Simplify Oculus example...

...to align it with standard raylib code. Final goal would be having the
same code work for every platform with no changes...

examples/core_oculus_rift.c

@@ -52,14 +52,9 @@ int main()
             ClearBackground(RAYWHITE);
             
             Begin3dMode(camera);
-            //BeginOculusDrawing(camera);   // Add it to Begin3dMode() ?
 
             for (int eye = 0; eye < 2; eye++)
             {
-                // TODO: Probably projection and view matrices could be created here...
-                // ...without the need to create it internally through Begin3dMode()
-                //Begin3dMode(camera);
-            
                 SetOculusView(eye);
                 
                 DrawCube(cubePosition, 2.0f, 2.0f, 2.0f, RED);
@@ -67,15 +62,10 @@ int main()
                 
                 DrawGrid(10, 1.0f);
                 
-                // TODO: Call internal buffers drawing directly (rlglDraw()) and...
-                // ...reset internal matrices, instead of letting End3dMode() do that
-                //End3dMode();
-                
                 DrawDefaultBuffers();   // Process internal dynamic buffers
             }
             
             End3dMode();
-            //EndOculusDrawing();   // Add it to End3dMode() ?
 
         EndDrawing();
         //----------------------------------------------------------------------------------

src/core.c

@@ -607,13 +607,14 @@ void Begin3dMode(Camera camera)
     
     rlEnableDepthTest();                // Enable DEPTH_TEST for 3D
     
-    //if (vrEnabled) BeginVrMode();
+    if (VrEnabled()) BeginOculusDrawing();
 }
 
 // Ends 3D mode and returns to default 2D orthographic mode
 void End3dMode(void)
 {
-    rlglDraw();                         // Draw Buffers (Only OpenGL 3+ and ES2)
+    if (VrEnabled()) EndOculusDrawing();
+    else rlglDraw();                         // Draw Buffers (Only OpenGL 3+ and ES2)
 
     rlMatrixMode(RL_PROJECTION);        // Switch to projection matrix
     rlPopMatrix();                      // Restore previous matrix (PROJECTION) from matrix stack

src/rlgl.c

@@ -76,7 +76,7 @@
     #include "standard_shader.h"    // Standard shader to embed
 #endif
 
-#define RLGL_OCULUS_SUPPORT       // Enable Oculus Rift code
+//#define RLGL_OCULUS_SUPPORT       // Enable Oculus Rift code
 #if defined(RLGL_OCULUS_SUPPORT)
     #include "external/OculusSDK/LibOVR/Include/OVR_CAPI_GL.h"    // Oculus SDK for OpenGL
 #endif
@@ -268,6 +268,7 @@ static unsigned int frameIndex = 0;     // Oculus frames counter, used to discar
 #endif
 
 static bool vrSimulator = false;        // VR simulator (stereo rendering on window, without vr device)
+static bool vrEnabled = false;          // VR enabled flag (required by core module)
 
 // Compressed textures support flags
 static bool texCompDXTSupported = false;    // DDS texture compression support
@@ -2523,6 +2524,7 @@ void InitOculusDevice(void)
     }
 #else
     vrSimulator = true;
+    vrEnabled = true;
 #endif
 
     if (vrSimulator)
@@ -2548,6 +2550,14 @@ void CloseOculusDevice(void)
         // TODO: Unload stereo framebuffer and texture
         // TODO: Unload oculus-distortion shader
     }
+    
+    vrEnabled = false;
+}
+
+// Track stereoscopic rendering
+bool VrEnabled(void)
+{
+    return vrEnabled;
 }
 
 // Update Oculus Rift tracking (position and orientation)

src/rlgl.h

@@ -362,6 +362,7 @@ void UpdateOculusTracking(void);            // Update Oculus Rift tracking (posi
 void SetOculusView(int eye);                // Set internal projection and modelview matrix depending on eyes tracking data
 void BeginOculusDrawing(void);              // Begin Oculus drawing configuration
 void EndOculusDrawing(void);                // End Oculus drawing process (and desktop mirror)
+bool VrEnabled(void);                       // Track stereoscopic rendering
 
 #ifdef __cplusplus
 }