//========= Copyright Valve Corporation, All rights reserved. ============//

//

// Purpose:

//

// $Workfile: $

// $Date: $

//

//-----------------------------------------------------------------------------

// $Log: $

//

// $NoKeywords: $

//=============================================================================//

#ifndef RADIAL_H

#define RADIAL_H

#pragma once

#include "mathlib/bumpvects.h"

#include "mathlib/ssemath.h"

#include "lightmap.h"

#define RADIALDIST2 2 // (1.25*1.25+1.25*1.25)

#define RADIALDIST 1.42 // 1.77 // sqrt( RADIALDIST2 )

#define WEIGHT_EPS 0.00001f

//-----------------------------------------------------------------------------

// The radial_t data structure is used to accumulate irregularly spaced and irregularly

// shaped direct and indirect lighting samples into a uniformly spaced and shaped luxel grid.

//

// The name "radial" is more historical than discriptive; it stems from the filtering method,

// one of several methods initially tried. Since all the other methods have since been deleted,

// it would probably be more accurate to rename it something like "LuxelAccumulationBucket" or

// something similar, but since "radial" is fairly meaningless it's not like it's actually confusing

// the issue.

//-----------------------------------------------------------------------------

typedef struct radial_s

} radial_t;

void WorldToLuxelSpace( lightinfo_t const *l, Vector const &world, Vector2D &coord );

void LuxelSpaceToWorld( lightinfo_t const *l, float s, float t, Vector &world );

void WorldToLuxelSpace( lightinfo_t const *l, FourVectors const &world, FourVectors &coord );

void LuxelSpaceToWorld( lightinfo_t const *l, fltx4 s, fltx4 t, FourVectors &world );

void AddDirectToRadial( radial_t *rad,

bool hasBumpmap, bool neighborHasBumpmap );

void AddBounceToRadial( radial_t *rad,

bool hasBumpmap, bool neighborHasBumpmap );

bool SampleRadial( radial_t *rad, Vector& pnt, Vector light[NUM_BUMP_VECTS+1], int bumpSampleCount );

radial_t *AllocateRadial( int facenum );

void FreeRadial( radial_t *rad );

bool SampleRadial( radial_t *rad, Vector& pnt, Vector light[NUM_BUMP_VECTS + 1], int bumpSampleCount );

radial_t *BuildPatchRadial( int facenum );

// utilities

bool FloatLess( float const& src1, float const& src2 );

#endif