vmap/radiant/brush_primit.h

/*
   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