This is my triangle filler based on my math. [How does it works ?] Triangles are defined by 3 points with there own coordinates (x,y). 1 - calculs distance between points (euclidian norms) 2 - calculs different angles with Al-Kashi. 3 - calculs coordinates of the intersection of 2 bisectors using there equation (determined according my general formula) 4 - uses Heron's formula to determine the radius of the inscribed circle 5 - fills triangles using a decreasing system : it traces triangles more and more close to edges starting at the middle of the distance from the center of inscribed circle divided by 2 each time [Version] V1.0 (05/25) : well, no code but only math lol V1.1 (05/25) : first attempt to fill a triangle, so calculate and trace inscribed circle position base on my formulas V1.2 (05/07/25) : i thought my previous code to place the center of the inscribed circle was correct, but i forgot there were 4 cases disjunction so i added it and it work. V1.3 (06/07/25) : now fill triangles V1.4 (05/03/26) : realised there was a bug when x2-x1=0... It's ok now