Stamped Textured Tri Fill v1.4

V1.0 UPDATE: Fixed ALL the bugs, the tri fill is now >99% accurate!!

Link to texture_converter: https://github.com/Joeclinton1/texture_converter

------------------------ Issues -----------------------------
- High ram usage: limits costume size and number of textures

---------------------- Credits -----------------------------------Cube engine: @l8P, @MathMathMath
fisheye stretch idea: @mentalbox

---------------------- Dev log -----------------------------------
20/08 - v0.1 - Shared initial release version
23/08 - v0.1.1 - Added github link
01/12 - v0.2 - Changed to equilateral triangle
01/12 - v0.3 - fixed fw equation with interpolated lookup table
02/12 - v0.4 - used svg to create more accurate textures
03/12 - v1.0 - fixed final bugs!
04/12 - v1.1 - optimised code
01/09 - v1.2 - Very slightly optimised code
02/09 - V1.3 - Added constant generator and fixed costumes so R=32 rather than
02/09 - V1.4 - Changed to bounding circle, and scaled costumes by 0.25 so the triangle is visible
#3D