obsidian/MyObsidianVault/Knowledgebase/Godot/2D/Texture Atlas generation/Just use a custom pygame script.md

import pygame
import os

def create_spritesheet(image_paths, output_path, rows=1, padding=0):
    """
    Combine multiple images into a single spritesheet.
    
    Args:
        image_paths (list): List of paths to source images
        output_path (str): Path to save the combined spritesheet
        rows (int): Number of rows in the spritesheet
        padding (int): Pixel padding between images
    """
    if not image_paths:
        raise ValueError("No images provided")
    
    # Load all images
    images = []
    max_width = 0
    max_height = 0
    
    for path in image_paths:
        try:
            img = pygame.image.load(path)#.convert_alpha()
            images.append(img)
            max_width = max(max_width, img.get_width())
            max_height = max(max_height, img.get_height())
        except pygame.error as e:
            print(f"Failed to load {path}: {e}")
            continue
    
    if not images:
        raise ValueError("No valid images loaded")
    
    # Calculate spritesheet dimensions
    cols = (len(images) + rows - 1) // rows
    sheet_width = cols * (max_width + padding) - padding
    sheet_height = rows * (max_height + padding) - padding
    
    # Create blank spritesheet surface
    spritesheet = pygame.Surface((sheet_width, sheet_height), pygame.SRCALPHA)
    
    # Blit images onto spritesheet
    for i, img in enumerate(images):
        row = i // cols
        col = i % cols
        x = col * (max_width + padding)
        y = row * (max_height + padding)
        spritesheet.blit(img, (x, y))
    
    # Save the spritesheet
    pygame.image.save(spritesheet, output_path)
    print(f"Spritesheet saved to {output_path}")


pygame.init()

filenames = os.listdir("./tiles")
os.chdir("tiles")

# List of image paths to combine
image_files = filenames

cols=8
rows=len(image_files)//cols + 1
print(f"cols: {cols}, rows: {rows}")

## Create and save spritesheet
create_spritesheet(image_files, "../spritesheet/combined_spritesheet.png", rows, padding=1)

os.chdir("..")

## Create+Store metadata
mapping = ["x_col,y_col,tilename"]

for index, filename in enumerate(image_files):
    x_col = index // cols
    y_row = index - x_col * cols
    print(f"{index} - [{x_col},{y_row}] -> {filename}")
    tilename = filename.split(".")[0]
    mapping.append(  f"{x_col},{y_row},{tilename}" )

print("Wrote spritesheet/combined_spritesheet.png")

f = open("mapping.txt","w")
f.write("\n".join(mapping))
f.close()