toxi.physics
Class VerletSpring

java.lang.Object
  toxi.physics.VerletSpring

Direct Known Subclasses:

VerletConstrainedSpring, VerletMinDistanceSpring

public class VerletSpring
extends java.lang.Object

A spring class connecting two VerletParticles in space. Based on the configuration of the spring instance and that of the physics engine, the behaviour of the spring can vary between springy and stiff/stick like.

The simulation takes particle weights into account and can be configured to lock either particle in space in order to force the other one to move. This is sometimes handy for resolving collisions (currently outside the scope of this library).

See Also:

VerletPhysics

Field Summary

VerletParticle	a Spring end points / particles
VerletParticle	b Spring end points / particles

Constructor Summary

VerletSpring(VerletParticle a, VerletParticle b, float len, float str)

Method Summary

float	getRestLength()
float	getStrength()
VerletSpring	lockA(boolean s) (Un)Locks the 1st end point of the spring.
VerletSpring	lockB(boolean s) (Un)Locks the 2nd end point of the spring
VerletSpring	setRestLength(float len)
VerletSpring	setStrength(float strength)

Methods inherited from class java.lang.Object

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

Field Detail

a

public VerletParticle a

Spring end points / particles

b

public VerletParticle b

Spring end points / particles

Constructor Detail

VerletSpring

public VerletSpring(VerletParticle a,
                    VerletParticle b,
                    float len,
                    float str)

Parameters:

a - 1st particle

b - 2nd particle

len - desired rest length

str - spring strength

Method Detail

getRestLength

public final float getRestLength()

getStrength

public final float getStrength()

lockA

public VerletSpring lockA(boolean s)

(Un)Locks the 1st end point of the spring. NOTE: this acts purely within the scope of this spring instance and does NOT call VerletParticle.lock()

Parameters:

s -

Returns:

itself

lockB

public VerletSpring lockB(boolean s)

(Un)Locks the 2nd end point of the spring

Parameters:

s -

Returns:

itself

setRestLength

public VerletSpring setRestLength(float len)

setStrength

public VerletSpring setStrength(float strength)