// 自定义初始化着色器initShader方法
public void initShader(MySurfaceView mv) {
// 加载顶点着色器的脚本内容
mVertexShader = ShaderUtil.loadFromAssetsFile("vertex_tex.sh", mv.getResources());
// 加载片元着色器的脚本内容
mFragmentShader = ShaderUtil.loadFromAssetsFile("frag_tex.sh", mv.getResources());
// 基于顶点着色器与片元着色器创建程序
mProgram = createProgram(mVertexShader, mFragmentShader);
// 获取程序中顶点位置属性引用id
maPositionHandle = GLES20.glGetAttribLocation(mProgram, "aPosition");
// 获取程序中顶点纹理坐标属性引用id
maTexCoorHandle = GLES20.glGetAttribLocation(mProgram, "aTexCoor");
// 获取程序中总变换矩阵引用id
muMVPMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uMVPMatrix");
}
