NeHe教程Qt实现——lesson05

void MyGLWidget::paintGL()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);  // Clear The Screen And The Depth Buffer
glLoadIdentity();       // Reset The Current Modelview Matrix

glTranslatef(-1.5f,0.0f,-6.0f);     // Move Left 1.5 Units And Into The Screen 6.0

glRotatef(rtri,0.0f,1.0f,0.0f);				// Rotate The Pyramid On It's Y Axis

glBegin(GL_TRIANGLES);					// Start Drawing The Pyramid
glColor3f(1.0f,0.0f,0.0f);			// Red
glVertex3f( 0.0f, 1.0f, 0.0f);			// Top Of Triangle (Front)
glColor3f(0.0f,1.0f,0.0f);			// Green
glVertex3f(-1.0f,-1.0f, 1.0f);			// Left Of Triangle (Front)
glColor3f(0.0f,0.0f,1.0f);			// Blue
glVertex3f( 1.0f,-1.0f, 1.0f);			// Right Of Triangle (Front)

glColor3f(1.0f,0.0f,0.0f);			// Red
glVertex3f( 0.0f, 1.0f, 0.0f);			// Top Of Triangle (Right)
glColor3f(0.0f,0.0f,1.0f);			// Blue
glVertex3f( 1.0f,-1.0f, 1.0f);			// Left Of Triangle (Right)
glColor3f(0.0f,1.0f,0.0f);			// Green
glVertex3f( 1.0f,-1.0f, -1.0f);			// Right Of Triangle (Right)

glColor3f(1.0f,0.0f,0.0f);			// Red
glVertex3f( 0.0f, 1.0f, 0.0f);			// Top Of Triangle (Back)
glColor3f(0.0f,1.0f,0.0f);			// Green
glVertex3f( 1.0f,-1.0f, -1.0f);			// Left Of Triangle (Back)
glColor3f(0.0f,0.0f,1.0f);			// Blue
glVertex3f(-1.0f,-1.0f, -1.0f);			// Right Of Triangle (Back)

glColor3f(1.0f,0.0f,0.0f);			// Red
glVertex3f( 0.0f, 1.0f, 0.0f);			// Top Of Triangle (Left)
glColor3f(0.0f,0.0f,1.0f);			// Blue
glVertex3f(-1.0f,-1.0f,-1.0f);			// Left Of Triangle (Left)
glColor3f(0.0f,1.0f,0.0f);			// Green
glVertex3f(-1.0f,-1.0f, 1.0f);			// Right Of Triangle (Left)
glEnd();                        // Done Drawing The Pyramid

glLoadIdentity();
glTranslatef(1.5f,0.0f,-7.0f);              // Move Right And Into The Screen

glRotatef(rquad,1.0f,1.0f,1.0f);            // Rotate The Cube On X, Y & Z

glBegin(GL_QUADS);                  // Start Drawing The Cube
glColor3f(0.0f,1.0f,0.0f);          // Set The Color To Green
glVertex3f( 1.0f, 1.0f,-1.0f);          // Top Right Of The Quad (Top)
glVertex3f(-1.0f, 1.0f,-1.0f);          // Top Left Of The Quad (Top)
glVertex3f(-1.0f, 1.0f, 1.0f);          // Bottom Left Of The Quad (Top)
glVertex3f( 1.0f, 1.0f, 1.0f);          // Bottom Right Of The Quad (Top)

glColor3f(1.0f,0.5f,0.0f);          // Set The Color To Orange
glVertex3f( 1.0f,-1.0f, 1.0f);          // Top Right Of The Quad (Bottom)
glVertex3f(-1.0f,-1.0f, 1.0f);          // Top Left Of The Quad (Bottom)
glVertex3f(-1.0f,-1.0f,-1.0f);          // Bottom Left Of The Quad (Bottom)
glVertex3f( 1.0f,-1.0f,-1.0f);          // Bottom Right Of The Quad (Bottom)

glColor3f(1.0f,0.0f,0.0f);          // Set The Color To Red
glVertex3f( 1.0f, 1.0f, 1.0f);          // Top Right Of The Quad (Front)
glVertex3f(-1.0f, 1.0f, 1.0f);          // Top Left Of The Quad (Front)
glVertex3f(-1.0f,-1.0f, 1.0f);          // Bottom Left Of The Quad (Front)
glVertex3f( 1.0f,-1.0f, 1.0f);          // Bottom Right Of The Quad (Front)

glColor3f(1.0f,1.0f,0.0f);          // Set The Color To Yellow
glVertex3f( 1.0f,-1.0f,-1.0f);          // Bottom Left Of The Quad (Back)
glVertex3f(-1.0f,-1.0f,-1.0f);          // Bottom Right Of The Quad (Back)
glVertex3f(-1.0f, 1.0f,-1.0f);          // Top Right Of The Quad (Back)
glVertex3f( 1.0f, 1.0f,-1.0f);          // Top Left Of The Quad (Back)

glColor3f(0.0f,0.0f,1.0f);          // Set The Color To Blue
glVertex3f(-1.0f, 1.0f, 1.0f);          // Top Right Of The Quad (Left)
glVertex3f(-1.0f, 1.0f,-1.0f);          // Top Left Of The Quad (Left)
glVertex3f(-1.0f,-1.0f,-1.0f);          // Bottom Left Of The Quad (Left)
glVertex3f(-1.0f,-1.0f, 1.0f);          // Bottom Right Of The Quad (Left)

glColor3f(1.0f,0.0f,1.0f);          // Set The Color To Violet
glVertex3f( 1.0f, 1.0f,-1.0f);          // Top Right Of The Quad (Right)
glVertex3f( 1.0f, 1.0f, 1.0f);          // Top Left Of The Quad (Right)
glVertex3f( 1.0f,-1.0f, 1.0f);          // Bottom Left Of The Quad (Right)
glVertex3f( 1.0f,-1.0f,-1.0f);          // Bottom Right Of The Quad (Right)
glEnd();                     // Done Drawing The Quad

rtri += 0.2f;                    // Increase The Rotation Variable For The Triangle ( NEW )
rquad -= 0.15f;                  // Decrease The Rotation Variable For The Quad     ( NEW )
}