V2 : Cleanup : Decompose OrthoNormalBasis into functional API

[z3dev]

So, we have multiple things inside orthoBasis:

• to2D ; used in reTesselateCoplanarPolygons
• to3D ; used in reTesselateCoplanarPolygons
• getProjectionMatrix ; used in connectors
• getInverseProjectionMatrix; used in connectors

For the projection matrices:

note: a projection matrix, is just another matrix (as in a set of operations on mat4 s) so perhaps we can do something in that direction: just adding new functions to mat4 ?

The proposed (closed) PR #160 adds functionality to plane, toXYPlaneTransforms(). This function produces matching projection and inverse project between planes.

[z3dev]

No longer relevant as this library is part of OpenJSAD.org