Optimize code for GPU scaling on 4090

.gitignore

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+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Testing
+.pytest_cache/
+.coverage
+htmlcov/
+.tox/
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Virtual environments
+venv/
+env/
+ENV/

4K_SETUP.md

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+# 🖥️ 4K Widescreen Setup Guide
+
+## Your System is Now Optimized for 4K!
+
+The default configuration has been set for **3840x2160 (4K UHD)** displays.
+
+---
+
+## Current 4K Settings ✅
+
+```python
+WINDOW_WIDTH = 3840
+WINDOW_HEIGHT = 2160
+GRID_SIZE = 4096        # 16.7M cells for crisp detail
+NUM_AGENTS = 10_000_000  # 10 million agents
+AGENT_SIZE = 0.6        # Smaller for better 4K detail
+FIELD_SAMPLES = 1000    # More samples for smoother patterns
+```
+
+### Memory Usage
+- **Estimated VRAM:** ~420 MB
+- **Leaves plenty of room** on your 24GB RTX 4090
+- You can scale up to 50M agents if you want!
+
+---
+
+## Quick Start
+
+### 1. Run with Default 4K Settings
+```bash
+python snail_trails_modular.py
+```
+
+This will run at **3840x2160** with **10 million agents** on a **4096x4096 grid**.
+
+### 2. Enable Fullscreen (Optional)
+Edit `config.py`:
+```python
+FULLSCREEN = True
+```
+
+---
+
+## Performance Expectations on RTX 4090
+
+| Configuration | Agents | Grid | Expected FPS | VRAM |
+|---------------|--------|------|--------------|------|
+| **Current (4K)** | 10M | 4096² | 60+ | ~420 MB |
+| 4K Ultra | 20M | 4096² | 45+ | ~840 MB |
+| 4K Extreme | 50M | 4096² | 20-30 | ~1.9 GB |
+
+---
+
+## Visual Quality Improvements for 4K
+
+### Smaller Agents = More Detail
+```python
+AGENT_SIZE = 0.6  # Default
+AGENT_SIZE = 0.5  # Even more detail
+AGENT_SIZE = 0.4  # Maximum detail (tiny agents)
+```
+
+### More Field Samples = Smoother Patterns
+```python
+FIELD_SAMPLES = 1000  # Default (good balance)
+FIELD_SAMPLES = 2000  # Ultra smooth (slower field gen)
+```
+
+### Higher Grid Resolution = Sharper Simulation
+```python
+GRID_SIZE = 4096  # Default (16.7M cells)
+# This is already optimal for 4K!
+```
+
+---
+
+## Presets for Different Scenarios
+
+### Testing / Debugging
+```python
+# Quick Test preset (uncomment in config.py)
+GRID_SIZE = 512
+NUM_AGENTS = 100_000
+WINDOW_WIDTH = 1280
+WINDOW_HEIGHT = 720
+```
+
+### Maximum Visual Quality
+```python
+# 4K Ultra preset (uncomment in config.py)
+GRID_SIZE = 4096
+NUM_AGENTS = 20_000_000
+WINDOW_WIDTH = 3840
+WINDOW_HEIGHT = 2160
+AGENT_SIZE = 0.5
+FIELD_SAMPLES = 2000
+```
+
+### Stress Test Your GPU
+```python
+# Extreme Scale preset (uncomment in config.py)
+GRID_SIZE = 4096
+NUM_AGENTS = 50_000_000
+WINDOW_WIDTH = 3840
+WINDOW_HEIGHT = 2160
+AGENT_SIZE = 0.5
+```
+
+---
+
+## 4K-Specific Tips
+
+### 1. Fullscreen Looks Amazing
+```python
+FULLSCREEN = True  # Immersive experience
+```
+
+### 2. Adjust Agent Size to Preference
+```python
+AGENT_SIZE = 0.7  # Bigger agents (easier to see)
+AGENT_SIZE = 0.5  # Smaller agents (more detail, prettier)
+```
+
+### 3. Color Modes Look Great at 4K
+The default `velocity` mode creates beautiful rainbow patterns that really pop on 4K displays.
+
+### 4. VSync for Smooth Visuals
+```python
+VSYNC = True  # Recommended (prevents tearing)
+```
+
+---
+
