/**
* Normalizes a point on screen in screen dims
*
* @param point in pixels
* @param screenWidth in pixels
* @param screenHeight in pixels
* @return a 2d point in relative values
*/
public static Point2D getNormalizedCoords(Point2D point, int screenWidth, int screenHeight) {
Point2D norm = null;
if (null != point) {
norm = new Point2D(point);
norm.x /= screenWidth;
norm.y /= screenHeight;
}
return norm;
}
/**
* Converts a relative point to screen point in pixels.
*
* @param point in relative values
* @param screenWidth in pixels
* @param screenHeight in pixels
* @return a 2d point in pixels
*/
public static Point2D getRelativeToScreenSpace(Point2D point, int screenWidth, int screenHeight) {
Point2D screenPoint = null;
if (null != point) {
screenPoint = new Point2D(point);
screenPoint.x = Math.round(screenPoint.x * screenWidth);
screenPoint.y = Math.round(screenPoint.y * screenHeight);
}
return screenPoint;
}
/**
* Maps eye position of gaze coords in pixels within normalized space [x: -1:1 , y: -1:1]
*
* @param point in pixels
* @param screenWidth in pixels
* @param screenHeight in pixels
* @return a relative point mapped into normalized space [x: -1:1 , y: -1:1]
*/
public static Point2D getNormalizedMapping(Point2D point, int screenWidth, int screenHeight) {
Point2D normMap = getNormalizedCoords(point, screenWidth, screenHeight);
if (null != normMap) {
// scale up and shift
normMap.x *= 2f;
normMap.x -= 1f;
normMap.y *= 2f;
normMap.y -= 1f;
}
return normMap;
}