be.saltwater.jaqel.scheduler
Class WeightCalculator

java.lang.Object
  be.saltwater.jaqel.scheduler.WeightCalculator

public class WeightCalculator

extends java.lang.Object

Calculates an array of doubles of which the sum is always 1.0. From here on this resulting array will be called the weights. The only input of the function that calculates these weights is the value of an javax.media.j3d.Alpha object. The alpha value is divided into a number of steps. This is equal to to length of the weight array. Each weight rises from 0 to 1 and then drops again from 1 to 0. When a weight is dropping, the next weight is rising. This creates a wave-like effect that can be used a input for the javax.media.j3d.Morph class. When the alpha value is 0, weight[0] is 1.0. When alpha has reached 1.0, weight[0] is 1.0 again. Because of this, it can be used for looped animations.

Alpha:  
  0----->------->------>-----1 
Weights: 
  \  /\  /\  /\  /\  /\  /\  / 
   \/  \/  \/  \/  \/  \/  \/ 
[0] [1] [2] [3] [4] [..]     [0] 
                      [steps-1]

Author:

Bruno Windels

Constructor Summary

WeightCalculator(javax.media.j3d.Alpha duration, int steps)
Constucts a new WeightBehavior with "steps" steps.

Method Summary

void	calculateWeights() Calculates and returns the weights according to the alpha value.
int	getIndex()
int	getNextIndex()
double[]	getWeights()

Methods inherited from class java.lang.Object

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

Constructor Detail

WeightCalculator

public WeightCalculator(javax.media.j3d.Alpha duration,
                        int steps)

Constucts a new WeightBehavior with "steps" steps.

Method Detail

getWeights

public double[] getWeights()

calculateWeights

public void calculateWeights()

Calculates and returns the weights according to the alpha value. This should be used by subclasses to get the current weights.

getIndex

public int getIndex()

getNextIndex

public int getNextIndex()