bool image_map(const Vector3d& EPoint, const PIGMENT *Pigment, TransColour& colour)
{
// TODO ALPHA - the caller does expect non-premultiplied data, but maybe he could profit from premultiplied data?
int reg_number;
DBL xcoor = 0.0, ycoor = 0.0;
// If outside map coverage area, return clear
if(map_pos(EPoint, Pigment->pattern.get(), &xcoor, &ycoor))
{
colour = ToTransColour(RGBFTColour(1.0, 1.0, 1.0, 0.0, 1.0));
return false;
}
else
{
RGBFTColour rgbft;
if (const ImagePatternImpl *pattern = dynamic_cast<ImagePatternImpl*>(Pigment->pattern.get()))
image_colour_at(pattern->pImage, xcoor, ycoor, rgbft, ®_number, false);
else
POV_PATTERN_ASSERT(false);
colour = ToTransColour(rgbft);
return true;
}
}
SceneData::SceneData() :
fog(nullptr),
rainbow(nullptr),
skysphere(nullptr),
functionContextFactory()
{
atmosphereIOR = 1.0;
atmosphereDispersion = 0.0;
backgroundColour = ToTransColour(RGBFTColour(0.0, 0.0, 0.0, 0.0, 1.0));
ambientLight = MathColour(1.0);
iridWavelengths = MathColour::DefaultWavelengths();
languageVersion = POV_RAY_VERSION_INT;
languageVersionSet = false;
languageVersionLate = false;
warningLevel = 10; // all warnings
legacyCharset = LegacyCharset::kUnspecified;
noiseGenerator = kNoiseGen_RangeCorrected;
explicitNoiseGenerator = false; // scene has not set the noise generator explicitly
boundingMethod = 0;
numberOfWaves = 10;
parsedMaxTraceLevel = MAX_TRACE_LEVEL_DEFAULT;
parsedAdcBailout = 1.0 / 255.0; // adc bailout sufficient for displays
workingGamma.reset();
workingGammaToSRGB.reset();
inputFileGamma = SRGBGammaCurve::Get();
gammaMode = kPOVList_GammaMode_None; // default setting for v3.6.2, which in turn is the default for the language
mmPerUnit = 10;
useSubsurface = false;
subsurfaceSamplesDiffuse = 50;
subsurfaceSamplesSingle = 50;
subsurfaceUseRadiosity = false;
bspMaxDepth = 0;
bspObjectIsectCost = bspBaseAccessCost = bspChildAccessCost = bspMissChance = 0.0f;
Fractal_Iteration_Stack_Length = 0;
Max_Blob_Components = 1000; // TODO FIXME - this gets set in the parser but allocated *before* that in the scene data, and if it is 0 here, a malloc may fail there because the memory requested is zero [trf]
Max_Bounding_Cylinders = 100; // TODO FIXME - see note for Max_Blob_Components
boundingSlabs = nullptr;
splitUnions = false;
removeBounds = true;
tree = nullptr;
}
SceneData::SceneData() :
fog(NULL),
rainbow(NULL),
skysphere(NULL),
functionContextFactory(new FunctionVM())
{
atmosphereIOR = 1.0;
atmosphereDispersion = 0.0;
backgroundColour = ToTransColour(RGBFTColour(0.0, 0.0, 0.0, 0.0, 1.0));
ambientLight = MathColour(1.0);
iridWavelengths = MathColour::DefaultWavelengths();
languageVersion = OFFICIAL_VERSION_NUMBER;
languageVersionSet = false;
languageVersionLate = false;
warningLevel = 10; // all warnings
stringEncoding = kStringEncoding_ASCII;
noiseGenerator = kNoiseGen_RangeCorrected;
explicitNoiseGenerator = false; // scene has not set the noise generator explicitly
numberOfWaves = 10;
parsedMaxTraceLevel = MAX_TRACE_LEVEL_DEFAULT;
parsedAdcBailout = 1.0 / 255.0; // adc bailout sufficient for displays
workingGamma.reset();
workingGammaToSRGB.reset();
inputFileGammaSet = false; // TODO remove for 3.7x
inputFileGamma = SRGBGammaCurve::Get();
mmPerUnit = 10;
useSubsurface = false;
subsurfaceSamplesDiffuse = 50;
subsurfaceSamplesSingle = 50;
subsurfaceUseRadiosity = false;
bspMaxDepth = 0;
