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WIP on clouds

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This commit is contained in:
Michaël Lemaire 2016-02-02 17:58:36 +01:00
parent aa82a332d9
commit 6a5b55b077
19 changed files with 147 additions and 387 deletions
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13
src/basics/FractalNoise.cpp
View file

@ -166,6 +166,19 @@ void FractalNoise::estimateRange(double *min, double *max, double detail) const
}
}
void FractalNoise::normalizeRange(double norm, double detail, bool adjust_scaling) {
double min, max;
estimateRange(&min, &max, detail);
if (max > 0.0) {
double factor = norm / max;
height *= factor;
if (adjust_scaling) {
scaling /= factor;
}
}
}
double FractalNoise::getBase1d(double x) const {
return getBase2d(x, 0.0);
}

7
src/basics/FractalNoise.h
View file

@ -59,6 +59,13 @@ class BASICSSHARED_EXPORT FractalNoise {
*/
void estimateRange(double *min, double *max, double detail = 0.000001) const;
/**
* Normalize the range of values, to be in [-norm, norm], for the given detail.
*
* If "adjust_scaling" is set to true, scaling will be changed accordingly.
*/
void normalizeRange(double norm = 1.0, double detail = 0.000001, bool adjust_scaling = false);
virtual double getBase1d(double x) const;
virtual double getBase2d(double x, double y) const;
/**

6
src/definition/CloudLayerDefinition.cpp
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@ -8,7 +8,7 @@
CloudLayerDefinition::CloudLayerDefinition(DefinitionNode *parent, const string &name)
: DefinitionNode(parent, name, "cloudlayer") {
type = CIRRUS;
type = STRATOCUMULUS;
altitude = 0.5;
scaling = 0.5;
coverage = 0.5;
@ -64,8 +64,7 @@ void CloudLayerDefinition::load(PackStream *stream) {
void CloudLayerDefinition::copy(DefinitionNode *_destination) const {
DefinitionNode::copy(_destination);
CloudLayerDefinition *destination = (CloudLayerDefinition *)_destination;
if (auto destination = static_cast<CloudLayerDefinition *>(_destination)) {
destination->type = type;
destination->altitude = altitude;
destination->scaling = scaling;
@ -73,6 +72,7 @@ void CloudLayerDefinition::copy(DefinitionNode *_destination) const {
noise_state.copy(&destination->noise_state);
}
}
void CloudLayerDefinition::validate() {
DefinitionNode::validate();

18
src/definition/CloudLayerDefinition.h
View file

@ -36,16 +36,16 @@ class DEFINITIONSHARED_EXPORT CloudLayerDefinition : public DefinitionNode {
public:
typedef enum {
STRATUS,
NIMBOSTRATUS,
CUMULUS,
//STRATUS,
//NIMBOSTRATUS,
//CUMULUS,
STRATOCUMULUS,
ALTOCUMULUS,
ALTOSTRATUS,
CUMULONIMBUS,
CIRROCUMULUS,
CIRROSTRATUS,
CIRRUS,
//ALTOCUMULUS,
//ALTOSTRATUS,
//CUMULONIMBUS,
//CIRROCUMULUS,
//CIRROSTRATUS,
//CIRRUS,
_COUNT
} CloudsType;

33
src/interface/commandline/tests.cpp
View file

@ -467,8 +467,9 @@ static void testCloudsLighting() {
*min_altitude = 10.0 - scale;
*max_altitude = 10.0 + scale;
}
virtual double getDensity(const Vector3 &location, double) const override {
return 1.0 - location.sub(Vector3(0.0, 10.0, 0.0)).getNorm() / scale;
virtual CloudDensityInfo getDensity(const Vector3 &location, double) const override {
double val = 1.0 - location.sub(Vector3(0.0, 10.0, 0.0)).getNorm() / scale;
return {val, val};
}
double scale;
};
@ -582,19 +583,19 @@ static void testCanvasAliasing() {
}
void runTestSuite() {
testNoise();
testCanvasAliasing();
testTextures();
testGodRays();
testCelestialBodies();
testNearFrustum();
testCloudsLighting();
// testNoise();
// testCanvasAliasing();
// testTextures();
// testGodRays();
// testCelestialBodies();
// testNearFrustum();
// testCloudsLighting();
testCloudModels();
testCloudsNearGround();
testVegetationModels();
testOpenGLVegetationImpostor();
testRasterizationQuality();
testGroundShadowQuality();
testCloudQuality();
testAtmosphereBruneton();
// testCloudsNearGround();
// testVegetationModels();
// testOpenGLVegetationImpostor();
// testRasterizationQuality();
// testGroundShadowQuality();
// testCloudQuality();
// testAtmosphereBruneton();
}

