paysages: Fog has been refactored in an 'atmosphere' module.

git-svn-id: https://subversion.assembla.com/svn/thunderk/paysages@235 b1fd45b6-86a6-48da-8261-f70d1f35bdcc

TODO

@@ -1,6 +1,6 @@
 - Refactor fog in a new 'atmosphere' module.
+- Make multi-lights work, to restore lighting from skydome.
 - In GUI, revertConfig should lock the previews while reverting.
 - All Save and Load methods should have same signature : void ...Save(FILE*, ...*)
 - All noises should use the same entropy pool (saved separately), and avoid reallocs.
 - Remove all global variables (render_quality, render_width...), it should all be set in Renderer.
-- Make multi-lights work, to restore lighting from skydome.

lib_paysages/atmosphere.c

@@ -0,0 +1,100 @@
+#include "atmosphere.h"
+#include "shared/functions.h"
+#include "shared/constants.h"
+#include "scenery.h"
+
+void atmosphereInit()
+{
+}
+
+void atmosphereSave(FILE* f, AtmosphereDefinition* definition)
+{
+    toolsSaveDouble(f, definition->distance_near);
+    toolsSaveDouble(f, definition->distance_far);
+    toolsSaveDouble(f, definition->full_mask);
+    toolsSaveInt(f, definition->auto_lock_on_haze);
+    colorSave(definition->color, f);
+}
+
+void atmosphereLoad(FILE* f, AtmosphereDefinition* definition)
+{
+    definition->distance_near = toolsLoadDouble(f);
+    definition->distance_far = toolsLoadDouble(f);
+    definition->full_mask = toolsLoadDouble(f);
+    definition->auto_lock_on_haze = toolsLoadInt(f);
+    definition->color = colorLoad(f);
+
+    atmosphereValidateDefinition(definition);
+}
+
+AtmosphereDefinition atmosphereCreateDefinition()
+{
+    AtmosphereDefinition definition;
+
+    definition.distance_near = 0.0;
+    definition.distance_far = 1.0;
+    definition.full_mask = 0.0;
+    definition.auto_lock_on_haze = 0;
+    definition.color = COLOR_BLACK;
+
+    atmosphereValidateDefinition(&definition);
+
+    return definition;
+}
+
+void atmosphereDeleteDefinition(AtmosphereDefinition* definition)
+{
+}
+
+void atmosphereCopyDefinition(AtmosphereDefinition* source, AtmosphereDefinition* destination)
+{
+    *destination = *source;
+}
+
+void atmosphereValidateDefinition(AtmosphereDefinition* definition)
+{
+    SkyDefinition sky;
+
+    if (definition->distance_far <= definition->distance_near)
+    {
+        definition->distance_far = definition->distance_near + 1.0;
+    }
+    if (definition->full_mask < 0.0)
+    {
+        definition->full_mask = 0.0;
+    }
+    if (definition->full_mask > 1.0)
+    {
+        definition->full_mask = 1.0;
+    }
+    if (definition->auto_lock_on_haze)
+    {
+        sky = skyCreateDefinition();
+        sceneryGetSky(&sky);
+        definition->color = colorGradationGet(&sky.haze_color, sky.daytime);
+        skyDeleteDefinition(&sky);
+    }
+}
+
+Color atmosphereApply(AtmosphereDefinition* definition, Renderer* renderer, Vector3 location, Color base)
+{
+    Color mask = definition->color;
+    double distance = v3Norm(v3Sub(renderer->camera_location, location));
+    double value;
+
+    if (distance < definition->distance_near)
+    {
+        return base;
+    }
+    else if (distance > definition->distance_far)
+    {
+        distance = definition->distance_far;
+    }
+
+    value = definition->full_mask * (distance - definition->distance_near) / (definition->distance_far - definition->distance_near);
+    mask.a = value;
+
+    colorMask(&base, &mask);
+
+    return base;
+}

