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/*
* Copyright (C) 2003, 2004 Jason Bevins (original libnoise code)
* Copyright 2010 Thomas J. Hodge (java port of libnoise)
*
* This file is part of libnoiseforjava.
*
* libnoiseforjava is a Java port of the C++ library libnoise, which may be found at
* http://libnoise.sourceforge.net/. libnoise was developed by Jason Bevins, who may be
* contacted at jlbezigvins@gmzigail.com (for great email, take off every 'zig').
* Porting to Java was done by Thomas Hodge, who may be contacted at
* libnoisezagforjava@gzagmail.com (remove every 'zag').
*
* libnoiseforjava is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later version.
*
* libnoiseforjava is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* libnoiseforjava. If not, see <http://www.gnu.org/licenses/>.
*
*/
package libnoiseforjava.util;
import libnoiseforjava.exception.ExceptionInvalidParam;
public class NoiseMap
{
/// Implements a noise map, a 2-dimensional array of floating-point
/// values.
///
/// A noise map is designed to store coherent-noise values generated by a
/// noise module, although it can store values from any source. A noise
/// map is often used as a terrain height map or a grayscale texture.
///
/// The size (width and height) of the noise map can be specified during
/// object construction.
///
/// The getValue() method can be used to access individual
/// values stored in the noise map.
///
/// The height of the noise map.
int height;
/// The width of the noise map.
int width;
/// The array of doubles holding the noise map values
double[][] noiseMap;
double borderValue;
public NoiseMap (int width, int height) throws ExceptionInvalidParam
{
setSize (width, height);
noiseMap = new double [width][height];
borderValue = 0.0;
}
/// Returns a value from the specified position in the noise map.
///
/// @param x The x coordinate of the position.
/// @param y The y coordinate of the position.
///
/// @returns The value at that position.
///
/// This method returns the border value if the coordinates exist
/// outside of the noise map.
public double getValue (int x, int y)
{
if (x >= 0 && x < width && y >= 0 && y < height)
return noiseMap[x] [y];
// The coordinates specified are outside the noise map. Return the border
// value.
else
return borderValue;
}
public void setSize (int width, int height) throws ExceptionInvalidParam
{
if (width < 1 || height < 1)
// Invalid width or height.
throw new ExceptionInvalidParam ("Invalid parameter in NoiseMap");
else
{
this.width = width;
this.height = height;
}
}
/// Sets a value at a specified position in the noise map.
///
/// @param x The x coordinate of the position.
/// @param y The y coordinate of the position.
/// @param value The value to set at the given position.
///
/// This method does nothing if the noise map object is empty or the
/// position is outside the bounds of the noise map.
public void setValue (int x, int y, double value)
{
if (x >= 0 && x < width && y >= 0 && y < height)
this.noiseMap[x][y]= value;
}
/// Returns the value used for all positions outside of the noise map.
///
/// @returns The value used for all positions outside of the noise
/// map.
///
/// All positions outside of the noise map are assumed to have a
/// common value known as the <i>border value</i>.
public double getBorderValue ()
{
return borderValue;
}
/// Returns the height of the noise map.
///
/// @returns The height of the noise map.
public int getHeight ()
{
return height;
}
/// Returns the width of the noise map.
///
/// @returns The width of the noise map.
public int getWidth ()
{
return width;
}
/// Sets the value to use for all positions outside of the noise map.
///
/// @param borderValue The value to use for all positions outside of
/// the noise map.
///
/// All positions outside of the noise map are assumed to have a
/// common value known as the <i>border value</i>.
public void setBorderValue (double borderValue)
{
this.borderValue = borderValue;
}
public double[][] getNoiseMap() {
return noiseMap;
}
public void setNoiseMap(double[][] noiseMap) {
this.noiseMap = noiseMap;
}
}
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