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//======= Copyright (c) Valve Corporation, All rights reserved. ===============
//
// Purpose: Displays 2d content on a large virtual screen.
//
//=============================================================================
using UnityEngine;
using System.Collections;
using Valve.VR;
public class SteamVR_Overlay : MonoBehaviour
{
public Texture texture;
public bool curved = true;
public bool antialias = true;
public bool highquality = true;
public float scale = 3.0f; // size of overlay view
public float distance = 1.25f; // distance from surface
public float alpha = 1.0f; // opacity 0..1
public Vector4 uvOffset = new Vector4(0, 0, 1, 1);
public Vector2 mouseScale = new Vector2(1, 1);
public Vector2 curvedRange = new Vector2(1, 2);
public VROverlayInputMethod inputMethod = VROverlayInputMethod.None;
static public SteamVR_Overlay instance { get; private set; }
static public string key { get { return "unity:" + Application.companyName + "." + Application.productName; } }
private ulong handle = OpenVR.k_ulOverlayHandleInvalid;
void OnEnable()
{
var overlay = OpenVR.Overlay;
if (overlay != null)
{
var error = overlay.CreateOverlay(key, gameObject.name, ref handle);
if (error != EVROverlayError.None)
{
Debug.Log(overlay.GetOverlayErrorNameFromEnum(error));
enabled = false;
return;
}
}
SteamVR_Overlay.instance = this;
}
void OnDisable()
{
if (handle != OpenVR.k_ulOverlayHandleInvalid)
{
var overlay = OpenVR.Overlay;
if (overlay != null)
{
overlay.DestroyOverlay(handle);
}
handle = OpenVR.k_ulOverlayHandleInvalid;
}
SteamVR_Overlay.instance = null;
}
public void UpdateOverlay()
{
var overlay = OpenVR.Overlay;
if (overlay == null)
return;
if (texture != null)
{
var error = overlay.ShowOverlay(handle);
if (error == EVROverlayError.InvalidHandle || error == EVROverlayError.UnknownOverlay)
{
if (overlay.FindOverlay(key, ref handle) != EVROverlayError.None)
return;
}
var tex = new Texture_t();
tex.handle = texture.GetNativeTexturePtr();
tex.eType = SteamVR.instance.textureType;
tex.eColorSpace = EColorSpace.Auto;
overlay.SetOverlayTexture(handle, ref tex);
overlay.SetOverlayAlpha(handle, alpha);
overlay.SetOverlayWidthInMeters(handle, scale);
overlay.SetOverlayAutoCurveDistanceRangeInMeters(handle, curvedRange.x, curvedRange.y);
var textureBounds = new VRTextureBounds_t();
textureBounds.uMin = (0 + uvOffset.x) * uvOffset.z;
textureBounds.vMin = (1 + uvOffset.y) * uvOffset.w;
textureBounds.uMax = (1 + uvOffset.x) * uvOffset.z;
textureBounds.vMax = (0 + uvOffset.y) * uvOffset.w;
overlay.SetOverlayTextureBounds(handle, ref textureBounds);
var vecMouseScale = new HmdVector2_t();
vecMouseScale.v0 = mouseScale.x;
vecMouseScale.v1 = mouseScale.y;
overlay.SetOverlayMouseScale(handle, ref vecMouseScale);
var vrcam = SteamVR_Render.Top();
if (vrcam != null && vrcam.origin != null)
{
var offset = new SteamVR_Utils.RigidTransform(vrcam.origin, transform);
offset.pos.x /= vrcam.origin.localScale.x;
offset.pos.y /= vrcam.origin.localScale.y;
offset.pos.z /= vrcam.origin.localScale.z;
offset.pos.z += distance;
var t = offset.ToHmdMatrix34();
overlay.SetOverlayTransformAbsolute(handle, SteamVR_Render.instance.trackingSpace, ref t);
}
overlay.SetOverlayInputMethod(handle, inputMethod);
if (curved || antialias)
highquality = true;
if (highquality)
{
overlay.SetHighQualityOverlay(handle);
overlay.SetOverlayFlag(handle, VROverlayFlags.Curved, curved);
overlay.SetOverlayFlag(handle, VROverlayFlags.RGSS4X, antialias);
}
else if (overlay.GetHighQualityOverlay() == handle)
{
overlay.SetHighQualityOverlay(OpenVR.k_ulOverlayHandleInvalid);
}
}
else
{
overlay.HideOverlay(handle);
}
}
public bool PollNextEvent(ref VREvent_t pEvent)
{
var overlay = OpenVR.Overlay;
if (overlay == null)
return false;
var size = (uint)System.Runtime.InteropServices.Marshal.SizeOf(typeof(Valve.VR.VREvent_t));
return overlay.PollNextOverlayEvent(handle, ref pEvent, size);
}
public struct IntersectionResults
{
public Vector3 point;
public Vector3 normal;
public Vector2 UVs;
public float distance;
}
public bool ComputeIntersection(Vector3 source, Vector3 direction, ref IntersectionResults results)
{
var overlay = OpenVR.Overlay;
if (overlay == null)
return false;
var input = new VROverlayIntersectionParams_t();
input.eOrigin = SteamVR_Render.instance.trackingSpace;
input.vSource.v0 = source.x;
input.vSource.v1 = source.y;
input.vSource.v2 = -source.z;
input.vDirection.v0 = direction.x;
input.vDirection.v1 = direction.y;
input.vDirection.v2 = -direction.z;
var output = new VROverlayIntersectionResults_t();
if (!overlay.ComputeOverlayIntersection(handle, ref input, ref output))
return false;
results.point = new Vector3(output.vPoint.v0, output.vPoint.v1, -output.vPoint.v2);
results.normal = new Vector3(output.vNormal.v0, output.vNormal.v1, -output.vNormal.v2);
results.UVs = new Vector2(output.vUVs.v0, output.vUVs.v1);
results.distance = output.fDistance;
return true;
}
}
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