702 lines
26 KiB
C++
702 lines
26 KiB
C++
#include "iwa_fractalnoisefx.h"
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#include "iwa_noise1234.h"
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#include "tparamuiconcept.h"
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#include <QVector3D>
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namespace {
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// convert sRGB color space to power space
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template <typename T = double>
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inline T to_linear_color_space(T nonlinear_color, T exposure, T gamma) {
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// return -std::log(T(1) - std::pow(nonlinear_color, gamma)) / exposure;
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if (nonlinear_color <= T(0)) return T(0);
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return std::pow(nonlinear_color, gamma) / exposure;
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}
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// convert power space to sRGB color space
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template <typename T = double>
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inline T to_nonlinear_color_space(T linear_color, T exposure, T gamma) {
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// return std::pow(T(1) - std::exp(-exposure * linear_color), T(1) / gamma);
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if (linear_color <= T(0)) return T(0);
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return std::pow(exposure * linear_color, T(1) / gamma);
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}
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inline double hardlight(const double *dn, const double *up) {
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if ((*up) < 0.5)
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return (*up) * (*dn) * 2.0;
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else
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return 1.0 - 2.0 * (1.0 - (*up)) * (1.0 - (*dn));
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}
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template <class T = double>
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inline const T &clamp(const T &v, const T &lo, const T &hi) {
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assert(!(hi < lo));
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return (v < lo) ? lo : (hi < v) ? hi : v;
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}
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const double turbulentGamma = 2.2;
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// magic number to offset evolution between generations
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const double evolutionOffsetStep = 19.82;
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const double evolutionOffsetStepW = 31.1;
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} // namespace
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//------------------------------------------------------------------
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Iwa_FractalNoiseFx::Iwa_FractalNoiseFx()
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: m_fractalType(new TIntEnumParam(Basic, "Basic"))
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, m_noiseType(new TIntEnumParam(Block, "Block"))
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, m_invert(false)
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, m_rotation(0.0)
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, m_uniformScaling(true)
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, m_scale(100.0)
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, m_scaleW(100.0)
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, m_scaleH(100.0)
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, m_offsetTurbulence(TPointD(0.0, 0.0))
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, m_perspectiveOffset(false)
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, m_complexity(6.0)
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, m_subInfluence(70.0)
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, m_subScaling(56.0)
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, m_subRotation(0.0)
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, m_subOffset(TPointD(0.0, 0.0))
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///, m_centerSubscale(false)
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, m_evolution(0.0)
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, m_cycleEvolution(false)
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, m_cycleEvolutionRange(1.0)
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///, m_randomSeed(0)
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, m_dynamicIntensity(1.0)
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, m_alphaRendering(false)
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, m_doConical(false)
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, m_conicalEvolution(0.0)
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, m_conicalAngle(60.0)
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, m_cameraFov(60.0)
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, m_zScale(2.0) {
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m_fractalType->addItem(TurbulentSmooth, "Turbulent Smooth");
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m_fractalType->addItem(TurbulentBasic, "Turbulent Basic");
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m_fractalType->addItem(TurbulentSharp, "Turbulent Sharp");
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m_fractalType->addItem(Dynamic, "Dynamic");
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m_fractalType->addItem(DynamicTwist, "Dynamic Twist");
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m_fractalType->addItem(Max, "Max");
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m_fractalType->addItem(Rocky, "Rocky");
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m_noiseType->addItem(Smooth, "Smooth");
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m_noiseType->setValue(Smooth);
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m_rotation->setMeasureName("angle");
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m_rotation->setValueRange(-360.0, 360.0);
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m_scale->setMeasureName("fxLength");
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m_scale->setValueRange(20.0, 600.0);
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m_scaleW->setMeasureName("fxLength");
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m_scaleW->setValueRange(20.0, 600.0);
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m_scaleH->setMeasureName("fxLength");
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m_scaleH->setValueRange(20.0, 600.0);
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m_offsetTurbulence->getX()->setMeasureName("fxLength");
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m_offsetTurbulence->getY()->setMeasureName("fxLength");
