An example of a simple geometric locus.
Point A moves on circle o1.
Point C is the projection of A, parallel to line e, onto the fixed line o2.
Point B is the projection of C, parallel to the direction d, makin an angle w (constant) with line AO, on the line AO (O fixed point).
b is the curve representing the geometric locus of B.
The simple case, a generalization of which is the present, is contained in the document:
Simple_Geo_Locus.html .