/**
* Intersect the rectangle with another rectangle.
*
* @param other the other rectangle
* @return the intersection of this rectangle with the other one
*/
@Nullable
public Rect intersect(Rect other) {
Rect intersection;
int left1 = getX();
int right1 = getX() + getWidth();
int top1 = getY();
int bottom1 = getY() + getHeight();
int left2 = other.getX();
int right2 = other.getX() + other.getWidth();
int top2 = other.getY();
int bottom2 = other.getY() + other.getHeight();
if (right1 < left2 || right2 < left1 || bottom1 < top2 || bottom2 < top1) {
intersection = null;
} else {
int x = Math.max(left1, left2);
int width = Math.min(right1, right2) - x;
int y = Math.max(top1, top2);
int height = Math.min(bottom1, bottom2) - y;
intersection = new Rect(x, y, width, height);
}
return intersection;
}
/**
* Create the positions array of the verticies for the rectangle.
*
* @param rect the position and size of the rectangle
* @return the positions
*/
@Nonnull
private float[] createPositions(@Nonnull Rect rect) {
return new float[] {
rect.getX(),
rect.getY(),
rect.getX() + rect.getWidth(),
rect.getY(),
rect.getX() + rect.getWidth(),
rect.getY() + rect.getHeight(),
rect.getX(),
rect.getY() + rect.getHeight()
};
}