sub_arctic.anim
Class slow_in_slow_out

java.lang.Object
  |
  +--sub_arctic.anim.slow_in_slow_out

public class slow_in_slow_out

extends java.lang.Object

implements pacer

Implements the pacing function for a slow in slow out, ala the artkit pacing function of the same name. This function has two transition points, one for the end of the slow in and the other for the end of the slow out. These must be symmetrical, i.e. if you supply boundary value of 0.2 to the constructor the first 20% of the time will be slow in and the last 20% will be in the slow_out.

Field Summary

protected double	_boundary Where to end the slow in, and where to begin the slow out (although 1-_boundary is more correct for where to begin the slow out).
protected double	_val_at_boundary What is the amount of of time covered by the slow in and slow out?

Constructor Summary

slow_in_slow_out(double bnd, double val)
Construct a slow in slow out pacer.

Method Summary

double

pace(double t) Perform the transformation.

Methods inherited from class java.lang.Object

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

Field Detail

_boundary

protected double _boundary

Where to end the slow in, and where to begin the slow out (although 1-_boundary is more correct for where to begin the slow out).

_val_at_boundary

protected double _val_at_boundary

What is the amount of of time covered by the slow in and slow out?

Constructor Detail

slow_in_slow_out

public slow_in_slow_out(double bnd,
                        double val)

Construct a slow in slow out pacer.

Providing the values 0.2 and 0.4 to this constructor would cause the following to happen:

1. The first 40% of the actual time would be spent in the first 20% of the transition (slow in)
2. The middle part of the transition would occur, and would occupy 20% of the actual time
3. The final 40% of the actual time would be spent in the final 20% of the transition

Parameters:

double - bnd at what percent of the transition to end the slow in and (symmetrically) at what point from the end of the transition to begin the slow out.

double - val the value of the pacing function at the end of the slow-in (this is also symmetrical)

Method Detail

pace

public double pace(double t)

Perform the transformation.

Specified by:

pace in interface pacer

Parameters:

double - t the value to transform (time value from 0.0 to 1.0)

Returns:

double the transformed value under the slow-in-slow-out parameters