static void Do_Average_Pigments (COLOUR Colour, PIGMENT *Pigment, VECTOR EPoint, INTERSECTION *Intersect)
{
int i;
COLOUR LC;
BLEND_MAP *Map = Pigment->Blend_Map;
SNGL Value;
SNGL Total = 0.0;
Make_Colour (Colour, 0.0, 0.0, 0.0);
for (i = 0; i < Map->Number_Of_Entries; i++)
{
Value = Map->Blend_Map_Entries[i].value;
Compute_Pigment (LC,Map->Blend_Map_Entries[i].Vals.Pigment,EPoint,Intersect);
Colour[pRED] += LC[pRED] *Value;
Colour[pGREEN] += LC[pGREEN] *Value;
Colour[pBLUE] += LC[pBLUE] *Value;
Colour[pFILTER]+= LC[pFILTER]*Value;
Colour[pTRANSM]+= LC[pTRANSM]*Value;
Total += Value;
}
Colour[pRED] /= Total;
Colour[pGREEN] /= Total;
Colour[pBLUE] /= Total;
Colour[pFILTER]/= Total;
Colour[pTRANSM]/= Total;
}
PIGMENT *Create_Pigment ()
{
PIGMENT *New;
New = (PIGMENT *)POV_MALLOC(sizeof (PIGMENT), "pigment");
Init_TPat_Fields((TPATTERN *)New);
Make_Colour(New->Colour, 0.0,0.0,0.0) ;
New->Blend_Map = NULL;
return (New);
}
INTERIOR *Create_Interior()
{
INTERIOR *New;
New = (INTERIOR *)POV_MALLOC(sizeof(INTERIOR), "interior");
New->References = 1;
New->IOR = 0.0;
New->Old_Refract = 1.0;
New->Dispersion = 1.0;
New->Disp_NElems = DEFAULT_DISP_NELEMS;
New->Caustics = 0.0;
New->Fade_Distance = 0.0;
New->Fade_Power = 0.0;
Make_Colour(New->Fade_Colour, 0.0, 0.0, 0.0);
New->IMedia = NULL;
return(New);
}
int Compute_Pigment (COLOUR Colour, PIGMENT *Pigment, VECTOR EPoint, INTERSECTION *Intersect)
{
int Colour_Found;
VECTOR TPoint;
DBL value;
register DBL fraction;
BLEND_MAP_ENTRY *Cur, *Prev;
COLOUR Temp_Colour;
BLEND_MAP *Blend_Map = Pigment->Blend_Map;
UV_VECT UV_Coords;
if (Pigment->Type <= LAST_SPECIAL_PATTERN)
{
Colour_Found = true;
switch (Pigment->Type)
{
case NO_PATTERN:
Make_Colour(Colour, 0.0, 0.0, 0.0);
break;
case PLAIN_PATTERN:
Assign_Colour(Colour,Pigment->Colour);
break;
case AVERAGE_PATTERN:
Warp_EPoint (TPoint, EPoint, (TPATTERN *)Pigment);
Do_Average_Pigments(Colour,Pigment,TPoint,Intersect);
break;
case UV_MAP_PATTERN:
if(Intersect == NULL)
Error("The 'uv_mapping' pattern cannot be used as part of a pigment function!");
Cur = &(Pigment->Blend_Map->Blend_Map_Entries[0]);
if (Blend_Map->Type == COLOUR_TYPE)
{
Colour_Found = true;
Assign_Colour(Colour, Cur->Vals.Colour);
}
else
{
/* Don't bother warping, simply get the UV vect of the intersection */
UVCoord(UV_Coords, Intersect->Object, Intersect);
TPoint[X] = UV_Coords[U];
TPoint[Y] = UV_Coords[V];
TPoint[Z] = 0;
if (Compute_Pigment(Colour, Cur->Vals.Pigment,TPoint,Intersect))
{
Colour_Found = true;
}
}
break;
case BITMAP_PATTERN:
Warp_EPoint (TPoint, EPoint, (TPATTERN *)Pigment);
