Added new physics functions

* Added some new physics functions
* Added new documentation
* Added some auto checks for OS to rc_os_defines.h
* Fixed bugs on settting and getting position of sprites

rcbasic_runtime/rc_os_defines.h

@@ -1,12 +1,27 @@
 #ifndef RC_OS_DEFINES_H_INCLUDED
 #define RC_OS_DEFINES_H_INCLUDED
 
-#define RC_LINUX
-//#define RC_WEB
-//#define RC_WINDOWS
-//#define RC_ANDROID
-//#define RC_MAC
-//#define RC_IOS
+//USED FOR TESTING ONLY
+//#define RC_TESTING
+
+//I am checking Android first since I think it also defines __linux__
+
+#if defined(__ANDROID__)
+	#define RC_ANDROID
+#elif defined(__linux__)
+	#define RC_LINUX
+#elif __EMSCRIPTEN__
+	#define RC_WEB
+#elif defined(_WIN32) || defined(_WIN64)
+	#define RC_WINDOWS
+#elif defined(__APPLE__) && defined(__MACH__) // Apple OSX and iOS (Darwin)
+	 #include <TargetConditionals.h>
+    #if defined(TARGET_IPHONE_SIMULATOR) || defined(TARGET_OS_IPHONE)
+		#define RC_IOS
+    #else
+		#define RC_MAC
+	#endif // TARGET_IPHONE_SIMULATOR
+#endif // defined
 
 #ifdef RC_WEB
 #define RC_LINUX
@@ -20,10 +35,13 @@
 
 #ifdef RC_IOS
 #define RC_MOBILE
+#define RC_DRIVER_GLES2
 #endif
 
-//FOR DEBUG PURPOSES
+//FOR TESTING PURPOSES
+#ifdef RC_TESTING
 //#define RC_DRIVER_GLES2
+#endif // RC_TESTING
 
 #define RC_PI 3.14159265359