Initial commit

Assets/Fragilem17/Portals for VR/Shaders/Portals.cginc

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+bool IsStereoEyeLeft(float3 WorldCamPos, float3 WorldCamRight, float force)
+{
+	if(force >= 0){
+		return force == 0;
+	}
+#if defined(USING_STEREO_MATRICES)
+	// Unity 5.4 has this new variable
+	return (unity_StereoEyeIndex == 0);
+#elif defined (UNITY_DECLARE_MULTIVIEW)
+	// OVR_multiview extension
+	return (UNITY_VIEWID == 0);
+#else
+	// NOTE: Bug #1165: _WorldSpaceCameraPos is not correct in multipass VR (when skybox is used) but UNITY_MATRIX_I_V seems to be
+	#if defined(UNITY_MATRIX_I_V)
+		float3 renderCameraPos = UNITY_MATRIX_I_V._m03_m13_m23;
+	#else
+		float3 renderCameraPos = _WorldSpaceCameraPos.xyz;
+	#endif
+
+	float fL = distance(WorldCamPos - WorldCamRight, renderCameraPos);
+	float fR = distance(WorldCamPos + WorldCamRight, renderCameraPos);
+	return (fL < fR);
+#endif
+}
+
+void StereoSwitch_half(float3 WorldCameraPosition, float3 WorldCameraRight, float Force, float4 Left, float4 Right, out float4 Out) {
+	Out = Left;
+	if (IsStereoEyeLeft(WorldCameraPosition, WorldCameraRight, Force)){
+	  Out = Left;
+	}
+	else {
+	  Out = Right;
+	}
+}
+void StereoSwitch_float(float3 WorldCameraPosition, float3 WorldCameraRight, float Force, float4 Left, float4 Right, out float4 Out) {
+	Out = Left;
+	if (IsStereoEyeLeft(WorldCameraPosition, WorldCameraRight, Force)){
+	  Out = Left;
+	}
+	else {
+	  Out = Right;
+	}
+}