Diamond Square

Implementation of the Diamond–Square Algorithm. This package can draw terrain on pgzero and pygame, and can also set up interactive mode for.

Sample Generations

⚠️ You MUST include all four interactive functions for pgzero interactive

Missing even one will cause failures or unpredictable behavior.

⚠️ You must pass the pgzero screen into draw functions

Use terrain.draw(screen) or terrain.for_draw(screen) — the yellow underline is expected.

Table of Contents

• Why Use Diamond Square?
• Usage
  • Drawing Terrain
    • Pgzero Example
    • Pygame Example
  • Interactive Mode
    • Pgzero Example
    • Pygame Example
• Requirements for Pgzero Interactive
• Versions
• Coming Soon

Why Use diamond-square?

This package provides a complete implementation of the Diamond–Square algorithm with:

• Fast rendering of the Diamond-Square algorithm written in C.

• Multiple built‑in biomes.

• Adjustable roughness and scale.

• Support for pgzero and pygame.

• Optional interactive mode.

• The ability to save generated terrain as an image.

• Functions to add or remove biomes dynamically.

It is designed for both experimentation and game development, making terrain generation simple and customizable.

Usage

Drawing Terrain

Pgzero Example

Look at sample_code_pgzero_drawing_terrain.py for pgzero examples.

Pygame Example

Look at sample_code_pygame_drawing_terrain.py for pygame examples.

The screen parameter must be the pygame display surface.

Interactive Mode

This creates an interactive scene where the user can change the biome and roughness in real time.

Pgzero example

Look at sample_code_pgzero_drawing_terrain.py for pgzero examples.

Pygame example

Look at sample_code_pygame_drawing_terrain.py for pygame examples.

Requirements for Pgzero Interactive

For Pgzero Interative Mode, it requires all four of the following functions to be placed in their corresponding pgzero event handlers:

terrain.for_draw(screen)
terrain.for_on_mouse_down(pos)
terrain.for_on_mouse_up()
terrain.for_on_mouse_move(pos)

If any one of these is missing, the interactive mode will:

• fail to update correctly
• behave unpredictably
• or stop working entirely

These must be placed in:

• draw() → terrain.for_draw(screen)
• on_mouse_down(pos) → terrain.for_on_mouse_down(pos)
• on_mouse_up() → terrain.for_on_mouse_up()
• on_mouse_move(pos) → terrain.for_on_mouse_move(pos)

Versions

Version 0.0.1: Main code for diamond-square added.

Version 0.0.2: Updated README file and added documentation.

Version 0.0.3: Fixed bugs and errors.

Version 0.0.4: Added sample terrain.

Version 0.0.5: Added more sample terrains.

Version 0.0.6: Added functions to add/remove biomes.

Version 0.0.7: Added pos parameter to determine where to place the terrain and added function to save terrain as an image. Also made interative mode avaliable to pgzero.

Version 0.0.8: Added C file for fast rendering of the Diamond–Square Algorithm.

Version 0.0.9: Made pgzero and pygame interactive mode into one function and added documentation.

Version 0.1.0: Fix bugs in C file and save_terrain function.

Version 0.1.1: Refactor Code for more OOP.

Version 0.1.2: Add documentation.

Version 0.1.3: Complete documentation, fix bugs, and remove duplicate functions.

Version 0.1.4: Bug fixes.

(Latest) Version 0.1.5: Bug fixes, documentation changes, added utils.py, and updated sample code files.

Coming Soon

Version 0.1.6: Complete documentation. Version 0.1.7: Add re-generate button for interactive mode pgzero and pygame.