+## Troubleshooting 4K Issues
+
+### Window Too Large?
+If 4K fills your whole screen uncomfortably:
+```python
+# Use 1440p instead
+WINDOW_WIDTH = 2560
+WINDOW_HEIGHT = 1440
+GRID_SIZE = 2048
+AGENT_SIZE = 0.7
+```
+
+### Performance Lower Than Expected?
+```python
+# Reduce agent count
+NUM_AGENTS = 5_000_000  # 5M instead of 10M
+
+# Or reduce grid size
+GRID_SIZE = 2048  # Still looks great
+```
+
+### Agents Too Small?
+```python
+AGENT_SIZE = 0.8  # Increase from default 0.6
+```
+
+---
+
+## Comparison: 1080p vs 4K
+
+| Setting | 1080p | 4K | Difference |
+|---------|-------|-----|------------|
+| Resolution | 1920x1080 | 3840x2160 | **4x pixels** |
+| Recommended Grid | 2048x2048 | 4096x4096 | **4x cells** |
+| Agent Size | 0.8 | 0.6 | Smaller for detail |
+| Field Samples | 500 | 1000 | Smoother patterns |
+| Visual Quality | Great | **Stunning** | More detail |
+
+---
+
+## Why These Settings?
+
+### 4096x4096 Grid
+- **Perfect match** for 4K resolution
+- Each pixel can map cleanly to grid cells
+- Prevents aliasing and pixelation
+- Crisp, clean edges
+
+### 10M Agents
+- **Sweet spot** for 4K displays
+- Dense enough to look good
+- Fast enough to maintain 60 FPS
+- Leaves room to scale up
+
+### 0.6 Agent Size
+- **Better visibility** of individual agents
+- More "breathing room" between agents
+- Cleaner visual appearance
+- Shows patterns more clearly
+
+### 1000 Field Samples
+- **Smoother vector fields**
+- More detailed patterns
+- Better visual quality at 4K
+- Still fast on RTX 4090
+
+---
+
+## Monitor Recommendations
+
+### 4K UHD (3840x2160) ✅
+Perfect! Default settings are optimized for you.
+
+### 4K UltraWide (5120x2160 or 3440x1440)
+Adjust aspect ratio:
+```python
+# For 21:9 ultrawide
+WINDOW_WIDTH = 3440
+WINDOW_HEIGHT = 1440
+GRID_SIZE = 3440  # Match width for best results
+```
+
+### 1440p (2560x1440)
+Still great! Use this preset:
+```python
+WINDOW_WIDTH = 2560
+WINDOW_HEIGHT = 1440
+GRID_SIZE = 2560
+AGENT_SIZE = 0.7
+FIELD_SAMPLES = 750
+```
+
+---
+
+## Performance Monitoring
+
+Watch the window title for FPS:
+```
+Snail Trails GPU - 10,000,000 Agents | FPS: 62.3
+```
+
+### What to Expect:
+- **60+ FPS** - Perfect! ✅
+- **45-60 FPS** - Still smooth
+- **30-45 FPS** - Playable, consider reducing agents
+- **< 30 FPS** - Reduce NUM_AGENTS or GRID_SIZE
+
+---
+
+## Advanced: Custom Resolutions
+
+### For Any Resolution:
+```python
+# Match grid size to width for best results
+WINDOW_WIDTH = your_width
+WINDOW_HEIGHT = your_height
+GRID_SIZE = your_width  # Or closest power of 2
+
+# Adjust agent size based on resolution
+# Higher res = smaller agents
+AGENT_SIZE = 0.8 - (your_width / 10000)  # Rule of thumb
+```
+
+---
+
+## Enjoy the Show! 🎮
+
+Your RTX 4090 with a 4K display is the **perfect setup** for this simulation. You'll see incredible detail and smooth performance with 10 million agents!
+
+**Pro tip:** Try fullscreen mode in a dark room for the best experience! 🌌
+
+---
+
+## Quick Reference
+
+```bash
+# Run simulation
+python snail_trails_modular.py
+
+# Enable fullscreen (edit config.py first)
+FULLSCREEN = True
+
+# Test different scales
+# Edit NUM_AGENTS in config.py:
+# 5M, 10M, 20M, 50M agents
+
+# Adjust visual detail
+# Edit AGENT_SIZE in config.py:
+# 0.4 (tiny), 0.6 (default), 0.8 (big)
+```