Hi for all
I'm putting some triangles(9 triangles) in my program but the results I didn't understand.
What I'm doing for each triangles is:
- I make a call for glTranslateMatrix();
- I make a call for glRotateMatrix() in the z-axis;
- Draw the triangle;
- Add 45 in the iAngle variable;
I'm doing this to position and rotate the triangles one after another in the x-axis. The first 3 triangles works fine but the 4 to the 8 down a little bit and in the 9th triangle returns to the normal. What this thing occurs?
This is the img:
And this is the code that I've made:
while(!bQuit)
{
if(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
if(msg.message == WM_QUIT)
{
bQuit =!bQuit;
break;
}
else
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
else
{
GetClientRect(hwnd, &tempRect);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
SetFieldOfView(tempRect.right,tempRect.bottom);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
for(int i = 0, x = 8, y = 0.1, iAngle = 0 ; i < 9 ; i++, x-=2)
{
glPushMatrix();
glTranslatef(x, y, -20);
glRotatef(iAngle, 0, 0, 1);
glColor3f(1,1,1);
glBegin(GL_TRIANGLES);
glVertex2f(0,0);
glVertex2f(1,0);
glVertex2f(1/2,1);
glEnd();
glPopMatrix();
iAngle+=45;
}
SwapBuffers(hdc);
}
And this is the code that I've made:
