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144 | """
This simple animation example shows how to use classes to animate
multiple objects on the screen at the same time.
Note: Sprites draw much faster than drawing primitives
If Python and Arcade are installed, this example can be run from the command line with:
python -m arcade.examples.shapes
"""
import arcade
import random
# Set up the constants
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
SCREEN_TITLE = "Shapes!"
NUMBER_OF_SHAPES = 500
class Shape:
""" Generic base shape class """
def __init__(self, x, y, width, height, angle, delta_x, delta_y,
delta_angle, color):
self.x = x
self.y = y
self.width = width
self.height = height
self.angle = angle
self.delta_x = delta_x
self.delta_y = delta_y
self.delta_angle = delta_angle
self.color = color
def move(self):
self.x += self.delta_x
self.y += self.delta_y
self.angle += self.delta_angle
if self.x < 0 and self.delta_x < 0:
self.delta_x *= -1
if self.y < 0 and self.delta_y < 0:
self.delta_y *= -1
if self.x > SCREEN_WIDTH and self.delta_x > 0:
self.delta_x *= -1
if self.y > SCREEN_HEIGHT and self.delta_y > 0:
self.delta_y *= -1
class Ellipse(Shape):
def draw(self):
arcade.draw_ellipse_filled(self.x, self.y, self.width, self.height,
self.color, self.angle)
class Rectangle(Shape):
def draw(self):
arcade.draw_rectangle_filled(self.x, self.y, self.width, self.height,
self.color, self.angle)
class Line(Shape):
def draw(self):
arcade.draw_line(self.x, self.y,
self.x + self.width, self.y + self.height,
self.color, 2)
class MyGame(arcade.Window):
""" Main application class. """
def __init__(self):
# Call the parent __init__
super().__init__(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
# Create a shape list
self.shape_list = []
for i in range(NUMBER_OF_SHAPES):
# Random spot
x = random.randrange(0, SCREEN_WIDTH)
y = random.randrange(0, SCREEN_HEIGHT)
# Random size
width = random.randrange(15, 40)
height = random.randrange(15, 40)
# Random angle
angle = random.randrange(0, 360)
# Random movement
d_x = random.randrange(-3, 4)
d_y = random.randrange(-3, 4)
d_angle = random.randrange(-3, 4)
# Random color
red = random.randrange(256)
green = random.randrange(256)
blue = random.randrange(256)
alpha = random.randrange(256)
# Random line, ellipse, or rect
shape_type = random.randrange(3)
if shape_type == 0:
shape = Rectangle(x, y, width, height, angle, d_x, d_y,
d_angle, (red, green, blue, alpha))
elif shape_type == 1:
shape = Ellipse(x, y, width, height, angle, d_x, d_y,
d_angle, (red, green, blue, alpha))
else:
shape = Line(x, y, width, height, angle, d_x, d_y,
d_angle, (red, green, blue, alpha))
# Add this new shape to the list
self.shape_list.append(shape)
def on_update(self, dt):
""" Move everything """
for shape in self.shape_list:
shape.move()
def on_draw(self):
""" Render the screen. """
# Clear teh screen
self.clear()
# Draw the shapes
for shape in self.shape_list:
shape.draw()
def main():
MyGame()
arcade.run()
if __name__ == "__main__":
main()
|