/*
   Copyright (C) 1999-2006 Id Software, Inc. and contributors.
   For a list of contributors, see the accompanying CONTRIBUTORS file.

   This file is part of GtkRadiant.

   GtkRadiant 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.

   GtkRadiant 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 GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#if !defined( INCLUDED_BRUSH_PRIMIT_H )
#define INCLUDED_BRUSH_PRIMIT_H

#include "math/vector.h"
#include "itexdef.h"
#include "debugging/debugging.h"
// Timo
// new brush primitive texdef
struct brushprimit_texdef_t
{
	brushprimit_texdef_t(){
		coords[0][0] = 2.0f;
		coords[0][1] = 0.f;
		coords[0][2] = 0.f;
		coords[1][0] = 0.f;
		coords[1][1] = 2.0f;
		coords[1][2] = 0.f;
	}
	void removeScale( std::size_t width, std::size_t height ){
#if 1
		coords[0][0] *= width;
		coords[0][1] *= width;
		coords[0][2] *= width;
		coords[1][0] *= height;
		coords[1][1] *= height;
		coords[1][2] *= height;
#endif
	}
	void addScale( std::size_t width, std::size_t height ){
#if 1
		ASSERT_MESSAGE( width > 0, "shader-width is 0" );
		ASSERT_MESSAGE( height > 0, "shader-height is 0" );
		coords[0][0] /= width;
		coords[0][1] /= width;
		coords[0][2] /= width;
		coords[1][0] /= height;
		coords[1][1] /= height;
		coords[1][2] /= height;
#endif
	}
	float coords[2][3];
};

class TextureProjection
{
public:
texdef_t m_texdef;
brushprimit_texdef_t m_brushprimit_texdef;
Vector3 m_basis_s;
Vector3 m_basis_t;

TextureProjection(){
}
TextureProjection(
	const texdef_t& texdef,
	const brushprimit_texdef_t& brushprimit_texdef,
	const Vector3& basis_s,
	const Vector3& basis_t
	) :
	m_texdef( texdef ),
	m_brushprimit_texdef( brushprimit_texdef ),
	m_basis_s( basis_s ),
	m_basis_t( basis_t ){
}
};

float Texdef_getDefaultTextureScale();

class texdef_t;
struct Winding;
template<typename Element> class BasicVector3;
typedef BasicVector3<float> Vector3;
template<typename Element> class BasicVector4;
typedef BasicVector4<float> Vector4;
typedef Vector4 Quaternion;
class Matrix4;
class Plane3;

void Normal_GetTransform( const Vector3& normal, Matrix4& transform );

void TexDef_Construct_Default( TextureProjection& projection );

void Texdef_Assign( TextureProjection& projection, const TextureProjection& other );
void Texdef_Shift( TextureProjection& projection, float s, float t );
void Texdef_Scale( TextureProjection& projection, float s, float t );
void Texdef_Rotate( TextureProjection& projection, float angle );
void Texdef_FitTexture( TextureProjection& projection, std::size_t width, std::size_t height, const Vector3& normal, const Winding& w, float s_repeat, float t_repeat );
void Texdef_EmitTextureCoordinates( const TextureProjection& projection, std::size_t width, std::size_t height, Winding& w, const Vector3& normal, const Matrix4& localToWorld );

void ShiftScaleRotate_fromFace( texdef_t& shiftScaleRotate, const TextureProjection& projection );
void ShiftScaleRotate_toFace( const texdef_t& shiftScaleRotate, TextureProjection& projection );

void Texdef_transformLocked( TextureProjection& projection, std::size_t width, std::size_t height, const Plane3& plane, const Matrix4& transform );
void Texdef_normalise( TextureProjection& projection, float width, float height );

enum TexdefTypeId
{
	TEXDEFTYPEID_QUAKE,
	TEXDEFTYPEID_BRUSHPRIMITIVES,
	TEXDEFTYPEID_HALFLIFE,
};

struct bp_globals_t
{
	// tells if we are internally using brush primitive (texture coordinates and map format)
	// this is a shortcut for IntForKey( g_qeglobals.d_project_entity, "brush_primit" )
	// NOTE: must keep the two ones in sync
	TexdefTypeId m_texdefTypeId;
};

extern bp_globals_t g_bp_globals;
extern float g_texdef_default_scale;

void ComputeAxisBase( const Vector3& normal, Vector3& texS, Vector3& texT );

#endif