lib_paysages/atmosphere.h

@@ -0,0 +1,36 @@
+#ifndef _PAYSAGES_ATMOSPHERE_H_
+#define _PAYSAGES_ATMOSPHERE_H_
+
+#include "shared/types.h"
+#include "lighting.h"
+#include <stdio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct
+{
+    double distance_near;
+    double distance_far;
+    double full_mask;
+    int auto_lock_on_haze;
+    Color color;
+} AtmosphereDefinition;
+
+void atmosphereInit();
+void atmosphereSave(FILE* f, AtmosphereDefinition* definition);
+void atmosphereLoad(FILE* f, AtmosphereDefinition* definition);
+
+AtmosphereDefinition atmosphereCreateDefinition();
+void atmosphereDeleteDefinition(AtmosphereDefinition* definition);
+void atmosphereCopyDefinition(AtmosphereDefinition* source, AtmosphereDefinition* destination);
+void atmosphereValidateDefinition(AtmosphereDefinition* definition);
+
+Color atmosphereApply(AtmosphereDefinition* definition, Renderer* renderer, Vector3 location, Color base);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

lib_paysages/auto.c

@@ -57,12 +57,11 @@ void autoSetDaytimeFraction(double daytime)
     sky.daytime = daytime;
     scenerySetSky(&sky);
     skyDeleteDefinition(&sky);
-
-    fogSetColor(colorGradationGet(&sky.haze_color, daytime));
 }
 
 void autoGenRealisticLandscape(int seed)
 {
+    AtmosphereDefinition atmosphere;
     TerrainDefinition terrain;
     WaterDefinition water;
     CloudsDefinition clouds;
@@ -217,8 +216,14 @@ void autoGenRealisticLandscape(int seed)
     scenerySetTextures(&textures);
     texturesDeleteDefinition(&textures);
 
-    /* Fog */
-    fogSetDistance(20.0, 100.0);
+    /* Atmosphere */
+    atmosphere = atmosphereCreateDefinition();
+    atmosphere.distance_near = 20.0;
+    atmosphere.distance_far = 100.0;
+    atmosphere.full_mask = 0.6;
+    atmosphere.auto_lock_on_haze = 1;
+    scenerySetAtmosphere(&atmosphere);
+    atmosphereDeleteDefinition(&atmosphere);
 }
 
 void* _renderFirstPass(void* data)

lib_paysages/clouds.c

@@ -454,6 +454,9 @@ Color cloudsGetLayerColor(CloudsLayerDefinition* definition, Renderer* renderer,
         col.a = (segments[i].length >= 50.0) ? 1.0 : (segments[i].length / 50.0);
         colorMask(&result, &col);
     }
+
+    result = renderer->applyAtmosphere(renderer, start, result);
+
     return result;
 }
 

lib_paysages/fog.c

@@ -1,51 +0,0 @@
-#include "shared/types.h"
-#include "shared/functions.h"
-#include "shared/globals.h"
-#include "shared/constants.h"
-
-static double _near = 0.0, _far = 1.0;
-static Color _col = {0.0, 0.0, 0.0, 0.0};
-
-void fogSave(FILE* f)
-{
-}
-
-void fogLoad(FILE* f)
-{
-}
-
-void fogSetColor(Color col)
-{
-    _col = col;
-}
-
-void fogSetDistance(double near, double far)
-{
-    _near = near;
-    _far = far;
-}
-
-Color fogApplyToLocation(Vector3 location, Color base)
-{
-    return base;
-    // TODO Don't use camera_location
-    /*Color mask = _col;
-    double distance = v3Norm(v3Sub(camera_location, location));
-    double value;
-
-    if (distance < _near)
-    {
-        return base;
-    }
-    else if (distance > _far)
-    {
-        distance = _far;
-    }
-
-    value = 0.8 * (distance - _near) / (_far - _near);
-
-    mask.a *= value;
-    colorMask(&base, &mask);
-    return base;*/
-}
-

lib_paysages/scenery.c

@@ -5,6 +5,7 @@
 #include "system.h"
 #include "render.h"
 
+AtmosphereDefinition _atmosphere;
 CameraDefinition _camera;
 CloudsDefinition _clouds;
 LightingDefinition _lighting;
@@ -15,6 +16,7 @@ WaterDefinition _water;
 
 void sceneryInit()
 {
+    atmosphereInit();
     cameraInit();
     cloudsInit();
     lightingInit();
@@ -23,6 +25,7 @@ void sceneryInit()
     texturesInit();
     waterInit();
 
