Cocos2dx绘制贴图

Cocos2dx下 基本的OpenGL ES 绘图

分类： cocos2dx 2013-07-01 00:36  4652人阅读  评论(3)  收藏  举报

 void GLFirstLayer::draw()
 {
    // CCLayer::draw();


     //顶点数据
     static GLfloat vertex[] = {
         0,0,0,
         200,0,0,
         0,200,0,
         200,200,0
     };

     //纹理坐标
     static GLfloat coord[] = {
         0,1,
         1,1,
         0,0,
         1,0
     };

     //颜色数据
     static GLfloat color[] = {
         1,1,1,1,
         1,1,1,1,
         1,1,1,1,
         1,1,1,1
     };


     //初始化纹理
     static CCTexture2D* texture2d = NULL;
     if (!texture2d) {
         texture2d = CCTextureCache::sharedTextureCache()->addImage("HelloWorld.png");
     }

     //设置着色器
     ccGLEnableVertexAttribs(kCCVertexAttribFlag_PosColorTex);
     texture2d->getShaderProgram()->use();
     texture2d->getShaderProgram()->setUniformForModelViewProjectionMatrix();


     //绑定纹理
     glBindTexture(GL_TEXTURE_2D, texture2d->getName());


     //设置顶点数据
     glVertexAttribPointer(kCCVertexAttrib_Position, 3, GL_FLOAT, GL_FALSE, 0, vertex);
     glVertexAttribPointer(kCCVertexAttrib_Color, 4, GL_FLOAT, GL_FALSE, 0, color);
     glVertexAttribPointer(kCCVertexAttrib_TexCoords, 2, GL_FLOAT, GL_FALSE, 0, coord);

     //绘图
     glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 }

上面就绘制了一个矩形，直接重写 draw()方法即可