paysages : Added noise ridge factor.

git-svn-id: https://subversion.assembla.com/svn/thunderk/paysages@425 b1fd45b6-86a6-48da-8261-f70d1f35bdcc

gui_qt/dialognoise.cpp

@@ -8,6 +8,7 @@
 #include <QSlider>
 #include <QScrollArea>
 #include <QPushButton>
+#include <math.h>
 
 /**************** Previews ****************/
 class PreviewLevel:public BasePreview
@@ -34,13 +35,13 @@ protected:
     }
     QColor getColor(double x, double y)
     {
-        if ((_level >= 0) && (y > noiseGet1DLevel(_noise_preview, _level, x)))
+        if ((_level >= 0) && (-y > noiseGet1DLevel(_noise_preview, _level, x)))
         {
-            return QColor(255, 255, 255);
+            return Qt::black;
         }
         else
         {
-            return QColor(0, 0, 0);
+            return Qt::white;
         }
     }
 private:
@@ -66,13 +67,13 @@ protected:
     }
     QColor getColor(double x, double y)
     {
-        if (y > noiseGet1DTotal(_noise_preview, x))
+        if (-y > noiseGet1DTotal(_noise_preview, x))
         {
-            return QColor(255, 255, 255);
+            return Qt::black;
         }
         else
         {
-            return QColor(0, 0, 0);
+            return Qt::white;
         }
     }
 private:
@@ -84,6 +85,7 @@ private:
 DialogNoise::DialogNoise(QWidget *parent, NoiseGenerator* value):
     DialogWithPreview(parent)
 {
+    QWidget* function;
     QWidget* previews;
     QWidget* form;
     QWidget* buttons;
@@ -116,6 +118,23 @@ DialogNoise::DialogNoise(QWidget *parent, NoiseGenerator* value):
     form->setLayout(new QVBoxLayout());
     layout()->addWidget(form);
     
+    function = new QWidget(form);
+    function->setLayout(new QHBoxLayout());
+    form->layout()->addWidget(function);
+    
+    function->layout()->addWidget(new QLabel(tr("Noise function")));
+    function_algo = new QComboBox(function);
+    function_algo->addItems(QStringList(tr("Simplex")) << tr("Perlin") << tr("Naive"));
+    function->layout()->addWidget(function_algo);
+    function->layout()->addWidget(new QLabel(tr("Ridge factor")));
+    function_ridge = new QSlider(Qt::Horizontal, function);
+    function_ridge->setRange(-10, 10);
+    function_ridge->setTickInterval(10);
+    function_ridge->setTickPosition(QSlider::TicksBelow);
+    function->layout()->addWidget(function_ridge);
+    QObject::connect(function_algo, SIGNAL(currentIndexChanged(int)), this, SLOT(functionChanged()));
+    QObject::connect(function_ridge, SIGNAL(valueChanged(int)), this, SLOT(functionChanged()));
+
     form->layout()->addWidget(new QLabel(tr("Noise components")));
     levels = new QListWidget(form);
     form->layout()->addWidget(levels);
@@ -223,6 +242,7 @@ void DialogNoise::revertToCurrent()
 {
     int i, n;
     int selected;
+    NoiseFunction function;
     
     selected = levels->currentRow();
 
@@ -246,6 +266,10 @@ void DialogNoise::revertToCurrent()
         levels->setCurrentRow(selected);
     }
     
+    function = noiseGetFunction(_current);
+    function_algo->setCurrentIndex((int)function.algorithm);
+    function_ridge->setValue(round(function.ridge_factor * 20.0));
+
     previewLevel->redraw();
     previewTotal->redraw();
 }
@@ -283,6 +307,20 @@ void DialogNoise::removeLevel()
     levels->setCurrentRow(row);
 }
 
+void DialogNoise::functionChanged()
+{
+    NoiseFunction function;
+    
+    function.algorithm = (NoiseFunctionAlgorithm)function_algo->currentIndex();
+    function.ridge_factor = (double)function_ridge->value() * 0.05;
+    
+    noiseSetFunction(_current, &function);
+    noiseValidate(_current);
+    
+    previewLevel->redraw();
+    previewTotal->redraw();
+}
+
 void DialogNoise::levelChanged(int row)
 {
     if (noiseGetLevel(_current, row, &_current_level_params))

gui_qt/dialognoise.h

@@ -2,6 +2,7 @@
 #define _PAYSAGES_QT_DIALOGNOISE_H_
 
 #include <QListWidget>
+#include <QComboBox>
 #include "basepreview.h"
 #include "tools.h"
 
