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