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m_complexity->setValueRange(1.0, 10.0);
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m_subInfluence->setValueRange(25.0, 100.0);
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m_subScaling->setValueRange(25.0, 100.0);
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m_subRotation->setMeasureName("angle");
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m_subRotation->setValueRange(-360.0, 360.0);
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m_subOffset->getX()->setMeasureName("fxLength");
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m_subOffset->getY()->setMeasureName("fxLength");
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m_evolution->setValueRange(-100.0, 100.0);
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m_cycleEvolutionRange->setValueRange(0.1, 30.0);
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m_dynamicIntensity->setValueRange(-10.0, 10.0);
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m_conicalEvolution->setValueRange(-100, 100.0);
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m_conicalAngle->setValueRange(0.0, 89.9);
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m_cameraFov->setValueRange(10.0, 170.0);
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m_zScale->setValueRange(0.0, 3.0);
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bindParam(this, "fractalType", m_fractalType);
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bindParam(this, "noiseType", m_noiseType);
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bindParam(this, "invert", m_invert);
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bindParam(this, "rotation", m_rotation);
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bindParam(this, "uniformScaling", m_uniformScaling);
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bindParam(this, "scale", m_scale);
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bindParam(this, "scaleW", m_scaleW);
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bindParam(this, "scaleH", m_scaleH);
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bindParam(this, "offsetTurbulence", m_offsetTurbulence);
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bindParam(this, "perspectiveOffset", m_perspectiveOffset);
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bindParam(this, "complexity", m_complexity);
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bindParam(this, "subInfluence", m_subInfluence);
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bindParam(this, "subScaling", m_subScaling);
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bindParam(this, "subRotation", m_subRotation);
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bindParam(this, "subOffset", m_subOffset);
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/// bindParam(this, "centerSubscale", m_centerSubscale);
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bindParam(this, "evolution", m_evolution);
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bindParam(this, "cycleEvolution", m_cycleEvolution);
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bindParam(this, "cycleEvolutionRange", m_cycleEvolutionRange);
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/// bindParam(this, "randomSeed", m_randomSeed);
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bindParam(this, "dynamicIntensity", m_dynamicIntensity);
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bindParam(this, "doConical", m_doConical);
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bindParam(this, "conicalEvolution", m_conicalEvolution);
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bindParam(this, "conicalAngle", m_conicalAngle);
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bindParam(this, "cameraFov", m_cameraFov);
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bindParam(this, "zScale", m_zScale);
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bindParam(this, "alphaRendering", m_alphaRendering);
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enableComputeInFloat(true);
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}
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//------------------------------------------------------------------
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bool Iwa_FractalNoiseFx::doGetBBox(double frame, TRectD &bBox,
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const TRenderSettings &ri) {
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bBox = TConsts::infiniteRectD;
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return true;
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}
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//------------------------------------------------------------------
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void Iwa_FractalNoiseFx::doCompute(TTile &tile, double frame,
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const TRenderSettings &ri) {
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// obtain current parameters
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FNParam param;
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obtainParams(param, frame, ri.m_affine);
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Noise1234 pn;
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TDimension outDim = tile.getRaster()->getSize();
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// allocate buffer for accumulating the noise patterns
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TRasterGR8P out_buf_ras = TRasterGR8P(outDim.lx * sizeof(double), outDim.ly);
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out_buf_ras->clear();
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out_buf_ras->lock();
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double *out_buf = (double *)out_buf_ras->getRawData();
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// allocate buffer for storing the noise pattern of each generation
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TRasterGR8P work_buf_ras = TRasterGR8P(outDim.lx * sizeof(double), outDim.ly);
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work_buf_ras->lock();
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double *work_buf = (double *)work_buf_ras->getRawData();
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// affine transformations
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TAffine globalAff = TTranslation(-tile.m_pos) * ri.m_affine;
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TAffine parentAff =
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TScale(param.scale.lx, param.scale.ly) * TRotation(-param.rotation);
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TAffine subAff = TTranslation(param.subOffset) * TScale(param.subScaling) *
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TRotation(-param.subRotation);
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TAffine genAff;
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// for cyclic evolution, rotate the sample position in ZW space instead of
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// using the periodic noise in Z space so that it can cycle in arbitral
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// period.
