Question

我正在尝试使用SSAO后处理着色器渲染场景。没有任何错误，但我看不到使用和不使用SSAO传递渲染的场景之间的任何差异。我像这样初始化渲染器：

// Create WebGL Renderer
var renderParameters = { antialias: false, alpha: false, clearColor: 0xFFFFFF };
renderer = new THREE.WebGLRenderer(renderParameters);
renderer.autoClear = false;
renderer.setSize(viewportWidth, viewportHeight);

// Create render targets
renderTargetParametersRGB = { minFilter: THREE.LinearFilter, magFilter: THREE.LinearFilter, format: THREE.RGBFormat };
renderTargetParametersRGBA = { minFilter: THREE.LinearFilter, magFilter: THREE.LinearFilter, format: THREE.RGBAFormat };
depthTarget = new THREE.WebGLRenderTarget(width, height, renderTargetParametersRGBA);
colorTarget = new THREE.WebGLRenderTarget(width, height, renderTargetParametersRGB);

// The shader pass to draw the scene
var renderScenePass = new THREE.RenderPass(scene, camera);

// Copy to screen render pass
var copyToScreenPass = new THREE.ShaderPass(THREE.CopyShader);
copyToScreenPass.renderToScreen = true;

// SSAO render pass
effectSSAO = new THREE.ShaderPass(THREE.SSAOShader);
effectSSAO.uniforms['tDepth'].texture = depthTarget;
effectSSAO.uniforms['size'].value.set(width, height);
effectSSAO.uniforms['cameraNear'].value = camera.near; // 1
effectSSAO.uniforms['cameraFar'].value = camera.far;  // 1000
//effectSSAO.uniforms.onlyAO.value = 1;

// Setup post processing chain
composer = new THREE.EffectComposer(renderer, colorTarget);
composer.addPass(effectSSAO);
composer.addPass(copyToScreenPass); 

// Depth pass
depthPassPlugin = new THREE.DepthPassPlugin();
depthPassPlugin.renderTarget = depthTarget;
renderer.addPrePlugin(depthPassPlugin);

在渲染功能中，我像这样渲染场景：

requestAnimationFrame(render);
depthPassPlugin.enabled = true;
renderer.render(scene, camera, composer.renderTarget2, true);
depthPassPlugin.enabled = false;
composer.render(0.1);

正如我之前所说的，一切似乎都运行良好，但屏幕上没有可见的AO效果。也许我只是使用错误的参数值？我已经确保通过将depthTarget渲染到场景来更新深度传递。如果我打开效果SSAO.uniforms.onlyAO.value，我得到一个非常“平坦”的褐色渲染的实际场景（包括纹理），但仍然没有AO。有人可以给我一个建议，接下来要尝试什么？

Answer 1

有一个示例使用当前版本的three.js（r56）https://twitter.com/mrdoob/status/300919764262477824

以下是代码的直接链接：http://goo.gl/RzfwH

感谢Altered Qualia和MrDoob提供的示例代码和three.js库！

如何使用three.js SSAO着色器？

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