OpenGL中的多视口

就是在OpenGL中实现多个视口，每个视口对应不同的用途。

我的代码：

//视口一 左下角glEnable(GL_SCISSOR_TEST);glScissor(0,0,m_width/2-1,m_height/2-1);glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glDisable(GL_SCISSOR_TEST);glViewport(0,0,m_width/2-1,m_height/2-1);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluPerspective(45.0f,(GLfloat)m_width/(GLfloat)m_height,0.1f,100.0f);glMatrixMode(GL_MODELVIEW);glLoadIdentity(); //绘制部分//视口二 左上角glEnable(GL_SCISSOR_TEST);glScissor(0,m_height/2+1,m_width/2-1,m_height/2-1);glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glDisable(GL_SCISSOR_TEST);glViewport(0,m_height/2+1,m_width/2-1,m_height/2-1);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluPerspective(45.0f,(GLfloat)m_width/(GLfloat)m_height,0.1f,100.0f);glMatrixMode(GL_MODELVIEW);glLoadIdentity();//绘制部分//视口三 右下角glEnable(GL_SCISSOR_TEST);glScissor(m_width/2+1,0,m_width/2-1,m_height/2-1);glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glDisable(GL_SCISSOR_TEST);glViewport(m_width/2+1,0,m_width/2-1,m_height/2-1);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluPerspective(45.0f,(GLfloat)m_width/(GLfloat)m_height,0.1f,100.0f);glMatrixMode(GL_MODELVIEW);glLoadIdentity();//绘制部分//视口四 右上角glEnable(GL_SCISSOR_TEST);glScissor(m_width/2+1,m_height/2+1, m_width/2-1, m_height/2-1);glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glDisable(GL_SCISSOR_TEST);glViewport(m_width/2+1,m_height/2+1, m_width/2-1, m_height/2-1);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluPerspective(45.0f,(GLfloat)m_width/(GLfloat)m_height,0.1f,100.0f);glMatrixMode(GL_MODELVIEW);glLoadIdentity();//绘制部分

 

 

效果：