65 lines
1.6 KiB
Python
65 lines
1.6 KiB
Python
import pygame
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from compute import matmul, rot_2D
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from game import Game
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EARTH_RADIUS = 30
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MOON_RADIUS = 10
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MOON_DISTANCE = 100.0
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MOON_ANGLE = 0.01
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BLACK = (0, 0, 0)
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BLUE = (0, 0, 255)
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GRAY = (200, 200, 200)
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class Moon(Game):
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"""Der Mond kreist um die Erde."""
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def __init__(self, title="Moon", fps=60, size=(640, 400)):
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super().__init__(title, fps, size)
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self.center_x = size[0] // 2
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self.center_y = size[1] // 2
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self.init_positions()
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def init_positions(self):
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self.position_moon = (MOON_DISTANCE, 0.0)
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self.rot_moon = rot_2D(MOON_ANGLE)
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def rotate_point(self, position, rotation):
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result = matmul(rotation, [[position[0]], [position[1]]])
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return (result[0][0], result[1][0])
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def update_game(self):
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self.update_positions()
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return True
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def update_positions(self):
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self.position_moon = self.rotate_point(self.position_moon, self.rot_moon)
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def to_screen(self, position):
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return (int(self.center_x + position[0]), int(self.center_y + position[1]))
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def draw_game(self):
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self.screen.fill(BLACK)
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self.draw_scene()
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pygame.display.flip()
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def draw_scene(self):
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self.draw_earth()
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self.draw_moon()
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def draw_earth(self):
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pygame.draw.circle(
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self.screen, BLUE, (self.center_x, self.center_y), EARTH_RADIUS
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)
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def draw_moon(self):
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pygame.draw.circle(
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self.screen, GRAY, self.to_screen(self.position_moon), MOON_RADIUS
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)
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if __name__ == "__main__":
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Moon().run()
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