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public static TransformDirectionFromTo ( |
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/// <summary>
/// Given two points and the transform that they are in, set position, rotation, and scale of a cylinder transform to connect it between the two points
/// </summary>
/// <param name="endPointSpace"></param>
/// <param name="a">One end point in the space of endPointSpace</param>
/// <param name="b">Other end point in the space of endPointSpace</param>
/// <param name="cylTransform">transform for the cylinder primitive to connect</param>
public static void ConnectCylinderBetweenPoints(Transform endPointSpace, Vector3 a, Vector3 b, Transform cylTransform)
{
cylTransform.localPosition = MathUtils.TransformPointFromTo(endPointSpace, cylTransform.parent, 0.5f * (a + b));
Vector3 dir = MathUtils.TransformDirectionFromTo(endPointSpace, cylTransform.parent, (b - a).normalized);
cylTransform.localRotation = Quaternion.LookRotation(dir) * Quaternion.FromToRotation(Vector3.up, Vector3.forward);
Vector3 scale = cylTransform.localScale;
scale.y = (a - b).magnitude * 0.5f;
cylTransform.localScale = scale;
}
/// <summary>
/// Returns if a point will be rendered on the screen in either eye
/// </summary>
/// <param name="position"></param>
/// <returns></returns>
public static bool IsInFOV(Vector3 position)
{
float verticalFovHalf = Camera.main.fieldOfView / 2;
float horizontalFovHalf = GetHorizontalFieldOfViewRadians() * Mathf.Rad2Deg / 2;
Vector3 deltaPos = position - Camera.main.transform.position;
Vector3 headDeltaPos = MathUtils.TransformDirectionFromTo(null, Camera.main.transform, deltaPos).normalized;
float yaw = Mathf.Asin(headDeltaPos.x) * Mathf.Rad2Deg;
float pitch = Mathf.Asin(headDeltaPos.y) * Mathf.Rad2Deg;
return(Mathf.Abs(yaw) < horizontalFovHalf && Mathf.Abs(pitch) < verticalFovHalf);
}
/// <summary>
/// Position transform along the gaze direction and orient yaw to match, with the specified offset
/// </summary>
/// <param name="stageTransform">transform of higher-level space where 0,1,0 is up</param>
/// <param name="tran">transform to be repositioned</param>
/// <param name="offset">translation offset, Z is forward</param>
/// <param name="yawOffset">yaw offset</param>
public static void MoveObjectInFrontOfUser(Transform stageTransform, Transform tran, Vector3 offset, float yawOffset)
{
// have obj track head position with translation offset
Vector3 stageHeadPos = MathUtils.TransformPointFromTo(null, stageTransform, Camera.main.transform.transform.position);
Vector3 stageHeadDir = MathUtils.TransformDirectionFromTo(null, stageTransform, Camera.main.transform.transform.forward);
stageHeadDir.y = 0.0f; // ignore head pitch - use head position to set height
stageHeadDir.Normalize();
Vector3 sideDir = Vector3.Cross(stageHeadDir, Vector3.up).normalized;
Vector3 stageNewPos = stageHeadPos + stageHeadDir * offset.z + Vector3.up * offset.y + sideDir * offset.x;
tran.localPosition = MathUtils.TransformPointFromTo(stageTransform, tran.parent, stageNewPos);
// also track head yaw
Vector3 toDir = MathUtils.TransformDirectionFromTo(stageTransform, tran.parent, stageHeadDir);
Quaternion rot = Quaternion.FromToRotation(Vector3.forward, toDir.normalized) * Quaternion.Euler(0.0f, yawOffset, 0.0f);
tran.localRotation = rot;
}
