Harald Johnson:

Changes
=======

- corrected some strange behavior when playing with the render dialog options
- the density slider is now working : if you are fps limited and still want to see clouds in
  the distance you should play with that
- added the choice for texture resolution, its more comprehensible now (before it was
  wrongly allways choosing 64x64 textures)
- changed the initial texture size : you now have 64 texture of 64x64, this uses 1Mo of
  texture memory (before it was 20 texture of  256x256, that took more memory and there was
  not enought impostors)
- sun vector is now right so the lighting is a bit better
- removed useless sort and light computations for impostors, this should save a lot of cpu
- blending of distant cloud is more accurate now
- clouds are now positioned correctly, they don't try to escape you anymore
- no more red/white boxes around cloud
- textures are now filtered (no more big pixels)

known bugs
==========

- distant objects are seen in front of clouds

simgear/environment/visual_enviro.cxx

@@ -26,12 +26,38 @@
 
 SGEnviro sgEnviro;
 
-SGEnviro::SGEnviro(void) {
+SGEnviro::SGEnviro(void) :
+	view_in_cloud(false),
+	precipitation_enable_state(false),
+	precipitation_density(100.0)
+
+{
 }
 
 SGEnviro::~SGEnviro(void) {
 }
 
+void SGEnviro::startOfFrame(void) {
+	view_in_cloud = false;
+	if(SGNewCloud::cldCache)
+		SGNewCloud::cldCache->startNewFrame();
+}
+
+void SGEnviro::endOfFrame(void) {
+}
+
+// this can be queried to add some turbulence for example
+bool SGEnviro::is_view_in_cloud(void) const {
+	return view_in_cloud;
+}
+void SGEnviro::set_view_in_cloud(bool incloud) {
+	view_in_cloud = incloud;
+}
+
+int SGEnviro::get_CacheResolution(void) const {
+	return SGCloudField::get_CacheResolution();
+}
+
 int SGEnviro::get_clouds_CacheSize(void) const {
 	return SGCloudField::get_CacheSize();
 }
@@ -45,6 +71,10 @@ bool SGEnviro::get_clouds_enable_state(void) const {
 	return SGCloudField::get_enable3dClouds();
 }
 
+void SGEnviro::set_CacheResolution(int resolutionPixels) {
+	SGCloudField::set_CacheResolution(resolutionPixels);
+}
+
 void SGEnviro::set_clouds_CacheSize(int sizeKb) {
 	SGCloudField::set_CacheSize(sizeKb);
 }
@@ -60,15 +90,17 @@ void SGEnviro::set_clouds_enable_state(bool enable) {
 
 // rain/snow
 float SGEnviro::get_precipitation_density(void) const {
-	return 0.0;
+	return precipitation_density;
 }
 bool SGEnviro::get_precipitation_enable_state(void) const {
-	return false;
+	return precipitation_enable_state;
 }
 
 void SGEnviro::set_precipitation_density(float density) {
+	precipitation_density = density;
 }
 void SGEnviro::set_precipitation_enable_state(bool enable) {
+	precipitation_enable_state = enable;
 }
 
 // others

simgear/environment/visual_enviro.hxx

@@ -24,18 +24,32 @@
 
 class SGEnviro {
 
+private:
+	bool view_in_cloud;
+	bool precipitation_enable_state;
+	float precipitation_density;
+
 public:
 	SGEnviro();
 	~SGEnviro();
 
+	void startOfFrame(void);
+	void endOfFrame(void);
+
+	// this can be queried to add some turbulence for example
+	bool is_view_in_cloud(void) const;
+	void set_view_in_cloud(bool incloud);
+
 	// Clouds
 	// return the size of the memory pool used by texture impostors
 	int get_clouds_CacheSize(void) const;
+	int get_CacheResolution(void) const;
 	float get_clouds_visibility(void) const;
 	float get_clouds_density(void) const;
 	bool get_clouds_enable_state(void) const;
 
 	void set_clouds_CacheSize(int sizeKb);
+	void set_CacheResolution(int resolutionPixels);
 	void set_clouds_visibility(float distance);
 	void set_clouds_density(float density);
 	void set_clouds_enable_state(bool enable);
@@ -54,5 +68,4 @@ public:
 
 extern SGEnviro sgEnviro;
 
-#endif // _VISUAL_ENVIRO_HXX
-
+#endif // _VISUAL_ENVIRO_HXX