Additive blending (i.e. glBlendFunc(GL_ONE,GL_ONE)) will sum colours. Depending upon the number of points which may fall within a pixel, you may need...
Hi, I'm about to begin OpenGL programming in a couple of weeks. Our professor gave us instructions and libraries to run a hello world sort of project...
Note that this is far from straightforward. It isn't generally possible to define an offset curve as another curve of the same type and degree. E.g....