1
src/render/software/BaseCloudLayerRenderer.cpp
View file

@ -2,6 +2,7 @@
#include "clouds/BaseCloudsModel.h"
#include "Vector3.h"
#include "Color.h"
BaseCloudLayerRenderer::BaseCloudLayerRenderer(SoftwareRenderer *parent) : parent(parent) {
setQuality(0.5);

44
src/render/software/CloudBasicLayerRenderer.cpp
View file

@ -51,7 +51,7 @@ int CloudBasicLayerRenderer::findSegments(BaseCloudsModel *model, const Vector3
double current_total_length, current_inside_length;
double step_length, segment_length;
double min_step, max_step;
double noise_distance, previous_noise_distance;
BaseCloudsModel::CloudDensityInfo info, previous_info;
Vector3 walker, step, segment_start, offset;
double render_precision;
@ -77,9 +77,9 @@ int CloudBasicLayerRenderer::findSegments(BaseCloudsModel *model, const Vector3
segment_length = 0.0;
walker = start;
offset = Vector3(model->getLayer()->propXOffset()->getValue(), 0.0, model->getLayer()->propZOffset()->getValue());
noise_distance = model->getDensity(start.add(offset), base_detail);
previous_noise_distance = noise_distance;
inside = noise_distance > 0.0;
info = model->getDensity(start.add(offset), 1.0);
previous_info = info;
inside = info.density > 0.0;
if (inside) {
segment_start = start;
}
@ -89,19 +89,24 @@ int CloudBasicLayerRenderer::findSegments(BaseCloudsModel *model, const Vector3
do {
walker = walker.add(step);
step_length = step.getNorm();
noise_distance = stop ? 0.0 : model->getDensity(walker.add(offset), base_detail);
if (stop) {
info.density = 0.0;
info.border_distance = 0.0;
} else {
info = model->getDensity(walker.add(offset), 1.0);
}
current_total_length += step_length;
if (noise_distance > 0.0) {
if (info.density > 0.0) {
if (inside) {
// inside the cloud
segment_length += step_length;
current_inside_length += step_length;
step = direction.scale((noise_distance < 1.0) ? render_precision : (noise_distance * render_precision));
step = direction.scale((info.border_distance < 1.0) ? render_precision : (info.border_distance * render_precision));
} else {
// entering the cloud
inside = 1;
segment_length = step_length - Maths::zeroPoint(step_length, previous_noise_distance, noise_distance);
segment_length = step_length - Maths::zeroPoint(step_length, previous_info.density, info.density);
assert(segment_length >= 0.0 && segment_length <= step_length);
segment_start = walker.add(direction.scale(-segment_length));
current_inside_length += segment_length;
@ -110,7 +115,7 @@ int CloudBasicLayerRenderer::findSegments(BaseCloudsModel *model, const Vector3
} else {
if (inside) {
// exiting the cloud
double exit_length = Maths::zeroPoint(step_length, previous_noise_distance, noise_distance);
double exit_length = Maths::zeroPoint(step_length, previous_info.density, info.density);
assert(exit_length >= 0.0);
segment_length += exit_length;
current_inside_length += exit_length;
@ -128,12 +133,12 @@ int CloudBasicLayerRenderer::findSegments(BaseCloudsModel *model, const Vector3
} else {
// searching for a cloud
step =
direction.scale((noise_distance > -1.0) ? render_precision : (-noise_distance * render_precision));
direction.scale((info.border_distance < 1.0) ? render_precision : (info.border_distance * render_precision));
}
}
render_precision *= 1.0 + 0.001 / (quality + 0.1);
previous_noise_distance = noise_distance;
previous_info = info;
stop = not(walker.y >= ymin - 0.001 && walker.y <= ymax + 0.001 && current_total_length < max_total_length &&
current_inside_length < max_inside_length);
} while (inside or not stop);
@ -143,14 +148,6 @@ int CloudBasicLayerRenderer::findSegments(BaseCloudsModel *model, const Vector3
return segment_count;
}
static inline Vector3 _getPseudoNormal(const BaseCloudsModel *model, const Vector3 &base, const Vector3 &direction) {
double precision = 0.3;
double base_density = model->getDensity(base, precision); // TODO keep
double density = model->getDensity(base.add(direction.scale(precision * 10.0)), precision);
double diff = base_density - density;
return direction.scale(diff > 0.0 ? diff : 0.0);
}
Color CloudBasicLayerRenderer::getColor(BaseCloudsModel *model, const Vector3 &eye, const Vector3 &location) {
int i, segment_count;
double max_length, total_length, inside_length;
@ -183,15 +180,8 @@ Color CloudBasicLayerRenderer::getColor(BaseCloudsModel *model, const Vector3 &e
segment_count = findSegments(model, start, direction, 30, transparency_depth, max_length, &inside_length,
&total_length, segments, 0.001);
for (i = segment_count - 1; i >= 0; i--) {
Vector3 normal = VECTOR_ZERO;
const Vector3 &location = segments[i].start;
normal = normal.add(_getPseudoNormal(model, location, VECTOR_UP));
normal = normal.add(_getPseudoNormal(model, location, VECTOR_DOWN));
normal = normal.add(_getPseudoNormal(model, location, VECTOR_EAST));
normal = normal.add(_getPseudoNormal(model, location, VECTOR_WEST));
normal = normal.add(_getPseudoNormal(model, location, VECTOR_NORTH));
normal = normal.add(_getPseudoNormal(model, location, VECTOR_SOUTH));
col = parent->applyLightingToSurface(location, normal.normalize(), material);
col = parent->applyLightingToSurface(location, model->getNormal(location, 1.0), material);
col.a = (segments[i].length >= transparency_depth) ? 1.0 : (segments[i].length / transparency_depth);
result.mask(col);

