/// <summary>
/// Updates the transforms.
/// </summary>
private void UpdateTransforms()
{
#if UNITY_ANDROID && !UNITY_EDITOR
MiTransform hmdLeftEye = VrManager.Instance.Hmd.GetEyeTransform(Eyes.Left);
MiTransform hmdRightEye = VrManager.Instance.Hmd.GetEyeTransform(Eyes.Right);
//this.CenterEyeTransform.localRotation = hmdLeftEye.Rotation;
//this.LeftEyeTransform.localRotation = hmdLeftEye.Rotation;
//this.RightEyeTransform.localRotation = hmdRightEye.Rotation;
//this.ReticleTransform.localRotation = hmdLeftEye.Rotation;
//Debug.Log(string.Format("hmdLeftEye rotation is {0}", hmdLeftEye.Rotation));
if (!LockRotation)
{
this.transform.localRotation = hmdLeftEye.Rotation;
}
this.CenterEyeTransform.localPosition = 0.5f * (hmdLeftEye.Position + hmdRightEye.Position);
this.LeftEyeTransform.localPosition = hmdLeftEye.Position;
this.RightEyeTransform.localPosition = hmdRightEye.Position;
this.ReticleTransform.localPosition = hmdLeftEye.Position;
#elif UNITY_EDITOR || UNITY_STANDALONE_WIN
MiEmulation emulation = MiEmulation.Instance;
transform.rotation = Quaternion.Euler(emulation.headEulerAngles.y, emulation.headEulerAngles.x, emulation.headEulerAngles.z);
this.CenterEyeTransform.localPosition = Vector3.zero;
this.LeftEyeTransform.localPosition = new Vector3(-emulation.ipd * 0.5f, 0.0f, 0.0f);
this.RightEyeTransform.localPosition = new Vector3(emulation.ipd * 0.5f, 0.0f, 0.0f);
this.CenterEyeTransform.localRotation = Quaternion.identity;
this.LeftEyeTransform.localRotation = Quaternion.identity;
this.RightEyeTransform.localRotation = Quaternion.identity;
#endif
}
/// <summary>
/// OnPreCull is called before a camera culls the scene.
/// </summary>
private void OnPreCull()
{
MiEmulation emulation = MiEmulation.Instance;
float realAspect = (float)Screen.width / Screen.height;
float deviceAspect = emulation.screenSize.x / emulation.screenSize.y;
this.cam.orthographicSize = 0.5f * Mathf.Max(1.0f, deviceAspect / realAspect);
}
/// <summary>
/// Calculate the distortion mesh position and uv
/// </summary>
/// <param name="vertices">mesh vertex positions.</param>
/// <param name="texcoords">mesh vertex texcoords.</param>
private void CalcMeshVertices(out Vector3[] vertices, out Vector2[] texcoords)
{
MiEmulation emulation = MiEmulation.Instance;
float[] frustumFromLens = new float[4];
float[] bareFrustum = new float[4];
emulation.GetFrustum(frustumFromLens, true);
emulation.GetFrustum(bareFrustum, false);
Rect viewport;
viewport = emulation.GetViewport(bareFrustum);
vertices = new Vector3[2 * distortionMeshWidth * distortionMeshHeight];
texcoords = new Vector2[2 * distortionMeshWidth * distortionMeshHeight];
int vertexIndex = 0;
// Caculate left, then right
for (int side = 0; side < 2; side++)
{
for (int row = 0; row < distortionMeshHeight; row++)
{
for (int col = 0; col < distortionMeshWidth; col++)
{
float u = (float)col / (distortionMeshWidth - 1.0f);
float v = (float)row / (distortionMeshHeight - 1.0f);
// do barrel distortion - calc the vertex position in normalized way
float tanAngleX = Mathf.Lerp(frustumFromLens[0], frustumFromLens[2], u);
float tanAngleY = Mathf.Lerp(frustumFromLens[3], frustumFromLens[1], v);
float distorted = Mathf.Sqrt(tanAngleX * tanAngleX + tanAngleY * tanAngleY);
float undistorted = emulation.DistortInverse(distorted);
float x = tanAngleX * undistorted / distorted;
float y = tanAngleY * undistorted / distorted;
x = (x - bareFrustum[0]) / (bareFrustum[2] - bareFrustum[0]);
y = (y - bareFrustum[3]) / (bareFrustum[1] - bareFrustum[3]);
// Convert to screen space
x = (viewport.x + x * viewport.width - 0.5f) * emulation.screenSize.x / emulation.screenSize.y;
y = viewport.y + y * viewport.height - 0.5f;
vertices[vertexIndex] = new Vector3(x, y, 1.0f);
// Modify 's' according the the left or the right side of the mesh.
u = (u + side) * 0.5f;
texcoords[vertexIndex] = new Vector2(u, v);
vertexIndex++;
}
}
// switch to the right side
float w = frustumFromLens[2] - frustumFromLens[0];
frustumFromLens[0] = -(w + frustumFromLens[0]);
frustumFromLens[2] = w - frustumFromLens[2];
w = bareFrustum[2] - bareFrustum[0];
bareFrustum[0] = -(w + bareFrustum[0]);
bareFrustum[2] = w - bareFrustum[2];
viewport.x = 1.0f - (viewport.x + viewport.width);
}
}
