The default shape is the first collisionmesh setting and by far the most common.
Unlike the other shapes the default relies on internal groups/shapes, and its collision mesh will be a combination of all the shapes/groups internal shapes. E.g. If you make a floor with 3 boxes, group them together and set it to default shape, the group will then have the combined collision mesh of the 3 boxes. This means that almost all complex objects have at least several "default" subgroups.
If the default shape group contains non-grouped entities(lines, faces,...) it will act as a box shape.
Benefits of the default shape
The default shape allows the user to create complex models that have accurate collision parameters, allowing for a more realistic experience.
In comparison to staticmesh floors the default shapes ensure a quick simulation startup, and usualy alot simpler collision mesh that will let the simulation run faster, while still allowing it to move freely.
|Joints Slider • Piston • Hinge • Servo • Motor • Gyro • Fixed • Corkscrew • Spring • Ball • Universal • Gears|
|States Static • Frozen • Ignore • NoCollision • ShowCollision • NoAutoFreeze • Magnetic|
|Properties Magnet • Thruster • Emitter • OnTouch • OnTick|
|Shapes default • box • sphere • cylinder • cone • capsule • chamfer • convexhull • staticmesh|