Restored clouds aspect preview

src/render/preview/CloudsAspectPreviewRenderer.cpp

@@ -2,6 +2,7 @@
 
 #include "BasePreview.h"
 #include "Scenery.h"
+#include "clouds/BaseCloudsModel.h"
 #include "CloudsDefinition.h"
 #include "CloudLayerDefinition.h"
 #include "CloudsRenderer.h"
@@ -9,43 +10,78 @@
 #include "LightComponent.h"
 #include "AtmosphereResult.h"
 
-/*static void _getLightingStatus(Renderer*, LightStatus* status, Vector3, int)
+class FakeCloudModel:public BaseCloudsModel
 {
-    LightComponent light;
-
-    light.color.r = 0.5;
-    light.color.g = 0.5;
-    light.color.b = 0.5;
-    light.direction = Vector3(-1.0, 0.5, 1.0).normalize();
-    light.altered = 1;
-    light.reflection = 0.0;
-    status->pushComponent(light);
-
-    light.color.r = 0.1;
-    light.color.g = 0.1;
-    light.color.b = 0.1;
-    light.direction = Vector3(1.0, -0.5, -1.0).normalize();
-    light.altered = 0;
-    light.reflection = 0.0;
-    status->pushComponent(light);
-}
-
-static double _getDensity(Renderer*, CloudLayerDefinition* layer, Vector3 location)
-{
-    double distance = 2.0 * v3Norm(location) / layer->scaling;
-    if (distance > 1.0)
+public:
+    FakeCloudModel(BaseCloudsModel* real_model):
+        BaseCloudsModel(real_model->getLayer()), real_model(real_model)
     {
-        return 0.0;
     }
-    else if (distance < 0.8)
+
+    virtual ~FakeCloudModel()
     {
-        return 1.0;
+        delete real_model;
     }
-    else
+
+    virtual void update()
     {
-        return (1.0 - distance) / 0.2;
+        real_model->update();
     }
-}*/
+
+    virtual void getAltitudeRange(double *min_altitude, double *max_altitude) const
+    {
+        real_model->getAltitudeRange(min_altitude, max_altitude);
+    }
+
+    virtual void getDetailRange(double *min_step, double *max_step) const
+    {
+        real_model->getDetailRange(min_step, max_step);
+        *min_step *= 0.4;
+        *max_step *= 0.4;
+    }
+
+    virtual double getProbability(const Vector3 &location, double radius) const
+    {
+        return real_model->getProbability(location, radius);
+    }
+
+    virtual Color filterLight(const Color &light, double length, double density) const
+    {
+        return real_model->filterLight(light, length, density);
+    }
+
+    virtual Color applyLightExit(const Color &light, const Vector3 &light_direction, const Vector3 &direction_to_eye) const
+    {
+        return real_model->applyLightExit(light, light_direction, direction_to_eye);
+    }
+
+    virtual double getDensity(const Vector3 &location) const override
+    {
+        double ymin, ymax, thickness;
+        getAltitudeRange(&ymin, &ymax);
+        thickness = ymax - ymin;
+
+        Vector3 center(0.0, ymin + thickness * 0.5, 0.0);
+        double distance = 2.0 * location.sub(center).getNorm() / thickness;
+        double fallout = 0.7;
+        if (distance > 1.0)
+        {
+            return 0.0;
+        }
+        else if (distance < 1.0 - fallout)
+        {
+            return 1.0;
+        }
+        else
+        {
+            double factor = (1.0 - distance) / fallout;
+            return real_model->getDensity(location) * (1.0 - factor) + factor;
+        }
+    }
+
+private:
+    BaseCloudsModel* real_model;
+};
 
 CloudsAspectPreviewRenderer::CloudsAspectPreviewRenderer(CloudLayerDefinition* layer):
     layer(layer)
@@ -60,35 +96,37 @@ CloudsAspectPreviewRenderer::CloudsAspectPreviewRenderer(CloudLayerDefinition* l
 void CloudsAspectPreviewRenderer::bindEvent(BasePreview* preview)
 {
     preview->configScaling(0.5, 2.0, 0.1, 2.0);
+    preview->configHdrToneMapping(true);
 }
 
 void CloudsAspectPreviewRenderer::updateEvent()
 {
     CloudLayerDefinition* preview_layer = getScenery()->getClouds()->getCloudLayer(0);
     layer->copy(preview_layer);
-
-    preview_layer->altitude = -preview_layer->scaling / 2.0;
-    preview_layer->validate();
+    preview_layer->coverage = 0.5;
 
     prepare();
 
