@MrParrot

# Event Horizon — a gravity sandbox

A live, in-browser simulation of gravity around a black hole, built with plain HTML and python 3. No build step, no dependencies — just open the file.

**[Try it live →](https://blackholesimulator1710.netlify.app/)** (recomended, way easier then the file!)

## What it does

Event Horizon models Newtonian gravity (not full general relativity) to let you drop matter, launch planets, and spawn extra gravitational bodies into a warped spacetime grid. Watch matter get consumed, planets stretch as they approach the event horizon, and light rays bend as they pass close to mass.

## Features

- **Two body types** — black holes (swallow anything that crosses the event horizon) and neutron stars (matter sticks to their surface and grows their mass; enough accreted mass causes a collapse into a black hole)
- **Mutual gravity** — toggle it on and every body pulls on every other one, including merging on collision
- **Vector spawning** — click and drag to set the launch direction and speed of anything you place, instead of just dropping it at rest
- **Preset scenarios** — Single hole, Binary black holes, Hole + neutron star, and Three-body chaos
- **Pause and time-speed controls** — slow down or freeze the simulation to study a moment
- **Live telemetry** — matter count, light-ray count, FPS, and closest approach to a body

## Controls

| Action | Effect |
|---|---|
| Click / tap | Drop the selected body at rest |
| Click + drag | Set a launch vector (direction + speed) |
| Shift + click | Launch a planet (desktop) |
| Ctrl + click | Spawn a black hole (desktop) |
| Right-click a body | Delete it |
| Right-click empty space | Lock / unlock the primary hole |
| Scroll | Adjust the primary hole's mass |

## Tech

Python 3 using for the physics and main brain
HTML to make it look good and a site
Netlify for the site upload

## Notes

This uses a simplified Newtonian gravity model (inverse-square law) rather than true general relativity — it's a fun approximation, not a physically accurate spacetime simulator. Built with some help from Claude for the physics-to-visuals translation and UI polish.

ROCKET SIMULATOR
----------------

A python simulator that allows you to design your own rocket by values and simulate it's take off and fall back down using basic physics.

Features

build a custom rocket and choose:
---------------------------------

-rocket weight
-fuel mass
-rocket diameter
-engine thrust
-fuel burn rate
-payload mass
-engine thrust

simulates:
----------

-gravity
-thrust
-fuel consumption
-air resistance
- Acceleration
- velocity
- altitude

bonus:
------
-summery after the flight
-and telematry graphs using tinker

How It Works
------------

The program guides the user through designing a rocket.

After entering all rocket parameters, the simulator calculates the flight second-by-second using physics equations.

At the end of the simulation, graphs display:

- Altitude vs Time
- Acceleration vs Time
- Fuel Remaining vs Time

Requirements
------------

- Python 3.x
- Tkinter
IMPORTENT: WITHOUT TINKER AND PYTHON.3 THE PROGRAM WILL CRASH

Run
---

```bash
python rocket_simulator.py
```

Example
-------

1. Build your rocket.
2. Enter launch code '1710'.
3. Watch the simulation.
4. Analyze the flight results and graphs.

Technologies
------------

- Python
- Tkinter
- Math

Author
------

Created by MrParrot814 [Jonathan-Rich]

Project Status
---------------
First major programming project built for Hack Club StarDance.
- Physics Simulation

✅ Shipped