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