SteamVR_Skybox.cs

//======= Copyright (c) Valve Corporation, All rights reserved. ===============
//
// Purpose: Sets cubemap to use in the compositor.
//
//=============================================================================

using UnityEngine;
using Valve.VR;

public class SteamVR_Skybox : MonoBehaviour
{
    // Note: Unity's Left and Right Skybox shader variables are switched.
    public Texture front, back, left, right, top, bottom;

    public enum CellSize
    {
        x1024, x64, x32, x16, x8
    }
    public CellSize StereoCellSize = CellSize.x32;

    public float StereoIpdMm = 64.0f;

    public void SetTextureByIndex(int i, Texture t)
    {
        switch (i)
        {
            case 0:
                front = t;
                break;
            case 1:
                back = t;
                break;
            case 2:
                left = t;
                break;
            case 3:
                right = t;
                break;
            case 4:
                top = t;
                break;
            case 5:
                bottom = t;
                break;
        }
    }

    public Texture GetTextureByIndex(int i)
    {
        switch (i)
        {
            case 0:
                return front;
            case 1:
                return back;
            case 2:
                return left;
            case 3:
                return right;
            case 4:
                return top;
            case 5:
                return bottom;
        }
        return null;
    }

    static public void SetOverride(
        Texture front = null,
        Texture back = null,
        Texture left = null,
        Texture right = null,
        Texture top = null,
        Texture bottom = null )
    {
        var compositor = OpenVR.Compositor;
        if (compositor != null)
        {
            var handles = new Texture[] { front, back, left, right, top, bottom };
            var textures = new Texture_t[6];
            for (int i = 0; i < 6; i++)
            {
                textures[i].handle = (handles[i] != null) ? handles[i].GetNativeTexturePtr() : System.IntPtr.Zero;
                textures[i].eType = SteamVR.instance.textureType;
                textures[i].eColorSpace = EColorSpace.Auto;
            }
            var error = compositor.SetSkyboxOverride(textures);
            if (error != EVRCompositorError.None)
            {
                Debug.LogError("Failed to set skybox override with error: " + error);
                if (error == EVRCompositorError.TextureIsOnWrongDevice)
                    Debug.Log("Set your graphics driver to use the same video card as the headset is plugged into for Unity.");
                else if (error == EVRCompositorError.TextureUsesUnsupportedFormat)
                    Debug.Log("Ensure skybox textures are not compressed and have no mipmaps.");
            }
        }
    }

    static public void ClearOverride()
    {
        var compositor = OpenVR.Compositor;
        if (compositor != null)
            compositor.ClearSkyboxOverride();
    }

    void OnEnable()
    {
        SetOverride(front, back, left, right, top, bottom);
    }

    void OnDisable()
    {
        ClearOverride();
    }
}