by damian » Apr 26, 2003 @ 2:00am
No, James. Doom used raycasting, which is a technique where all the walls are drawn by vertical line. First, the floor pixels are drawn, with the proper measures taken for textures; then, the wall pixels, and then the ceiling pixels. The monsters/weapons/rockets/powerups/dead guys/skulls/whatever are then drawn as sprites, with the necessary scaling done. That's it. No triangles involved. Of course, this tech has its limits; looking up/down, for example, causes great distortion. Play zdoom and you'll see.
In real 3D, triangles (everything's made of triangles) are oriented, scaled, and then drawn.
Big difference there...
Oh, I KNOW! Try zdoom, and then jDoom, and compare the differences. Turn mouselook on preferrably.