19
src/render/software/CloudsRenderer.cpp
View file

@ -8,11 +8,9 @@
#include "CloudBasicLayerRenderer.h"
#include "CameraDefinition.h"
#include "Logs.h"
#include "Color.h"
#include "clouds/BaseCloudsModel.h"
#include "clouds/CloudModelAltoCumulus.h"
#include "clouds/CloudModelCirrus.h"
#include "clouds/CloudModelCumuloNimbus.h"
#include "clouds/CloudModelStratoCumulus.h"
CloudsRenderer::CloudsRenderer(SoftwareRenderer *parent) : parent(parent) {
@ -70,21 +68,6 @@ void CloudsRenderer::update() {
case CloudLayerDefinition::STRATOCUMULUS:
model = new CloudModelStratoCumulus(layer);
break;
case CloudLayerDefinition::ALTOCUMULUS:
model = new CloudModelAltoCumulus(layer);
break;
case CloudLayerDefinition::CIRRUS:
model = new CloudModelCirrus(layer);
break;
case CloudLayerDefinition::CUMULONIMBUS:
model = new CloudModelCumuloNimbus(layer);
break;
case CloudLayerDefinition::STRATUS:
case CloudLayerDefinition::NIMBOSTRATUS:
case CloudLayerDefinition::CUMULUS:
case CloudLayerDefinition::ALTOSTRATUS:
case CloudLayerDefinition::CIRROCUMULUS:
case CloudLayerDefinition::CIRROSTRATUS:
case CloudLayerDefinition::_COUNT:
model = new BaseCloudsModel(layer);
break;

