EstimateCollisionResponse.h File Reference

#include <Jolt/Physics/Collision/ContactListener.h>

Go to the source code of this file.

Classes
struct	CollisionEstimationResult
	A structure that contains the estimated contact and friction impulses and the resulting body velocities. More...
struct	CollisionEstimationResult::Impulse

Functions
JPH_EXPORT void	EstimateCollisionResponse (const Body &inBody1, const Body &inBody2, const ContactManifold &inManifold, CollisionEstimationResult &outResult, float inCombinedFriction, float inCombinedRestitution, float inMinVelocityForRestitution=1.0f, uint inNumIterations=10)

Function Documentation

EstimateCollisionResponse()

JPH_EXPORT void EstimateCollisionResponse	(	const Body &	inBody1,
		const Body &	inBody2,
		const ContactManifold &	inManifold,
		CollisionEstimationResult &	outResult,
		float	inCombinedFriction,
		float	inCombinedRestitution,
		float	inMinVelocityForRestitution = 1.0f,
		uint	inNumIterations = 10 )

This function estimates the contact impulses and body velocity changes as a result of a collision. It can be used in the ContactListener::OnContactAdded to determine the strength of the collision to e.g. play a sound or trigger a particle system. This function is accurate when two bodies collide but will not be accurate when more than 2 bodies collide at the same time as it does not know about these other collisions.

Parameters

inBody1	Colliding body 1
inBody2	Colliding body 2
inManifold	The collision manifold
outResult	A structure that contains the estimated contact and friction impulses and the resulting body velocities
inCombinedFriction	The combined friction of body 1 and body 2 (see ContactSettings::mCombinedFriction)
inCombinedRestitution	The combined restitution of body 1 and body 2 (see ContactSettings::mCombinedRestitution)
inMinVelocityForRestitution	Minimal velocity required for restitution to be applied (see PhysicsSettings::mMinVelocityForRestitution)
inNumIterations	Number of iterations to use for the impulse estimation (see PhysicsSettings::mNumVelocitySteps, note you can probably use a lower number for a decent estimate). If you set the number of iterations to 1 then no friction will be calculated.