Remove binary star config and update documentation

- Deleted: configs/example_binary_star.toml
- Updated README.md: removed binary star references, fixed broken doc link
- Updated implementation_plan.md: removed binary star references, added single-root constraint

Documentation now reflects single root body constraint

README.md

@@ -6,7 +6,7 @@ A 3D orbital mechanics simulation using a 2-body gravitational model with sphere
 
 - 2-body gravitational physics with SOI transitions
 - Configurable star systems via toml files
-- Solar system and binary star example configurations
+- Solar system example configurations
 
 ## Getting Started
 
@@ -38,13 +38,11 @@ make clean-all    # Clean everything including raylib
 
 ```bash
 ./orbit_sim       # Run with the default solar system configuration
-./orbit_sim configs/example_binary_star.toml    # Run with a custom configuration file:
 ```
 
 ## Documentation
 
 - **[Technical Reference](docs/implementation_plan.md)** - Data structures and module overview
-- **[Detailed Architecture](docs/verbose_project_overview.md)** - Complete implementation details and data flow
 
 ## Testing
 

configs/example_binary_star.toml

@@ -1,62 +0,0 @@
-# Binary Star System with Planets
-# A simple example of two stars orbiting each other with planets around them
-
-[[bodies]]
-name = "StarA"
-mass = 1.5e30
-radius = 8.0e8
-position = { x = 3.0e11, y = 0.0, z = 0.0 }
-parent_index = -1
-color = { r = 1.0, g = 1.0, b = 0.2 }
-eccentricity = 0.0
-semi_major_axis = 0.0
-
-[[bodies]]
-name = "StarB"
-mass = 1.2e30
-radius = 7.0e8
-position = { x = -3.7e11, y = 0.0, z = 0.0 }
-parent_index = -1
-color = { r = 0.3, g = 0.5, b = 1.0 }
-eccentricity = 0.0
-semi_major_axis = 0.0
-
-[[bodies]]
-name = "PlanetA1"
-mass = 6.0e24
-radius = 7.0e6
-position = { x = 3.5e11, y = 0.0, z = 0.0 }
-parent_index = 0
-color = { r = 0.8, g = 0.3, b = 0.2 }
-eccentricity = 0.0
-semi_major_axis = 3.5e11
-
-[[bodies]]
-name = "PlanetB1"
-mass = 4.0e24
-radius = 6.0e6
-position = { x = -4.2e11, y = 0.0, z = 0.0 }
-parent_index = 1
-color = { r = 0.2, g = 0.8, b = 0.6 }
-eccentricity = 0.0
-semi_major_axis = 4.2e11
-
-[[bodies]]
-name = "MoonA1"
-mass = 1.0e23
-radius = 2.0e6
-position = { x = 3.52e11, y = 0.0, z = 0.0 }
-parent_index = 2
-color = { r = 0.7, g = 0.7, b = 0.7 }
-eccentricity = 0.0
-semi_major_axis = 3.52e11
-
-[[bodies]]
-name = "PlanetA2"
-mass = 8.0e24
-radius = 8.0e6
-position = { x = 4.0e11, y = 0.0, z = 0.0 }
-parent_index = 0
-color = { r = 0.5, g = 0.6, b = 0.3 }
-eccentricity = 0.0
-semi_major_axis = 4.0e11

docs/implementation_plan.md

@@ -8,6 +8,7 @@
 - RK4 (Runge-Kutta 4th order) integration for physics
 - Simple rotations (quaternions deferred)
 - raylib for 3D visualization
+- Single root body systems only (parent_index = -1 for exactly one body)
 
 ## Core Data Structures
 
@@ -102,8 +103,7 @@ TOML-based config parser using tomlc17 library. Auto-calculates circular orbit v
 **Config format details:**
 - TOML array of tables: `[[bodies]]`
 - Comments start with `#`
-- `parent_index = -1` indicates root bodies (stars)
-- Supports binary/multiple star systems with barycentric orbit calculation
+- `parent_index = -1` indicates root body (star)
 
 **Config format (TOML):**
 ```toml
@@ -173,12 +173,11 @@ GUI-only application with interactive 3D visualization.
 - Phase 1-4: Core physics, simulation, config loading, and rendering
 - Raylib integration with 3D camera
 - Distance and size scaling for visualization
-- TOML config file system with solar_system.toml, example_binary_star.toml, test_simple.toml
+- TOML config file system with solar_system.toml and test_simple.toml
 - RK4 (Runge-Kutta 4th order) integration for improved accuracy
 - Time scaling controls (speed up/slow down simulation)
 - Pause/resume functionality
 - Orbital elements calculation
-- Binary/multiple star system support with barycentric orbits
 
 ### 🔨 Remaining/Future Work
 - More accurate integration methods (Newton-Raphson propagation)