Ragdolls are sketchy physics models of people or animals and robots that are not controllable but still have moving joints. They are often used as crash test dummies and taking your anger out on something by dropping a giant cone on it. Their name comes from real ragdolls or soft toy dolls because of the fact that real ones will flop around limp and this is what the SP equivalent does as well. Some are very simple and some may consist of many parts. Usually the most realistic ones are the ones with the most parts but this does not mean they are the most fun. Often those are the simplest ones and also create less effect on frame rate allowing for more objects in the environment around it.
While it varies for the other types, most humanoid ragdolls have the following independent moving parts. A few have more, but these are the most common.
- Upper Arm
- Waist (sometimes)
Despite being one of the oldest sketchyphysics designs, the ragdoll still has a variety of uses. They can be used as targets for guns, anger-management tools, or simply representations of people who can be "killed." Theoretically, adding onto the 2nd option, you could put the face of someone you don't like (i.e. an ex girlfriend/boyfriend, your boss) and bash them around especially hard.
Unfortunately, care must be taken to deal with these two issues. The first is hard to stop, while the 2nd is virtually impossible
- Seziures: Sometimes, after a ragdoll has fallen, it will start to spasm and twitch. Usually, this means that the joints are given too much freedom.
- Spaz-outs: If you throw a ragdoll around hard enough, (which actually isn't that hard) it will start to spin around violently. The joints will separate and it will become a an unusable vortex. This is due to the inherent complexity of a ragdoll, as every joint attempts to move back to its set position at once. It is possible to fix this using hidden mass.