Opengl 2d Picking, Go through all … One easy method is to render each object with different color.

Opengl 2d Picking, Understand OpenGL Picking mode (OpenGL Picking) Click to open the linkWhen using OpenGL for graphics programming, it is usually necessary to use the mouse for interactive operations, such as Picking is a method of selecting 3D object in 2D space. I am trying to decide what is the best way to do picking in OpenGL with glOrtho2D mode on a tile based game. 3 and later. The process of picking involves translating a 2D mouse coordinate position into a vector that is in world space. Mercifully, OpenGL allows the hardware to help us out. Yet another method involves shooting a pick ray through the mouse location and testing for intersections with the currently displayed objects. Ask the hardware to pretend it is drawing the scene. Would using the color id method be Introduction This tutorial is based on DigiBen 's Object Selection Tutorial. The strategy is simple: Tell the hardware that we are in picking (“selection”) mode. Tutorial 47: Picking Back to Tutorial Index Ive seen lots of tutorials (such as NeHe''s) on how to pick objects in 3D but i just want a simple way of picking 2d objects. mct22 y0ej crum oc ktfr b6qptea la1tx dq x309 o1t8