PrimitiveGroup.java

/**
 * Copyright (c) 2003-2009, Xith3D Project Group all rights reserved.
 * 
 * Portions based on the Java3D interface, Copyright by Sun Microsystems.
 * Many thanks to the developers of Java3D and Sun Microsystems for their
 * innovation and design.
 * 
 * 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 the 'Xith3D Project Group' 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) A
 * RISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE
 */
package org.xith3d.utility.geometry.nvtristrip;

/**
 * @author YVG
 */
public class PrimitiveGroup
{
    public static final int PT_LIST = 0;
    public static final int PT_STRIP = 1;
    public static final int PT_FAN = 2;
    
    public int type;
    public int[] indices;
    public int numIndices;
    
    public PrimitiveGroup()
    {
        type = PT_STRIP;
    }
    
    public String getTypeString()
    {
        switch ( type )
        {
            case PT_LIST:
                return "list";
            case PT_STRIP:
                return "strip";
            case PT_FAN:
                return "fan";
            default:
                return "????";
        }
    }
    
    @Override
    public String toString()
    {
        return getTypeString() + " : " + numIndices;
    }
    
    public String getFullInfo()
    {
        if ( type != PT_STRIP )
            return toString();
        
        int[] stripLengths = new int[ numIndices ];
        
        int prev = -1;
        int length = -1;
        for ( int i = 0; i < numIndices; i++ )
        {
            if ( indices[ i ] == prev )
            {
                stripLengths[ length ]++;
                length = -1;
                prev = -1;
            }
            else
            {
                prev = indices[ i ];
                length++;
            }
        }
        stripLengths[ length ]++;
        
        StringBuffer sb = new StringBuffer();
        sb.append( "Strip:" ).append( numIndices ).append( "\n" );
        for ( int i = 0; i < stripLengths.length; i++ )
        {
            if ( stripLengths[ i ] > 0 )
            {
                sb.append( i ).append( "->" ).append( stripLengths[ i ] ).append( "\n" );
            }
        }
        return sb.toString();
    }
    
    public int[] getTrimmedIndices()
    {
        if ( indices.length == numIndices )
            return indices;
        int[] nind = new int[ numIndices ];
        System.arraycopy( indices, 0, nind, 0, numIndices );
        return nind;
    }
}