More forward renderer math fixes.
More forward renderer math fixes.

--HG--
branch : feature/math-objects

maxwellalive/engine,sanyaade-teachings/engine,shinate/engine,sereepap2029/playcanvas,MicroWorldwide/PlayCanvas,playcanvas/engine,shinate/engine,aidinabedi/playcanvas-engine,horryq/engine-1,sereepap2029/playcanvas,maxwellalive/engine,SuperStarPL/engine,3DGEOM/engine,sanyaade-teachings/engine,MicroWorldwide/PlayCanvas,maxwellalive/engine,nizihabi/engine,shinate/engine,sereepap2029/playcanvas,RainsSoft/engine,horryq/engine-1,SuperStarPL/engine,nizihabi/engine,guycalledfrank/engine,H1Gdev/engine,aidinabedi/playcanvas-engine,SuperStarPL/engine,horryq/engine-1,3DGEOM/engine,playcanvas/engine,nizihabi/engine,sanyaade-teachings/engine,H1Gdev/engine,RainsSoft/engine,guycalledfrank/engine,3DGEOM/engine,RainsSoft/engine