@@ -29,6 +30,7 @@ private:
 private slots:
     void addLevel();
     void removeLevel();
+    void functionChanged();
     void levelChanged(int row);
     void heightChanged(int value);
     void scalingChanged(int value);
@@ -40,6 +42,8 @@ private:
     NoiseLevel _current_level_params;
     BasePreview* previewLevel;
     BasePreview* previewTotal;
+    QComboBox* function_algo;
+    QSlider* function_ridge;
     QListWidget* levels;
     QSlider* slider_height;
     QSlider* slider_scaling;

gui_qt/formclouds.cpp

@@ -14,7 +14,7 @@ public:
     PreviewCloudsCoverage(QWidget* parent, CloudsLayerDefinition* layer):BasePreview(parent)
     {
         _renderer = rendererCreate();
-        _renderer.render_quality = 3;
+        _renderer.render_quality = 5;
         _renderer.applyLightStatus = _applyLightStatus;
         
         _original_layer = layer;
@@ -81,7 +81,7 @@ public:
         lightingValidateDefinition(&_lighting);
         
         _renderer = rendererCreate();
-        _renderer.render_quality = 3;
+        _renderer.render_quality = 8;
         _renderer.alterLight = _alterLight;
         _renderer.getLightStatus = _getLightStatus;
         _renderer.customData[0] = _preview_layer;
@@ -109,9 +109,9 @@ protected:
     void updateData()
     {
         cloudsLayerCopyDefinition(_original_layer, _preview_layer);
-        //noiseForceValue(_preview_layer.shape_noise, 1.0);
+        //noiseForceValue(_preview_layer->shape_noise, 1.0);
         _preview_layer->lower_altitude = -_preview_layer->thickness * 0.5;
-        //curveClear(_preview_layer.coverage_by_altitude);
+        //curveClear(_preview_layer->coverage_by_altitude);
         _preview_layer->base_coverage = 1.0;
         _preview_layer->_custom_coverage = _coverageFunc;
     }
@@ -172,8 +172,8 @@ FormClouds::FormClouds(QWidget *parent):
     addInputDouble(tr("Edge length"), &_layer->edge_length, 0.0, 1.0, 0.01, 0.1);
     addInputMaterial(tr("Material"), &_layer->material);
     addInputDouble(tr("Hardness to light"), &_layer->hardness, 0.0, 1.0, 0.01, 0.1);
-    addInputDouble(tr("Transparency depth"), &_layer->transparencydepth, 0.0, 100.0, 0.5, 5.0);
+    addInputDouble(tr("Transparency depth"), &_layer->transparencydepth, 0.0, 10.0, 0.1, 1.0);
-    addInputDouble(tr("Light traversal depth"), &_layer->lighttraversal, 0.0, 100.0, 0.5, 5.0);
+    addInputDouble(tr("Light traversal depth"), &_layer->lighttraversal, 0.0, 10.0, 0.1, 1.0);
     addInputDouble(tr("Minimum lighting"), &_layer->minimumlight, 0.0, 1.0, 0.01, 0.1);
 
     setLayers(_definition.layers);

gui_qt/inputnoise.cpp

@@ -31,10 +31,10 @@ public:
         for (int x = 0; x < width; x++)
         {
             factor = ((double)(height / 2)) / noiseGetMaxValue(noise);
-            value = noiseGet1DTotal(noise, ((double)x) / factor) * factor;
+            value = -noiseGet1DTotal(noise, ((double)x) / factor) * factor;
-            painter.setPen(QColor(255, 255, 255));
+            painter.setPen(Qt::white);
             painter.drawLine(x, 0, x, height / 2 + value);
-            painter.setPen(QColor(0, 0, 0));
+            painter.setPen(Qt::black);
             painter.drawLine(x, height / 2 + value + 1, x, height);
         }
     }

lib_paysages/auto.c

@@ -100,6 +100,7 @@ void autoGenRealisticLandscape(int seed)
     noiseClearLevels(water.waves_noise);
     noiseAddLevelsSimple(water.waves_noise, 2, 1.0, 1.0);
     noiseAddLevelsSimple(water.waves_noise, 3, 0.15, 0.1);
+    noiseSetFunctionParams(water.waves_noise, NOISE_FUNCTION_SIMPLEX, -0.3);
     scenerySetWater(&water);
     waterDeleteDefinition(&water);
 
