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Rotating and moving a sprite in Pygame

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by vsasikalabe dot icon Updated: Apr 7, 2023

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The import pygame modules imports all modules in the pygame package. A sprite is used to display the 2D representation of the object on the screen. You must import the Sprite class from Pygame to create a basic sprite. Using this, we can define any attributes and methods of our game. 


To initialize all imported pygame modules pygame. init() is used. The super() function gives access to the methods and properties of a class. This function returns an object that represents the parent class. In pygame, creating surfaces is quite easy. We must apply the height and the width with a tuple to the pygame. The surface () method is used to create triangles and other shapes with the Polygon tool. Vector2 rotates the object by a given angle in radians. It calculates the angle to a given vector in degrees. The angle speed is assigned to zero. SELF defines the instance of the class. In Python, this keyword allows you to access a defined class's variables, attributes, and methods. 

The role of main function is to act as the starting point of execution for any software program In Python. The screen mode is displayed in the 1280 and 720 range. The events are applied to the sprite with key-up, key-down, key-left, and key-right. Instead of the entire area, the pygame.display.flip() allows only a portion of the screen to be updated. It updates the entire Surface area like a pygame.display.flip() if no argument is passed. 


Here is an example of how to rotate and move a Sprite in Pygame: 

Preview of the output that you will get on running this code from your IDE.

Code

In this solution, we used pygame library.

Rotating and moving a sprite in Pygame

PythondotLines of Code : 69dotLicense : Strong Copyleft (CC BY-SA 4.0)

Dependent Libraries : 
import math
import pygame as pg
from pygame.math import Vector2


class Player(pg.sprite.Sprite):

    def __init__(self, pos=(420, 420)):
        super(Player, self).__init__()
        self.image = pg.Surface((70, 50), pg.SRCALPHA)
        pg.draw.polygon(self.image, (50, 120, 180), ((0, 0), (0, 50), (70, 25)))
        self.original_image = self.image
        self.rect = self.image.get_rect(center=pos)
        self.position = Vector2(pos)
        self.direction = Vector2(1, 0)  # A unit vector pointing rightward.
        self.speed = 2
        self.angle_speed = 0
        self.angle = 0

    def update(self):
        if self.angle_speed != 0:
            # Rotate the direction vector and then the image.
            self.direction.rotate_ip(self.angle_speed)
            self.angle += self.angle_speed
            self.image = pg.transform.rotate(self.original_image, -self.angle)
            self.rect = self.image.get_rect(center=self.rect.center)
        # Update the position vector and the rect.
        self.position += self.direction * self.speed
        self.rect.center = self.position


def main():
    pg.init()
    screen = pg.display.set_mode((1280, 720))
    player = Player((420, 420))
    playersprite = pg.sprite.RenderPlain((player))

    clock = pg.time.Clock()
    done = False
    while not done:
        clock.tick(60)
        for event in pg.event.get():
            if event.type == pg.QUIT:
                done = True
            elif event.type == pg.KEYDOWN:
                if event.key == pg.K_UP:
                    player.speed += 1
                elif event.key == pg.K_DOWN:
                    player.speed -= 1
                elif event.key == pg.K_LEFT:
                    player.angle_speed = -4
                elif event.key == pg.K_RIGHT:
                    player.angle_speed = 4
            elif event.type == pg.KEYUP:
                if event.key == pg.K_LEFT:
                    player.angle_speed = 0
                elif event.key == pg.K_RIGHT:
                    player.angle_speed = 0

        playersprite.update()

        screen.fill((30, 30, 30))
        playersprite.draw(screen)
        pg.display.flip()

if __name__ == '__main__':
    main()
    pg.quit()

Instructions

Follow the steps carefully to get the output easily.

  1. Download and Install the PyCharm Community Edition on your computer.
  2. Open the terminal and install the required libraries with the following commands.
  3. Install pygame - pip install pygame.
  4. Create a new python file on your IDE.
  5. Copy the snippet using the 'copy' button and paste it into your python file.
  6. Run the current file to generate the output.


I hope you found this useful. I have added the link to dependent libraries, and version information in the following sections.


I found this code snippet by searching for ' Rotating and moving a sprite in Pygame ' in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created in PyCharm 2022.3.
  2. The solution is tested on Python 3.11.1
  3. pygame version- 2.3.0


Using this solution, we are able to rotate and move a sprite in Pygame with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to rotate and move a sprite in Pygame.

Dependent Libraries

PyGame-Learning-Environmentby ntasfi

Python doticonstar image 841 doticonVersion:Currentdoticon
License: Permissive (MIT)

PyGame Learning Environment (PLE) -- Reinforcement Learning Environment in Python.

Support
    Quality
      Security
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          Reuse

            PyGame-Learning-Environmentby ntasfi

            Python doticon star image 841 doticonVersion:Currentdoticon License: Permissive (MIT)

            PyGame Learning Environment (PLE) -- Reinforcement Learning Environment in Python.
            Support
              Quality
                Security
                  License
                    Reuse

                      If you do not have the pygame library that is required to run this code, you can install them by clicking on the above link.

                      You can search for any dependent library on kandi like pygame.

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