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double evolution_z = param.evolution;
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TPointD evolution_zw;
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if (param.cycleEvolution) {
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double theta = 2.0 * M_PI * param.evolution / param.cycleEvolutionRange;
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double d = param.cycleEvolutionRange / (2.0 * M_PI);
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evolution_zw.x = d * cos(theta);
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evolution_zw.y = d * sin(theta);
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}
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int genCount = (int)std::ceil(param.complexity);
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if (!param.doConical) {
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TAffine parentOffsetAff = TTranslation(param.offsetTurbulence);
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// accumulate base noise pattern for each generation
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for (int gen = 0; gen < genCount; gen++) {
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// affine transformation for the current generation
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TAffine currentAff =
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(globalAff * parentOffsetAff * parentAff * genAff).inv();
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// scale of the current pattern ( used for the Dynamic / Dynamic Twist
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// offset )
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double scale = sqrt(std::abs(currentAff.det()));
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// for each pixel
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double *buf_p = work_buf;
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for (int y = 0; y < outDim.ly; y++) {
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for (int x = 0; x < outDim.lx; x++, buf_p++) {
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// obtain sampling position
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// For Dynamic and Dynamic Twist patterns, the position offsets using
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// gradient / rotation of the parent pattern
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TPointD samplePos =
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getSamplePos(x, y, outDim, out_buf, gen, scale, param);
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// multiply affine transformation
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samplePos = currentAff * samplePos;
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// adjust position for the block pattern
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if (param.noiseType == Block)
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samplePos = TPointD(std::floor(samplePos.x) + 0.5,
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std::floor(samplePos.y) + 0.5);
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// calculate the base noise
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if (param.cycleEvolution)
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*buf_p = (pn.noise(samplePos.x, samplePos.y, evolution_zw.x,
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evolution_zw.y) +
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1.0) *
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0.5;
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else
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*buf_p =
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(pn.noise(samplePos.x, samplePos.y, evolution_z) + 1.0) * 0.5;
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// convert the noise
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convert(buf_p, param);
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}
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}
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// just copy the values for the first generation
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if (gen == 0) {
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memcpy(out_buf, work_buf, outDim.lx * outDim.ly * sizeof(double));
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} else {
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// intensity of the last generation will take the fraction part of
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// complexity
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double genIntensity = std::min(1.0, param.complexity - (double)gen);
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// influence of the current generation
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double influence =
