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RigidBody2D: add and bind get_inertia() method.

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You can't set this value very well, since it's automatically computed
from the mass and the collision shapes. But since the values are higher
than many people might suspect, so being able to read it helps estimate
the amount of torque you might need to apply.
This commit is contained in:
Josh Grams 2016-04-20 20:49:37 -04:00
parent dbabe4c07c
commit f7d31cec38
6 changed files with 30 additions and 4 deletions
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4
servers/physics_2d/body_2d_sw.cpp
View file

@ -186,6 +186,10 @@ float Body2DSW::get_param(Physics2DServer::BodyParameter p_param) const {
case Physics2DServer::BODY_PARAM_MASS: {
return mass;
} break;
case Physics2DServer::BODY_PARAM_INERTIA: {
if(_inv_inertia == 0) return INFINITY;
else return 1.0 / _inv_inertia;
} break;
case Physics2DServer::BODY_PARAM_GRAVITY_SCALE: {
return gravity_scale;
} break;

1
servers/physics_2d_server.cpp
View file

@ -677,6 +677,7 @@ void Physics2DServer::_bind_methods() {
BIND_CONSTANT( BODY_PARAM_BOUNCE );
BIND_CONSTANT( BODY_PARAM_FRICTION );
BIND_CONSTANT( BODY_PARAM_MASS );
BIND_CONSTANT( BODY_PARAM_INERTIA );
BIND_CONSTANT( BODY_PARAM_GRAVITY_SCALE );
BIND_CONSTANT( BODY_PARAM_LINEAR_DAMP);
BIND_CONSTANT( BODY_PARAM_ANGULAR_DAMP);

1
servers/physics_2d_server.h
View file

@ -421,6 +421,7 @@ public:
BODY_PARAM_BOUNCE,
BODY_PARAM_FRICTION,
BODY_PARAM_MASS, ///< unused for static, always infinite
BODY_PARAM_INERTIA, // read-only: computed from mass & shapes
BODY_PARAM_GRAVITY_SCALE,
BODY_PARAM_LINEAR_DAMP,
BODY_PARAM_ANGULAR_DAMP,