``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92``` ```""" Drawing Gradients If Python and Arcade are installed, this example can be run from the command line with: python -m arcade.examples.gradients """ import arcade # Do the math to figure out our screen dimensions SCREEN_WIDTH = 800 SCREEN_HEIGHT = 600 SCREEN_TITLE = "Gradients Example" class MyGame(arcade.Window): """ Main application class. """ def __init__(self, width, height, title): """ Set up the application. """ super().__init__(width, height, title) arcade.set_background_color(arcade.color.BLACK) self.shapes = arcade.ShapeElementList() # This is a large rectangle that fills the whole # background. The gradient goes between the two colors # top to bottom. color1 = (215, 214, 165) color2 = (219, 166, 123) points = (0, 0), (SCREEN_WIDTH, 0), (SCREEN_WIDTH, SCREEN_HEIGHT), (0, SCREEN_HEIGHT) colors = (color1, color1, color2, color2) rect = arcade.create_rectangle_filled_with_colors(points, colors) self.shapes.append(rect) # Another rectangle, but in this case the color doesn't change. Just the # transparency. This time it goes from left to right. color1 = (165, 92, 85, 255) color2 = (165, 92, 85, 0) points = (100, 100), (SCREEN_WIDTH - 100, 100), (SCREEN_WIDTH - 100, 300), (100, 300) colors = (color2, color1, color1, color2) rect = arcade.create_rectangle_filled_with_colors(points, colors) self.shapes.append(rect) # Two lines color1 = (7, 67, 88) color2 = (69, 137, 133) points = (100, 400), (SCREEN_WIDTH - 100, 400), (SCREEN_WIDTH - 100, 500), (100, 500) colors = [color2, color1, color2, color1] shape = arcade.create_lines_with_colors(points, colors, line_width=5) self.shapes.append(shape) # Triangle color1 = (215, 214, 165) color2 = (219, 166, 123) color3 = (165, 92, 85) points = (SCREEN_WIDTH // 2, 500), (SCREEN_WIDTH // 2 - 100, 400), (SCREEN_WIDTH // 2 + 100, 400) colors = (color1, color2, color3) shape = arcade.create_triangles_filled_with_colors(points, colors) self.shapes.append(shape) # Ellipse, gradient between center and outside color1 = (69, 137, 133, 127) color2 = (7, 67, 88, 127) shape = arcade.create_ellipse_filled_with_colors(SCREEN_WIDTH // 2, 350, 50, 50, inside_color=color1, outside_color=color2) self.shapes.append(shape) def on_draw(self): """ Render the screen. """ # This command has to happen before we start drawing self.clear() self.shapes.draw() # arcade.draw_rectangle_filled(500, 500, 50, 50, (255, 0, 0, 127)) def main(): MyGame(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE) arcade.run() if __name__ == "__main__": main() ```