public void Rotate(Shape shape, RotationDirection direction)
{
foreach (var box in shape.Boxes)
{
var radius = mathHelperService.CalculateRadius(box.X, box.Y, shape.CenterX, shape.CenterY);
if (radius == 0)
{
// The box is at the center of the shape, no rotation
continue;
}
var adjacentAngle = mathHelperService.CalculateAdjacentAngleInRadians(Math.Abs(box.X - shape.CenterX), radius);
var angle = mathHelperService.CalculateAngleOfRotation(box, shape, direction, adjacentAngle);
box.X = Convert.ToInt32(shape.CenterX + radius * Math.Cos(angle));
box.Y = Convert.ToInt32(shape.CenterY + radius * Math.Sin(angle));
}
}
public void CalculateAdjacentAngleInRadians_WhenHypotenuseIsZero_ThrowsException()
{
Assert.Throws <DivideByZeroException>(() => sut.CalculateAdjacentAngleInRadians(1, 0));
}
