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- <h1>材质常量(Material Constants)</h1>
- <p class="desc">
- 由这些常量定义的属性对所有的材质类型都生效,除了Texture Combine Operations只应用于
- [page:MeshBasicMaterial.combine MeshBasicMaterial],[page:MeshLambertMaterial.combine MeshLambertMaterial]和[page:MeshPhongMaterial.combine MeshPhongMaterial]。<br />
- </p>
- <h2>面</h2>
- <code>
- THREE.FrontSide
- THREE.BackSide
- THREE.DoubleSide
- </code>
- <p>
- 定义了哪一边的面将会被渲染 —— 正面,或是反面,还是两个面都渲染。
- 默认值是[page:Constant FrontSide](只渲染正面)。
- </p>
- <h2>混合模式</h2>
- <code>
- THREE.NoBlending
- THREE.NormalBlending
- THREE.AdditiveBlending
- THREE.SubtractiveBlending
- THREE.MultiplyBlending
- THREE.CustomBlending
- </code>
- <p>
- 这些值控制着源和目标材质中,被发送到WebGLRenderer,来给WebGL使用的包含有RGB和Alpha数据的混合方程。<br />
- 默认值是[page:Constant NormalBlending]。<br />
- 请注意,[page:Constant CustomBlending]必须被设置为自定义混合方程([page:CustomBlendingEquation Custom Blending Equations])常量中的值。<br />
- 请查看示例:[example:webgl_materials_blending materials / blending]。<br />
- </p>
- <h2>深度模式</h2>
- <code>
- THREE.NeverDepth
- THREE.AlwaysDepth
- THREE.LessDepth
- THREE.LessEqualDepth
- THREE.GreaterEqualDepth
- THREE.GreaterDepth
- THREE.NotEqualDepth
- </code>
- <p>
- 材质使用这些深度函数来比较输入像素和缓冲器中Z-depth的值。
- 如果比较的结果为true,则将绘制像素。<br />
- [page:Materials NeverDepth] 永远不返回true。<br />
- [page:Materials AlwaysDepth] 总是返回true。<br />
- [page:Materials LessDepth] 当输入像素Z-depth小于当前缓冲器Z-depth时,返回true。<br />
- [page:Materials LessEqualDepth] 为默认值,当输入像素Z-depth小于或等于当前缓冲器Z-depth时,返回true。<br />
- [page:Materials GreaterEqualDepth] 当输入像素Z-depth大于或等于当前缓冲器Z-depth时,返回true。 <br />
- [page:Materials GreaterDepth] 当输入像素Z-depth大于当前缓冲器Z-depth时,返回true。<br />
- [page:Materials NotEqualDepth] 当输入像素Z-depth不等于当前缓冲器Z-depth时,返回true。<br />
- </p>
- <h2>纹理结合操作</h2>
- <code>
- THREE.MultiplyOperation
- THREE.MixOperation
- THREE.AddOperation
- </code>
- <p>
- 这些常量定义了物体表面颜色与环境贴图(如果存在的话)相结合的结果,
- 用在[page:MeshBasicMaterial.combine MeshBasicMaterial]、[page:MeshLambertMaterial.combine MeshLambertMaterial]和[page:MeshPhongMaterial.combine MeshPhongMaterial]当中。<br />
- [page:Constant MultiplyOperation] 是默认值,它将环境贴图和物体表面颜色进行相乘。<br />
- [page:Constant MixOperation] 使用反射率来混和两种颜色。uses reflectivity to blend between the two colors.<br />
- [page:Constant AddOperation] 用于对两种颜色进行相加。</p>
- <h2>模板函数</h2>
- <code>
- THREE.NeverStencilFunc
- THREE.LessStencilFunc
- THREE.EqualStencilFunc
- THREE.LessEqualStencilFunc
- THREE.GreaterStencilFunc
- THREE.NotEqualStencilFunc
- THREE.GreaterEqualStencilFunc
- THREE.AlwaysStencilFunc
- </code>
- <p>
- 材质使用的模板函数,用于决定是否执行一项模板操作.<br />
- [page:Materials NeverStencilFunc] 一定会返回true.<br />
- [page:Materials LessStencilFunc] 当模板基准值比当前模板值小的时候返回true.<br />
- [page:Materials EqualStencilFunc] 当模板基准值和当前模板值一样的时候返回true.<br />
- [page:Materials LessEqualStencilFunc] 当模板基准值小于等于当前模板值的时候返回true.<br />
- [page:Materials GreaterStencilFunc] 当模板基准值比当前模板值大的时候返回true.<br />
- [page:Materials NotEqualStencilFunc] 当模板基准值与当前模板值不相等的时候返回true.<br />
- [page:Materials GreaterEqualStencilFunc] 当模板基准值比当前模板值大的时候返回true.<br />
- [page:Materials AlwaysStencilFunc] 一定会返回true.<br />
- </p>
- <h2>模板操作</h2>
- <code>
- THREE.ZeroStencilOp
- THREE.KeepStencilOp
- THREE.ReplaceStencilOp
- THREE.IncrementStencilOp
- THREE.DecrementStencilOp
- THREE.IncrementWrapStencilOp
- THREE.DecrementWrapStencilOp
- THREE.InvertStencilOp
- </code>
- <p>
- 当提供的模板函数通过的时候,材质会在模板缓冲像素上执行怎样的模板操作.<br />
- [page:Materials ZeroStencilOp] 将模板值设置为0。<br />
- [page:Materials KeepStencilOp] 不会对模板值进行任何操作。<br />
- [page:Materials ReplaceStencilOp] 使用模板基准值覆盖模板值。<br />
- [page:Materials IncrementStencilOp] 将当前模板值加1。<br />
- [page:Materials DecrementStencilOp] 将当前模板值减1。<br />
- [page:Materials IncrementWrapStencilOp] 将当前模板值加1,如果这个值超过了255则会设置为0。<br />
- [page:Materials DecrementWrapStencilOp] 将当前模板值减1,如果这个值低于0则会设置为255<br />
- [page:Materials InvertStencilOp] 将当前模板值按位反转.<br />
- </p>
- <h2>GLSL Version</h2>
- <code>
- THREE.GLSL1
- THREE.GLSL3
- </code>
- <h2>源代码</h2>
- <p>
- [link:https://github.com/mrdoob/three.js/blob/master/src/constants.js src/constants.js]
- </p>
- </body>
- </html>
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