LOD_MeshBounds.h

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef NAN_INCLUDED_MeshBounds_h
#define NAN_INCLUDED_MeshBounds_h

#include "MEM_SmartPtr.h"
#include "LOD_MeshPrimitives.h"
#include "LOD_ManMesh2.h"
#include "MT_assert.h"

// simple class to compute the mesh bounds of a manifold mesh,

class LOD_MeshBounds {

public :
    static
        LOD_MeshBounds *
    New(
    ){

        MEM_SmartPtr<LOD_MeshBounds> output(new LOD_MeshBounds());      
        return output.Release();
    }

        void
    ComputeBounds(
        const LOD_ManMesh2 * mesh
    ){
        MT_assert(mesh!=NULL);
        MT_assert(mesh->VertexSet().size() > 0);

        const std::vector<LOD_Vertex> &verts = mesh->VertexSet(); 
        
        m_min = verts[0].pos;
        m_max = verts[0].pos;

        // iterate through the verts

        int t;
        const int size = verts.size();

        for (t=1; t< size ; ++t) {

            UpdateBounds(verts[t].pos,m_min,m_max);
        }
    }
                
        MT_Vector3
    Min(
    ) const {
        return m_min;
    }

        MT_Vector3
    Max(
    ) const {
        return m_max;
    }

private :

        void
    UpdateBounds(
        MT_Vector3 vertex,
        MT_Vector3& min,
        MT_Vector3& max
    ) {
        if (vertex.x() < min.x()) {
            min.x() = vertex.x();
        } else
        if (vertex.x() > max.x()) {
            max.x()= vertex.x();
        }

        if (vertex.y() < min.y()) {
            min.y() = vertex.y();
        } else
        if (vertex.y() > max.y()) {
            max.y()= vertex.y();
        }

        if (vertex.z() < min.z()) {
            min.z() = vertex.z();
        } else
        if (vertex.z() > max.z()) {
            max.z()= vertex.z();
        }
    }

    LOD_MeshBounds(
    ) :
        m_min(0,0,0),
        m_max(0,0,0)
    {
    };
            
    MT_Vector3 m_min;
    MT_Vector3 m_max;

};

#endif