2D outline algorithm for projected 3D mesh

Question

Given: A 3D mesh defined with a set of vertices and triangles building up the mesh with these points.

Problem: Find the 2d outline of the projected arbitrarily rotated m

Answer 1

• Start with the rightmost point (the point with the biggest x coordinate)
• Get all edges from this point
• Follow the edge with the smallest angle to the positive x-axis, and also add it to the solution set
• From the point reached, follow and add the edge with the smallest angle to the edge you came from
• Repeat until you reach the original point