32
src/render/software/clouds/BaseCloudsModel.cpp
View file

@ -1,6 +1,7 @@
#include "BaseCloudsModel.h"
#include "CloudLayerDefinition.h"
#include "Vector3.h"
BaseCloudsModel::BaseCloudsModel(CloudLayerDefinition *layer) : layer(layer) {
}
@ -24,21 +25,26 @@ void BaseCloudsModel::getDetailRange(double *min_step, double *max_step) const {
*max_step = thickness * 0.2;
}
double BaseCloudsModel::getProbability(const Vector3 &, double) const {
// FIXME not used !
return 1.0;
BaseCloudsModel::CloudDensityInfo BaseCloudsModel::getDensity(const Vector3 &, double) const {
return {0.0, 1.0};
}
double BaseCloudsModel::getDensity(const Vector3 &, double) const {
return 0.0;
static inline Vector3 _getPseudoNormal(const BaseCloudsModel *model, const Vector3 &base, const Vector3 &direction, double base_density, double precision) {
double density = model->getDensity(base.add(direction.scale(precision * 10.0)), precision).density;
double diff = base_density - density;
return direction.scale(diff > 0.0 ? diff : 0.0);
}
Color BaseCloudsModel::filterLight(const Color &light, double, double) const {
// FIXME not used !
return light;
}
Color BaseCloudsModel::applyLightExit(const Color &light, const Vector3 &, const Vector3 &) const {
// FIXME not used !
return light;
Vector3 BaseCloudsModel::getNormal(const Vector3 &location, double quality) const
{
double precision = 0.3;
Vector3 normal = VECTOR_ZERO;
double base_density = getDensity(location, precision).density;
normal = normal.add(_getPseudoNormal(this, location, VECTOR_UP, base_density, precision));
normal = normal.add(_getPseudoNormal(this, location, VECTOR_DOWN, base_density, precision));
normal = normal.add(_getPseudoNormal(this, location, VECTOR_EAST, base_density, precision));
normal = normal.add(_getPseudoNormal(this, location, VECTOR_WEST, base_density, precision));
normal = normal.add(_getPseudoNormal(this, location, VECTOR_NORTH, base_density, precision));
normal = normal.add(_getPseudoNormal(this, location, VECTOR_SOUTH, base_density, precision));
return normal.normalize();
}

34
src/render/software/clouds/BaseCloudsModel.h
View file

@ -3,8 +3,6 @@
#include "../software_global.h"
#include "Color.h"
namespace paysages {
namespace software {
@ -12,23 +10,39 @@ namespace software {
* Abstract class for all cloud models (cirrus, cumulus...).
*/
class SOFTWARESHARED_EXPORT BaseCloudsModel {
public:
typedef struct {
double density;
double border_distance;
} CloudDensityInfo;
public:
BaseCloudsModel(CloudLayerDefinition *layer);
virtual ~BaseCloudsModel();
inline CloudLayerDefinition *getLayer() const {
return layer;
}
virtual void update();
virtual void getAltitudeRange(double *min_altitude, double *max_altitude) const;
virtual void getDetailRange(double *min_step, double *max_step) const;
virtual double getProbability(const Vector3 &location, double radius) const;
virtual double getDensity(const Vector3 &location, double precision) const;
virtual Color filterLight(const Color &light, double length, double density) const;
virtual Color applyLightExit(const Color &light, const Vector3 &light_direction,
const Vector3 &direction_to_eye) const;
inline CloudLayerDefinition *getLayer() const {
return layer;
}
/**
* Get the cloud density info at a given location.
*
* This will contain the local density (0.0-1.0), and an estimated distance to the nearest border.
*/
virtual CloudDensityInfo getDensity(const Vector3 &location, double quality) const;
/**
* Get the normal vector at a given location, to be used by lighting.
*
* The length of the result vector indicates its relevance. A short vector marks an area
* where applying a normal vector is not relevant.
*/
virtual Vector3 getNormal(const Vector3 &location, double quality) const;
protected:
CloudLayerDefinition *layer;