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genIntensity * std::pow(param.subInfluence, (double)gen);
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// composite the base noise pattern
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buf_p = work_buf;
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double *out_p = out_buf;
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for (int i = 0; i < outDim.lx * outDim.ly; i++, buf_p++, out_p++)
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composite(out_p, buf_p, influence, param);
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}
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// update affine transformations (for the next generation loop)
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genAff *= subAff;
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// When the "Perspective Offset" option is ON, reduce the offset amount
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// according to the sub scale
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if (param.perspectiveOffset)
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parentOffsetAff = TScale(param.subScaling) *
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TRotation(-param.subRotation) * parentOffsetAff *
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TRotation(param.subRotation) *
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TScale(1 / param.subScaling);
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if (param.cycleEvolution)
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evolution_zw.x += evolutionOffsetStep;
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else
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evolution_z += evolutionOffsetStep;
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}
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}
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// conical noise
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else {
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// angle of slope of the cone
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double theta_n = param.conicalAngle * M_PI_180;
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// half of the vertical fov
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double phi_2 = param.cameraFov * 0.5 * M_PI_180;
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double z_scale = std::pow(10.0, param.zScale);
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double evolution_w = param.conicalEvolution;
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// pixel distance between camera and the screen
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double D = ri.m_cameraBox.getLy() * 0.5 / std::tan(phi_2);
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// the line on the slope : d = U * z + V
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double U = -1.0 / std::tan(theta_n);
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double V = ri.m_cameraBox.getLy() * 0.5;
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TPointD center = ri.m_affine * param.offsetTurbulence;
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// accumulate base noise pattern for each generation
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for (int gen = 0; gen < genCount; gen++) {
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// affine transformation for the current generation
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TAffine currentAff = (globalAff * parentAff * genAff).inv();
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// scale of the current pattern ( used for the Dynamic / Dynamic Twist
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// offset )
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double scale = sqrt(std::abs(currentAff.det()));
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// for each pixel
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double *buf_p = work_buf;
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for (int y = 0; y < outDim.ly; y++) {
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for (int x = 0; x < outDim.lx; x++, buf_p++) {
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double dx, dy, dz;
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if (theta_n == 0.0) {
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dx = x;
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dy = y;
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dz = 0.0;
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} else {
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// conical, without offset
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if (center == TPointD()) {
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TPointD p = TTranslation(tile.m_pos) * TPointD(x, y);
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// pixel distance from the screen center
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double d = tdistance(p, TPointD());
