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;

构造器

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

最后更新于 2022年6月27日