Marco Acea

Jonathan Perez

All code and credit goes to Ex TA Lukas Peraza

and the Pygame documentation!

First things first… what’s the difference?

• You’re all familiar with tkinter, think of pygame as a more object oriented tkinter!
• With Pygame you can represent images on the screen as an object… and the ‘canvas’ as an object… it’s really just a lot of objects.

Let’s take a look at some past projects!

Surfaces - Canvas, but make it fashion

• Surfaces are like a canvas in tkinter.
• The surface object has two important parameters:
• pygame.Surface((width,height ))
• There are two ways of adding color to a surface (let c be a surface we defined)
• c.fill(r,g,b) #Applies a rgb color to a surface
• c.blit(source,destination) #Source is another surface and destination is a pair of coordinates
• pygame.image.load(path) #makes a surface out of an image

Starter Code

Events

What does this look like in code?

• Note that event.type returns

what the event was, and we

we compare it to the events

we know about.

• All the keys in Pygame!

Drawing

• There are basic drawing methods like in tkinter that we can draw onto any surface. Images are drawn by using .blit like we mentioned before.

Drawing cont.

• Once you finish ‘drawing’ or ‘blit’-ing something, you have to update the screen.

Starter Code!

Ex-TA Lukas’ Starter Code!!!

Search for the subsection:

“Framework”

Sprites

• Sprites are by far one of the coolest parts of pygame, and really what sets it apart from tkinter!
• Sprites are objects in your game, think characters, that can be updated in batches, you can ‘kill’ them and check for collision between sprites!

How to use Sprites

• Extend the pygame.sprite.Sprite class (Think-

class Marco(pygame.sprite.Sprite): …

• Call the superclass's init method
• Create the update method
• Assign the rect, image, and optionally the radius attributes (for circular collision)

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Examples

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Groups

• A Group (pygame.sprite.Group) is an object which represents a collection of Sprites.
• You can use groups to update each sprite in the group at the same time, or to draw each sprite in the group at the same time.

Groups

• Here are some quick functions for the pygame.sprite.Group class

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• Learn about these function!

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Group Collide!

• pygame.sprite.groupcollide(group1,group2)
• This will find collisions between all the Sprites in two groups.
• Every Sprite inside group1 is added to the return dictionary. The value for each item is the list of Sprites in group2 that intersect.
• If either dokill argument is True, the colliding Sprites will be removed from their respective Group.
• The collided argument is a callback function used to calculate if two sprites are colliding.

Sprite Collision

• spritecollide(sprite, group, dokill, collided = None)
• Works like groupCollide()

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Animation Demo!