-    //disableAerialPerspective();
-    //clouds->getLayerDensity = _getDensity;
-    //atmosphere->getLightingStatus = _getLightingStatus;
+    disableAtmosphere();
+    BaseCloudsModel* real_model = getCloudsRenderer()->getLayerModel(0);
+    getCloudsRenderer()->setLayerModel(0, new FakeCloudModel(real_model), false);
 }
 
 Color CloudsAspectPreviewRenderer::getColor2D(double x, double y, double)
 {
     Vector3 start, end;
-    double thickness = layer->scaling;
+    BaseCloudsModel* model = getCloudsRenderer()->getLayerModel(0);
+    double ymin, ymax, thickness;
+    model->getAltitudeRange(&ymin, &ymax);
+    thickness = ymax - ymin;
 
     start.x = x * thickness * 0.5;
-    start.z = y * thickness * 0.5;
-    start.y = thickness * 0.5;
+    start.y = ymin + (1.0 - y) * thickness * 0.5;
+    start.z = thickness * 0.5;
 
     end.x = start.x;
-    end.z = start.z;
-    end.y = -start.y;
+    end.y = start.y;
+    end.z = -start.z;
 
     return getCloudsRenderer()->getColor(start, end, COLOR_BLUE);
 }

src/render/preview/CloudsCoveragePreviewRenderer.cpp

@@ -11,6 +11,8 @@ CloudsCoveragePreviewRenderer::CloudsCoveragePreviewRenderer(CloudLayerDefinitio
 {
     perspective = true;
 
+    render_quality = 6;
+
     CloudsDefinition* clouds = getScenery()->getClouds();
     clouds->clear();
     clouds->addLayer();

src/render/preview/TerrainShapePreviewRenderer.cpp

@@ -50,32 +50,7 @@ void TerrainShapePreviewRenderer::updateEvent()
 
     prepare();
 
-    LightComponent light;
-    std::vector<LightComponent> lights;
-
-    light.color.r = 0.6;
-    light.color.g = 0.6;
-    light.color.b = 0.6;
-    light.direction.x = -1.0;
-    light.direction.y = -0.5;
-    light.direction.z = 1.0;
-    light.direction = light.direction.normalize();
-    light.altered = 1;
-    light.reflection = 0.0;
-    lights.push_back(light);
-
-    light.color.r = 0.2;
-    light.color.g = 0.2;
-    light.color.b = 0.2;
-    light.direction.x = 1.0;
-    light.direction.y = -0.5;
-    light.direction.z = -1.0;
-    light.direction = light.direction.normalize();
-    light.altered = 0;
-    light.reflection = 0.0;
-    lights.push_back(light);
-
-    disableAtmosphere(lights);
+    disableAtmosphere();
 }
 
 Color TerrainShapePreviewRenderer::getColor2D(double x, double y, double scaling)

src/render/software/AtmosphereRenderer.cpp

@@ -106,9 +106,16 @@ AtmosphereResult BaseAtmosphereRenderer::getSkyColor(Vector3)
 
 Vector3 BaseAtmosphereRenderer::getSunDirection()
 {
-    AtmosphereDefinition* atmosphere = getDefinition();
-    double sun_angle = (atmosphere->_daytime + 0.75) * M_PI * 2.0;
-    return Vector3(cos(sun_angle), sin(sun_angle), 0.0);
+    if (lights.size() > 0)
+    {
+        return lights[0].direction.scale(-1.0);
+    }
+    else
+    {
+        AtmosphereDefinition* atmosphere = getDefinition();
+        double sun_angle = (atmosphere->_daytime + 0.75) * M_PI * 2.0;
+        return Vector3(cos(sun_angle), sin(sun_angle), 0.0);
+    }
 }
 
 void BaseAtmosphereRenderer::setBasicLights()

src/render/software/CloudBasicLayerRenderer.cpp

@@ -43,14 +43,14 @@ static inline double _getDistanceToBorder(BaseCloudsModel* model, Vector3 positi
  * @param out_segments Allocated space to fill found segments
  * @return Number of segments found
  */
-static int _findSegments(BaseCloudsModel* model, SoftwareRenderer* renderer, Vector3 start, Vector3 direction, double, int max_segments, double max_inside_length, double max_total_length, double* inside_length, double* total_length, CloudSegment* out_segments)
+static int _findSegments(BaseCloudsModel* model, SoftwareRenderer* renderer, Vector3 start, Vector3 direction, int max_segments, double max_inside_length, double max_total_length, double* inside_length, double* total_length, CloudSegment* out_segments)
 {
-    CloudLayerDefinition* layer = model->getLayer();
     double ymin, ymax;
     int inside, segment_count;
     double current_total_length, current_inside_length;
     double step_length, segment_length;
-    double noise_distance, last_noise_distance;
+    double min_step, max_step;
+    double noise_distance;
     Vector3 walker, step, segment_start;
     double render_precision;
 
