All game objects which need to be intergrated will require three coords. I suggest storing a z coord with all your game objects anyway since this can be used for drawing your sprites in back to front order so that overlapping cases are drawn correctly. It can also be used for scaling sprites so that objects further away appear smaller. As long as your game world doesn't contain too much visual depth this should be sufficient.

With regards to getting the sprites on the screen, if you make your game world and game units (meters etc) correspond to the dimensions of your screen then you should be able to just directly map the coords to screen pixels. Else you will need to store the ratio from screen space to world space to find which pixels correspond to which x, y coords.

[edited by - motorherp on June 7, 2004 5:39:32 AM]