fixed warning

fixed testing of whether screenToModelCoordinates's result value is behind the camera

use glm::project instead of figuring out the conversion manually...

use glm::unProject to implement screenToModelCoordinates

PartRenderer::modelToScreenCoordinates FINALLY WORKS

grid stuff

made the grid look nicer

added grid program

avoid having the null id in the selection

selection works now

(0) -10 +10 +100 +300 tip

mercurial