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Fixed Point

While writing my software rasterizer for the GP2X (which does not support floating point arithmetic in hardware) i developed a small fixed point math library.

The library consists of various functions for dealing with fixed point numbers (multiplication, division, inversion, sin, cos, sqrt, rsqrt). It also contains a C++ wrapper class which can be used to simplify working with fixed points numbers greatly. I used this fixed point number class in conjunction with my vector_math library to obtain a fixed point vector math library. Doing so made the 3D computations a lot faster compared to the floating point version.

You can download the source below: 

 Source code


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