private Vector3 DecideDistractionPoint() // Controls where the light looks to distract the player
{
height = cam.pixelHeight;
width = cam.pixelWidth;
GazePoint gazePoint = TobiiAPI.GetGazePoint();
Vector2 avoidPosition = cam.WorldToScreenPoint(bookshelf.position);
// might be able to check if it is in frame: device.IsInsideFrame()
// Calculate distance to corners of game view
float UpperLeftDist = Vector2.Distance(new Vector2(0, height), avoidPosition);
float BottomLeftDist = Vector2.Distance(new Vector2(0, 0), avoidPosition);
float UpperRightDist = Vector2.Distance(new Vector2(width, height), avoidPosition);
float BottomRightDist = Vector2.Distance(new Vector2(width, 0), avoidPosition);
// Select corner furthest away
Vector2 furthestCorner;
float maxDist = Mathf.Max(UpperLeftDist, BottomLeftDist, UpperRightDist, BottomRightDist);
if (Math.Abs(maxDist - UpperLeftDist) < 0.1)
{
furthestCorner = new Vector2(0, height);
}
else if (Math.Abs(maxDist - UpperRightDist) < 0.1)
{
furthestCorner = new Vector2(width, height);
}
else if (Math.Abs(maxDist - BottomLeftDist) < 0.1)
{
furthestCorner = new Vector2(0, 0);
}
else if (Math.Abs(maxDist - BottomRightDist) < 0.1)
{
furthestCorner = new Vector2(width, 0);
}
else
{
furthestCorner = new Vector2(width, height);
}
// Clamp distraction point
var x = Mathf.Clamp(furthestCorner.x, width * distractionMarginMin, width * distractionMarginMax);
var y = Mathf.Clamp(furthestCorner.y, height * distractionMarginMin, height * distractionMarginMax);
var pos = new Vector2(x, y);
// Cast ray through camera to find point in world coordinates
RaycastHit hit;
Ray ray = cam.ScreenPointToRay(pos);
Physics.Raycast(ray, out hit);
return(hit.point);
}