# [name]

发送到顶点着色器和片元着色器的GLSL程序的构造函数， 包含默认的变量(uniforms)和属性

## 内置的变量(uniforms)和属性

### 顶点着色器(无条件的):

`// = object.matrixWorld uniform mat4 modelMatrix; // = camera.matrixWorldInverse * object.matrixWorld uniform mat4 modelViewMatrix; // = camera.projectionMatrix uniform mat4 projectionMatrix; // = camera.matrixWorldInverse uniform mat4 viewMatrix; // = inverse transpose of modelViewMatrix uniform mat3 normalMatrix; // = camera position in world space uniform vec3 cameraPosition;` `// default vertex attributes provided by Geometry and BufferGeometry attribute vec3 position; attribute vec3 normal; attribute vec2 uv;`

注意，可以通过以下方式计算顶点着色器中顶点的位置： `gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );` 或者也可以这样： `gl_Position = projectionMatrix * viewMatrix * modelMatrix * vec4( position, 1.0 );`

### 顶点着色器(有条件的):

`#ifdef USE_COLOR // vertex color attribute attribute vec3 color; #endif` `#ifdef USE_MORPHTARGETS attribute vec3 morphTarget0; attribute vec3 morphTarget1; attribute vec3 morphTarget2; attribute vec3 morphTarget3; #ifdef USE_MORPHNORMALS attribute vec3 morphNormal0; attribute vec3 morphNormal1; attribute vec3 morphNormal2; attribute vec3 morphNormal3; #else attribute vec3 morphTarget4; attribute vec3 morphTarget5; attribute vec3 morphTarget6; attribute vec3 morphTarget7; #endif #endif` `#ifdef USE_SKINNING attribute vec4 skinIndex; attribute vec4 skinWeight; #endif`

### 片元着色器:

`uniform mat4 viewMatrix; uniform vec3 cameraPosition;`

## 构造器

### [name]( [param:WebGLRenderer renderer], [param:Object code], [param:Material material], [param:Object parameters] )

参数详见[page:WebGLRenderer WebGLRenderer]

## 属性

### [property:String id]

### [property:String code]

### [property:Integer usedTimes]

### [property:Object program]

### [property:WebGLShader vertexShader]

### [property:WebGLShader fragmentShader]

## 方法

### [method:Object getUniforms]()

返回所有活动态的变量(uniform)位置的name-value映射

### [method:Object getAttributes]()

返回所有活动态的顶点属性位置的name-value映射

## 源码

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