Hacker News Reader

> You generally need to know where things are for collision checking and other things so doing it all on the gpu is not an option

Sure. You can do some of it in software. That's fine.

Point is I didn't use the GPU at all, and did all the rendering in software. No matter how you rotate or translate it, that's not a particularly efficient way of doing it.

View on HN

Anyway, the GPU usually does it with matrix multiplications.

So what are some of the more efficient ways of doing it, if it's not too much to ask? :-)

To have the GPU do the work for you.

A series of calls to OpenGL is a heck of a lot easier than setting up 3x3 rotation and translation-matrices and implementing a library to do 3x1, 1x3, 3x3 matrix multiplications, scalar transformations, transpositions, calculating determinants, planar projections, perspective shifts, and what have you.

Reply on news.ycombinator.com