imeshbuilder.h

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/*
    Sheep - A Rigid Body Dynamics Engine
    Copyright (C) 2001-2004 Francois Beaune
    Contact: http://toxicengine.sourceforge.net/

    This file is part of Sheep.

    Sheep 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.

    Sheep 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 Sheep; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef SHEEP_MESHIO_IMESHBUILDER_H
#define SHEEP_MESHIO_IMESHBUILDER_H

#include "common/math/vector2.h"
#include "common/math/vector3.h"

#include <string>

namespace sheep {

    class IMeshBuilder {
    public:
        typedef int FeatureId;

        class IGeometryBuilder {
        public:
            //!\todo Ideally, the destructor should be pure virtual with empty body.
            virtual ~IGeometryBuilder() {}

            virtual void BeginSubMesh(const std::string &name) {}
            virtual void EndSubMesh() {}

            virtual FeatureId AppendVertex(const Vector3 &v) { return 0; }
            virtual FeatureId AppendNormal(const Vector3 &vn) { return 0; }
            virtual FeatureId AppendTexCoord(const Vector2 &vt) { return 0; }
            virtual FeatureId AppendFace(int n, const FeatureId *v) { return 0; }

            virtual void SetFaceNormals(FeatureId face, int n, const FeatureId *vn) {}
            virtual void SetFaceTexCoords(FeatureId face, int n, const FeatureId *vt) {}

            virtual void SetMaterial(FeatureId material) {}
        };

        class IMaterialBuilder {
        public:
            //!\todo Ideally, the destructor should be pure virtual with empty body.
            virtual ~IMaterialBuilder() {}

            virtual FeatureId BeginMaterial(const std::string &name) { return 0; }
            virtual void EndMaterial() {}

            virtual void SetAmbientColor(Real r, Real g, Real b) {}
            virtual void SetDiffuseColor(Real r, Real g, Real b) {}
            virtual void SetSpecularColor(Real r, Real g, Real b) {}

            //! 'texels' points to a temporary location containing texel data.
            virtual void SetTexture(int w, int h, const unsigned char *texels) {}   //!< 24-bit RGB format.
        };

        virtual ~IMeshBuilder() {}

        virtual IGeometryBuilder *GeometryBuilder() = 0;
        virtual IMaterialBuilder *MaterialBuilder() = 0;
    };

}

#endif  // !SHEEP_MESHIO_IMESHBUILDER_H

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