@@ -137,8 +138,9 @@ void autoGenRealisticLandscape(int seed)
     terrain = terrainCreateDefinition();
     noiseClearLevels(terrain.height_noise);
     noiseAddLevelsSimple(terrain.height_noise, 10, 1.0, 1.0);
+    noiseSetFunctionParams(terrain.height_noise, NOISE_FUNCTION_SIMPLEX, -0.2);
     terrain.height_factor = 12.0 / noiseGetMaxValue(terrain.height_noise);
-    terrain.scaling = 60.0;
+    terrain.scaling = 80.0;
     terrain.shadow_smoothing = 0.03;
     scenerySetTerrain(&terrain);
     terrainDeleteDefinition(&terrain);

lib_paysages/clouds.c

@@ -89,13 +89,15 @@ CloudsLayerDefinition* cloudsLayerCreateDefinition()
     result->lighttraversal = 7.0;
     result->minimumlight = 0.4;
     result->shape_scaling = 10.0;
-    result->edge_scaling = 0.2;
+    result->edge_scaling = 0.3;
-    result->edge_length = 0.2;
+    result->edge_length = 0.4;
     result->base_coverage = 0.35;
     result->shape_noise = noiseCreateGenerator();
-    noiseAddLevelsSimple(result->shape_noise, 5, 1.0, 1.0);
+    noiseAddLevelsSimple(result->shape_noise, 6, 1.0, 1.0);
+    noiseSetFunctionParams(result->shape_noise, NOISE_FUNCTION_SIMPLEX, 0.3);
     result->edge_noise = noiseCreateGenerator();
     noiseAddLevelsSimple(result->edge_noise, 8, 1.0, 1.0);
+    noiseSetFunctionParams(result->edge_noise, NOISE_FUNCTION_SIMPLEX, 0.5);
     
     result->_custom_coverage = _standardCoverageFunc;
 

lib_paysages/noise.c

@@ -13,11 +13,15 @@ struct NoiseLevel;
 
 struct NoiseGenerator
 {
+    NoiseFunction function;
     double height_offset;
     int level_count;
     struct NoiseLevel levels[MAX_LEVEL_COUNT];
     
     double _max_height;
+    double (*_func_noise_1d)(double x);
+    double (*_func_noise_2d)(double x, double y);
+    double (*_func_noise_3d)(double x, double y, double z);
 };
 
 void noiseInit()
@@ -45,6 +49,8 @@ NoiseGenerator* noiseCreateGenerator()
 
     /* initialize */
     result = malloc(sizeof(NoiseGenerator));
+    result->function.algorithm = NOISE_FUNCTION_SIMPLEX;
+    result->function.ridge_factor = 0.0;
     result->level_count = 0;
     result->height_offset = 0.0;
 
@@ -62,6 +68,10 @@ void noiseSaveGenerator(PackStream* stream, NoiseGenerator* generator)
 {
     int x;
 
+    x = (int)generator->function.algorithm;
+    packWriteInt(stream, &x);
+    packWriteDouble(stream, &generator->function.ridge_factor);
+    
     packWriteDouble(stream, &generator->height_offset);
     packWriteInt(stream, &generator->level_count);
 
@@ -81,6 +91,10 @@ void noiseLoadGenerator(PackStream* stream, NoiseGenerator* generator)
 {
     int x;
 
+    packReadInt(stream, &x);
+    generator->function.algorithm = (NoiseFunctionAlgorithm)x;
+    packReadDouble(stream, &generator->function.ridge_factor);
+
     packReadDouble(stream, &generator->height_offset);
     packReadInt(stream, &generator->level_count);
 
@@ -100,6 +114,7 @@ void noiseLoadGenerator(PackStream* stream, NoiseGenerator* generator)
 
 void noiseCopy(NoiseGenerator* source, NoiseGenerator* destination)
 {
+    destination->function = source->function;
     destination->height_offset = source->height_offset;
     destination->level_count = source->level_count;
 
@@ -113,6 +128,34 @@ void noiseValidate(NoiseGenerator* generator)
     int x;
     double max_height = generator->height_offset;
     
