From 5af1b4a7c9119cf438e4cb5303009fbe9a25c6d7 Mon Sep 17 00:00:00 2001
From: Ray <raysan5@gmail.com>
Date: Sun, 9 Oct 2016 20:56:58 +0200
Subject: [PATCH] Added simulated head-tracking on VR simulator

A simple 1st person camera... still requires some work...
---
 examples/core_oculus_rift.c | 7 +++++--
 src/raylib.h                | 1 +
 src/rlgl.c                  | 6 ++++++
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/examples/core_oculus_rift.c b/examples/core_oculus_rift.c
index 88e411d4..3d8bb278 100644
--- a/examples/core_oculus_rift.c
+++ b/examples/core_oculus_rift.c
@@ -37,6 +37,8 @@ int main()
     
     Vector3 cubePosition = { 0.0f, 0.0f, 0.0f };
     
+    SetCameraMode(camera, CAMERA_FIRST_PERSON);
+    
     SetTargetFPS(90);                   // Set our game to run at 90 frames-per-second
     //--------------------------------------------------------------------------------------
 
@@ -45,7 +47,8 @@ int main()
     {
         // Update
         //----------------------------------------------------------------------------------
-        UpdateVrTracking();
+        if (IsVrSimulator()) UpdateCamera(&camera);
+        else UpdateVrTracking();
         
         if (IsKeyPressed(KEY_SPACE)) ToggleVrMode();
         //----------------------------------------------------------------------------------
@@ -61,7 +64,7 @@ int main()
                 DrawCube(cubePosition, 2.0f, 2.0f, 2.0f, RED);
                 DrawCubeWires(cubePosition, 2.0f, 2.0f, 2.0f, MAROON);
 
-                DrawGrid(10, 1.0f);
+                DrawGrid(40, 1.0f);
 
             End3dMode();
 
diff --git a/src/raylib.h b/src/raylib.h
index 3b752785..df0ee7bc 100644
--- a/src/raylib.h
+++ b/src/raylib.h
@@ -891,6 +891,7 @@ RLAPI void DestroyLight(Light light);                                     // Des
 RLAPI void InitVrDevice(int vdDevice);            // Init VR device
 RLAPI void CloseVrDevice(void);                   // Close VR device
 RLAPI bool IsVrDeviceReady(void);                 // Detect if VR device (or simulator) is ready
+RLAPI bool IsVrSimulator(void);                   // Detect if VR simulator is running
 RLAPI void UpdateVrTracking(void);                // Update VR tracking (position and orientation)
 RLAPI void ToggleVrMode(void);                    // Enable/Disable VR experience (device or simulator)
 
diff --git a/src/rlgl.c b/src/rlgl.c
index 244de52c..702edb18 100644
--- a/src/rlgl.c
+++ b/src/rlgl.c
@@ -2710,6 +2710,12 @@ bool IsVrDeviceReady(void)
     return (vrDeviceReady || vrSimulator) && vrEnabled;
 }
 
+// Detect if VR simulator is running
+bool IsVrSimulator(void)
+{
+    return vrSimulator;
+}
+
 // Enable/Disable VR experience (device or simulator)
 void ToggleVrMode(void)
 {