# 自定义混合方程常量（Custom Blending Equation Constants）

## 示例

[example:webgl_materials_blending_custom materials / blending / custom ]

## 用法

这个常量可以用于所有的材质类型。首先将材质的混合模式设置为THREE.CustomBlending，然后设置所需要的混合方程、源因子和目标因子。

`var material = new THREE.MeshBasicMaterial( {color: 0x00ff00} ); material.blending = THREE.CustomBlending; material.blendEquation = THREE.AddEquation; //default material.blendSrc = THREE.SrcAlphaFactor; //default material.blendDst = THREE.OneMinusSrcAlphaFactor; //default`

## 混合方程

`THREE.AddEquation THREE.SubtractEquation THREE.ReverseSubtractEquation THREE.MinEquation THREE.MaxEquation`

## 源因子

`THREE.ZeroFactor THREE.OneFactor THREE.SrcColorFactor THREE.OneMinusSrcColorFactor THREE.SrcAlphaFactor THREE.OneMinusSrcAlphaFactor THREE.DstAlphaFactor THREE.OneMinusDstAlphaFactor THREE.DstColorFactor THREE.OneMinusDstColorFactor THREE.SrcAlphaSaturateFactor`

## 目标因子

所有的源因子的值，在目标因子中都是有效的。除了：`THREE.SrcAlphaSaturateFactor`

## 源代码

[link:https://github.com/mrdoob/three.js/blob/master/src/constants.js src/constants.js]