转自NeHe教程
public override void Draw() { // Here's Where We Do All The Drawing
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear Screen And Depth Buffer
glLoadIdentity(); // Reset The Current Modelview Matrix
glTranslatef(0.0f, 0.0f, -6.0f); // Move Into The Screen 6.0
glRotatef(angle, 0.0f, 1.0f, 0.0f); // Rotate The Triangle On The Y Axis By angle
for(rot1 = ; rot1 < ; rot1++) { // 2 Passes For Two Sets Of Triangles
glRotatef( 90.0f, 0.0f, 1.0f, 0.0f); // Rotate 90 Degrees On The Y-Axis
glRotatef(180.0f, 1.0f, 0.0f, 0.0f); // Rotate 180 Degress On The X-Axis
for(rot2 = ; rot2 < ; rot2++) { // 2 Passes For Each Of The Sets, Draw Two Triangles
glRotatef(180.0f, 0.0f, 1.0f, 0.0f); // Rotate 180 Degrees On The Y-Axis
glBegin(GL_TRIANGLES); // Begin Drawing Triangles
glColor3f(1.0f, 0.0f, 0.0f); glVertex3f( 0.0f, 1.0f, 0.0f); // Draw The Red Vertex
glColor3f(0.0f, 1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f); // Draw The Green Vertex
glColor3f(0.0f, 0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, 1.0f); // Draw The Blue Vertex
glEnd (); // Done Drawing Triangles
}
}
angle += 0.2f; // Update angle
glFlush(); // Flush The GL Rendering Pipeline
}