@@ -61,8 +61,17 @@ static int _findSegments(BaseCloudsModel* model, SoftwareRenderer* renderer, Vec
 
     model->getAltitudeRange(&ymin, &ymax);
 
+    model->getDetailRange(&min_step, &max_step);
     render_precision = 15.2 - 1.5 * (double)renderer->render_quality;
-    render_precision = render_precision * layer->scaling / 50.0;
+    render_precision = render_precision * (ymax - ymin) / 50.0;
+    if (render_precision < min_step)
+    {
+        render_precision = min_step;
+    }
+    else if (render_precision > max_step)
+    {
+        render_precision = max_step;
+    }
     if (render_precision > max_total_length / 10.0)
     {
         render_precision = max_total_length / 10.0;
@@ -85,7 +94,6 @@ static int _findSegments(BaseCloudsModel* model, SoftwareRenderer* renderer, Vec
     {
         walker = walker.add(step);
         step_length = step.getNorm();
-        last_noise_distance = noise_distance;
         noise_distance = _getDistanceToBorder(model, walker) * render_precision;
         current_total_length += step_length;
 
@@ -143,9 +151,8 @@ static int _findSegments(BaseCloudsModel* model, SoftwareRenderer* renderer, Vec
 
 Color CloudBasicLayerRenderer::getColor(BaseCloudsModel *model, const Vector3 &eye, const Vector3 &location)
 {
-    CloudLayerDefinition* layer = model->getLayer();
     int i, segment_count;
-    double max_length, detail, total_length, inside_length;
+    double max_length, total_length, inside_length;
     Vector3 start, end, direction;
     Color result, col;
     CloudSegment segments[20];
@@ -162,10 +169,11 @@ Color CloudBasicLayerRenderer::getColor(BaseCloudsModel *model, const Vector3 &e
     direction = direction.normalize();
     result = COLOR_TRANSPARENT;
 
-    detail = parent->getPrecision(start) / layer->scaling;
-    double transparency_depth = layer->scaling * 1.5;
+    double ymin, ymax;
+    model->getAltitudeRange(&ymin, &ymax);
+    double transparency_depth = (ymax - ymin) * 0.3;
 
-    segment_count = _findSegments(model, parent, start, direction, detail, 20, transparency_depth, max_length, &inside_length, &total_length, segments);
+    segment_count = _findSegments(model, parent, start, direction, 20, transparency_depth, max_length, &inside_length, &total_length, segments);
     for (i = segment_count - 1; i >= 0; i--)
     {
         SurfaceMaterial material;
@@ -206,8 +214,10 @@ bool CloudBasicLayerRenderer::alterLight(BaseCloudsModel *model, LightComponent*
         return false;
     }
 
-    double light_traversal = model->getLayer()->scaling * 5.0;
-    _findSegments(model, parent, start, direction, 0.1, 20, light_traversal, end.sub(start).getNorm(), &inside_depth, &total_depth, segments);
+    double ymin, ymax;
+    model->getAltitudeRange(&ymin, &ymax);
+    double light_traversal = (ymax - ymin) * 0.8;
+    _findSegments(model, parent, start, direction, 20, light_traversal, end.sub(start).getNorm(), &inside_depth, &total_depth, segments);
 
     if (light_traversal < 0.0001)
     {

src/render/software/CloudsRenderer.cpp

@@ -104,11 +104,28 @@ BaseCloudsModel* CloudsRenderer::getLayerModel(unsigned int layer)
     }
     else
     {
-        qWarning("Asked for unknown layer renderer %d", layer);
+        qWarning("Asked for unknown layer model %d", layer);
         return fake_model;
     }
 }
 