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// line of sight : d = S * z + T
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double S = d / D;
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double T = d;
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dz = (V - T) / (S - U);
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double dp = S * dz + T;
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if (d != 0.0) {
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p.x *= dp / d;
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p.y *= dp / d;
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}
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p += center * (dp / V);
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p = TTranslation(tile.m_pos).inv() * p;
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dx = p.x;
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dy = p.y;
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dz /= z_scale;
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}
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// conical, with offset
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else {
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// compute the intersecting point between the "noise cone" and the
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// line of sight
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TPointD _p = TTranslation(tile.m_pos) * TPointD(x, y);
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// offset by combination of offsets of A) projection position and
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// B) eye position.
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//
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// A) 0.5 * projection position offset
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QVector3D p(_p.x - center.x * 0.5, _p.y - center.y * 0.5, 0.0);
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QVector3D cone_C(0.0, 0.0, V * std::tan(theta_n));
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QVector3D cone_a(0, 0, -1);
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// B) 0.5 * eye position offset
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double offsetAdj = 0.5 * (D + cone_C.z()) / cone_C.z();
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QVector3D eye_O(center.x * offsetAdj, center.y * offsetAdj, -D);
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QVector3D eye_d = (p - eye_O).normalized();
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double cos_ConeT = std::sin(theta_n);
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float d_a = QVector3D::dotProduct(eye_d, cone_a);
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float Ca_Oa = QVector3D::dotProduct(cone_C, cone_a) -
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QVector3D::dotProduct(eye_O, cone_a);
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// A * t^2 + B * t + C = 0
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float A =
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d_a * d_a - eye_d.lengthSquared() * cos_ConeT * cos_ConeT;
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float B = 2.0 *
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(QVector3D::dotProduct(eye_d, cone_C) -
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QVector3D::dotProduct(eye_d, eye_O)) *
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cos_ConeT * cos_ConeT -
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2.0 * Ca_Oa * d_a;
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float C = Ca_Oa * Ca_Oa -
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cos_ConeT * cos_ConeT *
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(cone_C.lengthSquared() -
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2.0 * QVector3D::dotProduct(eye_O, cone_C) +
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eye_O.lengthSquared());
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// obtain t
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double t1 = (-B + std::sqrt(B * B - 4.0 * A * C)) / (2.0 * A);
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double t2 = (-B - std::sqrt(B * B - 4.0 * A * C)) / (2.0 * A);
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if (t1 < 0)
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t1 = t2;
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else if (t2 < 0)
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t2 = t1;
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double t = std::min(t1, t2);
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// intersecting point
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QVector3D sampleP = eye_O + eye_d * t;
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_p.x = sampleP.x();
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_p.y = sampleP.y();
