// Use this for initialization
void Start()
{
//we need a dummy RenderTexture for camera to let it do off-screen rendering.
RenderTexture dummyRT = new RenderTexture(1024,
1024,
24,
RenderTextureFormat.ARGB32);
dummyRT.antiAliasing = 1;
dummyRT.useMipMap = false;
dummyRT.autoGenerateMips = false;
//Even though we could set the dimension here, it will not work properly anyway.
dummyRT.dimension = TextureDimension.Tex2DArray;
dummyRT.volumeDepth = 2;
dummyRT.Create();
mainCam.targetTexture = dummyRT;
mainCam.forceIntoRenderTexture = true;
//Very few documentations about this variable, not sure if I set this right.
Vector4[] unity_StereoScaleOffset = new Vector4[2];
unity_StereoScaleOffset[0] = new Vector4(1.0f, 1.0f, 0f, 0f);
unity_StereoScaleOffset[1] = new Vector4(1.0f, 1.0f, 0.5f, 0f);
Shader.SetGlobalVectorArray("unity_StereoScaleOffset", unity_StereoScaleOffset);
//Add callback to hack frambuffer
//In unity forward rendering path, the BeforeForwardOpaque event will occur first
//so, here is the point we change the framebuffer's binding in native plugin.
NativePlugin.AddCameraCallbacks(mainCam, CameraEvent.BeforeForwardOpaque);
//Clear framebuffer.
//In many cases Unity will always clear it for us, this is like a double-check
CommandBuffer cb = new CommandBuffer();
cb.ClearRenderTarget(true, true, mainCam.backgroundColor);
mainCam.AddCommandBuffer(CameraEvent.BeforeForwardOpaque, cb);
float eyeOffset = mainCam.stereoSeparation / 2.0f;
eyeOffsetVector = new Vector3(eyeOffset, 0, 0);
}
void Awake()
{
mainCam = GetComponent <Camera>();
if (mainCam == null)
{
Debug.LogError("Can't find Camera!");
DestroyImmediate(this);
return;
}
//Enable these keywords to let the unity shaders works for single pass stereo rendering
Shader.EnableKeyword("STEREO_MULTIVIEW_ON");
Shader.EnableKeyword("UNITY_SINGLE_PASS_STEREO");
//Texture2DArray could only be generated in runtime
renderTexture = new Texture2DArray(1024, 1024, 2, TextureFormat.ARGB32, false);
System.IntPtr tid = renderTexture.GetNativeTexturePtr();
Debug.Log("Texture ID " + (int)tid);
//Tell native plugin the texture id
NativePlugin.SetTextureID((int)tid);
NativePlugin.SetAntiAliasing(QualitySettings.antiAliasing);
}
