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Merge branch 'master' of github.com:highfidelity/hifi into bullet-constraints-4

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Seth Alves 2017-04-29 08:04:31 -07:00
commit e2e9371e96
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8
libraries/entities/src/EntityDynamicInterface.cpp
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@ -49,20 +49,20 @@
An dynamic is a callback which is registered with bullet. An dynamic is called-back every physics A dynamic is a callback which is registered with bullet. A dynamic is called-back every physics
simulation step and can do whatever it wants with the various datastructures it has available. An simulation step and can do whatever it wants with the various datastructures it has available. An
dynamic, for example, can pull an EntityItem toward a point as if that EntityItem were connected to that dynamic, for example, can pull an EntityItem toward a point as if that EntityItem were connected to that
point by a spring. point by a spring.
In this system, an dynamic is a property of an EntityItem (rather, an EntityItem has a property which In this system, a dynamic is a property of an EntityItem (rather, an EntityItem has a property which
encodes a list of dynamics). Each dynamic has a type and some arguments. Dynamics can be created by a encodes a list of dynamics). Each dynamic has a type and some arguments. Dynamics can be created by a
script or when receiving information via an EntityTree data-stream (either over the network or from an script or when receiving information via an EntityTree data-stream (either over the network or from an
svo file). svo file).
In the interface, if an EntityItem has dynamics, this EntityItem will have pointers to ObjectDynamic In the interface, if an EntityItem has dynamics, this EntityItem will have pointers to ObjectDynamic
subclass (like ObjectDynamicSpring) instantiations. Code in the entities library affects an dynamic-object subclass (like ObjectDynamicSpring) instantiations. Code in the entities library affects a dynamic-object
via the EntityDynamicInterface (which knows nothing about bullet). When the ObjectDynamic subclass via the EntityDynamicInterface (which knows nothing about bullet). When the ObjectDynamic subclass
instance is created, it is registered as an dynamic with bullet. Bullet will call into code in this instance is created, it is registered as a dynamic with bullet. Bullet will call into code in this
instance with the btDynamicInterface every physics-simulation step. instance with the btDynamicInterface every physics-simulation step.
Because the dynamic can exist next to the interface's EntityTree or the entity-server's EntityTree, Because the dynamic can exist next to the interface's EntityTree or the entity-server's EntityTree,