In OpenGL, can I draw a pixel that exactly at the coordinates (5, 5)?

Question

By (5, 5) I mean exactly the fifth row and fifth column.

I found it very hard to draw things using screen coordinates, all the coordinates in OpenGL is relative, and usu

Answer 1

@dandan78 OpenGL is not a Vector Graphics renderer. Is a Rasterizer. And in a more precise way is a Standard described by means of a C language interface. A rasterizer, maps objects represented in 3D coordinated spaces (a car, a tree, a sphere, a dragon) into 2D coordinated spaces (say a plane, your app window or your display), these 2d coordinates belong to a discrete coordinated plane. The counter rendering method of rasterization is Ray Tracing.

Vector graphics is a way to represent by means of mathematical functions a set of curves, lines or similar geometrical primitives, in a nondiscrete way. So Vector graphics is in the "model representation" field rather than "rendering" field.