opengl初探部分代码

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1、将Onsize代码替换成如下的代码，使前述的平行投影变成透视投影void CMyOpenGLView:OnSize(UINT nType, int cx, int cy)glViewport(0,0,cx,cy);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluPerspective(45,(float)cx/(float)cy,0.1,15);glMatrixMode(GL_MODELVIEW);glLoadIdentity();以下是修改Draw方法的代码，以实现不同的功能/2D图形绘制glClearColor(0,0,0,1);glClea

2、r(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);glLoadIdentity();glShadeModel(GL_SMOOTH);glTranslatef(-1.5f,1.0f,-7.0f);glColor3f(1.0f,0.0f,0.0f);glBegin(GL_TRIANGLES);glVertex3f(0.0f,1.0f,0.0f);glVertex3f(-1.0f,-1.0f,0.0f);glVertex3f(1.0f,-1.0f,0.0f);glEnd();glTranslatef(3.0f,0.0f,0.0f);glColor3f(0.0f,0

3、.0f,1.0f);glBegin(GL_QUADS);glVertex3f(-1.0f,1.0f,0.0f);glVertex3f(-1.0f,-1.0f,0.0f);glVertex3f(1.0f,-1.0f,0.0f);glVertex3f(1.0f,1.0f,0.0f);glEnd();glTranslatef(-1.5f,-2.5f,0.0f);glColor3f(1.0f,1.0f,0.0f);glLineWidth(2.0f);glBegin(GL_LINE_LOOP);for(int i=0;i200;i+)glVertex3f(1.0*float(sin(2*3.14*i/2

4、00),1.0*float(cos(2*3.14*i/200),0.0);glEnd();SwapBuffers(m_hDC);glFlush();/阴暗处理glClearColor(0,0,0,1);glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);glLoadIdentity();glShadeModel(GL_SMOOTH);/设置平滑插值glTranslatef(-1.5f,1.0f,-7.0f);glColor3f(1.0f,0.0f,0.0f);glBegin(GL_TRIANGLES);glColor3ub(255,0,0);glV

5、ertex3f(0.0f,1.0f,0.0f);glColor3ub(0,255,0);glVertex3f(-1.0f,-1.0f,0.0f);glColor3ub(255,255,0);glVertex3f(1.0f,-1.0f,0.0f);glEnd();glTranslatef(3.0f,0.0f,0.0f);glColor3ub(0,255,255);glBegin(GL_QUADS);glVertex3f(-1.0f,1.0f,0.0f);glVertex3f(-1.0f,-1.0f,0.0f);glVertex3f(1.0f,-1.0f,0.0f);glVertex3f(1.0f

6、,1.0f,0.0f);glEnd();glTranslatef(-1.5f,-2.5f,0.0f);glColor3f(1.0f,1.0f,0.0f);glLineWidth(2.0f);glBegin(GL_LINE_LOOP);for(int i=0;i360.0)angle_Left-=360.0;glBegin(GL_TRIANGLES);/正面 glColor3ub(217,167,22);glVertex3f(0.0f,1.0f,0.0f);glVertex3f(-1.0f,-1.0f,1.0f);glVertex3f(1.0f,-1.0f,1.0f);/反面glColor3ub

7、(200,100,22);glVertex3f(0.0f,1.0f,0.0f);glVertex3f(1.0f,-1.0f,-1.0f);glVertex3f(-1.0f,-1.0f,-1.0f);/右侧面glColor3ub(217,122,0);glVertex3f(0.0f,1.0f,0.0f);glVertex3f(1.0f,-1.0f,1.0f);glVertex3f(1.0f,-1.0f,-1.0f);/左侧面glVertex3f(0.0f,1.0f,0.0f);glVertex3f(-1.0f,-1.0f,-1.0f);glVertex3f(-1.0f,-1.0f,1.0f);g

8、lEnd();/底面glColor3ub(217,122,100);glBegin(GL_QUADS);glVertex3f(-1.0f,-1.0f,-1.0f);glVertex3f(1.0f,-1.0f,-1.0f);glVertex3f(1.0f,-1.0f,1.0f);glVertex3f(-1.0f,-1.0f,1.0f);glEnd();glPopMatrix();/矩阵出栈glTranslatef(4.0f,0.0f,0.0f);glRotatef(angle_X,1.0f,0.0f,0.0f);glRotatef(angle_Y,0.0f,1.0f,0.0f);DrawCube

9、(2.0f,0.2f,0.2f);DrawCube(0.2f,2.0f,0.2f);SwapBuffers(m_hDC);glFlush();除此之外，我们添加一个Timer函数为消息中WM_TIMER添加响应OnTimer方法，代码如下void CMyOpenGLView:OnTimer(UINT nIDEvent) / TODO: Add your message handler code here and/or call defaultDraw();CView:OnTimer(nIDEvent);那么SetTimer(1,100,NULL)是触发Timer消息，而KillTimer(1)

10、;是使得响应消亡。为实现能在键盘控制下旋转上述的3D图形为消息WM_KEYUP添加响应OnKeyUpvoid CMyOpenGLView:OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags) / TODO: Add your message handler code here and/or call defaultif (nChar = VK_F2)KillTimer(1);if (nChar = VK_F1)SetTimer(1,100,NULL);if (nChar = VK_UP)angle_X-=5;if (nChar = VK_DOWN)angle_X+=5;if (nChar = VK_LEFT)angle_Y-=5;if (nChar = VK_RIGHT)angle_Y+=5;CView:OnKeyUp(nChar, nRepCnt, nFlags);