Function extrude

Extruce a 2D/3D trace using the dip angle, dip-direction and a depth.

Example:

const trace = {
     is: "1",
     dip: 35,
     dipDirection: 135,
     depth: 1000,
     rows: 5,
     points: Serie.create({array: [0,0, 0,1, 0,2, 1,3, 2,4], itemSize: 2})
}
const surface = extrude(trace)
console.log(surface.positions, surface.indices)