1/**
2 * Copyright (c) 2011, Novyon Events
3 *
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * - Redistributions of source code must retain the above copyright notice, this
10 * list of conditions and the following disclaimer.
11 *
12 * - Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
25 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
26 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * @author Anthyon
29 */
30package com.jme3.terrain.noise.basis;
31
32import java.nio.FloatBuffer;
33import java.util.ArrayList;
34import java.util.List;
35
36import com.jme3.terrain.noise.Basis;
37import com.jme3.terrain.noise.filter.AbstractFilter;
38import com.jme3.terrain.noise.modulator.Modulator;
39
40public class FilteredBasis extends AbstractFilter implements Basis {
41
42	private Basis basis;
43	private List<Modulator> modulators = new ArrayList<Modulator>();
44	private float scale;
45
46	public FilteredBasis() {}
47
48	public FilteredBasis(Basis basis) {
49		this.basis = basis;
50	}
51
52	public Basis getBasis() {
53		return this.basis;
54	}
55
56	public void setBasis(Basis basis) {
57		this.basis = basis;
58	}
59
60	@Override
61	public FloatBuffer filter(float sx, float sy, float base, FloatBuffer data, int size) {
62		return data;
63	}
64
65	@Override
66	public void init() {
67		this.basis.init();
68	}
69
70	@Override
71	public Basis setScale(float scale) {
72		this.scale = scale;
73		return this;
74	}
75
76	@Override
77	public float getScale() {
78		return this.scale;
79	}
80
81	@Override
82	public Basis addModulator(Modulator modulator) {
83		this.modulators.add(modulator);
84		return this;
85	}
86
87	@Override
88	public float value(float x, float y, float z) {
89		throw new UnsupportedOperationException(
90				"Method value cannot be called on FilteredBasis and its descendants. Use getBuffer instead!");
91	}
92
93	@Override
94	public FloatBuffer getBuffer(float sx, float sy, float base, int size) {
95		int margin = this.getMargin(size, 0);
96		int workSize = size + 2 * margin;
97		FloatBuffer retval = this.basis.getBuffer(sx - margin, sy - margin, base, workSize);
98		return this.clip(this.doFilter(sx, sy, base, retval, workSize), workSize, size, margin);
99	}
100
101	public FloatBuffer clip(FloatBuffer buf, int origSize, int newSize, int offset) {
102		FloatBuffer result = FloatBuffer.allocate(newSize * newSize);
103
104		float[] orig = buf.array();
105		for (int i = offset; i < offset + newSize; i++) {
106			result.put(orig, i * origSize + offset, newSize);
107		}
108
109		return result;
110	}
111}
112