Angle between two normals

[Kilinich]

Here it is simplified formula for finding angle between two e.normal vectors:

Code: Select all

scene.my.na = (n1, n2) => {math.acos(n1(0)*n2(0) + n1(1)*n2(1)) * ((n1(0)*n2(1) - n1(1)*n2(0)) > 0 ? 1 : -1)}