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_p = TTranslation(tile.m_pos).inv() * _p;
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dx = _p.x;
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dy = _p.y;
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dz = sampleP.z() / z_scale;
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}
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if (param.cycleEvolution) {
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double cycle_theta =
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2.0 * M_PI * (param.evolution + param.conicalEvolution + dz) /
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param.cycleEvolutionRange;
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double cycle_d = param.cycleEvolutionRange / (2.0 * M_PI);
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evolution_zw.x = cycle_d * cos(cycle_theta);
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evolution_zw.y = cycle_d * sin(cycle_theta);
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}
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}
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// obtain sampling position
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// For Dynamic and Dynamic Twist patterns, the position offsets using
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// gradient / rotation of the parent pattern
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TPointD samplePosOffset =
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getSamplePos(x, y, outDim, out_buf, gen, scale, param) -
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TPointD(x, y);
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TPointD samplePos =
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TPointD(dx, dy) + samplePosOffset * (D / (D + dz));
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// multiply affine transformation
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samplePos = currentAff * samplePos;
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// adjust position for the block pattern
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if (param.noiseType == Block)
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samplePos = TPointD(std::floor(samplePos.x) + 0.5,
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std::floor(samplePos.y) + 0.5);
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// calculate the base noise
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if (param.cycleEvolution)
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*buf_p = (pn.noise(samplePos.x, samplePos.y, evolution_zw.x,
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evolution_zw.y) +
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1.0) *
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0.5;
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else
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*buf_p = (pn.noise(samplePos.x, samplePos.y, evolution_z,
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evolution_w + dz) +
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1.0) *
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0.5;
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// convert the noise
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convert(buf_p, param);
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}
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}
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// just copy the values for the first generation
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if (gen == 0) {
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memcpy(out_buf, work_buf, outDim.lx * outDim.ly * sizeof(double));
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} else {
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// intensity of the last generation will take the fraction part of
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// complexity
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double genIntensity = std::min(1.0, param.complexity - (double)gen);
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// influence of the current generation
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double influence =
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genIntensity * std::pow(param.subInfluence, (double)gen);
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// composite the base noise pattern
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buf_p = work_buf;
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double *out_p = out_buf;
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for (int i = 0; i < outDim.lx * outDim.ly; i++, buf_p++, out_p++)
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composite(out_p, buf_p, influence, param);
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}
