def RotateByRadians(points, radians):
newPoints = []
c = Utils.Centroid(points)
cos = math.cos(radians)
sin = math.sin(radians)
cx = c.X
cy = c.Y
counts = len(points)
for i in range(counts):
p = points[i]
dx = p.X - cx
dy = p.Y - cy
q = PointR()
q.X = dx * cos - dy * sin + cx
q.Y = dx * sin + dy * cos + cy
newPoints.append(q)
return newPoints
def RotatePoint(p, c, radians):
q = PointR()
q.X = (p.X - c.X) * math.cos(radians) - (p.Y - c.Y) * math.sin(radians) + c.X
q.Y = (p.X - c.X) * math.sin(radians) + (p.Y - c.Y) * math.cos(radians) + c.Y
return q
