GAMEBOX CS 1111 NOVEMBER 2019 GAMEBOX - - PowerPoint PPT Presentation

GAMEBOX

CS 1111 NOVEMBER 2019

GAMEBOX

• https://cs1110.cs.virginia.edu/gamebox-summary.html
• Save gamebox.py into every folder that uses gamebox
• Gamebox is a simple game library built on top of Pygame
• It supports
• Animation
• Collision Detection
• Simply physics
• More

IMPORT STATEMENTS

• Always start with:

import pygame import gamebox camera = gamebox.Camera(800, 600) # you can change these # dimensions to change the window size

CLICKING_EXAMPLE.PY

• http://cs1110.cs.virginia.edu/files/cs1111_19fa/clicking_example.py
• Let’s take a look at some of the mechanisms:

TIME LOOP

• At the core of gamebox is the passage of time:

gamebox.timer_loop(30, tick)

• This tells gamebox to call the function “tick” 30 times per second.

def tick(keys):

• This defines the tick function to take in any pressed keys

TIME LOOP

if pygame.K_UP in keys:

• This detects if the “UP” arrow is being hit on the keyboard.
• List of keys: https://www.pygame.org/docs/ref/key.html

if camera.mouseclick:

• Detects if the mouse is pressed (could be true several times in a row)

camera.draw(logo)

• Draws the logo as it’s current stored location

camera.display()

• Draws everything the camera “drew”

CAMERA

Point of Origin (0,0) Y increases X increases

GAMEBOXES

• A gamebox is a rectangle
• You can draw images or color the rectangles
• They can move
• They support collision detection
• They can change appearance
• See 2. gameboxes on http://cs1110.cs.virginia.edu/gamebox-summary.html

GAMEBOXES MOVEMENT

b1 = gamebox.from_color(50, 100, "red", 20, 40) # x, y, color, width, height b1.move(5, 6) b1.x -= 5 b1.center(50, 100)

EXAMPLES – SIMPLE ANIMATION

• Starfield – Simple starfield animation

https://cs1110.cs.virginia.edu/files/cs1111_19fa/starfield.py

• Gangnam Style – Sprite images

https://cs1110.cs.virginia.edu/files/cs1111_19fa/animation.py

• Timer

https://cs1110.cs.virginia.edu/files/cs1111_19fa/pygame_demo.py

COLLISION DETECTION

print(b1.touches(b2))

• If b1 touches b2, return true

print(b1.bottom_touches(b2))

• If the bottom of b1 touches b2, return true

b1.move_to_stop_overlapping(b2) b1.move_both_to_stop_overlapping(b2)

EXAMPLES

• Arrow-Keys: [movement, images, keyboard controls]

https://cs1110.cs.virginia.edu/files/cs1111_19fa/arrow_keys.py

• Infinite_jumper: [movement, jumping, collision detection, panning]

https://cs1110.cs.virginia.edu/files/cs1111_19fa/infinite_jumper.py

• Healthbar: [rudimentary AI, health bar, game_over screen]

https://cs1110.cs.virginia.edu/files/cs1111_19fa/health_bar.py

• Basic Carry Demo (Carrying an item)

https://cs1110.cs.virginia.edu/files/cs1111_19fa/basic_carry_stuff.py