56
src/render/software/clouds/CloudModelAltoCumulus.cpp
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@ -1,56 +0,0 @@
#include "CloudModelAltoCumulus.h"
#include "NoiseGenerator.h"
#include "Vector3.h"
#include "CloudLayerDefinition.h"
CloudModelAltoCumulus::CloudModelAltoCumulus(CloudLayerDefinition *layer) : BaseCloudsModel(layer) {
noise = new NoiseGenerator();
}
CloudModelAltoCumulus::~CloudModelAltoCumulus() {
delete noise;
}
void CloudModelAltoCumulus::update() {
noise->clearLevels();
noise->addLevelSimple(4.0, -1.0, 1.0);
noise->addLevelSimple(1.0 / 2.0, -0.6, 0.6);
noise->addLevelSimple(1.0 / 4.0, -0.3, 0.3);
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 / 60.0, -0.03, 0.03);
noise->addLevelSimple(1.0 / 80.0, -0.015, 0.015);
noise->addLevelSimple(1.0 / 100.0, -0.06, 0.06);
noise->normalizeAmplitude(-4.0, 3.0, 0);
noise->setState(layer->getNoiseState());
}
void CloudModelAltoCumulus::getAltitudeRange(double *min_altitude, double *max_altitude) const {
*min_altitude = 15.0 + 10.0 * layer->altitude;
*max_altitude = *min_altitude + 18.0 * layer->scaling;
}
double CloudModelAltoCumulus::getDensity(const Vector3 &location, double) const {
double val;
double min_altitude, max_altitude;
double noise_scaling = 18.0 * layer->scaling;
getAltitudeRange(&min_altitude, &max_altitude);
if (location.y < min_altitude || location.y > max_altitude) {
return 0.0;
} else {
double x = 0.6 * location.x / noise_scaling;
double y = (location.y - min_altitude) / noise_scaling;
double z = 0.6 * location.z / noise_scaling;
// double coverage = layer->coverage * layer->_coverage_by_altitude->getValue((position.y - layer->altitude) /
// layer->scaling);
double coverage = layer->coverage;
val = 0.5 * noise->get3DTotal(x, y, z);
return val - 1.1 + coverage;
}
}

27
src/render/software/clouds/CloudModelAltoCumulus.h
View file

@ -1,27 +0,0 @@
#ifndef CLOUDMODELALTOCUMULUS_H
#define CLOUDMODELALTOCUMULUS_H
#include "../software_global.h"
#include "BaseCloudsModel.h"
namespace paysages {
namespace software {
class CloudModelAltoCumulus : public BaseCloudsModel {
public:
CloudModelAltoCumulus(CloudLayerDefinition *layer);
virtual ~CloudModelAltoCumulus();
virtual void update() override;
virtual void getAltitudeRange(double *min_altitude, double *max_altitude) const override;
virtual double getDensity(const Vector3 &location, double precision) const override;
private:
NoiseGenerator *noise;
};
}
}
#endif // CLOUDMODELALTOCUMULUS_H

54
src/render/software/clouds/CloudModelCirrus.cpp
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@ -1,54 +0,0 @@
#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, double) 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;
}
}

27
src/render/software/clouds/CloudModelCirrus.h
View file

@ -1,27 +0,0 @@
#ifndef CLOUDMODELCIRRUS_H
#define CLOUDMODELCIRRUS_H
#include "../software_global.h"
#include "BaseCloudsModel.h"
namespace paysages {
namespace software {
class CloudModelCirrus : public BaseCloudsModel {
public:
CloudModelCirrus(CloudLayerDefinition *layer);
virtual ~CloudModelCirrus();
virtual void update() override;
virtual void getAltitudeRange(double *min_altitude, double *max_altitude) const override;
virtual double getDensity(const Vector3 &location, double precision) const override;
private:
NoiseGenerator *noise;
};
}
}
#endif // CLOUDMODELCIRRUS_H

