Pygame Animations

This code allows you to add smooth movement and scaling to pygame surfaces. Mostly all the animation types require a duration (in seconds) and a function (if you dont want to use the default function).

Requirements

• python3

• pygame 1.9.5

• easings.py

• Animations.py

Floating Animation (Float)

This animation runs indefinitely and adds a floating effect to the surface.

Arguments :

__init__(surface_rectangle , magnitude , axis , duration , function = inOutCubic)

• magnitude is the number of pixels the surface travels on the screen.

• axis is either "x" or "y".

• duration is always in seconds. Its the time taken to complete once cycle.

• function is the easing-function imported from easings.py and set to default as inOutCubic

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Float.start_float()

• It returns a new value according to the axis passed and it must assigned to surface_rect.x or surface_rect.y in the main pygame loop.

Example

import pygame
from Animations import Float
import sys

pygame.init()

Screen = pygame.display.set_mode((700, 700))
fps = pygame.time.Clock()
frames = 60


surface = pygame.Surface((150, 150))
surface_rect = surface.get_rect(x=0, y=250)
surface.fill(pygame.Color("green"))

surface_floater = Float(surface_rect, 550, "x", 3)
time_list = [surface_floater]

while True:
    Screen.fill(pygame.Color("black"))
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    for element in time_list:
        element.time += 1 / frames

    surface_rect.x = surface_floater.start_float()
    Screen.blit(surface, surface_rect)

    pygame.display.update()

    fps.tick(frames)

Smooth Movement (Move)

This animation moves the surface to a desired position.

Arguments:

__init__(surface_rectangle , duration , function = inOutCubic)

• duration is the time taken to move the surface from its old position to the new_position.

• function is the easing-function imported from easings.py and set to default as inOutCubic.

---

Move.moveto(new_position)

• new_position must be a list having [new_xpos , new_ypos].

• The function must be called inside the main loop.

Example

import pygame
from Animations import Move
import sys

pygame.init()

Screen = pygame.display.set_mode((700, 700))
fps = pygame.time.Clock()
frames = 60

surface = pygame.Surface((150, 150))
surface_rect = surface.get_rect(x=250, y=250)
surface.fill(pygame.Color("green"))

surface_mover = Move(surface_rect, 5)
time_list = [surface_mover]

while True:
    Screen.fill(pygame.Color("black"))
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    for element in time_list:
        element.time += 1 / frames

    surface_mover.moveto([500, 250])
    Screen.blit(surface, surface_rect)

    pygame.display.update()
    fps.tick(frames)

Smooth Scale (SmoothScale)

This animation scales the surface to a new [height , width]. It can be more or less than the original size.

Arguments

__init__(surface , new_size , duration , function = inOutCubic)

• new_size must be a list/tuple having new height , width

• duration is the time taken to scale the the surface to its new_size

• function is the easing-function imported from easings.py and set to default as inOutCubic.

---

SmoothScale.give_surface()

• It must be called in the main loop.
• It returns a new surface with new_size

---

Example

import pygame
from Animations import SmoothScale
import sys

pygame.init()

Screen = pygame.display.set_mode((700, 700))
fps = pygame.time.Clock()
frames = 60

surface = pygame.Surface((150, 150))
surface_rect = surface.get_rect(x=250, y=250)
surface.fill(pygame.Color("green"))

surface_scaler = SmoothScale(surface, [300, 300], 5)
time_list = [surface_scaler]
while True:
    Screen.fill(pygame.Color("black"))
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    for element in time_list:
        element.time += 1 / frames

    surface = surface_scaler.give_surface()
    Screen.blit(surface, surface_rect)

    pygame.display.update()
    fps.tick(frames)

Change Color (Colorshift)

This animation allows you to change color slowly , reverse it and repeat it.

Arguments

__init__(starting_color , ending_color , rate , reverse = False , repeat = False)

• starting_color is the initial color/ the color you want to start with.

• ending_color is the final color which will be returned.

• Both the colors must be either in R,G,B format.

• rate is directly proportional to the time taken to complete 1 cycle of this animation. It must be +ve value.

---

Colorshift.changecolor()

• It must be called in the main loop
• It returns a new color.

---

Example

import pygame
from Animations import Colorshift
import sys

pygame.init()

Screen = pygame.display.set_mode((700, 700))
fps = pygame.time.Clock()
frames = 60

surface = pygame.Surface((150, 150))
surface_rect = surface.get_rect(x=250, y=250)
surface.fill(pygame.Color("green"))

color = Colorshift(pygame.Color("red"), pygame.Color("white"), 3, True, True)

while True:
    Screen.fill(pygame.Color("black"))
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    surface.fill(color.changecolor())
    Screen.blit(surface, surface_rect)

    pygame.display.update()
    fps.tick(frames)

Particle Generators (Particles)

This generates particles at the position passed in.

Arguments

__init__(render_surface)

• render_surface is the surface you want to generate the particles on.

Particles.append_particles(position , velocity , radius , color , rate)

• position is the x,y coordinates for a particle.
• velocity is the direction and speed at which the particles are headed.
• radius defines the size of the particle.
• color is the color for the particles
• rate defines how fast or slow the particles disappear
• The function must be called in the main loop

Particles.make_particles()

• Blits the particles onto the screen
• The function must be called in the main loop

---

Example

import pygame
from Animations import Particles
import sys
import random

pygame.init()

Screen = pygame.display.set_mode((700, 700))
fps = pygame.time.Clock()
frames = 60

Particle_gen = Particles(Screen)
while True:
    Screen.fill(pygame.Color("black"))

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    Particle_gen.append_particles(
        [350, 550],
        [random.randint(0, 60) / 10 - 2, -1 * random.randint(0, 100) / 10 - 1],
        25,
        0.2,
        pygame.Color("green"),
    )
    Particle_gen.make_particles()

    pygame.display.update()
    fps.tick(frames)