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- <!DOCTYPE html>
- <html lang="zh">
- <head>
- <meta charset="utf-8" />
- <base href="../../../" />
- <script src="page.js"></script>
- <link type="text/css" rel="stylesheet" href="page.css" />
- </head>
- <body>
- [page:Texture] →
- <h1>帧缓冲纹理([name])</h1>
- <p class="desc">
- 这个类只能与 [page:WebGLRenderer.copyFramebufferToTexture]() 结合使用。
- </p>
- <code>
- const pixelRatio = window.devicePixelRatio;
- const textureSize = 128 * pixelRatio;
- // instantiate a framebuffer texture
- const frameTexture = new FramebufferTexture( textureSize, textureSize );
- // calculate start position for copying part of the frame data
- const vector = new Vector2();
- vector.x = ( window.innerWidth * pixelRatio / 2 ) - ( textureSize / 2 );
- vector.y = ( window.innerHeight * pixelRatio / 2 ) - ( textureSize / 2 );
- // render the scene
- renderer.clear();
- renderer.render( scene, camera );
- // copy part of the rendered frame into the framebuffer texture
- renderer.copyFramebufferToTexture( frameTexture, vector );
- </code>
- <h2>例子</h2>
- <p>[example:webgl_framebuffer_texture]</p>
- <h2>构造函数</h2>
- <h3>[name]( [param:Number width], [param:Number height] )</h3>
- <p>
- [page:Number width] -- 纹理的宽度<br />
- [page:Number height] -- 纹理的高度<br /><br />
- </p>
- <h2>属性</h2>
- <p>共有属性请参见其基类 [page:Texture Texture] </p>
- <h3>[property:Boolean generateMipmaps]</h3>
- <p>是否为 [name] 生成 mipmaps ,默认为`false`</p>
- <h3>[property:Boolean isFramebufferTexture]</h3>
- <p>只读,检查给定对象是否为 [name] 类型</p>
- <h3>[property:number magFilter]</h3>
- <p>
- 纹理元素覆盖多个像素时如何对纹理进行采样。默认值为 [page:Textures THREE.NearestFilter] ,它使用最接近的纹理元素。
- <br /><br />
- 更多细节详见 [page:Textures texture constants]
- </p>
- <h3>[property:number minFilter]</h3>
- <p>
- 纹理元素覆盖少于一个像素时如何对纹理进行采样。默认值为 [page:Textures THREE.NearestFilter] ,它使用最近的纹理元素。
- <br /><br />
- 更多细节详见 [page:Textures texture constants]
- </p>
- <h3>[property:Boolean needsUpdate]</h3>
- <p>默认为 `true` ,这是加载 canvas 数据所必需的</p>
- <h2>方法</h2>
- <p>共有方法请参见其基类 [page:Texture Texture] </p>
- <h2>源代码</h2>
- <p>
- [link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
- </p>
- </body>
- </html>
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