From b3f75b91ff6859f5c19c4b1e6b17c78b5e66530f Mon Sep 17 00:00:00 2001
From: Ray <raysan5@gmail.com>
Date: Tue, 6 Apr 2021 23:23:03 +0200
Subject: [PATCH] REDESIGNED: Vr stereo mode

---
 examples/core/core_vr_simulator.c | 19 +++++++++++--------
 src/core.c                        | 19 +------------------
 src/raylib.h                      |  2 +-
 3 files changed, 13 insertions(+), 27 deletions(-)

diff --git a/examples/core/core_vr_simulator.c b/examples/core/core_vr_simulator.c
index ff303ae2d..091b2fc90 100644
--- a/examples/core/core_vr_simulator.c
+++ b/examples/core/core_vr_simulator.c
@@ -101,19 +101,22 @@ int main(void)
 
             ClearBackground(RAYWHITE);
 
-            BeginVrStereoMode(target, config);
-                BeginMode3D(camera);
+            BeginTextureMode(target);
+                ClearBackground(RAYWHITE);
+                BeginVrStereoMode(config);
+                    BeginMode3D(camera);
 
-                    DrawCube(cubePosition, 2.0f, 2.0f, 2.0f, RED);
-                    DrawCubeWires(cubePosition, 2.0f, 2.0f, 2.0f, MAROON);
+                        DrawCube(cubePosition, 2.0f, 2.0f, 2.0f, RED);
+                        DrawCubeWires(cubePosition, 2.0f, 2.0f, 2.0f, MAROON);
 
-                    DrawGrid(40, 1.0f);
+                        DrawGrid(40, 1.0f);
 
-                EndMode3D();
-            EndVrStereoMode();
+                    EndMode3D();
+                EndVrStereoMode();
+            EndTextureMode();
             
             BeginShaderMode(distortion);
-                DrawTextureRec(target.texture, (Rectangle){ 0, 0, (float)target.texture.width, (float)-target.texture.height }, (Vector2){ 0.0f, 0.0f }, WHITE);
+               DrawTextureRec(target.texture, (Rectangle){ 0, 0, (float)target.texture.width, (float)-target.texture.height }, (Vector2){ 0.0f, 0.0f }, WHITE);
             EndShaderMode();
 
             DrawFPS(10, 10);
diff --git a/src/core.c b/src/core.c
index fd77bb85a..2cce9f429 100644
--- a/src/core.c
+++ b/src/core.c
@@ -2067,36 +2067,19 @@ void EndScissorMode(void)
 }
 
 // Begin VR drawing configuration
-void BeginVrStereoMode(RenderTexture2D target, VrStereoConfig config)
+void BeginVrStereoMode(VrStereoConfig config)
 {
-#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
-    rlEnableFramebuffer(target.id);     // Setup framebuffer for stereo rendering
-    //glEnable(GL_FRAMEBUFFER_SRGB);    // Enable SRGB framebuffer (only if required)
-    rlClearScreenBuffers();             // Clear current framebuffer
-    
     rlEnableStereoRender();
     
     // Set stereo render matrices
     rlSetMatrixProjectionStereo(config.projection[0], config.projection[1]);
     rlSetMatrixViewOffsetStereo(config.viewOffset[0], config.viewOffset[1]);
-#endif
 }
 
 // End VR drawing process (and desktop mirror)
 void EndVrStereoMode(void)
 {
-#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
     rlDisableStereoRender();
-
-    rlDisableFramebuffer();         // Unbind current framebuffer
-
-    // Reset viewport and default projection-modelview matrices
-    rlViewport(0, 0, GetScreenWidth(), GetScreenHeight());
-    rlSetMatrixProjection(MatrixOrtho(0.0, GetScreenWidth(), GetScreenHeight(), 0.0, 0.0, 1.0));
-    rlSetMatrixModelview(MatrixIdentity());
-
-    rlDisableDepthTest();
-#endif
 }
 
 // Load VR stereo config for VR simulator device parameters
diff --git a/src/raylib.h b/src/raylib.h
index e8d45a910..4c70e48af 100644
--- a/src/raylib.h
+++ b/src/raylib.h
@@ -965,7 +965,7 @@ RLAPI void BeginBlendMode(int mode);                              // Begin blend
 RLAPI void EndBlendMode(void);                                    // End blending mode (reset to default: alpha blending)
 RLAPI void BeginScissorMode(int x, int y, int width, int height); // Begin scissor mode (define screen area for following drawing)
 RLAPI void EndScissorMode(void);                                  // End scissor mode
-RLAPI void BeginVrStereoMode(RenderTexture2D target, VrStereoConfig config); // Begin stereo rendering (requires VR simulator)
+RLAPI void BeginVrStereoMode(VrStereoConfig config);              // Begin stereo rendering (requires VR simulator)
 RLAPI void EndVrStereoMode(void);                                 // End stereo rendering (requires VR simulator)
 
 // VR stereo config functions for VR simulator