toxi.physics2d
Class VerletSpring2D

java.lang.Object
  toxi.physics2d.VerletSpring2D

Direct Known Subclasses:

VerletConstrainedSpring2D, VerletMinDistanceSpring2D

public class VerletSpring2D
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

VerletParticle2D	a Spring end points / particles
VerletParticle2D	b Spring end points / particles

Constructor Summary

VerletSpring2D(VerletParticle2D a, VerletParticle2D b, float len, float str)

Method Summary

float	getRestLength()
float	getStrength()
VerletSpring2D	lockA(boolean s) (Un)Locks the 1st end point of the spring.
VerletSpring2D	lockB(boolean s) (Un)Locks the 2nd end point of the spring
VerletSpring2D	setRestLength(float len)
VerletSpring2D	setStrength(float strength)

Methods inherited from class java.lang.Object

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

Field Detail

a

public VerletParticle2D a

Spring end points / particles

b

public VerletParticle2D b

Spring end points / particles

Constructor Detail

VerletSpring2D

public VerletSpring2D(VerletParticle2D a,
                      VerletParticle2D b,
                      float len,
                      float str)

Parameters:

a - 1st particle

b - 2nd particle

len - desired rest length

str - spring strength

Method Detail

getRestLength

public float getRestLength()

getStrength

public float getStrength()

lockA

public VerletSpring2D 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 VerletParticle2D.lock()

Parameters:

s -

Returns:

itself

lockB

public VerletSpring2D lockB(boolean s)

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

Parameters:

s -

Returns:

itself

setRestLength

public VerletSpring2D setRestLength(float len)

setStrength

public VerletSpring2D setStrength(float strength)