79 lines
2.1 KiB
Python
79 lines
2.1 KiB
Python
"""
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Using a Vertex Buffer Object With Lines
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If Python and Arcade are installed, this example can be run from the command line with:
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python -m arcade.examples.lines_buffered
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"""
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import arcade
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import random
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# Do the math to figure out our screen dimensions
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SCREEN_WIDTH = 800
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SCREEN_HEIGHT = 600
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SCREEN_TITLE = "Vertex Buffer Object With Lines Example"
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class MyGame(arcade.Window):
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"""
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Main application class.
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"""
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def __init__(self, width, height, title):
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"""
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Set up the application.
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"""
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super().__init__(width, height, title)
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self.shape_list = arcade.ShapeElementList()
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point_list = ((0, 50),
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(10, 10),
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(50, 0),
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(10, -10),
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(0, -50),
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(-10, -10),
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(-50, 0),
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(-10, 10),
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(0, 50))
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colors = [
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getattr(arcade.color, color)
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for color in dir(arcade.color)
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if not color.startswith("__")
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]
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for i in range(200):
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x = SCREEN_WIDTH // 2 - random.randrange(SCREEN_WIDTH)
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y = SCREEN_HEIGHT // 2 - random.randrange(SCREEN_HEIGHT)
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color = random.choice(colors)
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points = [(px + x, py + y) for px, py in point_list]
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my_line_strip = arcade.create_line_strip(points, color, 5)
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self.shape_list.append(my_line_strip)
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self.shape_list.center_x = SCREEN_WIDTH // 2
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self.shape_list.center_y = SCREEN_HEIGHT // 2
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self.shape_list.angle = 0
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arcade.set_background_color(arcade.color.BLACK)
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def on_draw(self):
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"""
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Render the screen.
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"""
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# This command has to happen before we start drawing
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arcade.start_render()
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self.shape_list.draw()
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def update(self, delta_time):
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self.shape_list.angle += 1
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self.shape_list.center_x += 0.1
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self.shape_list.center_y += 0.1
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def main():
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MyGame(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
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arcade.run()
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if __name__ == "__main__":
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main()
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