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// update affine transformations (for the next generation loop)
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genAff *= subAff;
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if (param.cycleEvolution)
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evolution_zw.x += evolutionOffsetStep;
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else {
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evolution_z += evolutionOffsetStep;
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evolution_w += evolutionOffsetStepW;
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}
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}
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}
|
|
|
|
work_buf_ras->unlock();
|
|
|
|
// finalize pattern (converting the color space)
|
|
if (param.fractalType == TurbulentSmooth ||
|
|
param.fractalType == TurbulentBasic ||
|
|
param.fractalType == TurbulentSharp) {
|
|
double *out_p = out_buf;
|
|
for (int i = 0; i < outDim.lx * outDim.ly; i++, out_p++)
|
|
finalize(out_p, param);
|
|
}
|
|
|
|
tile.getRaster()->clear();
|
|
|
|
// convert to RGB channel values
|
|
TRaster32P ras32 = (TRaster32P)tile.getRaster();
|
|
TRaster64P ras64 = (TRaster64P)tile.getRaster();
|
|
TRasterFP rasF = (TRasterFP)tile.getRaster();
|
|
if (ras32)
|
|
outputRaster<TRaster32P, TPixel32>(ras32, out_buf, param);
|
|
else if (ras64)
|
|
outputRaster<TRaster64P, TPixel64>(ras64, out_buf, param);
|
|
else if (rasF)
|
|
outputRaster<TRasterFP, TPixelF>(rasF, out_buf, param);
|
|
|
|
out_buf_ras->unlock();
|
|
}
|
|
|
|
//------------------------------------------------------------------
|
|
// obtain current parameters
|
|
void Iwa_FractalNoiseFx::obtainParams(FNParam ¶m, const double frame,
|
|
const TAffine &aff) {
|
|
param.fractalType = (FractalType)m_fractalType->getValue();
|
|
param.noiseType = (NoiseType)m_noiseType->getValue();
|
|
param.invert = m_invert->getValue();
|
|
param.rotation = m_rotation->getValue(frame); // in degree, not radian
|
|
if (m_uniformScaling->getValue()) { // uniform case
|
|
double s = m_scale->getValue(frame);
|
|
param.scale = TDimensionD(s, s);
|
|
} else { // non-uniform case
|
|
param.scale.lx = m_scaleW->getValue(frame);
|
|
param.scale.ly = m_scaleH->getValue(frame);
|
|
}
|
|
assert(param.scale.lx != 0.0 && param.scale.ly != 0.0);
|
|
if (param.scale.lx == 0.0) param.scale.lx = 1e-8;
|
|
if (param.scale.ly == 0.0) param.scale.ly = 1e-8;
|
|
|
|
param.offsetTurbulence = m_offsetTurbulence->getValue(frame);
|
|
param.perspectiveOffset = m_perspectiveOffset->getValue();
|
|
param.complexity = m_complexity->getValue(frame);
|
|
if (param.complexity < 1.0)
|
|
param.complexity =
|
|
1.0; // at least the first generation is rendered in full opacity
|
|
param.subInfluence =
|
|
m_subInfluence->getValue(frame) / 100.0; // normalize to 0 - 1
|
|
param.subScaling =
|
|
m_subScaling->getValue(frame) / 100.0; // normalize to 0 - 1
|
|
param.subRotation = m_subRotation->getValue(frame); // in degree, not radian
|
|
param.subOffset = m_subOffset->getValue(frame);
|
|
param.evolution = m_evolution->getValue(frame);
|
|
param.cycleEvolution = m_cycleEvolution->getValue();
|
|
param.cycleEvolutionRange = m_cycleEvolutionRange->getValue(frame);
|
|
param.dynamicIntensity = m_dynamicIntensity->getValue(frame) * 10.0;
|
|
|
|
param.doConical = m_doConical->getValue();
|
|
param.conicalEvolution = m_conicalEvolution->getValue(frame);
|
|
param.conicalAngle = m_conicalAngle->getValue(frame);
|
|
param.cameraFov = m_cameraFov->getValue(frame);
|
|
param.zScale = m_zScale->getValue(frame);
|
|
|
|
param.alphaRendering = m_alphaRendering->getValue();
|
|
}
|
|
|
|
//------------------------------------------------------------------
|
|
template <typename RASTER, typename PIXEL>
|
|
void Iwa_FractalNoiseFx::outputRaster(const RASTER outRas, double *out_buf,
|
|
const FNParam ¶m) {
|
|
TDimension dim = outRas->getSize();
|
|
double *buf_p = out_buf;
|
|
bool doClamp = !(outRas->getPixelSize() == 16);
|
|
for (int j = 0; j < dim.ly; j++) {
|
|
PIXEL *pix = outRas->pixels(j);
|
|
for (int i = 0; i < dim.lx; i++, pix++, buf_p++) {
|
|
double val = (param.invert) ? 1.0 - (*buf_p) : (*buf_p);
|
|
if (doClamp) val = clamp(val, 0.0, 1.0);
|
|
typename PIXEL::Channel chan = static_cast<typename PIXEL::Channel>(
|
|
val * (double)PIXEL::maxChannelValue);
|
|
pix->r = chan;
|
|
pix->g = chan;
|
|
pix->b = chan;
|
|
pix->m = (param.alphaRendering) ? chan : PIXEL::maxChannelValue;
|
|
}
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------
|
|
|
|
void Iwa_FractalNoiseFx::getParamUIs(TParamUIConcept *&concepts, int &length) {
|
|
concepts = new TParamUIConcept[length = 2];
|
|
|
|
concepts[0].m_type = TParamUIConcept::POINT;
|
|
concepts[0].m_label = "Offset Turbulence";
|
|
concepts[0].m_params.push_back(m_offsetTurbulence);
|
|
|
|
concepts[1].m_type = TParamUIConcept::POINT;
|
|
concepts[1].m_label = "Sub Offset";
|
|
concepts[1].m_params.push_back(m_subOffset);