+    if (generator->function.algorithm < 0 || generator->function.algorithm > NOISE_FUNCTION_NAIVE)
+    {
+        generator->function.algorithm = NOISE_FUNCTION_SIMPLEX;
+    }
+    switch (generator->function.algorithm)
+    {
+    case NOISE_FUNCTION_SIMPLEX:
+        generator->_func_noise_1d = noiseSimplexGet1DValue;
+        generator->_func_noise_2d = noiseSimplexGet2DValue;
+        generator->_func_noise_3d = noiseSimplexGet3DValue;
+        break;
+    case NOISE_FUNCTION_PERLIN:
+        /*TODO*/
+        break;
+    case NOISE_FUNCTION_NAIVE:
+        /* TODO */
+        break;
+    }
+    
+    if (generator->function.ridge_factor > 0.5)
+    {
+        generator->function.ridge_factor = 0.5;
+    }
+    if (generator->function.ridge_factor < -0.5)
+    {
+        generator->function.ridge_factor = -0.5;
+    }
+
     for (x = 0; x < generator->level_count; x++)
     {
         max_height += generator->levels[x].height / 2.0;
@@ -121,6 +164,23 @@ void noiseValidate(NoiseGenerator* generator)
     generator->_max_height = max_height;
 }
 
+NoiseFunction noiseGetFunction(NoiseGenerator* generator)
+{
+    return generator->function;
+}
+
+void noiseSetFunction(NoiseGenerator* generator, NoiseFunction* function)
+{
+    generator->function = *function;
+    noiseValidate(generator);
+}
+
+void noiseSetFunctionParams(NoiseGenerator* generator, NoiseFunctionAlgorithm algorithm, double ridge_factor)
+{
+    NoiseFunction function = {algorithm, ridge_factor};
+    noiseSetFunction(generator, &function);
+}
+
 void noiseForceValue(NoiseGenerator* generator, double value)
 {
     noiseClearLevels(generator);
@@ -269,17 +329,28 @@ void noiseNormalizeHeight(NoiseGenerator* generator, double min_height, double m
     noiseValidate(generator);
 }
 
-
+static inline double _applyRidge(double value, double ridge)
-
-
-static inline double _get1DRawNoiseValue(NoiseGenerator* generator, double x)
 {
-    return noiseSimplexGet2DValue(x, 0.0) * 0.5;
+    if (ridge > 0.0)
+    {
+        return fabs(value + 0.5 - ridge) - 0.5 + ridge;
     }
+    else if (ridge < 0.0)
+    {
+        return -fabs(value - 0.5 - ridge) + 0.5 + ridge;
+    }
+    else
+    {
+        return value;
+    }
+}
+
+
+
 
 static inline double _get1DLevelValue(NoiseGenerator* generator, NoiseLevel* level, double x)
 {
-    return _get1DRawNoiseValue(generator, x / level->scaling + level->xoffset) * level->height;
+    return _applyRidge(generator->_func_noise_1d(x / level->scaling + level->xoffset) * level->height, generator->function.ridge_factor);
 }
 
 double noiseGet1DLevel(NoiseGenerator* generator, int level, double x)
@@ -334,14 +405,9 @@ double noiseGet1DDetail(NoiseGenerator* generator, double x, double detail)
 
 
 
-static inline double _get2DRawNoiseValue(NoiseGenerator* generator, double x, double y)
-{
-    return noiseSimplexGet2DValue(x, y) * 0.5;
-}
-
 static inline double _get2DLevelValue(NoiseGenerator* generator, NoiseLevel* level, double x, double y)
 {
-    return _get2DRawNoiseValue(generator, x / level->scaling + level->xoffset, y / level->scaling + level->yoffset) * level->height;
+    return _applyRidge(generator->_func_noise_2d(x / level->scaling + level->xoffset, y / level->scaling + level->yoffset) * level->height, generator->function.ridge_factor);
 }
 
 double noiseGet2DLevel(NoiseGenerator* generator, int level, double x, double y)
@@ -396,14 +462,9 @@ double noiseGet2DDetail(NoiseGenerator* generator, double x, double y, double de
 
 
 
