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Hy.I畫了一個天空盒和裏面的一些物體，除了我的物體因爲使用gluPerspective而變形，我需要繪製天空盒和東西（例如我有一個立方體，但是它看起來像paralelipipedic（長一個更長的盒子））。現在我已經閱讀紅皮書的第3章，但我無法弄清楚。我嘗試使用glfrustrum，glortho等，但我只是無法弄清楚如何做到這一點工作正常。這是我的代碼：愚蠢的問題。如何在使用gluPerspective時讓我的物體不變形？
void display(void)
{
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
/*
Set projection matrix for 100 degree FOV
*/
GLfloat w = (GLfloat)glutGet(GLUT_WINDOW_WIDTH),h = (GLfloat)glutGet(GLUT_WINDOW_HEIGHT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(100,w/h,0.5,100);
/*
Set modelview matrix for camera
*/
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glRotatef(cameraPhi,1,0,0);
glRotatef(cameraTheta,0,1,0);
/*
No need to clear the color buffer, the skybox fills the whole screen
Shiny objects in cube environment mode use depth buffer, so we do need to clear that one
*/
glClear(GL_DEPTH_BUFFER_BIT);
/*
Draw skybox
*/
glDisable(GL_LIGHTING);
//the way i move around space(my camera)
gluLookAt(move_camera.x,move_camera.y,move_camera.z,move_camera.x,move_camera.y,move_camera.z-100,0,1,0);
drawSkybox2d(treeTexture);
glEnable(GL_LIGHTING);
//theese are my objects
chair(obiecte[0]);
table(obiecte[1]);
bed(obiecte[2]);
Sleep(5);
glutSwapBuffers();
}
和空中包廂我得出這樣的：
void drawSkybox2d(Texture treeTexture[])
{
/*
Enable 2d texture mapping
*/
glEnable(GL_TEXTURE_2D);
/*
Disable the depth buffer when rendering the skybox
*/
glDisable(GL_DEPTH_TEST);
glDepthMask(0);
int dim=20,x=1,y=0;
/*
Rear Face
*/
glBindTexture(GL_TEXTURE_2D,treeTexture[5].texID);
glBegin(GL_TRIANGLE_FAN);
glTexCoord2f(x,y);
glVertex3f(dim,dim,dim);
glTexCoord2f(x,x);
glVertex3f(dim,-dim,dim);
glTexCoord2f(y,x);
glVertex3f(-dim,-dim,dim);
glTexCoord2f(y,y);
glVertex3f(-dim,dim,dim);
glEnd();
/*
Front Face
*/
glBindTexture(GL_TEXTURE_2D,treeTexture[4].texID);
glBegin(GL_TRIANGLE_FAN);
glTexCoord2f(x,y);
glVertex3f(-dim,dim,-dim);
glTexCoord2f(x,x);
glVertex3f(-dim,-dim,-dim);
glTexCoord2f(y,x);
glVertex3f(dim,-dim,-dim);
glTexCoord2f(y,y);
glVertex3f(dim,dim,-dim);
glEnd();
/*
Right Face
*/
glBindTexture(GL_TEXTURE_2D,treeTexture[1].texID);
glBegin(GL_TRIANGLE_FAN);
glTexCoord2f(x,y);
glVertex3f(dim,dim,-dim);
glTexCoord2f(x,x);
glVertex3f(dim,-dim,-dim);
glTexCoord2f(y,x);
glVertex3f(dim,-dim,dim);
glTexCoord2f(y,y);
glVertex3f(dim,dim,dim);
glEnd();
/*
Left Face
*/
glBindTexture(GL_TEXTURE_2D,treeTexture[0].texID);
glBegin(GL_TRIANGLE_FAN);
glTexCoord2f(x,y);
glVertex3f(-dim,dim,dim);
glTexCoord2f(x,x);
glVertex3f(-dim,-dim,dim);
glTexCoord2f(y,x);
glVertex3f(-dim,-dim,-dim);
glTexCoord2f(y,y);
glVertex3f(-dim,dim,-dim);
glEnd();
/*
Top Face
*/
glBindTexture(GL_TEXTURE_2D,treeTexture[3].texID);
glBegin(GL_TRIANGLE_FAN);
glTexCoord2f(y,x);
glVertex3f(-dim,dim,dim);
glTexCoord2f(y,y);
glVertex3f(-dim,dim,-dim);
glTexCoord2f(x,y);
glVertex3f(dim,dim,-dim);
glTexCoord2f(x,x);
glVertex3f(dim,dim,dim);
glEnd();
/*
Bottom Face
*/
glBindTexture(GL_TEXTURE_2D,treeTexture[2].texID);
glBegin(GL_TRIANGLE_FAN);
glTexCoord2f(y,x);
glVertex3f(-dim,-dim,-dim);
glTexCoord2f(y,y);
glVertex3f(-dim,-dim,dim);
glTexCoord2f(x,y);
glVertex3f(dim,-dim,dim);
glTexCoord2f(x,x);
glVertex3f(dim,-dim,-dim);
glEnd();
/*
Reactive depth buffer
*/
glEnable(GL_DEPTH_TEST);
glDepthMask(1);
}
有人可以幫我以任何方式？
「變形」？截圖？ – genpfault 2010-12-02 20:01:10