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/*
* Copyright (c) 2009-2010 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.math;
import com.jme3.export.*;
import java.io.IOException;
/**
*
* <code>Rectangle</code> defines a finite plane within three dimensional space
* that is specified via three points (A, B, C). These three points define a
* triangle with the forth point defining the rectangle ((B + C) - A.
*
* @author Mark Powell
* @author Joshua Slack
*/
public final class Rectangle implements Savable, Cloneable, java.io.Serializable {
static final long serialVersionUID = 1;
private Vector3f a, b, c;
/**
* Constructor creates a new <code>Rectangle</code> with no defined corners.
* A, B, and C must be set to define a valid rectangle.
*
*/
public Rectangle() {
a = new Vector3f();
b = new Vector3f();
c = new Vector3f();
}
/**
* Constructor creates a new <code>Rectangle</code> with defined A, B, and C
* points that define the area of the rectangle.
*
* @param a
* the first corner of the rectangle.
* @param b
* the second corner of the rectangle.
* @param c
* the third corner of the rectangle.
*/
public Rectangle(Vector3f a, Vector3f b, Vector3f c) {
this.a = a;
this.b = b;
this.c = c;
}
/**
* <code>getA</code> returns the first point of the rectangle.
*
* @return the first point of the rectangle.
*/
public Vector3f getA() {
return a;
}
/**
* <code>setA</code> sets the first point of the rectangle.
*
* @param a
* the first point of the rectangle.
*/
public void setA(Vector3f a) {
this.a = a;
}
/**
* <code>getB</code> returns the second point of the rectangle.
*
* @return the second point of the rectangle.
*/
public Vector3f getB() {
return b;
}
/**
* <code>setB</code> sets the second point of the rectangle.
*
* @param b
* the second point of the rectangle.
*/
public void setB(Vector3f b) {
this.b = b;
}
/**
* <code>getC</code> returns the third point of the rectangle.
*
* @return the third point of the rectangle.
*/
public Vector3f getC() {
return c;
}
/**
* <code>setC</code> sets the third point of the rectangle.
*
* @param c
* the third point of the rectangle.
*/
public void setC(Vector3f c) {
this.c = c;
}
/**
* <code>random</code> returns a random point within the plane defined by:
* A, B, C, and (B + C) - A.
*
* @return a random point within the rectangle.
*/
public Vector3f random() {
return random(null);
}
/**
* <code>random</code> returns a random point within the plane defined by:
* A, B, C, and (B + C) - A.
*
* @param result
* Vector to store result in
* @return a random point within the rectangle.
*/
public Vector3f random(Vector3f result) {
if (result == null) {
result = new Vector3f();
}
float s = FastMath.nextRandomFloat();
float t = FastMath.nextRandomFloat();
float aMod = 1.0f - s - t;
result.set(a.mult(aMod).addLocal(b.mult(s).addLocal(c.mult(t))));
return result;
}
public void write(JmeExporter e) throws IOException {
OutputCapsule capsule = e.getCapsule(this);
capsule.write(a, "a", Vector3f.ZERO);
capsule.write(b, "b", Vector3f.ZERO);
capsule.write(c, "c", Vector3f.ZERO);
}
public void read(JmeImporter e) throws IOException {
InputCapsule capsule = e.getCapsule(this);
a = (Vector3f) capsule.readSavable("a", Vector3f.ZERO.clone());
b = (Vector3f) capsule.readSavable("b", Vector3f.ZERO.clone());
c = (Vector3f) capsule.readSavable("c", Vector3f.ZERO.clone());
}
@Override
public Rectangle clone() {
try {
Rectangle r = (Rectangle) super.clone();
r.a = a.clone();
r.b = b.clone();
r.c = c.clone();
return r;
} catch (CloneNotSupportedException e) {
throw new AssertionError();
}
}
}
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