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EPhysics: body damping set 

This patch introduces a function for rigid body damping.


Patch by: Leandro Dorileo <dorileo@profusion.mobi>



SVN revision: 73382
This commit is contained in:
Leandro Dorileo 2012-07-05 22:52:53 +00:00 committed by Bruno Dilly
parent c4d655f56b
commit 2afffbd809
2 changed files with 44 additions and 0 deletions
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31
legacy/ephysics/src/lib/EPhysics.h
View File

@ -1245,6 +1245,37 @@ EAPI double ephysics_body_angular_velocity_get(const EPhysics_Body *body);
*/
EAPI void ephysics_body_stop(EPhysics_Body *body);
/**
* @brief
* Set the angular and linear damping values.
*
* Damping(linear and angular) values are applied to body's linear and angular
* velocity.
*
* By applying a bodies damping factor the user will face a velocity reduction,
* with a force applied to it - like air resistance. The force is applied to
* slow it down. Different factors can be applied to angular and linear
* velocity to fine tune translation and rotation.
*
* The damping is a force synchronous with the velocity of the object but in
* opposite direction.
*
* Damping is specified as a value between 0 and 1, which is the proportion of
* velocity lost per second. If specified damping value - either for angular or
* linear - is greater or equal to 1, velocities are nulled(that means, will
* become 0 on every axis), resulting on a frozen body.
*
* Default linear damping is set to 0. The same is true for angular damping
* factor.
*
* @param body The physics body.
* @param linear_damping The linear damping force to apply on @p body.
* @param angular_damping The angular damping force to apply on @p body.
*
* @ingroup EPhysics_Body
*/
EAPI void ephysics_body_damping_set(EPhysics_Body *body, double linear_damping, double angular_damping);
/**
* @brief
* Update the evas object associated to the body.

13
legacy/ephysics/src/lib/ephysics_body.cpp
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@ -646,6 +646,19 @@ ephysics_body_stop(EPhysics_Body *body)
DBG("Body %p stopped", body);
}
EAPI void
ephysics_body_damping_set(EPhysics_Body *body, double linear_damping, double angular_damping)
{
if (!body)
{
ERR("Can't set body damping, body is null.");
return;
}
body->rigid_body->setDamping(btScalar(linear_damping),
btScalar(angular_damping));
}
EAPI void
ephysics_body_evas_object_update(EPhysics_Body *body)
{