Draw Tree Function

Goals

• Draw a tree

• Draw two trees

• Reference every position to single (x, y) point

• Define the draw_tree function

• Vary the y position. Need to create a list outside the game loop.

Starter code

• Pygame Template

What you need to do

• Make a blue background

• Move the trees down and draw a single cloud (composed of multiple circles)

• Extract an x and y coordinate for the cloud and have every circle reference that point.

• Define a draw_cloud function that takes an x and y value.

• Draw multiple clouds in the sky

• Create a list for the cloud locations. And use this list to draw the clouds (with a for loop).

• In the game updates section, loop through the cloud locations and update only the x component (+= 3). Also in this loop, to prevent the clouds from traveling too far off screen, reset the x position if it goes too far.

Final Code

import random

import pygame
from pygame.locals import K_ESCAPE, KEYDOWN, QUIT


def draw_tree(x: int, y: int):
    pygame.draw.rect(screen, (150,75,0), (x, y, 25, 150))          # trunk
    pygame.draw.circle(screen, (0, 175, 0), (x + 12, y - 50), 75)  # leaves


pygame.init()

WIDTH = 640
HEIGHT = 480
SIZE = (WIDTH, HEIGHT)

screen = pygame.display.set_mode(SIZE)
clock = pygame.time.Clock()

# ---------------------------
# Initialize global variables

tree_locations = []

for x in range(50, WIDTH, 50):
    y = 200 + random.randrange(-20, 20)
    location = [x, y]
    tree_locations.append(location)

# ---------------------------

running = True
while running:
    # EVENT HANDLING
    for event in pygame.event.get():
        if event.type == KEYDOWN:
            if event.key == K_ESCAPE:
                running = False
        elif event.type == QUIT:
            running = False

    # GAME STATE UPDATES

    # DRAWING
    screen.fill((255, 255, 255))  # always the first drawing command


    for location in tree_locations:
        x = location[0]
        y = location[1]

        draw_tree(x, y)


    # Must be the last two lines
    # of the game loop
    pygame.display.flip()
    clock.tick(30)
    #---------------------------


pygame.quit()