OPENGL坐标变换的问题

icaohong 2002-09-16 11:34:51
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???
...全文
45 2 打赏 收藏 转发到动态 举报
写回复
用AI写文章
2 条回复
切换为时间正序
请发表友善的回复…
发表回复
AloneWolf 2002-09-17
  • 打赏
  • 举报
回复
void CNCSimView::InitDraw()
{
glClearColor(m_SimBkColor.Red,m_SimBkColor.Green,m_SimBkColor.Blue,1.0);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

//公共变换
glLoadIdentity();
glTranslatef(m_SimMove.MoveX,m_SimMove.MoveY,-m_SimMove.MoveZ);
glScaled(m_SimScale,m_SimScale,m_SimScale);
glRotatef(m_SimRotate.RotateX,1.0,0.0,0.0);
glRotatef(m_SimRotate.RotateY,0.0,1.0,0.0);
glRotatef(m_SimRotate.RotateZ,0.0,0.0,1.0);

//画轴线
glDisable(GL_LIGHTING);
DrawAxis();

if(m_SimMode==SIM_PART_MODE)
{
glLightfv(GL_LIGHT0,GL_AMBIENT,m_SimLight.Ambient);
glLightfv(GL_LIGHT0,GL_DIFFUSE,m_SimLight.Diffuse);
glLightfv(GL_LIGHT0,GL_SPECULAR,m_SimLight.Specular);
// glLightfv(GL_LIGHT0,GL_POSITION,m_SimLight.Position);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);

glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
}
else
{
glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
}
}
void CNCSimView::DrawAxis()
{
glPushMatrix();
glBegin(GL_LINES);
glColor3f(1.0f,0.0f,0.0f);
glVertex3f(0.0f,0.0f,0.0f);
glVertex3f(500.0f,0.0f,0.0f);

glColor3f(0.0f,1.0f,0.0f);
glVertex3f(0.0f,0.0f,0.0f);
glVertex3f(0.0f,500.0f,0.0f);

glColor3f(0.0f,0.0f,1.0f);
glVertex3f(0.0f,0.0f,0.0f);
glVertex3f(0.0f,0.0f,500.0f);
glEnd();
glPopMatrix();//1

}

void CNCSimView::DrawScreen()
{


InitDraw();

/* if(m_SimMode==SIM_PART_MODE)
{
DrawPart();
}
else
{
DrawNodeList();
}
DrawTool();*/
SwapBuffers(wglGetCurrentDC());
}

BOOL CNCSimView::OnEraseBkgnd(CDC* pDC)
{
// TODO: Add your message handler code here and/or call default
DrawScreen();
return TRUE;
// return CView::OnEraseBkgnd(pDC);
}
icaohong 2002-09-17
  • 打赏
  • 举报
回复
help~~~

16,472

社区成员

发帖
与我相关
我的任务
社区描述
VC/MFC相关问题讨论
社区管理员
  • 基础类社区
  • Web++
  • encoderlee
加入社区
  • 近7日
  • 近30日
  • 至今
社区公告

        VC/MFC社区版块或许是CSDN最“古老”的版块了,记忆之中,与CSDN的年龄几乎差不多。随着时间的推移,MFC技术渐渐的偏离了开发主流,若干年之后的今天,当我们面对着微软的这个经典之笔,内心充满着敬意,那些曾经的记忆,可以说代表着二十年前曾经的辉煌……
        向经典致敬,或许是老一代程序员内心里面难以释怀的感受。互联网大行其道的今天,我们期待着MFC技术能够恢复其曾经的辉煌,或许这个期待会永远成为一种“梦想”,或许一切皆有可能……
        我们希望这个版块可以很好的适配Web时代,期待更好的互联网技术能够使得MFC技术框架得以重现活力,……

试试用AI创作助手写篇文章吧