bspObjectIsectCost = bspBaseAccessCost = bspChildAccessCost = bspMissChance = 0.0f;
Fractal_Iteration_Stack_Length = 0;
Max_Blob_Components = 1000; // TODO FIXME - this gets set in the parser but allocated *before* that in the scene data, and if it is 0 here, a malloc may fail there because the memory requested is zero [trf]
Max_Bounding_Cylinders = 100; // TODO FIXME - see note for Max_Blob_Components
boundingSlabs = NULL;
splitUnions = false;
removeBounds = true;
tree = NULL;
}
static void InterpolateBicubic(const ImageData *image, DBL xcoor, DBL ycoor, RGBFTColour& colour, int *index, bool premul)
{
int iycoor, ixcoor;
int cornerIndex;
RGBFTColour cornerColour;
DBL factor;
DBL factorsX[4];
DBL factorsY[4];
xcoor += 0.5;
ycoor += 0.5;
iycoor = (int)ycoor;
ixcoor = (int)xcoor;
cubic(factorsX, xcoor);
cubic(factorsY, ycoor);
// We're using double precision for the colors here to avoid higher-than-1.0 results due to rounding errors,
// which would otherwise lead to stray dot artifacts when clamped to [0..1] range for a color_map or similar.
// (Note that strictly speaking we don't avoid such rounding errors, but rather make them small enough that
// subsequent rounding to single precision will take care of them.)
// (Note that bicubic interpolation may still give values outside the range [0..1] at high-contrast edges;
// this is an inherent property of this interpolation method, and is therefore accepted here.)
PreciseRGBFTColour tempColour;
DBL tempIndex = 0;
for (int i = 0; i < 4; i ++)
{
for (int j = 0; j < 4; j ++)
{
cornerColour.Clear();
no_interpolation(image, (DBL)ixcoor + i-2, (DBL)iycoor + j-2, cornerColour, &cornerIndex, premul);
factor = factorsX[i] * factorsY[j];
tempColour += PreciseRGBFTColour(cornerColour) * factor;
tempIndex += cornerIndex * factor;
}
}
colour = RGBFTColour(tempColour);
*index = (int)tempIndex;
}
static void Interp(const ImageData *image, DBL xcoor, DBL ycoor, RGBFTColour& colour, int *index, bool premul)
{
int iycoor, ixcoor, i;
int Corners_Index[4];
RGBFTColour Corner_Colour[4];
DBL Corner_Factors[4];
xcoor += 0.5;
ycoor += 0.5;
iycoor = (int)ycoor;
ixcoor = (int)xcoor;
no_interpolation(image, (DBL)ixcoor, (DBL)iycoor, Corner_Colour[0], &Corners_Index[0], premul);
no_interpolation(image, (DBL)ixcoor - 1, (DBL)iycoor, Corner_Colour[1], &Corners_Index[1], premul);
no_interpolation(image, (DBL)ixcoor, (DBL)iycoor - 1, Corner_Colour[2], &Corners_Index[2], premul);
no_interpolation(image, (DBL)ixcoor - 1, (DBL)iycoor - 1, Corner_Colour[3], &Corners_Index[3], premul);
if(image->Interpolation_Type == BILINEAR)
bilinear(Corner_Factors, xcoor, ycoor);
else if(image->Interpolation_Type == NORMALIZED_DIST)
norm_dist(Corner_Factors, xcoor, ycoor);
else
POV_ASSERT(false);
// We're using double precision for the colors here to avoid higher-than-1.0 results due to rounding errors,
// which would otherwise lead to stray dot artifacts when clamped to [0..1] range for a color_map or similar.
// (Note that strictly speaking we don't avoid such rounding errors, but rather make them small enough that
// subsequent rounding to single precision will take care of them.)
PreciseRGBFTColour temp_colour;
DBL temp_index = 0;
for (i = 0; i < 4; i ++)
{
temp_colour += PreciseRGBFTColour(Corner_Colour[i]) * Corner_Factors[i];
temp_index += Corners_Index[i] * Corner_Factors[i];
}
colour = RGBFTColour(temp_colour);
*index = (int)temp_index;
}
