在单个FBO中渲染具有不同着色器的两个VBO对象

Question

我无法找到一种方法来渲染一个带有简单God Ray着色器和另一个VBO对象drawS（）的立方体。这段代码给了我两个对象具有相同的God Ray效果。我的目标是给drawS（）一个自己的效果。有什么想法吗？

void COpenGLRenderer :: Render（float FrameTime） {     // bind FBO ---------------------------------------------- -------------------------------------------------- ---------------

if(Blur)
{
    glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, FBO);
    glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, ColorBuffer, 0);
    glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
        GL_DEPTH_ATTACHMENT_EXT,
        GL_RENDERBUFFER_EXT, depth_rb);
//

// render scene -----------------------------------------------------------------------------------------------------------


glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);


glMatrixMode(GL_MODELVIEW);
glLoadMatrixf(&ViewMatrix);

glEnable(GL_DEPTH_TEST);
/*glPushMatrix();
glTranslatef(5.0, 3.0, 5.0);
glColor3f(1.0f, 1.0f, 1.0f);
glutSolidSphere(0.5, 20.0, 12.0);
glPopMatrix();*/
glColor3f(1.0f, 0.0f, 0.0f);
glutSolidCube(5.0);

glMatrixMode(GL_MODELVIEW);
glLoadMatrixf(&ViewMatrix);
glTranslatef(-30.0f, 0.0f, 0.0f);
glEnable(GL_DEPTH_TEST);
drawS();
    glDisable(GL_DEPTH_TEST);

//glDrawBuffer(GL_FRONT);

glBindTexture(GL_TEXTURE_2D, 0);

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);

// blur ColorBuffer texture -----------------------------------------------------------------------------------------------
glBindTexture(GL_TEXTURE_2D, ColorBuffer);

//glDisable(GL_DEPTH_TEST);

//if(Blur)
//{
    glUseProgram(GodRays);


    glBegin(GL_QUADS);

    glVertex2f(0.0f, 0.0f);
    glVertex2f(1.0f, 0.0f);
    glVertex2f(1.0f, 1.0f);
    glVertex2f(0.0f, 1.0f);
    glEnd();

    //glClear(GL_DEPTH_BUFFER_BIT);
//glClear(GL_DEPTH_BUFFER_BIT);

    glUseProgram(0);
}

}