61
src/render/software/clouds/CloudModelCumuloNimbus.cpp
View file

@ -1,61 +0,0 @@
#include "CloudModelCumuloNimbus.h"
#include "NoiseGenerator.h"
#include "Vector3.h"
#include "CloudLayerDefinition.h"
CloudModelCumuloNimbus::CloudModelCumuloNimbus(CloudLayerDefinition *layer) : BaseCloudsModel(layer) {
noise = new NoiseGenerator();
}
CloudModelCumuloNimbus::~CloudModelCumuloNimbus() {
delete noise;
}
void CloudModelCumuloNimbus::update() {
noise->clearLevels();
noise->addLevelSimple(8.0, -1.0, 1.0);
noise->addLevelSimple(7.0 / 2.0, -0.6, 0.6);
noise->addLevelSimple(6.0 / 4.0, -0.3, 0.3);
noise->addLevelSimple(5.0 / 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 / 60.0, -0.03, 0.03);*/
noise->addLevelSimple(1.0 / 80.0, -0.015, 0.015);
noise->addLevelSimple(1.0 / 100.0, -0.06, 0.06);
noise->addLevelSimple(1.0 / 150.0, -0.015, 0.015);
noise->addLevelSimple(1.0 / 200.0, -0.009, 0.009);
noise->addLevelSimple(1.0 / 400.0, -0.024, 0.024);
noise->addLevelSimple(1.0 / 800.0, -0.003, 0.003);
noise->addLevelSimple(1.0 / 1000.0, -0.0015, 0.0015);
noise->normalizeAmplitude(-3.0, 4.0, 0);
noise->setState(layer->getNoiseState());
}
void CloudModelCumuloNimbus::getAltitudeRange(double *min_altitude, double *max_altitude) const {
*min_altitude = 5.0 + 10.0 * layer->altitude;
*max_altitude = *min_altitude + 50.0 + 50.0 * layer->scaling;
}
double CloudModelCumuloNimbus::getDensity(const Vector3 &location, double) const {
double val;
double min_altitude, max_altitude;
double noise_scaling = 60.0 * layer->scaling;
getAltitudeRange(&min_altitude, &max_altitude);
if (location.y < min_altitude || location.y > max_altitude) {
return 0.0;
} else {
double x = 1.5 * location.x / noise_scaling;
double y = (location.y - min_altitude) / noise_scaling;
double z = 1.5 * location.z / noise_scaling;
// double coverage = layer->coverage * layer->_coverage_by_altitude->getValue((position.y - layer->altitude) /
// layer->scaling);
double coverage = layer->coverage;
val = 0.5 * noise->get3DTotal(x, y, z);
return val - 1.0 + coverage;
}
}

27
src/render/software/clouds/CloudModelCumuloNimbus.h
View file

@ -1,27 +0,0 @@
#ifndef CLOUDMODELCUMULONIMBUS_H
#define CLOUDMODELCUMULONIMBUS_H
#include "../software_global.h"
#include "BaseCloudsModel.h"
namespace paysages {
namespace software {
class CloudModelCumuloNimbus : public BaseCloudsModel {
public:
CloudModelCumuloNimbus(CloudLayerDefinition *layer);
virtual ~CloudModelCumuloNimbus();
virtual void update() override;
virtual void getAltitudeRange(double *min_altitude, double *max_altitude) const override;
virtual double getDensity(const Vector3 &location, double precision) const override;
private:
NoiseGenerator *noise;
};
}
}
#endif // CLOUDMODELCUMULONIMBUS_H