-static inline double _get3DRawNoiseValue(NoiseGenerator* generator, double x, double y, double z)
-{
-    return noiseSimplexGet3DValue(x, y, z) * 0.5;
-}
-
 static inline double _get3DLevelValue(NoiseGenerator* generator, NoiseLevel* level, double x, double y, double z)
 {
-    return _get3DRawNoiseValue(generator, x / level->scaling + level->xoffset, y / level->scaling + level->yoffset, z / level->scaling + level->zoffset) * level->height;
+    return _applyRidge(generator->_func_noise_3d(x / level->scaling + level->xoffset, y / level->scaling + level->yoffset, z / level->scaling + level->zoffset) * level->height, generator->function.ridge_factor);
 }
 
 double noiseGet3DLevel(NoiseGenerator* generator, int level, double x, double y, double z)

lib_paysages/noise.h

@@ -7,6 +7,19 @@
 extern "C" {
 #endif
 
+typedef enum
+{
+    NOISE_FUNCTION_SIMPLEX,
+    NOISE_FUNCTION_PERLIN,
+    NOISE_FUNCTION_NAIVE
+} NoiseFunctionAlgorithm;
+
+typedef struct
+{
+    NoiseFunctionAlgorithm algorithm;
+    double ridge_factor;
+} NoiseFunction;
+    
 struct NoiseLevel
 {
     double scaling;
@@ -29,6 +42,9 @@ void noiseSaveGenerator(PackStream* stream, NoiseGenerator* generator);
 void noiseLoadGenerator(PackStream* stream, NoiseGenerator* generator);
 void noiseCopy(NoiseGenerator* source, NoiseGenerator* destination);
 void noiseValidate(NoiseGenerator* generator);
+NoiseFunction noiseGetFunction(NoiseGenerator* generator);
+void noiseSetFunction(NoiseGenerator* generator, NoiseFunction* function);
+void noiseSetFunctionParams(NoiseGenerator* generator, NoiseFunctionAlgorithm algorithm, double ridge_factor);
 void noiseForceValue(NoiseGenerator* generator, double value);
 double noiseGetMaxValue(NoiseGenerator* generator);
 int noiseGetLevelCount(NoiseGenerator* generator);

lib_paysages/noisesimplex.c

@@ -139,6 +139,12 @@ void noiseSimplexInit()
     _G4 = (5.0 - sqrt(5.0)) / 20.0;
 }
 
+double noiseSimplexGet1DValue(double xin)
+{
+    /* TODO Find custom function */
+    return noiseSimplexGet2DValue(xin, 0.0);
+}
+
 double noiseSimplexGet2DValue(double xin, double yin)
 {
     double n0, n1, n2; /* Noise contributions from the three corners */
@@ -200,8 +206,8 @@ double noiseSimplexGet2DValue(double xin, double yin)
         n2 = t2 * t2 * _dot2(_grad3[gi2], x2, y2);
     }
     /* Add contributions from each corner to get the final noise value.
-       The result is scaled to return values in the interval [-1,1]. */
+       The result is scaled to return values in the interval [-0.5,0.5]. */
-    return 70.0 * (n0 + n1 + n2);
+    return 35.0 * (n0 + n1 + n2);
 }
 
 double noiseSimplexGet3DValue(double xin, double yin, double zin)
@@ -334,8 +340,8 @@ double noiseSimplexGet3DValue(double xin, double yin, double zin)
         n3 = t3 * t3 * _dot3(_grad3[gi3], x3, y3, z3);
     }
     /* Add contributions from each corner to get the final noise value.
-       The result is scaled to stay just inside [-1,1] */
+       The result is scaled to stay just inside [-0.5,0.5] */
-    return 32.0 * (n0 + n1 + n2 + n3);
+    return 16.0 * (n0 + n1 + n2 + n3);
 }
 
 double noiseSimplexGet4DValue(double x, double y, double z, double w)
@@ -462,6 +468,6 @@ double noiseSimplexGet4DValue(double x, double y, double z, double w)
         t4 *= t4;
         n4 = t4 * t4 * _dot4(_grad4[gi4], x4, y4, z4, w4);
     }
-    /* Sum up and scale the result to cover the range [-1,1] */
+    /* Sum up and scale the result to cover the range [-0.5,0.5] */
-    return 27.0 * (n0 + n1 + n2 + n3 + n4);
+    return 13.5 * (n0 + n1 + n2 + n3 + n4);
 }

lib_paysages/noisesimplex.h

@@ -6,6 +6,7 @@ extern "C" {
 #endif
 
 void noiseSimplexInit();
+double noiseSimplexGet1DValue(double xin);
 double noiseSimplexGet2DValue(double xin, double yin);
 double noiseSimplexGet3DValue(double xin, double yin, double zin);
 double noiseSimplexGet4DValue(double x, double y, double z, double w);