[Examples] Started to replace static members in examples with local c…

…lass members.

The way Android apps load native .so libs causes static members to be initialized only once.
After the app is closed, even when the main entry point has exited, the next re-launch of the app
will retain the previous values of those static members because JNI does not necessarily re-load the shared library.
This makes the app partially look as if it never re-loaded.

examples/Cpp/PostProcessing/Example.cpp

@@ -81,6 +81,13 @@ class Example_PostProcessing : public ExampleBase
     }
     blurSettings;
 
+    struct Animation
+    {
+        Gs::Matrix4f    rotation;
+        float           innerModelRotation = 0.0f;
+    }
+    animation;
+
 public:
 
     Example_PostProcessing() :
@@ -428,17 +435,15 @@ class Example_PostProcessing : public ExampleBase
     void SetSceneSettingsOuterModel(float deltaPitch, float deltaYaw)
     {
         // Rotate model around X and Y axes
-        static Gs::Matrix4f rotation;
-
         Gs::Matrix4f deltaRotation;
         Gs::RotateFree(deltaRotation, { 1, 0, 0 }, deltaPitch);
         Gs::RotateFree(deltaRotation, { 0, 1, 0 }, deltaYaw);
-        rotation = deltaRotation * rotation;
+        animation.rotation = deltaRotation * animation.rotation;
 
         // Transform scene mesh
         sceneSettings.wMatrix.LoadIdentity();
         Gs::Translate(sceneSettings.wMatrix, { 0, 0, 5 });
-        sceneSettings.wMatrix *= rotation;
+        sceneSettings.wMatrix *= animation.rotation;
 
         // Set colors and matrix
         sceneSettings.diffuse       = { 0.6f, 0.6f, 0.6f, 1.0f };
@@ -484,8 +489,7 @@ class Example_PostProcessing : public ExampleBase
         #endif
 
         // Update rotation of inner model
-        static float innerModelRotation;
-        innerModelRotation += 0.01f;
+        animation.innerModelRotation += 0.01f;
 
         // Update rotation of outer model
         Gs::Vector2f mouseMotion
@@ -563,7 +567,7 @@ class Example_PostProcessing : public ExampleBase
                 commands->Draw(numSceneVertices, 0);
 
                 // Draw inner scene model
-                SetSceneSettingsInnerModel(innerModelRotation);
+                SetSceneSettingsInnerModel(animation.innerModelRotation);
                 commands->Draw(numSceneVertices, 0);
             }
             commands->EndRenderPass();

examples/Cpp/ShadowMapping/Scene.frag

@@ -2,13 +2,13 @@
 
 #version 140
 
-#ifdef GL_ES
+#if GL_ES
 precision mediump float;
 precision mediump sampler2DShadow;
 #endif
 
 // Specifies whether to enable Percentage-Closer-Filtering (PCF)
-//#define ENABLE_PCF
+#define ENABLE_PCF 0
 
 #define PFC_OFFSET 0.005
 
@@ -36,7 +36,7 @@ void main()
     shadowPos.xyz = shadowPos.xyz * vec3(0.5, -0.5, 0.5) + 0.5;
 
     // Sample shadow map
-    #ifdef ENABLE_PCF
+    #if ENABLE_PCF
     vec3[4] offsets = vec3[4](
         vec3(-PFC_OFFSET, -PFC_OFFSET, 0),
         vec3(-PFC_OFFSET, +PFC_OFFSET, 0),

examples/Cpp/ShadowMapping/Scene.vert

@@ -2,6 +2,10 @@
 
 #version 140
 
+#if GL_ES
+precision mediump float;
+#endif
+
 layout(std140) uniform Settings
 {
     mat4 wMatrix;

examples/Cpp/ShadowMapping/ShadowMap.vert

@@ -2,6 +2,10 @@
 
 #version 140
 
+#if GL_ES
+precision mediump float;
+#endif
+
 layout(std140) uniform Settings
 {
     mat4 wMatrix;