[fpc-pascal] FPC Graphics options?

[Graeme Geldenhuys]

On 2017-05-17 14:28, Reimar Grabowski wrote:
> But I don't get why you have to *calculate* *all*.

The CPU (your program) calculates all the 3D vertex points, as objects 
(made out of vertex points) move through the scene. Lots of triangles 
really.

The GPU calculates the individual pixel colors based on those vertex 
points (using shaders and textures). eg: CPU calculates 3 points of a 
triangle. The GPU calculates all the points between those 3 points, 
making up the triangle color. The GPU also does clipping calculations 
based on the viewpoint (camera position) in the 3D scene.

So if you work out how many vertex points there are, compared to 
everything that the GPU has to do (a LOT more points and calculations), 
the CPU does relatively little in comparison.

Regards,
   Graeme

-- 
fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal
http://fpgui.sourceforge.net/

My public PGP key:  http://tinyurl.com/graeme-pgp