About Micro 3D engine for ATMEL and STM32 more specification re the VERTEX engine. L and R shows the angle limits for sight, the BLACK circle is visible and the RED circle is not. The BLACK circle is outside the sight angle. You can also see a BLUE circle, that is not visible because it is outside the DOF specification. In reset the camera can see 200 units away no more, so the blue circle is out of sight as well. The BLACK circle is actually ONLY a X,Y,Z coordinate that is shown visible by the projection function. The function will give you i.e. 50,45 as the correct graphical coordinates to plot this point. Since the engine only handles vertices you can use the information any way you like!  - Advanced MENU control  - Simple game engine  - Robotic navigation support L R