How to Rotate an Image Around Its Center Using Pygame?

How do I rotate an image around its center using Pygame?

Short Answer:

To rotate an image while preserving its center and size using Pygame, adjust the rectangle dimensions appropriately. Get the original image rectangle, and create a rotated image using pygame.transform.rotate(). Copy a portion of the rotated image that aligns with the original rectangle and use it as the output.

Detailed Answer:

When rotating an image using pygame.transform.rotate(), the resulting image's size increases. To maintain the original size, it's necessary to place the rotated image in the same location as the original image.

Here's an updated code block that addresses the exception:

def rot_center(image, angle, x, y):
    """Rotate an image while keeping its center and size"""
    rotated_image = pygame.transform.rotate(image, angle)
    new_rect = rotated_image.get_rect(center=image.get_rect(center=(x, y)).center)

    return rotated_image, new_rect

This function returns the rotated image and the bounding rectangle of the rotated image.

Alternatively, you can use the blitRotateCenter() function to rotate and blit the image:

def blitRotateCenter(surf, image, topleft, angle):
    rotated_image = pygame.transform.rotate(image, angle)
    new_rect = rotated_image.get_rect(center=image.get_rect(topleft=topleft).center)
    surf.blit(rotated_image, new_rect)

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