javascript
+const sobelEdge = Fn(() => {
+  const uv = screenUV;
+  const texelSize = vec2(1.0).div(screenSize);
+
+  // Sample 3x3 kernel
+  const tl = luminance(texture(scenePassColor, uv.add(texelSize.mul(vec2(-1, -1)))));
+  const tc = luminance(texture(scenePassColor, uv.add(texelSize.mul(vec2(0, -1)))));
+  const tr = luminance(texture(scenePassColor, uv.add(texelSize.mul(vec2(1, -1)))));
+  const ml = luminance(texture(scenePassColor, uv.add(texelSize.mul(vec2(-1, 0)))));
+  const mr = luminance(texture(scenePassColor, uv.add(texelSize.mul(vec2(1, 0)))));
+  const bl = luminance(texture(scenePassColor, uv.add(texelSize.mul(vec2(-1, 1)))));
+  const bc = luminance(texture(scenePassColor, uv.add(texelSize.mul(vec2(0, 1)))));
+  const br = luminance(texture(scenePassColor, uv.add(texelSize.mul(vec2(1, 1)))));
+
+  // Sobel operators
+  const gx = tl.add(ml.mul(2)).add(bl).sub(tr).sub(mr.mul(2)).sub(br);
+  const gy = tl.add(tc.mul(2)).add(tr).sub(bl).sub(bc.mul(2)).sub(br);
+
+  const edge = sqrt(gx.mul(gx).add(gy.mul(gy)));
+
+  return vec4(vec3(edge), 1.0);
+});
+
+postProcessing.outputNode = sobelEdge();
+```
+
+## Multiple Render Targets (MRT)
+
+Access multiple buffers from the scene pass:
+
+```javascript
+import { mrt, output } from 'three/tsl';
+
+const scenePass = pass(scene, camera);
+
+// Set up MRT
+scenePass.setMRT(mrt({
+  output: output,           // Color output
+  normal: normalView,       // View-space normals
+  depth: depth              // Depth buffer
+}));
+
+// Access individual targets
+const colorTexture = scenePass.getTextureNode('output');
+const normalTexture = scenePass.getTextureNode('normal');
+const depthTexture = scenePass.getTextureNode('depth');
+```
+
+### Selective Bloom with MRT
+
+Bloom only emissive objects by rendering emissive to a separate target:
+
+```javascript
+import { pass, mrt, output, emissive } from 'three/tsl';
+import { bloom } from 'three/addons/tsl/display/BloomNode.js';
+
+const postProcessing = new THREE.PostProcessing(renderer);
+const scenePass = pass(scene, camera);
+
+// Render both color and emissive to separate targets
+scenePass.setMRT(mrt({
+  output: output,
+  emissive: emissive
+}));
+
+// Get the texture nodes
+const colorTexture = scenePass.getTextureNode('output');
+const emissiveTexture = scenePass.getTextureNode('emissive');
+
+// Apply bloom only to emissive
+const bloomPass = bloom(emissiveTexture);
+bloomPass.threshold.value = 0.0;  // Bloom all emissive
+bloomPass.strength.value = 1.5;
+bloomPass.radius.value = 0.5;
+
+// Combine: original color + bloomed emissive
+postProcessing.outputNode = colorTexture.add(bloomPass);
+```
+
+This approach prevents non-emissive bright areas (like white surfaces) from blooming.
+
+## Chaining Effects
+
+```javascript
+const scenePass = pass(scene, camera);
+const color = scenePass.getTextureNode('output');
+
+// Chain multiple effects
+let output = color;
+
+// 1. Apply bloom
+const bloomPass = bloom(output);
+output = output.add(bloomPass.mul(0.5));
+
+// 2. Apply color grading
+output = saturation(output, 1.2);
+
+// 3. Apply vignette
+const dist = screenUV.sub(0.5).length();
+const vignette = float(1.0).sub(dist.mul(0.5));
+output = output.mul(vignette);
+
+// 4. Apply FXAA
+output = fxaa(output);
+
+postProcessing.outputNode = output;
+```
+
+## Conditional Effects
+
+```javascript
+const effectEnabled = uniform(true);
+
+const conditionalEffect = Fn(() => {
+  const color = scenePassColor;
+  return select(effectEnabled, grayscale(color), color);
+});
+
+postProcessing.outputNode = conditionalEffect();
+
+// Toggle at runtime
+effectEnabled.value = false;
+```
+
+## Transitions
+
+```javascript
+import { transition } from 'three/addons/tsl/display/TransitionNode.js';
+
+const scenePassA = pass(sceneA, camera);
+const scenePassB = pass(sceneB, camera);
+
+const transitionProgress = uniform(0);
+
+const transitionPass = transition(
+  scenePassA.getTextureNode('output'),
+  scenePassB.getTextureNode('output'),
+  transitionProgress,
+  texture(transitionTexture)  // Optional transition texture
+);
+
+postProcessing.outputNode = transitionPass;
+
+// Animate transition
+function animate() {
+  transitionProgress.value = Math.sin(time) * 0.5 + 0.5;
+  postProcessing.render();
+}
+```