93 lines
2.9 KiB
Python
93 lines
2.9 KiB
Python
"""
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Drawing Gradients
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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.gradients
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"""
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import arcade
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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 = "Gradients 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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arcade.set_background_color(arcade.color.BLACK)
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self.shapes = arcade.ShapeElementList()
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# This is a large rectangle that fills the whole
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# background. The gradient goes between the two colors
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# top to bottom.
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color1 = (215, 214, 165)
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color2 = (219, 166, 123)
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points = (0, 0), (SCREEN_WIDTH, 0), (SCREEN_WIDTH, SCREEN_HEIGHT), (0, SCREEN_HEIGHT)
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colors = (color1, color1, color2, color2)
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rect = arcade.create_rectangle_filled_with_colors(points, colors)
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self.shapes.append(rect)
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# Another rectangle, but in this case the color doesn't change. Just the
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# transparency. This time it goes from left to right.
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color1 = (165, 92, 85, 255)
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color2 = (165, 92, 85, 0)
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points = (100, 100), (SCREEN_WIDTH - 100, 100), (SCREEN_WIDTH - 100, 300), (100, 300)
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colors = (color2, color1, color1, color2)
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rect = arcade.create_rectangle_filled_with_colors(points, colors)
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self.shapes.append(rect)
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# Two lines
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color1 = (7, 67, 88)
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color2 = (69, 137, 133)
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points = (100, 400), (SCREEN_WIDTH - 100, 400), (SCREEN_WIDTH - 100, 500), (100, 500)
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colors = (color2, color1, color2, color1)
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shape = arcade.create_lines_with_colors(points, colors, line_width=5)
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self.shapes.append(shape)
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# Triangle
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color1 = (215, 214, 165)
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color2 = (219, 166, 123)
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color3 = (165, 92, 85)
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points = (SCREEN_WIDTH // 2, 500), (SCREEN_WIDTH // 2 - 100, 400), (SCREEN_WIDTH // 2 + 100, 400)
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colors = (color1, color2, color3)
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shape = arcade.create_triangles_filled_with_colors(points, colors)
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self.shapes.append(shape)
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# Ellipse, gradient between center and outside
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color1 = (69, 137, 133, 127)
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color2 = (7, 67, 88, 127)
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shape = arcade.create_ellipse_filled_with_colors(SCREEN_WIDTH // 2, 350, 50, 50,
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inside_color=color1, outside_color=color2)
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self.shapes.append(shape)
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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.shapes.draw()
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# arcade.draw_rectangle_filled(500, 500, 50, 50, (255, 0, 0, 127))
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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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