te_light.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef TETRAEDGE_TE_TE_LIGHT_H
#define TETRAEDGE_TE_TE_LIGHT_H

#include "tetraedge/te/te_vector3f32.h"
#include "tetraedge/te/te_vector2f32.h"
#include "tetraedge/te/te_color.h"

namespace Tetraedge {

enum TeLightType {
    LightTypePoint = 0,
    LightTypeDirectional = 1,
    LightTypeSpot = 2
};

class TeCamera;

class TeLight {
public:
    TeLight();
    virtual ~TeLight() {};

    TeVector3f32 directionVector() const;
    virtual void disable(uint lightno) = 0;
    virtual void enable(uint lightno) = 0;

    virtual void draw(TeCamera &camera) = 0;

    void transformDirPoint(const TeVector3f32 &pt1, TeVector3f32 &pt2);
    void transformSpotPoint(TeVector3f32 &pt1);

    virtual void update(uint lightno) = 0;
    static void setGlobalAmbient(const TeColor &col) { _globalAmbientColor = col.getPacked32(); }
    static TeColor globalAmbient() { return TeColor(_globalAmbientColor); }

    void setSpecular(const TeColor &col) { _colSpecular = col; }
    void setDiffuse(const TeColor &col) { _colDiffuse = col; }
    void setAmbient(const TeColor &col) { _colAmbient = col; }

    void setConstAtten(float val) { _constAtten = val; }
    void setLinearAtten(float val) { _linearAtten = val; }
    void setQuadraticAtten(float val) { _quadraticAtten = val; }
    void setCutoff(float val) { _cutoff = val; }
    void setExponent(float val) { _exponent = val; }
    void setDisplaySize(float val) { _displaySize = val; }
    void setPosition3d(const TeVector3f32 &pos) { _position3d = pos; }
    void setPositionRadial(const TeVector2f32 &pos) { _positionRadial = pos; }
    void setType(TeLightType ltype) { _type = ltype; }

    const TeVector2f32 &positionRadial() const { return _positionRadial; }
    const TeVector3f32 &position3d() const { return _position3d; }

    Common::String dump() const;
    void correctAttenuation();

    static TeLight *makeInstance();

protected:
    TeVector3f32 _position3d;
    TeVector2f32 _positionRadial;

    TeColor _colAmbient;
    TeColor _colDiffuse;
    TeColor _colSpecular;

    enum TeLightType _type;

    static uint32 _globalAmbientColor;

    float _constAtten;
    float _linearAtten;
    float _quadraticAtten;
    float _cutoff;
    float _exponent;
    float _displaySize;
};

} // end namespace Tetraedge

#endif // TETRAEDGE_TE_TE_LIGHT_H