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If don't run that algorithm too often (eg. just at startup-time) and there aren't thousands of rectangles, I'd probably just stick with the brute-force approach. You could already eliminate a lot of …

Classical 2D animations are created frame by frame. … Another, not so obvious option for 2D animation is using a 3D Program. Did you know that later episodes of Southpark were animated using Maya? …

Checking collision on circles should be easy and has been described very well by Valkea. If your entity amount doesn't go into the thousands, checking all collisions shouldn't be a performance problem …

Adobe Illustrator is a professional vector drawing tool. An open-source alternative would be Inkscape. If you'd like to animate the sprites too, there's some basic animation-support in Illustrator. A …

If you're dealing with discrete positions (eg. a tile-map or pixel based map), then an easy way to find the contours would be the Marching Squares algorithm (Wikipedia).

I don't know how the landscape in worms was implemented exactly, but I'm pretty sure they used a bitmap for the landscape (at least in the older games of the series). A very basic approach would be a …

I'm not an expert when it comes to ragdolls but when I think "2D fighting game" I imagine seeing the fighters from the side. …

To achieve such an effect, you can use a 3D Projection without perspective (called parallel projection). That will render all your objects at the same size and from the same angle, no matter where the …

Have a look at Tiled or OGMO Editor. These editors allow you to create your levels and can also write the level-data to XML. Parsing the XML data in Java should be rather simple. Alternatively you cou …

The Sutherland-Hodgman polygon clipping algorithm should work just fine for triangle vs. rectangle clipping. You'll find some more information about clipping algorithms here. Or just search for "Suthe …

The solution to your problem is actually quite simple. Instead of calculating the ratio, you calculate the possible movement-distances for camera and background and interpolate them. For the backgrou …

The game you linked to in your comment most likely uses a physics-engine like Box2D (flash port) for the car physics. So the basic steps are: Create a car body with connected wheels (use joints) and u …

While you could create some meta-data file that contains the anchor points for all your sprites, you should generally avoid having different anchor points for different sprites. There are some reason …

Pixel-art and bitmap-graphics isn't exactly the same. A bitmap (or raster-graphic) doesn't imply anything about the "style" of the image. It's just a bunch of pixels... Exporting from flash (or any ve …

Just parent them to the "Torso" (using Ctrl P and keep the offset). It doesn't look like a very flexible skeleton, especially the rotation on the leg bones is bad (they are twisted) .. that's someth …