110 lines
3.1 KiB
Python
110 lines
3.1 KiB
Python
"""
|
|
Example "Arcade" library code.
|
|
|
|
This example shows how to use functions and loops to draw a scene.
|
|
It does not assume that the programmer knows how to use classes yet.
|
|
|
|
If Python and Arcade are installed, this example can be run from the command line with:
|
|
python -m arcade.examples.drawing_with_loops
|
|
"""
|
|
|
|
# Library imports
|
|
import arcade
|
|
import random
|
|
|
|
SCREEN_WIDTH = 800
|
|
SCREEN_HEIGHT = 600
|
|
SCREEN_TITLE = "Drawing With Loops Example"
|
|
|
|
|
|
def draw_background():
|
|
"""
|
|
This function draws the background. Specifically, the sky and ground.
|
|
"""
|
|
# Draw the sky in the top two-thirds
|
|
arcade.draw_rectangle_filled(SCREEN_WIDTH / 2, SCREEN_HEIGHT * 2 / 3,
|
|
SCREEN_WIDTH - 1, SCREEN_HEIGHT * 2 / 3,
|
|
arcade.color.SKY_BLUE)
|
|
|
|
# Draw the ground in the bottom third
|
|
arcade.draw_rectangle_filled(SCREEN_WIDTH / 2, SCREEN_HEIGHT / 6,
|
|
SCREEN_WIDTH - 1, SCREEN_HEIGHT / 3,
|
|
arcade.color.DARK_SPRING_GREEN)
|
|
|
|
|
|
def draw_bird(x, y):
|
|
"""
|
|
Draw a bird using a couple arcs.
|
|
"""
|
|
arcade.draw_arc_outline(x, y, 20, 20, arcade.color.BLACK, 0, 90)
|
|
arcade.draw_arc_outline(x + 40, y, 20, 20, arcade.color.BLACK, 90, 180)
|
|
|
|
|
|
def draw_pine_tree(center_x, center_y):
|
|
"""
|
|
This function draws a pine tree at the specified location.
|
|
|
|
Args:
|
|
:center_x: x position of the tree center.
|
|
:center_y: y position of the tree trunk center.
|
|
"""
|
|
# Draw the trunkcenter_x
|
|
arcade.draw_rectangle_filled(center_x, center_y, 20, 40,
|
|
arcade.color.DARK_BROWN)
|
|
|
|
tree_bottom_y = center_y + 20
|
|
|
|
# Draw the triangle on top of the trunk
|
|
point_list = ((center_x - 40, tree_bottom_y),
|
|
(center_x, tree_bottom_y + 100),
|
|
(center_x + 40, tree_bottom_y))
|
|
|
|
arcade.draw_polygon_filled(point_list, arcade.color.DARK_GREEN)
|
|
|
|
|
|
def main():
|
|
"""
|
|
This is the main program.
|
|
"""
|
|
|
|
# Open the window
|
|
arcade.open_window(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
|
|
|
|
# Start the render process. This must be done before any drawing commands.
|
|
arcade.start_render()
|
|
|
|
# Call our drawing functions.
|
|
draw_background()
|
|
|
|
# Loop to draw ten birds in random locations.
|
|
for bird_count in range(10):
|
|
# Any random x from 0 to the width of the screen
|
|
x = random.randrange(0, SCREEN_WIDTH)
|
|
|
|
# Any random y from in the top 2/3 of the screen.
|
|
# No birds on the ground.
|
|
y = random.randrange(SCREEN_HEIGHT / 3, SCREEN_HEIGHT - 20)
|
|
|
|
# Draw the bird.
|
|
draw_bird(x, y)
|
|
|
|
# Draw the top row of trees
|
|
for x in range(45, SCREEN_WIDTH, 90):
|
|
draw_pine_tree(x, SCREEN_HEIGHT / 3)
|
|
|
|
# Draw the bottom row of trees
|
|
for x in range(65, SCREEN_WIDTH, 90):
|
|
draw_pine_tree(x, (SCREEN_HEIGHT / 3) - 120)
|
|
|
|
# Finish the render.
|
|
# Nothing will be drawn without this.
|
|
# Must happen after all draw commands
|
|
arcade.finish_render()
|
|
|
|
# Keep the window up until someone closes it.
|
|
arcade.run()
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|