MeshShapeData.h

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/*************************************************************************
 *                                                                       *
 * Open Physics Abstraction Layer                                        *
 * Copyright (C) 2004-2005                                               *
 * Alan Fischer  alan.fischer@gmail.com                                  *
 * Andres Reinot  andres@reinot.com                                      *
 * Tyler Streeter  tylerstreeter@gmail.com                               *
 * All rights reserved.                                                  *
 * Web: opal.sourceforge.net                                             *
 *                                                                       *
 * This library is free software; you can redistribute it and/or         *
 * modify it under the terms of EITHER:                                  *
 *   (1) The GNU Lesser General Public License as published by the Free  *
 *       Software Foundation; either version 2.1 of the License, or (at  *
 *       your option) any later version. The text of the GNU Lesser      *
 *       General Public License is included with this library in the     *
 *       file license-LGPL.txt.                                          *
 *   (2) The BSD-style license that is included with this library in     *
 *       the file license-BSD.txt.                                       *
 *                                                                       *
 * This library 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 files    *
 * license-LGPL.txt and license-BSD.txt for more details.                *
 *                                                                       *
 *************************************************************************/

#ifndef OPAL_MESH_SHAPE_DATA_H
#define OPAL_MESH_SHAPE_DATA_H

#include "Defines.h"
#include "ShapeData.h"

namespace opal
{
        class MeshShapeData : public ShapeData
        {
        public:
                OPAL_DECL MeshShapeData()
                : ShapeData()
                {
                        mType = MESH_SHAPE;
                        vertexArray = NULL;
                        numVertices = 0;
                        triangleArray = NULL;
                        numTriangles = 0;

                        for (unsigned int i = 0; i < 6; ++i)
                        {
                                localAABB[i] = 0;
                        }
                }

                OPAL_DECL MeshShapeData(const MeshShapeData& data)
                {
                        (*this) = data;
                }

                OPAL_DECL virtual ~MeshShapeData()
                {
                }

                OPAL_DECL virtual void OPAL_CALL operator=(const MeshShapeData& data)
                {
                        mType = data.mType;
                        offset = data.offset;
                        material = data.material;
                        contactGroup = data.contactGroup;
                        vertexArray = data.vertexArray;
                        numVertices = data.numVertices;
                        triangleArray = data.triangleArray;
                        numTriangles = data.numTriangles;

                        for (unsigned int i = 0; i < 6; ++i)
                        {
                                localAABB[i] = data.localAABB[i];
                        }
                }

                OPAL_DECL virtual void OPAL_CALL getLocalAABB(real aabb[6])
                {
                        // Compute the AABB from the vertex data.
                        if (vertexArray)
                        {
                                for (unsigned int i = 0; i < numVertices; ++i)
                                {
                                        unsigned int vertexIndex = i * 3;

                                        // Check x component.
                                        if (vertexArray[vertexIndex] < localAABB[0])
                                        {
                                                localAABB[0] = vertexArray[vertexIndex];
                                        }
                                        else if (vertexArray[vertexIndex] > localAABB[1])
                                        {
                                                localAABB[1] = vertexArray[vertexIndex];
                                        }

                                        // Check y component.
                                        if (vertexArray[vertexIndex + 1] < localAABB[2])
                                        {
                                                localAABB[2] = vertexArray[vertexIndex + 1];
                                        }
                                        else if (vertexArray[vertexIndex + 1] > localAABB[3])
                                        {
                                                localAABB[3] = vertexArray[vertexIndex + 1];
                                        }

                                        // Check z component.
                                        if (vertexArray[vertexIndex + 2] < localAABB[4])
                                        {
                                                localAABB[4] = vertexArray[vertexIndex + 2];
                                        }
                                        else if (vertexArray[vertexIndex + 2] > localAABB[5])
                                        {
                                                localAABB[5] = vertexArray[vertexIndex+ 2];
                                        }
                                }
                        }

                        for (unsigned int i = 0; i < 6; ++i)
                        {
                                aabb[i] = localAABB[i];
                        }
                }

                real* vertexArray;

                unsigned int numVertices;

                unsigned int* triangleArray;

                unsigned int numTriangles;

        protected:
                real localAABB[6];

        private:
        };
}

#endif

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