/*  Copyright (C) 1996-1997  Id Software, Inc.
 
 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 
 See file, 'COPYING', for details.
 */

#ifndef __LIGHT_LTFACE2_H__
#define __LIGHT_LTFACE2_H__

#include <common/cmdlib.hh>
#include <common/mathlib.hh>
#include <common/bspfile.hh>
#include <common/bsputils.hh>
#include <common/log.hh>
#include <common/threads.hh>
#include <common/polylib.hh>

#include <light/light2.hh>

glm::vec2 WorldToTexCoord_HighPrecision(const bsp2_t *bsp, const bsp2_dface_t *face, const glm::vec3 &world);

class faceextents_t {
private:
    glm::ivec2 m_texmins;
    glm::ivec2 m_texsize;
    float m_lightmapscale;
    glm::mat4x4 m_worldToTexCoord;
    glm::mat4x4 m_texCoordToWorld;
    
public:
    faceextents_t() = default;
    faceextents_t(const bsp2_dface_t *face, const bsp2_t *bsp, float lmscale);
    int width() const;
    int height() const;
    int numsamples() const;
    glm::ivec2 texsize() const;
    int indexOf(const glm::ivec2 &lm) const;
    glm::ivec2 intCoordsFromIndex(int index) const;
    glm::vec2 LMCoordToTexCoord(const glm::vec2 &LMCoord) const;
    glm::vec2 TexCoordToLMCoord(const glm::vec2 &tc) const;
    glm::vec2 worldToTexCoord(glm::vec3 world) const;
    glm::vec3 texCoordToWorld(glm::vec2 tc) const;
    glm::vec2 worldToLMCoord(glm::vec3 world) const;
    glm::vec3 LMCoordToWorld(glm::vec2 lm) const;
};

#endif /* __LIGHT_LTFACE2_H__ */