Make_Colour(Colour, 0.0, 0.0, 0.0);
Colour_Found = image_map (TPoint, Pigment, Colour);
break;
default:
Error("Pigment type %d not yet implemented",Pigment->Type);
}
return(Colour_Found);
}
Colour_Found = false;
/* NK 19 Nov 1999 added Warp_EPoint */
Warp_EPoint (TPoint, EPoint, (TPATTERN *)Pigment);
value = Evaluate_TPat ((TPATTERN *)Pigment,TPoint,Intersect);
Search_Blend_Map (value, Blend_Map, &Prev, &Cur);
if (Blend_Map->Type == COLOUR_TYPE)
{
Colour_Found = true;
Assign_Colour(Colour, Cur->Vals.Colour);
}
else
{
Warp_EPoint (TPoint, EPoint, (TPATTERN *)Pigment);
if (Compute_Pigment(Colour, Cur->Vals.Pigment,TPoint,Intersect))
{
Colour_Found = true;
}
}
if (Prev != Cur)
{
if (Blend_Map->Type == COLOUR_TYPE)
{
Colour_Found = true;
Assign_Colour(Temp_Colour, Prev->Vals.Colour);
}
else
{
if (Compute_Pigment(Temp_Colour, Prev->Vals.Pigment, TPoint,Intersect))
{
Colour_Found = true;
}
}
fraction = (value - Prev->value) / (Cur->value - Prev->value);
Colour[pRED] = Temp_Colour[pRED] + fraction * (Colour[pRED] - Temp_Colour[pRED]);
Colour[pGREEN] = Temp_Colour[pGREEN] + fraction * (Colour[pGREEN] - Temp_Colour[pGREEN]);
Colour[pBLUE] = Temp_Colour[pBLUE] + fraction * (Colour[pBLUE] - Temp_Colour[pBLUE]);
Colour[pFILTER] = Temp_Colour[pFILTER] + fraction * (Colour[pFILTER] - Temp_Colour[pFILTER]);
Colour[pTRANSM] = Temp_Colour[pTRANSM] + fraction * (Colour[pTRANSM] - Temp_Colour[pTRANSM]);
}
return(Colour_Found);
}
int Post_Pigment(PIGMENT *Pigment)
{
int i, Has_Filter;
BLEND_MAP *Map;
if (Pigment == NULL)
{
Error("Missing pigment");
}
if (Pigment->Flags & POST_DONE)
{
return(Pigment->Flags & HAS_FILTER);
}
if (Pigment->Type == NO_PATTERN)
{
Pigment->Type = PLAIN_PATTERN;
Make_Colour(Pigment->Colour, 0.0, 0.0, 0.0) ;
Warning(150, "No pigment type given.");
}
Pigment->Flags |= POST_DONE;
switch (Pigment->Type)
{
case PLAIN_PATTERN:
Destroy_Warps (Pigment->Warps);
Pigment->Warps = NULL;
break;
case NO_PATTERN:
case BITMAP_PATTERN:
break;
default:
if (Pigment->Blend_Map == NULL)
{
switch (Pigment->Type)
{
case BOZO_PATTERN: Pigment->Blend_Map = &Bozo_Default_Map; break;
case BRICK_PATTERN: Pigment->Blend_Map = &Brick_Default_Map; break;
case WOOD_PATTERN: Pigment->Blend_Map = &Wood_Default_Map; break;
case MANDEL_PATTERN: Pigment->Blend_Map = &Mandel_Default_Map;break;
case RADIAL_PATTERN: Pigment->Blend_Map = &Radial_Default_Map;break;
case AGATE_PATTERN: Pigment->Blend_Map = &Agate_Default_Map; break;
case MARBLE_PATTERN: Pigment->Blend_Map = &Marble_Default_Map;break;
case HEXAGON_PATTERN: Pigment->Blend_Map = &Hex_Default_Map; break;
