(转)Cocos2dx-JS 在 Sprite 上使用 Shader

//例如如下一个简单的变色程序，蓝色变红色 ,js 代码:

var url = "res/sb.jpg";
var sp = new cc.Sprite(url);
sp.setAnchorPoint( 0,0);
this.addChild(sp);
this.shader = new cc.GLProgram("res/Shaders/example_Flower.vsh", "res/Shaders/example_Flower.fsh");
this.shader.retain();
this.shader.link();
this.shader.updateUniforms();
var program = this.shader.getProgram();
sp.shaderProgram = this.shader;

VertexShader

attribute vec4 a_position;
attribute vec2 a_texCoord;
attribute vec4 a_color;

#ifdef GL_ES
varying lowp vec4 v_fragmentColor;
varying mediump vec2 v_texCoord;
#else
varying vec4 v_fragmentColor;
varying vec2 v_texCoord;
#endif

void main()
{
gl_Position = CC_PMatrix * a_position;
v_fragmentColor = a_color;
v_texCoord = a_texCoord;
}

FragmentShader