class ShapeFacade:
_circle = None
_square = None
_triangle = None
def __init__(self):
self._circle = Circle()
self._square = Square()
self._triangle = Triangle()
# let's say the task is to create an easy interface to draw shapes
def draw_circle(self):
# TODO drawing circle complexity goes here
# step 1 (ex. get pen)
# step 2 (ex. go to whiteboard)
# step 3 (ex. touch the whiteboard with the pen)
# ...
self._circle.draw()
def draw_square(self):
# TODO drawing square complexity goes here
# step 1
# step 2
# step 3
# ...
self._square.draw()
def draw_triangle(self):
# TODO drawing triangle complexity goes here
# step 1
# step 2
# step 3
# ...
self._triangle.draw()
class CircleRail():
"""円レール
"""
def __init__(self):
self.__drawing_top = 0
self.__drawing_bottom = 0
self.__border_rect = Rectangle()
self.__radius = 0
self.__center = (0, 0)
self.__theta = 0
self.__triangle = Triangle()
self.__triangle.edge_color = PALE_GRAY
self.__triangle.node_radius = GRID_UNIT / 2
self.__triangle.nodes_color = (PALE_RED, PALE_BLUE, PALE_GREEN
) # 緑と青が逆なのが工夫
self.__triangle.center_color = PALE_GRAY
@property
def radius(self):
"""半径"""
return self.__radius
@property
def diameter(self):
"""直径"""
return 2 * self.__radius
@property
def border_rect(self):
"""境界線の矩形"""
return self.__border_rect
@border_rect.setter
def border_rect(self, val):
self.__border_rect = val
@property
def drawing_top(self):
"""上下の境界線の上端"""
return self.__drawing_top
@drawing_top.setter
def drawing_top(self, val):
self.__drawing_top = val
@property
def drawing_bottom(self):
"""上下の境界線の下端"""
return self.__drawing_bottom
@drawing_bottom.setter
def drawing_bottom(self, val):
self.__drawing_bottom = val
@radius.setter
def radius(self, val):
self.__radius = val
@property
def center(self):
"""中心座標"""
return self.__center
@center.setter
def center(self, val):
self.__center = val
@property
def theta(self):
"""角度"""
return self.__theta
@theta.setter
def theta(self, theta):
"""円周上の点の位置を設定"""
self.__theta = theta
radius = self.radius
# 円周上の赤い点の位置
red_p = (radius * math.cos(theta) + self.center[0],
-radius * math.sin(theta) + self.center[1]) # yは上下反転
# 円周上の緑の点の位置
green_p = (radius * math.cos(theta - math.radians(120)) +
self.center[0],
-radius * math.sin(theta - math.radians(120)) +
self.center[1])
# 円周上の青の点の位置
blue_p = (radius * math.cos(theta + math.radians(120)) +
self.center[0],
-radius * math.sin(theta + math.radians(120)) +
self.center[1])
self.__triangle.nodes_p = (red_p, green_p, blue_p)
@property
def triangle(self):
"""円に内接する三角形"""
return self.__triangle
@property
def upper_bound_y(self):
"""上限"""
return min(self.__triangle.nodes_p[0][1],
self.__triangle.nodes_p[0][1],
self.__triangle.nodes_p[0][1])
@property
def lower_bound_y(self):
"""下限"""
return max(self.__triangle.nodes_p[0][1],
self.__triangle.nodes_p[0][1],
self.__triangle.nodes_p[0][1])
@property
def inner_height(self):
"""上限と下限の差分の長さ"""
return self.lower_bound_y - self.upper_bound_y # yは逆さ
@property
def zoom(self):
"""直径に対するinner_heightの割合。0.0～1.0"""
return self.inner_height / self.diameter
def draw_circle(self, canvas):
"""描きます"""
# 円レール。描画する画像を指定、座標（x,y),半径、色、線の太さ（-1は塗りつぶし）
cv2.circle(canvas,
point_for_cv2(self.center),
int(self.radius),
color_for_cv2(PALE_GRAY, BAR_TICKS),
thickness=2)
def draw_triangle(self, canvas):
"""円に内接する線。正三角形"""
self.__triangle.draw(canvas)