47
src/render/software/clouds/CloudModelStratoCumulus.cpp
View file

@ -1,11 +1,13 @@
#include "CloudModelStratoCumulus.h"
#include "NoiseGenerator.h"
#include <cmath>
#include "NoiseFunctionSimplex.h"
#include "Vector3.h"
#include "CloudLayerDefinition.h"
CloudModelStratoCumulus::CloudModelStratoCumulus(CloudLayerDefinition *layer) : BaseCloudsModel(layer) {
noise = new NoiseGenerator();
noise = new NoiseFunctionSimplex();
base_detail = 0.1;
}
CloudModelStratoCumulus::~CloudModelStratoCumulus() {
@ -13,23 +15,10 @@ CloudModelStratoCumulus::~CloudModelStratoCumulus() {
}
void CloudModelStratoCumulus::update() {
noise->clearLevels();
noise->addLevelSimple(1.0, -1.0, 1.0);
noise->addLevelSimple(1.0 / 2.0, -0.6, 0.6);
noise->addLevelSimple(1.0 / 4.0, -0.3, 0.3);
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 / 60.0, -0.03, 0.03);
noise->addLevelSimple(1.0 / 80.0, -0.015, 0.015);
noise->addLevelSimple(1.0 / 100.0, -0.06, 0.06);
noise->addLevelSimple(1.0 / 150.0, -0.015, 0.015);
noise->addLevelSimple(1.0 / 200.0, -0.009, 0.009);
noise->addLevelSimple(1.0 / 400.0, -0.024, 0.024);
noise->addLevelSimple(1.0 / 800.0, -0.003, 0.003);
noise->addLevelSimple(1.0 / 1000.0, -0.0015, 0.0015);
noise->normalizeAmplitude(-3.0, 3.0, 0);
noise->setState(layer->getNoiseState());
noise->setScaling(30.0 * layer->scaling);
noise->normalizeRange(1.0, base_detail);
}
void CloudModelStratoCumulus::getAltitudeRange(double *min_altitude, double *max_altitude) const {
@ -37,25 +26,19 @@ void CloudModelStratoCumulus::getAltitudeRange(double *min_altitude, double *max
*max_altitude = *min_altitude + 11.0 * layer->scaling;
}
double CloudModelStratoCumulus::getDensity(const Vector3 &location, double precision) const {
BaseCloudsModel::CloudDensityInfo CloudModelStratoCumulus::getDensity(const Vector3 &location, double quality) 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;
if (location.y < min_altitude) {
return {0.0, min_altitude - location.y};
} else if (location.y > max_altitude) {
return {0.0, location.y - max_altitude};
} else {
double x = 0.3 * location.x / noise_scaling;
double y = (location.y - min_altitude) / noise_scaling;
double z = 0.3 * location.z / noise_scaling;
// double coverage = layer->coverage * layer->_coverage_by_altitude->getValue((position.y - layer->altitude) /
// layer->scaling);
double coverage = layer->coverage;
val = 0.5 * noise->get3DDetail(x, y, z, precision);
return val - 0.9 + coverage;
val = noise->get3d(base_detail, 0.3 * location.x, location.y - min_altitude, 0.3 * location.z);
val = val - 0.8 + layer->coverage;
return {val, fabs(val)};
}
}

5
src/render/software/clouds/CloudModelStratoCumulus.h
View file

@ -16,10 +16,11 @@ class CloudModelStratoCumulus : public BaseCloudsModel {
virtual void update() override;
virtual void getAltitudeRange(double *min_altitude, double *max_altitude) const override;
virtual double getDensity(const Vector3 &location, double precision) const override;
virtual CloudDensityInfo getDensity(const Vector3 &location, double quality) const override;
private:
NoiseGenerator *noise;
FractalNoise *noise;
double base_detail;
};
}
}

13
src/tests/FractalNoise_Test.cpp
View file

@ -228,3 +228,16 @@ TEST(FractalNoise, estimateRange) {
EXPECT_DOUBLE_EQ(-0.555, min);
EXPECT_DOUBLE_EQ(0.555, max);
}
TEST(FractalNoise, normalizeRange) {
TestFractalNoise noise(0.8);
noise.setScaling(1.0, 1.0);
noise.setStep(0.1);
double min, max;
noise.normalizeRange(1.8, 0.01);
noise.estimateRange(&min, &max, 0.01);
EXPECT_DOUBLE_EQ(-1.8, min);
EXPECT_DOUBLE_EQ(1.8, max);
}