55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
#include "CloudModelCirrus.h"
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#include "NoiseGenerator.h"
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#include "Vector3.h"
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#include "CloudLayerDefinition.h"
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CloudModelCirrus::CloudModelCirrus(CloudLayerDefinition *layer) : BaseCloudsModel(layer) {
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noise = new NoiseGenerator();
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}
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CloudModelCirrus::~CloudModelCirrus() {
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delete noise;
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}
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void CloudModelCirrus::update() {
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noise->clearLevels();
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noise->addLevelSimple(1.0, -1.0, 1.0);
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noise->addLevelSimple(1.0 / 6.0, -0.6, 0.6);
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noise->addLevelSimple(1.0 / 10.0, -0.15, 0.15);
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noise->addLevelSimple(1.0 / 20.0, -0.09, 0.09);
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noise->addLevelSimple(1.0 / 40.0, -0.06, 0.06);
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noise->addLevelSimple(1.0 / 120.0, -0.03, 0.03);
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noise->addLevelSimple(1.0 / 300.0, -0.01, 0.01);
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noise->normalizeAmplitude(-4.0, 3.0, 0);
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noise->setState(layer->getNoiseState());
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}
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void CloudModelCirrus::getAltitudeRange(double *min_altitude, double *max_altitude) const {
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*min_altitude = 45.0 + 20.0 * layer->altitude;
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*max_altitude = *min_altitude + 20.0 * layer->scaling;
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}
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double CloudModelCirrus::getDensity(const Vector3 &location, double) const {
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double val;
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double min_altitude, max_altitude;
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double noise_scaling = 30.0 * layer->scaling;
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getAltitudeRange(&min_altitude, &max_altitude);
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if (location.y < min_altitude || location.y > max_altitude) {
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return 0.0;
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} else {
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double x = 0.03 * location.x / noise_scaling;
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double y = (location.y - min_altitude) / noise_scaling;
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double z = 0.03 * location.z / noise_scaling;
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// double coverage = layer->coverage * layer->_coverage_by_altitude->getValue((position.y - layer->altitude) /
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// layer->scaling);
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double coverage = layer->coverage;
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val = 0.6 * noise->get3DTotal(x, y, z);
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return val - 1.1 + coverage;
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}
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}
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