starting procedural generation

TODO.md

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+# TODO List for a Minecraft-Like Terrain Generator in Rust
+
+## 1. Define Objectives and Requirements
+- **Features:**
+  - Global terrain generation (overall elevation)
+  - Local detail (surface variations)
+  - Biome transitions and optionally cave systems
+- **Technical Constraints:**
+  - Chunk dimensions (e.g., 16×16 blocks horizontally with a fixed vertical height)
+  - Memory management (chunk caching, on-demand generation)
+  - Server integration (protocol, networking, etc.)
+- **Output Format:**
+  - How to represent the world (e.g., a 3D array of block types)
+  - Block types (Air, Grass, Dirt, Stone, Water, etc.)
+
+## 2. Research and Select Noise Algorithms
+- Study noise algorithms such as Perlin and Simplex.
+- Understand Fractal Brownian Motion (fBm) to combine multiple octaves.
+- Define parameters like frequency, amplitude, persistence, number of octaves, and scaling factors.
+
+## 3. Set Up Your Rust Project
+- Create a new project with Cargo.
+- Add necessary dependencies in `Cargo.toml` (e.g., the `noise` crate).
+- Set up version control (Git).
+
+## 4. Implement Basic Noise Generation
+- Write a simple prototype to generate noise values.
+- Use a scaling factor to avoid sampling only on integer coordinates.
+- Test with a fixed seed for reproducibility.
+
+## 5. Implement Fractal Brownian Motion (fBm)
+- Create a function to combine multiple noise octaves.
+- Adjust parameters (octaves, persistence, etc.) and test the results.
+
+## 6. Map Noise to Terrain Height
+- Convert normalized noise values (e.g., from -1 to 1) to block heights.
+- Define a mapping strategy (for example, scaling to a maximum height).
+
+## 7. Design the Chunk Data Structure
+- Decide on chunk dimensions (e.g., 16×16×128).
+- Create a simple structure to represent blocks (using enums or similar).
+
+## 8. Generate Chunks Based on Noise
+- For each (x, z) coordinate in a chunk:
+  - Calculate the noise value.
+  - Map it to a terrain height.
+  - Fill in blocks based on the height (e.g., surface, sub-surface, stone).
+- Keep the code modular and avoid overcomplicating early on.
+
+## 9. Test and Visualize the Generated Terrain
+- Write unit tests for noise functions and terrain mapping.
+- Create a simple visualization (e.g., a 2D height map printed to the console or exporting data for external tools).
+- Verify that parameter adjustments produce the expected variations.
+
+## 10. Integrate the Generator into Your Server Architecture
+- Implement on-demand chunk generation as the player moves.
+- Cache generated chunks (in memory or on disk) to avoid re-computation.
+- Consider multithreading or asynchronous processing for parallel generation.
+
+## 11. Optimize and Refine
+- Profile the terrain generation for performance bottlenecks.
+- Fine-tune noise parameters and mapping logic.
+- Plan future enhancements (biomes, caves, advanced block types).
+
+## 12. Document and Maintain the Codebase
+- Document your functions, parameters, and overall architecture.
+- Use version control to track changes and manage iterative improvements.
+- Keep your code modular for easy future enhancements.
+