net.cscott.sdr.calls
Class DancerPath

java.lang.Object
  net.cscott.sdr.calls.DancerPath

public class DancerPath
extends Object

A DancerPath is the result of evaluating a call for a specific dancer in a formation. Unlike a Prim, a DancerPath is an absolute motion, and includes computed information about flow, roll, sweep, and timing.

The flow information we collect is based on Lynette Bellini's Rules of Flow, along with Dave Wilson's theories about dancer kinematics; to wit: certain "bad flow" motions actually work if there is hand contact between certain dancers, as it lets them push off of one another.

Version:

$Id: DancerPath.java,v 1.3 2007-03-07 22:05:29 cananian Exp $

Author:

C. Scott Ananian

Nested Class Summary

static class

DancerPath.PointOfRotation In order to have a method of discussing the various motions encountered in square dance choreography, Lynette Bellini identified several points of rotation: A single dancer: the point of rotation is about the center of a single dancer, as in the call roll.

Field Summary

Point	arcCenter The arcCenter can be null for straight paths.
Position	from The rotations on the to and from positions should be exact.
DancerPath.PointOfRotation	pointOfRotation The point of rotation, for flow computations.
Rotation	rollDir The rollDir and sweepDir may be zero.
Rotation	sweepDir The rollDir and sweepDir may be zero.
Fraction	time The time this motion should take.
Position	to The rotations on the to and from positions should be exact.

Constructor Summary

DancerPath(Position from, Position to, Point arcCenter, Fraction time, DancerPath.PointOfRotation pointOfRotation, Rotation rollDir, Rotation sweepDir)
Create an immutable DancerPath object.

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

from

public final Position from

The rotations on the to and from positions should be exact.

to

public final Position to

The rotations on the to and from positions should be exact.

arcCenter

public final Point arcCenter

The arcCenter can be null for straight paths.

time

public final Fraction time

The time this motion should take.

pointOfRotation

public final DancerPath.PointOfRotation pointOfRotation

The point of rotation, for flow computations. May be null for straight paths.

rollDir

public final Rotation rollDir

The rollDir and sweepDir may be zero.

sweepDir

public final Rotation sweepDir

The rollDir and sweepDir may be zero.

Constructor Detail

DancerPath

public DancerPath(Position from,
                  Position to,
                  Point arcCenter,
                  Fraction time,
                  DancerPath.PointOfRotation pointOfRotation,
                  Rotation rollDir,
                  Rotation sweepDir)

Create an immutable DancerPath object.