+    _atmosphere = atmosphereCreateDefinition();
     _camera = cameraCreateDefinition();
     _clouds = cloudsCreateDefinition();
     _lighting = lightingCreateDefinition();
@@ -36,6 +39,7 @@ void scenerySaveToFile(char* filepath)
 {
     FILE* f = fopen(filepath, "wb");
 
+    atmosphereSave(f, &_atmosphere);
     cameraSave(f, &_camera);
     cloudsSave(f, &_clouds);
     lightingSave(f, &_lighting);
@@ -53,6 +57,9 @@ void sceneryLoadFromFile(char* filepath)
 
     /* TODO Use intermediary definitions ? */
 
+    atmosphereLoad(f, &_atmosphere);
+    atmosphereValidateDefinition(&_atmosphere);
+
     cameraLoad(f, &_camera);
     cameraValidateDefinition(&_camera);
 
@@ -77,6 +84,17 @@ void sceneryLoadFromFile(char* filepath)
     fclose(f);
 }
 
+void scenerySetAtmosphere(AtmosphereDefinition* atmosphere)
+{
+    atmosphereCopyDefinition(atmosphere, &_atmosphere);
+    atmosphereValidateDefinition(&_atmosphere);
+}
+
+void sceneryGetAtmosphere(AtmosphereDefinition* atmosphere)
+{
+    atmosphereCopyDefinition(&_atmosphere, atmosphere);
+}
+
 void scenerySetCamera(CameraDefinition* camera)
 {
     cameraCopyDefinition(camera, &_camera);
@@ -115,6 +133,7 @@ void scenerySetSky(SkyDefinition* sky)
     skyCopyDefinition(sky, &_sky);
     skyValidateDefinition(&_sky);
 
+    atmosphereValidateDefinition(&_atmosphere);
     lightingValidateDefinition(&_lighting);
 }
 
@@ -230,7 +249,7 @@ static Color _applyTextures(Renderer* renderer, Vector3 location, double precisi
 
 static Color _applyAtmosphere(Renderer* renderer, Vector3 location, Color base)
 {
-    return fogApplyToLocation(location, base);
+    return atmosphereApply(&_atmosphere, renderer, location, base);
 }
 
 static Color _applyClouds(Renderer* renderer, Color base, Vector3 start, Vector3 end)
@@ -268,6 +287,9 @@ Renderer sceneryGetStandardRenderer(int quality)
 {
     Renderer result;
 
+    quality = (quality > 10) ? 10 : quality;
+    quality = (quality < 1) ? 1 : quality;
+
     result.camera_location = _camera.location;
     result.render_quality = quality;
 

lib_paysages/scenery.h

@@ -8,6 +8,7 @@
  * a standard renderer.
  */
 
+#include "atmosphere.h"
 #include "camera.h"
 #include "clouds.h"
 #include "lighting.h"
@@ -26,6 +27,9 @@ void sceneryInit();
 void scenerySaveToFile(char* filepath);
 void sceneryLoadFromFile(char* filepath);
 
+void scenerySetAtmosphere(AtmosphereDefinition* atmosphere);
+void sceneryGetAtmosphere(AtmosphereDefinition* atmosphere);
+
 void scenerySetCamera(CameraDefinition* camera);
 void sceneryGetCamera(CameraDefinition* camera);
 

lib_paysages/shared/functions.h

@@ -70,13 +70,6 @@ Matrix4 m4NewPerspective(double fov_y, double aspect, double near, double far);
 double m4Determinant(Matrix4 m);
 Matrix4 m4Inverse(Matrix4 m);
 
-/* fog.c */
-void fogSave(FILE* f);
-void fogLoad(FILE* f);
-void fogSetColor(Color col);
-void fogSetDistance(double near, double far);
-Color fogApplyToLocation(Vector3 location, Color base);
-
 /* tools.c */
 double toolsRandom();
 double toolsBicubicInterpolate(double stencil[16], double x, double y);

lib_paysages/sky.c

@@ -1,3 +1,5 @@
+#include "sky.h"
+
 #include <stdlib.h>
 #include <math.h>
 
@@ -7,7 +9,6 @@
 #include "shared/constants.h"
 #include "render.h"
 #include "clouds.h"
-#include "sky.h"
 #include "lighting.h"
 
 #define SPHERE_SIZE 1000.0