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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.scene.debug;
import com.jme3.scene.Mesh;
import com.jme3.scene.Mesh.Mode;
import com.jme3.scene.VertexBuffer.Type;
import com.jme3.util.BufferUtils;
import java.nio.FloatBuffer;
import java.nio.ShortBuffer;
/**
* Simple grid shape.
*
* @author Kirill Vainer
*/
public class Grid extends Mesh {
/**
* Creates a grid debug shape.
* @param xLines
* @param yLines
* @param lineDist
*/
public Grid(int xLines, int yLines, float lineDist){
xLines -= 2;
yLines -= 2;
int lineCount = xLines + yLines + 4;
FloatBuffer fpb = BufferUtils.createFloatBuffer(6 * lineCount);
ShortBuffer sib = BufferUtils.createShortBuffer(2 * lineCount);
float xLineLen = (yLines + 1) * lineDist;
float yLineLen = (xLines + 1) * lineDist;
int curIndex = 0;
// add lines along X
for (int i = 0; i < xLines + 2; i++){
float y = (i) * lineDist;
// positions
fpb.put(0) .put(0).put(y);
fpb.put(xLineLen).put(0).put(y);
// indices
sib.put( (short) (curIndex++) );
sib.put( (short) (curIndex++) );
}
// add lines along Y
for (int i = 0; i < yLines + 2; i++){
float x = (i) * lineDist;
// positions
fpb.put(x).put(0).put(0);
fpb.put(x).put(0).put(yLineLen);
// indices
sib.put( (short) (curIndex++) );
sib.put( (short) (curIndex++) );
}
fpb.flip();
sib.flip();
setBuffer(Type.Position, 3, fpb);
setBuffer(Type.Index, 2, sib);
setMode(Mode.Lines);
updateBound();
updateCounts();
}
}
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