Struggling to understand

Ikus · 2002-03-20T14:17:01

It''s time for me to suck it in, and swallow my pride! Been *scouring* GD.net, & flipcode.com, & planetsourcecode.com random coding sites & even DK encylopedia of science! And I still can''t grasp that which the rest of you seem to have! It boils down to this question... Why do we use Vectors in 3D engines? More precisely... - I have a clear understanding of Vectors in a mathematical sense. - I can imagine how (in many ways) I could implement them into a programme. (Two points, one for the head one for the tail, a Point + 3d angle + module, and other methods) - Why would you need to *know* the direction of a point in 3D space (other then a few, i.e. normals, raytraces) But why also Vertexs? - I read somewhere that all Vectors extend from the origin?!? (which origin?) There are many other questions but i think these are the important ones... ANY help from anyone who could help the penny drop would be greatfully appreciated. Maybe then i can tackle Matrix math!