Triangle.h

/***************************************************************************
 *   This file is part of OpenCAL: Open Computer Animation Library         *
 *   I created OpenCAL as my master's thesis Computer Science (multimedia) *
 *   at the tUL university in Diepenbeek, Belgium                          *
 *                                                                         *
 *   Copyright (C) 2003-2004 by Jeroen Dierckx                             *
 *   jeroen.dierckx@student.luc.ac.be                                      *
 *                                                                         *
 ***************************************************************************/

#ifndef OPENCAL_TRIANGLE_H
#define OPENCAL_TRIANGLE_H

// Includes
#include <OpenCAL/global.h>

#include <OpenCAL/Vector3.h>
using OpenCAL::Utils::Vector3;
#include <OpenCAL/Material.h>
using OpenCAL::Utils::Material;
#include <OpenCAL/Texture.h>
using OpenCAL::Utils::Texture;


namespace OpenCAL
{
    // Forward declarations
    class Vertex;

    class OPENCAL_API Triangle
    {
    protected:
        // Member variables
        Vertex *m_vertices[3];
        Vector3 m_normal;
        bool m_normalValid;
        Material *m_material;

    public:
        // Constructors and destructor
        //Triangle();
        Triangle(Vertex *a, Vertex *b, Vertex *c);
        virtual ~Triangle();

        // Get functions
        Vertex *getVertex(unsigned int i) { return m_vertices[i]; }
        const Vertex *getVertex(unsigned int i) const { return m_vertices[i]; }
        const Vector3 &getNormal();
        bool isNormalValid() const { return m_normalValid; }
        const Material *getMaterial() const { return m_material; }
        Material *getMaterial() { return m_material; }
        bool hasMaterial() const { return (m_material != 0); }

        // Set functions
        void setMaterial(Material *material) { m_material = material; }

        // Other functions
        void invalidateNormal() { m_normalValid = false; }
        void calculateNormal();
        float getArea() const;
        Vector3 getMidpoint() const;
    };
}

#endif // OPENCAL_TRIANGLE_H

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