Drag the points and see how the quad is rendered perfectly! ---|Notes|--- This quadrilateral was going to be for my upcoming 3D engine. Also, this quad is rendered with 2 triangles at all times (self intersection, concave, and convex). If you want to use this quad filler, you also need to use the triangle filler. you MUST give credit!! :) ---|Credits|--- Thanks to @TheLogFather for the triangle filler!!! Everything else (including the excruciatingly painful math) is by me. :) Thanks to @Raichu-Model for the feedback AND the motivation to make this quad filler!
