Package org.jbox2d.collision

Class TimeOfImpact

java.lang.Object

org.jbox2d.collision.TimeOfImpact

public class TimeOfImpact
extends Object

Class used for computing the time of impact. This class should not be constructed usually, just retrieve from the WorldPool.getTimeOfImpact().

Author:

Daniel Murphy

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	TimeOfImpact.TOIInput	Input parameters for TOI (time of impact)
static class	TimeOfImpact.TOIOutput	Output parameters for TimeOfImpact
static enum	TimeOfImpact.TOIOutputState

Field Summary

Fields

Modifier and Type	Field	Description
static final int	MAX_ITERATIONS
static final int	MAX_ROOT_ITERATIONS
static int	toiCalls
static int	toiIters
static int	toiMaxIters
static int	toiMaxRootIters
static int	toiRootIters

Constructor Summary

Constructors

Constructor	Description
TimeOfImpact(WorldPool argPool)

Method Summary

Modifier and Type	Method	Description
final void	timeOfImpact(TimeOfImpact.TOIOutput output, TimeOfImpact.TOIInput input)	Compute the upper bound on time before two shapes penetrate.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

MAX_ITERATIONS

public static final int MAX_ITERATIONS

See Also:

• Constant Field Values

MAX_ROOT_ITERATIONS

public static final int MAX_ROOT_ITERATIONS

See Also:

• Constant Field Values

toiCalls

public static int toiCalls

toiIters

public static int toiIters

toiMaxIters

public static int toiMaxIters

toiRootIters

public static int toiRootIters

toiMaxRootIters

public static int toiMaxRootIters

Constructor Details

TimeOfImpact

public TimeOfImpact(WorldPool argPool)

Method Details

timeOfImpact

public final void timeOfImpact(TimeOfImpact.TOIOutput output,
 TimeOfImpact.TOIInput input)

Compute the upper bound on time before two shapes penetrate. Time is represented as a fraction between [0,tMax]. This uses a swept separating axis and may miss some intermediate, non-tunneling collision. If you change the time interval, you should call this function again. Note: use Distance to compute the contact point and normal at the time of impact.

CCD via the local separating axis method. This seeks progression by computing the largest time at which separation is maintained.

Repolink:

Github: erincatto/box2d src/collision/b2_time_of_impact.cpp Lines 258 - 490