deltaTeleport method
Implementation
void deltaTeleport(double width, double height) {
double x = pos.dx + dx;
double y = pos.dy + dy;
pos = Offset(
x < -size / 2
? width + size / 2
: x > width + size / 2
? -size / 2
: x,
y < -size / 2
? height + size / 2
: y > height + size / 2
? -size / 2
: y);
}