def demo2():
width, height = 2000, 1600
canv = canvas(width, height, 10, 'output.mp4')
canv.set_bg_color(0, 0, 0)
c = circle(0, 0, 5)
ca.hold(canv, c, times=3)
canv.save()
def demo3():
width, height = 2000, 1600
canv = canvas(width, height, 200, 'output.mp4')
canv.set_bg_color(0, 0, 0)
polygons = [polygon(0, 0, i, i + 2, path_width=0.2) for i in range(1, 100)]
for p in polygons:
ca.hold(canv, p, time=0.1)
canv.add_bg_obj(p)
canv.save()
def demo4():
width, height = 2000, 1600
canv = canvas(width, height, 10, 'output.mp4')
canv.set_bg_color(0, 0, 0)
d = circle(0, 0, 1, dashed=True)
for i in range(180):
ca.hold(canv, d, time=0.05)
d.rad = d.rad + 0.01
canv.save()
def demo1():
width, height = 2000, 1600
canv = canvas(width, height, 10, 'output.mp4')
canv.set_bg_color(0, 0, 0)
c = circle(-3, 0, 3, fill_color=(0, 1, 0, 0.5))
sub_c = circle(-3, 0, 2, fill_color=(1, 0, 0, 0.5))
r = rectangle(2, 1, 3, -1, fill_color=(0, 0, 1, 0.5))
ca.obj2obj_pairs(canv, [
(c, r, 2),
(sub_c, r, 3),
])
ca.obj2obj_pairs(canv, [
(r, c, 2),
(r, sub_c, 1),
])
canv.save()
def demo6():
width, height = 3000, 1600
canv = canvas(width, height, 20, 'output.mp4')
# canv.add_function(lambda pos: (pos[0] / (pos[0] ** 2 + pos[1] ** 2), pos[1] / (pos[0] ** 2 + pos[1] ** 2))) # 复平面变换 z -> 1/z
canv.add_function(
lambda pos:
(pos[0] * np.cos(pos[1]), pos[0] * np.sin(pos[1]))) # 平面坐标转极坐标
canv.set_bg_color(0, 0, 0)
x = np.linspace(-3 * np.pi, 3 * np.pi, 2000)
obj2 = aniobject((x, -3 * np.sin(2 * x)))
ca.show_creation(canv, obj2, time=3)
for i in np.linspace(-3, 3, 90):
obj2.path = (x, i * np.sin(2 * x))
ca.hold(canv, obj2, time=0.01)
ca.fade_out(canv, obj2, time=2)
canv.save()
def demo5():
width, height = 3000, 1600
canv = canvas(width, height, 10, 'output.mp4')
canv.set_bg_color(0, 0, 0)
c1 = circle(0,
0,
2,
fill_color=(255 / 225.0, 130 / 225.0, 203 / 225.0, 0.8))
c2 = circle(0, 0, 3)
ca.show_creation(canv, c1, c2)
ca.fade_out(canv, c1, c2)
ca.fade_in(canv, c1, c2)
r = rectangle(3,
1,
4,
-1,
fill_color=(255 / 225.0, 130 / 225.0, 203 / 225.0, 0.8))
ca.obj2obj_pairs(canv, (c1, r, 1), (c2, r, 2))
canv.save()
def main():
width, height, scale = 128, 128, 16
canv = canvas(width * scale, height * scale, 1, "output.mp4")
game = game_of_life(width, height)
board = game.get_board()
for i in range(20):
for j in range(20):
pattern(board, 1 + 5 * i, 1 + 5 * j)
game.user_init(board)
for time in range(300):
game.update()
canv.frame_array = update_from_board(game.get_board(), scale, scale)
canv.update()
if time % 10 == 0:
print("正在写入第%d帧......" % time)
canv.save()