case CHECKER_PATTERN: Pigment->Blend_Map = &Check_Default_Map; break;
case AVERAGE_PATTERN: Error("Missing pigment_map in average pigment"); break;
case OBJECT_PATTERN: Pigment->Blend_Map = &Check_Default_Map; break;
default: Pigment->Blend_Map = &Gray_Default_Map; break;
}
}
break;
}
/* Now we test wether this pigment is opaque or not. [DB 8/94] */
Has_Filter = false;
if ((fabs(Pigment->Colour[pFILTER]) > EPSILON) ||
(fabs(Pigment->Colour[pTRANSM]) > EPSILON))
{
Has_Filter = true;
}
if ((Map = Pigment->Blend_Map) != NULL)
{
if ((Map->Type == PIGMENT_TYPE) || (Map->Type == DENSITY_TYPE))
{
for (i = 0; i < Map->Number_Of_Entries; i++)
{
Has_Filter |= Post_Pigment(Map->Blend_Map_Entries[i].Vals.Pigment);
}
}
else
{
for (i = 0; i < Map->Number_Of_Entries; i++)
{
Has_Filter |= fabs(Map->Blend_Map_Entries[i].Vals.Colour[pFILTER])>EPSILON;
Has_Filter |= fabs(Map->Blend_Map_Entries[i].Vals.Colour[pTRANSM])>EPSILON;
}
}
}
if (Has_Filter)
{
Pigment->Flags |= HAS_FILTER;
}
if (Pigment->Next != NULL)
{
Post_Pigment((PIGMENT *)Pigment->Next);
}
return(Has_Filter);
}
static void do_skysphere(RAY *Ray, COLOUR Colour)
{
int i;
DBL att, trans;
COLOUR Col, Col_Temp, Filter;
VECTOR P;
SKYSPHERE *Skysphere;
/* Why are we here. */
if (Frame.Skysphere == NULL)
{
return;
}
Make_Colour(Col, 0.0, 0.0, 0.0);
if (((Skysphere = Frame.Skysphere) != NULL) && (Skysphere->Pigments != NULL))
{
Make_ColourA(Filter, 1.0, 1.0, 1.0, 1.0, 1.0);
trans = 1.0;
/* Transform point on unit sphere. */
if (Skysphere->Trans != NULL)
{
MInvTransPoint(P, Ray->Direction, Skysphere->Trans);
}
else
{
Assign_Vector(P, Ray->Direction);
}
for (i = Skysphere->Count-1; i >= 0; i--)
{
/* Compute sky colour from colour map. */
/* NK 1998 - added NULL as final parameter */
Compute_Pigment(Col_Temp, Skysphere->Pigments[i], P, NULL);
/* NK ---- */
att = trans * (1.0 - Col_Temp[pFILTER] - Col_Temp[pTRANSM]);
CRGBAddScaledEq(Col, att, Col_Temp);
Filter[pRED] *= Col_Temp[pRED];
Filter[pGREEN] *= Col_Temp[pGREEN];
Filter[pBLUE] *= Col_Temp[pBLUE];
Filter[pFILTER] *= Col_Temp[pFILTER];
Filter[pTRANSM] *= Col_Temp[pTRANSM];
trans = fabs(Filter[pFILTER]) + fabs(Filter[pTRANSM]);
}
Colour[pRED] = Col[pRED] + Colour[pRED] * (Filter[pRED] * Filter[pFILTER] + Filter[pTRANSM]);
Colour[pGREEN] = Col[pGREEN] + Colour[pGREEN] * (Filter[pGREEN] * Filter[pFILTER] + Filter[pTRANSM]);
Colour[pBLUE] = Col[pBLUE] + Colour[pBLUE] * (Filter[pBLUE] * Filter[pFILTER] + Filter[pTRANSM]);
Colour[pFILTER] = Colour[pFILTER] * Filter[pFILTER];
Colour[pTRANSM] = Colour[pTRANSM] * Filter[pTRANSM];
}
}