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Practical Fluid Mechanics Very detailed explanation with C++ code and pre-compiled binary. You can interact with the demo, like creating new smoke and stirring the smoke with your mouse. The imag …

velocity p += v // velocity is the rate of change in position where: a = acceleration, v = velocity, p = position F = force, m = mass (Note m is the only scalar value; F, a, v, and p are all 2D … I answered a related question on StackOverflow: 2D Spaceship movement math. There is some sample code in that answer. …

How do most games manage the two different 2D coordinate systems? There are two main types of coordinates (screen vs. … Background: I originally made the world coordinates in my game match the 2D screen coordinate convention. …

Conserve your precious CPU/GPU cycles! You can inexpensively approximate rain (and rain splats) without using particles. The rain drops and splats don't even have to move or be aligned! Basically, ran …

OK, I figured out why the XNA AppHub platformer demo doesn't have the "jumping" bug: the demo tests the collision tiles from top to bottom. When up against a "wall" the player may be overlapping multi …

You are manipulating the sprite, but not the underlying body. The sprite affects the visual appearance while the body affects the physics behavior. There are a number of ways you can fix this: Qui …

The levels themselves have a collision layer covered up with graphical tiles: And I personally don't recommend it, but a 2D demo program for Allegro used some type of 3D modeling format and converted … (It was a 2D physics-based skate boarding game.) To edit the level data of the Allegro demo game, we use the free and open source tool Blender. …