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//
// Description:
// SWFMatrix Class
//
// Authors:
// Jonathan Shore <jshore@e-shuppan.com>
//
// Copyright:
// Copyright 2001 E-Publishing Group Inc. Permission is granted to use or
// modify this code provided that the original copyright notice is included.
//
// This software is distributed with no warranty of liability, merchantability,
// or fitness for any specific purpose.
//
import SWFMovieClip;
import SWFMovie;
//
// SWFMatrix Interface
// a rotation, translation matrix
//
// Notes
// -
//
public class SWFMatrix {
public SWFMatrix ()
{
this.rot = 0f;
this.dx = 0f;
this.dy = 0f;
this.xscale = 1.0f;
this.yscale = 1.0f;
this.xskew = 0.0f;
this.yskew = 0.0f;
this.applied = false;
}
// accessors
public float getRotation ()
{ return rot; }
public void setRotation (float deg)
{ rot = deg; }
public float getDx ()
{ return dx; }
public void setDx (float dx)
{ this.dx = dx; }
public float getDy ()
{ return dy; }
public void setDy (float dy)
{ this.dy = dy; }
public float getXScale ()
{ return xscale; }
public void setXScale (float xscale)
{ this.xscale = xscale; }
public float getYScale ()
{ return yscale; }
public void setYScale (float yscale)
{ this.yscale = yscale; }
public float getXSkew ()
{ return xskew; }
public void setXSkew (float xskew)
{ this.xskew = xskew; }
public float getYSkew ()
{ return yskew; }
public void setYSkew (float yskew)
{ this.yskew = yskew; }
// apply methods
public void apply (SWFDisplayItemI item, boolean force)
{
if (applied && !force)
return;
else
applied = true;
if (NE (this.dx, 0.0f) || NE (this.dy, 0.0f))
item.move (dx, dy);
if (NE (this.xscale, 1.0f) || NE (this.yscale, 1.0f))
item.scaleTo (xscale, yscale);
if (NE (this.xskew, 0.0f))
item.skewX (xskew);
if (NE (this.yskew, 0.0f))
item.skewY (yskew);
if (NE (this.rot, 0f))
item.rotate (rot);
}
public void apply (SWFDisplayItemI item)
{ apply (item, false); }
public boolean applied ()
{ return applied; }
// class methods
public static SWFMatrix identity()
{ return identity; }
private static boolean NE (float a, float b)
{ return Math.abs (a-b) < 1E-5; }
// variables
protected float dx;
protected float dy;
protected float xscale;
protected float yscale;
protected float xskew;
protected float yskew;
protected float rot;
protected boolean applied;
// class variables
protected static SWFMatrix identity;
static {
identity = new SWFMatrix();
identity.applied = true;
}
};
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