🌌 EventHorizon-Java: 3D Black Hole Simulation

A real-time, 3D simulation of a supermassive black hole and its accretion disk, built from scratch using Java and the LibGDX game development framework.

(Note: Upload a screenshot of your sim named 'screenshot.png' to your repo for this image to appear)

• High-Count Particle System: Simulates 8,000+ individual particles using 3D Decals for optimized performance.
• Newtonian Physics: Implements gravity vector math ($F = G \frac{m_1 m_2}{r^2}$) to calculate orbital velocities and trajectories.
• Visual Effects:
  • Additive Blending: Creates the intense "white-hot" plasma effect where particle density is high.
  • Simulated Redshift: Particles dynamically change color from blue (cold/far) to red/white (hot/close) based on distance and velocity.
  • Procedural Textures: Glow textures are generated via code at runtime—no external assets required.
• Interactive Camera: Full 3D camera controls to explore the void from any angle.

• Language: Java
• Library: LibGDX (OpenGL wrapper)
• Rendering: 3D DecalBatch & ModelBatch
• Math: Vector3 cross products for orbital planes & relativistic clamping.

The simulation uses a simplified N-Body approach focused on a central massive attractor.

1. Gravity: Each frame, a centripetal force vector is calculated for every particle pointing toward the singularity $(0,0,0)$.
2. The Event Horizon: A Schwarzschild radius is defined. Any particle crossing this threshold is reset, simulating matter being consumed.
3. Relativistic Clamping: To prevent simulation instability, a "speed of light" (Max Speed) is enforced on all particles so they don't glitch through the event horizon.

1. Clone the repository:

   git clone [https://github.com/arvindverma63/EventHorizon-Java.git](https://github.com/arvindverma63/EventHorizon-Java.git)

2. Open the project:
   • Open in IntelliJ IDEA or Eclipse as a Gradle project.
3. Run:
   • Locate DesktopLauncher.java in the desktop/src/... folder.
   • Run the main method.

• Rotate Camera: Click & Drag Mouse
• Zoom: Scroll Wheel
• Speed: Press 1 (Normal), 2 (Fast), 3 (Ultra)
• Pause: Spacebar
• Exit: ESC

Created by Arvind Verma