|
|
}
|
|
//------------------------------------------------------------------
|
|
// For Dynamic and Dynamic Twist patterns, the position offsets using gradient /
|
|
// rotation of the parent pattern
|
|
TPointD Iwa_FractalNoiseFx::getSamplePos(double x, double y,
|
|
const TDimension outDim,
|
|
const double *out_buf, const int gen,
|
|
const double scale,
|
|
const FNParam ¶m) {
|
|
// the position does not offset in the first generation
|
|
if (gen == 0 || param.dynamicIntensity == 0.0 ||
|
|
(param.fractalType != Dynamic && param.fractalType != DynamicTwist))
|
|
return TPointD(x, y);
|
|
|
|
auto clampPos = [&](double x, double y) {
|
|
if (x < 0.0)
|
|
x = 0.0;
|
|
else if (x > (double)(outDim.lx - 1))
|
|
x = (double)(outDim.lx - 1);
|
|
if (y < 0.0)
|
|
y = 0.0;
|
|
else if (y > (double)(outDim.ly - 1))
|
|
y = (double)(outDim.ly - 1);
|
|
return TPointD(x, y);
|
|
};
|
|
|
|
auto val = [&](const TPoint &p) {
|
|
return out_buf[std::min(p.y, outDim.ly - 1) * outDim.lx +
|
|
std::min(p.x, outDim.lx - 1)];
|
|
};
|
|
auto lerp = [](double v0, double v1, double ratio) {
|
|
return (1.0 - ratio) * v0 + ratio * v1;
|
|
};
|
|
auto lerpVal = [&](const TPointD &p) {
|
|
int id_x = (int)std::floor(p.x);
|
|
double ratio_x = p.x - (double)id_x;
|
|
int id_y = (int)std::floor(p.y);
|
|
double ratio_y = p.y - (double)id_y;
|
|
return lerp(
|
|
lerp(val(TPoint(id_x, id_y)), val(TPoint(id_x + 1, id_y)), ratio_x),
|
|
lerp(val(TPoint(id_x, id_y + 1)), val(TPoint(id_x + 1, id_y + 1)),
|
|
ratio_x),
|
|
ratio_y);
|
|
};
|
|
int range = std::max(2, (int)(0.1 / scale));
|
|
TPointD left = clampPos(x - range, y);
|
|
TPointD right = clampPos(x + range, y);
|
|
TPointD down = clampPos(x, y - range);
|
|
TPointD up = clampPos(x, y + range);
|
|
|
|
double dif_x = param.dynamicIntensity * (1 / scale) *
|
|
(lerpVal(left) - lerpVal(right)) / (left.x - right.x);
|
|
double dif_y = param.dynamicIntensity * (1 / scale) *
|
|
(lerpVal(up) - lerpVal(down)) / (up.y - down.y);
|
|
|
|
if (param.fractalType == Dynamic)
|
|
return TPointD(x + dif_x, y + dif_y); // gradient
|
|
else // Dynamic_twist
|
|
return TPointD(x + dif_y, y - dif_x); // rotation
|
|
}
|
|
|
|
//------------------------------------------------------------------
|
|
// convert the noise
|
|
void Iwa_FractalNoiseFx::convert(double *buf, const FNParam ¶m) {
|
|
if (param.fractalType == Basic || param.fractalType == Dynamic ||
|
|
param.fractalType == DynamicTwist)
|
|
return;
|
|
|
|
switch (param.fractalType) {
|
|
case TurbulentSmooth:
|
|
*buf = std::pow(std::abs(*buf - 0.5), 2.0) * 3.75;
|
|
*buf = to_linear_color_space(*buf, 1.0, turbulentGamma);
|
|
break;
|
|
case TurbulentBasic:
|
|
*buf = std::pow(std::abs(*buf - 0.5), 1.62) * 4.454;
|
|
*buf = to_linear_color_space(*buf, 1.0, turbulentGamma);
|
|
break;
|
|
case TurbulentSharp:
|
|
*buf = std::pow(std::abs(*buf - 0.5), 0.725) * 1.77;
|
|
*buf = to_linear_color_space(*buf, 1.0, turbulentGamma);
|
|
break;
|
|
case Max:
|
|
*buf = std::abs(*buf - 0.5) * 1.96;
|
|
break;
|
|
case Rocky:
|
|
// conversion LUT for the range from 0.43 to 0.57, every 0.01
|
|
static double table[15] = {
|
|
0.25, 0.256658635, 0.275550218, 0.30569519, 0.345275591,
|
|
0.392513494, 0.440512, 0.5, 0.555085147, 0.607486506,
|
|
0.654724409, 0.69430481, 0.724449782, 0.743341365, 0.75};
|
|
if (*buf <= 0.43)
|
|
*buf = 0.25;
|
|
else if (*buf >= 0.57)
|
|
*buf = 0.75;
|
|
else {
|
|
int id = (int)std::floor(*buf * 100.0) - 43;
|
|
double t = *buf * 100.0 - (double)(id + 43);
|
|
// linear interpolation the LUT values
|
|
*buf = (1 - t) * table[id] + t * table[id + 1];
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------
|
|
// composite the base noise pattern
|
|
void Iwa_FractalNoiseFx::composite(double *out, double *buf,
|
|
const double influence,
|
|
const FNParam ¶m) {
|
|
switch (param.fractalType) {
|
|
case Basic:
|
|
case Dynamic:
|
|
case DynamicTwist:
|
|
case Rocky: {
|
|
// hard light composition
|
|
double val = hardlight(out, buf);
|
|
*out = (1.0 - influence) * (*out) + influence * val;
|
|
break;
|
|
}
|
|
case TurbulentSmooth:
|
|
case TurbulentBasic:
|
|
case TurbulentSharp:
|
|
// add composition in the linear color space
|
|
*out += (*buf) * influence;
|
|
break;
|
|
case Max:
|
|
// max composition
|
|
*out = std::max(*out, influence * (*buf));
|
|
break;
|
|
default: {
|
|
double val = hardlight(out, buf);
|
|
*out = (1.0 - influence) * (*out) + influence * val;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------
|
|
// finalize pattern (converting the color space)
|
|
void Iwa_FractalNoiseFx::finalize(double *out, const FNParam ¶m) {
|
|
assert(param.fractalType == TurbulentSmooth ||
|
|
param.fractalType == TurbulentBasic ||
|
|
param.fractalType == TurbulentSharp);
|
|
|
|
// TurbulentSmooth / TurbulentBasic / TurbulentSharp
|
|
*out = to_nonlinear_color_space(*out, 1.0, turbulentGamma);
|
|
}
|
|
|
|
FX_PLUGIN_IDENTIFIER(Iwa_FractalNoiseFx, "iwa_FractalNoiseFx");
|