+void CloudsRenderer::setLayerModel(unsigned int layer, BaseCloudsModel *model, bool delete_old)
+{
+    if (layer < layer_models.size())
+    {
+        if (delete_old)
+        {
+            delete layer_models[layer];
+        }
+        layer_models[layer] = model;
+    }
+    else
+    {
+        qWarning("Asked to set an unknown layer model %d", layer);
+        delete model;
+    }
+}
+
 Color CloudsRenderer::getColor(const Vector3 &eye, const Vector3 &location, const Color &base)
 {
     CloudsDefinition* definition = parent->getScenery()->getClouds();

src/render/software/CloudsRenderer.h

@@ -38,6 +38,14 @@ public:
      */
     virtual BaseCloudsModel* getLayerModel(unsigned int layer);
 
+    /*!
+     * \brief Override de default density model for a given layer.
+     *
+     * This must be called after each update().
+     * Ownership of the model is taken.
+     */
+    virtual void setLayerModel(unsigned int layer, BaseCloudsModel* model, bool delete_old=true);
+
     /*!
      * \brief Get the composited color, as applied on a base color and location.
      */

src/render/software/LightStatus.cpp

@@ -21,7 +21,7 @@ void LightStatus::pushComponent(LightComponent component)
 
 Color LightStatus::apply(const Vector3 &normal, const SurfaceMaterial &material)
 {
-    Color final;
+    Color final(0.0, 0.0, 0.0, 0.0);
 
     for (auto component: components)
     {

src/render/software/SoftwareRenderer.cpp

@@ -118,6 +118,36 @@ void SoftwareRenderer::disableClouds()
     scenery->getClouds()->clear();
 }
 
+void SoftwareRenderer::disableAtmosphere()
+{
+    LightComponent light;
+    std::vector<LightComponent> lights;
+
+    light.color.r = 1.5;
+    light.color.g = 1.5;
+    light.color.b = 1.5;
+    light.direction.x = -1.0;
+    light.direction.y = -0.5;
+    light.direction.z = 1.0;
+    light.direction = light.direction.normalize();
+    light.altered = 1;
+    light.reflection = 0.0;
+    lights.push_back(light);
+
+    light.color.r = 0.4;
+    light.color.g = 0.4;
+    light.color.b = 0.42;
+    light.direction.x = 1.0;
+    light.direction.y = -0.5;
+    light.direction.z = -1.0;
+    light.direction = light.direction.normalize();
+    light.altered = 0;
+    light.reflection = 0.0;
+    lights.push_back(light);
+
+    disableAtmosphere(lights);
+}
+
 void SoftwareRenderer::disableAtmosphere(const std::vector<LightComponent> &lights)
 {
     scenery->getAtmosphere()->model = AtmosphereDefinition::ATMOSPHERE_MODEL_DISABLED;

src/render/software/SoftwareRenderer.h

@@ -75,6 +75,7 @@ public:
      *
      * This function needs to be called after each prepare().
      */
+    void disableAtmosphere();
     void disableAtmosphere(const std::vector<LightComponent> &lights);
 
     void setPreviewCallbacks(RenderArea::RenderCallbackStart start, RenderArea::RenderCallbackDraw draw, RenderArea::RenderCallbackUpdate update);

src/render/software/clouds/BaseCloudsModel.cpp

@@ -23,8 +23,11 @@ void BaseCloudsModel::getAltitudeRange(double *min_altitude, double *max_altitud
 
 void BaseCloudsModel::getDetailRange(double *min_step, double *max_step) const
 {
-    *min_step = 0.1;
-    *max_step = 1.0;
+    double min_altitude, max_altitude, thickness;
+    getAltitudeRange(&min_altitude, &max_altitude);
+    thickness = max_altitude - min_altitude;
+    *min_step = thickness * 0.001;
+    *max_step = thickness * 0.05;
 }
 
 double BaseCloudsModel::getProbability(const Vector3 &, double) const

src/render/software/clouds/CloudModelStratoCumulus.cpp

@@ -37,15 +37,15 @@ void CloudModelStratoCumulus::update()
 
 void CloudModelStratoCumulus::getAltitudeRange(double *min_altitude, double *max_altitude) const
 {
-    *min_altitude = 2.0 + 7.0 * layer->altitude;
-    *max_altitude = *min_altitude + 5.0 * layer->scaling;
+    *min_altitude = 4.0 + 14.0 * layer->altitude;
+    *max_altitude = *min_altitude + 11.0 * layer->scaling;
 }
 
 double CloudModelStratoCumulus::getDensity(const Vector3 &location) const
 {
     double val;
     double min_altitude, max_altitude;
-    double noise_scaling = 12.0 * layer->scaling;
+    double noise_scaling = 25.0 * layer->scaling;
 
     getAltitudeRange(&min_altitude, &max_altitude);