WebGLProgram

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;

构造函数

WebGLProgram(renderer : WebGLRenderer, cacheKey : String, parameters : Object)

参数详见WebGLRenderer.

属性

.name : String

The name of the respective shader program.

.id : String

The identifier of this instance.

.cacheKey : String

This key enables the reusability of a single WebGLProgram for different materials.

.usedTimes : Integer

How many times this instance is used for rendering render items.

.program : Object

The actual shader program.

.vertexShader : WebGLShader

An instance of WebGLShader representing the vertex shader.

.fragmentShader : WebGLShader

An instance of WebGLShader representing the frament shader.

方法

.getUniforms () : Object

返回所有活动态的变量(uniform)位置的name-value映射

.getAttributes () : Object

返回所有活动态的顶点属性位置的name-value映射

.destroy () : null

Destroys an instance of WebGLProgram.

源码

src/renderers/webgl/WebGLProgram.js