private bool GetPlaneIntersection(Vector2 guiPosition, out Vector3 worldPlanePosition)
{
#if ENABLE_DEBUG_GRID
Grid.debugGrid = null;
#endif
if (worldSlideGrid == null)
{
worldPlanePosition = worldSlideOrigin;
return(false);
}
var originSnappedPlane = new Plane(worldSlidePlane.normal, worldSlideOrigin);
var worldRay = UnityEditor.HandleUtility.GUIPointToWorldRay(guiPosition);
var dist = 0.0f;
var camera = Camera.current;
var forward = camera.transform.forward;
if (Mathf.Abs(Vector3.Dot(originSnappedPlane.normal, forward)) < 0.125f)
{
var normal = worldSlideGrid.GetClosestAxisVector(forward);
var origin = originSnappedPlane.ClosestPointOnPlane(worldSlideOrigin);
return(GetIntersectionOnAlternativePlane(worldRay, normal, origin, out worldPlanePosition));
}
if (!originSnappedPlane.Raycast(worldRay, out dist))
{
dist = float.PositiveInfinity;
}
float farClipPlaneDistance = camera.farClipPlane * 0.5f;
if (dist > farClipPlaneDistance)
{
var normal = worldSlideGrid.GetClosestAxisVector(forward);
var origin = originSnappedPlane.ClosestPointOnPlane(camera.transform.position) + (normal * farClipPlaneDistance);
return(GetIntersectionOnAlternativePlane(worldRay, normal, origin, out worldPlanePosition));
}
else
{
if (!originSnappedPlane.SignedRaycast(worldRay, out dist))
{
worldPlanePosition = worldSlideOrigin; return(false);
}
worldPlanePosition = worldRay.GetPoint(Mathf.Abs(dist));
#if ENABLE_DEBUG_GRID
{
var tangent = GeometryUtility.CalculateTangent(worldSlidePlane.normal);
var planeOrientation = Quaternion.LookRotation(tangent, worldSlidePlane.normal);
Grid.debugGrid = new Grid(Matrix4x4.TRS(worldPlanePosition, planeOrientation, Vector3.one));
}
#endif
return(true);
}
}
public static void CalculateTangents(Vector3 normal, out Vector3 tangent, out Vector3 binormal)
{
tangent = Vector3.Cross(normal, GeometryUtility.CalculateTangent(normal)).normalized;
binormal = Vector3.Cross(normal, tangent).normalized;
}
