OPENGL坐标变换的问题

2002-09-16 11:34:51 96 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

C++.OpenGL （6/64）坐标系统（Coordinate Systems）坐标系统 (Coordinate Systems) 坐标变换流程 1. 坐标空间详解 2. 视锥体 (Frustum) 3. 深麼缓冲原理 4. 坐标变换实现 5.自定义裁剪平面 6. 坐标系统调试 7. 常见问题解决 8. 高级技巧：反转深度缓冲阅读详情

我的代码如下：
void CWnd3D::OnPaint()
{
CPaintDC dc(this); // device context for painting

// TODO: Add your message handler code here
HDC hdc = ::GetDC(m_hWnd);
HGLRC hglrc;

// TODO: Add your message handler code here
glClearColor(0,0,0,0);
glColor3f(1, 1, 1);

if (hglrc = wglCreateContext(hdc))
{
// try to make it the thread's current rendering context
if(wglMakeCurrent(hdc, hglrc))
{
//render here
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(m_fRot[0], 1, 0, 0);
glRotatef(m_fRot[1], 0, 1, 0);

glScalef(200, 300, 256);/////注意这行！！

//画坐标轴
if (m_bAxis)
{
DrawAxis();
}

glPopMatrix();
// glFlush();

SwapBuffers(hdc);
}
}

wglMakeCurrent(NULL, NULL) ;
::ReleaseDC (m_hWnd, hdc) ;
wglDeleteContext(hglrc);

// Do not call CWnd::OnPaint() for painting messages
}

void CWnd3D::DrawAxis()
{
glBegin(GL_LINES);
glColor3f(1,0,0);//x轴
glVertex3f(0,0,0);
glVertex3f(1,0,0);
glColor3f(0,1,0);//y轴
glVertex3f(0,0,0);
glVertex3f(0,1,0);
glColor3f(0,0,1);//z轴
glVertex3f(0,0,0);
glVertex3f(0,0,1);
glEnd();
}

我想画坐标超过100的图元（如画线从(0,0,0)到(200,120,200)），怎么办？用glScalef()怎么没有反应？？？

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