HelioSim

A real-time, WebAssembly-powered N-body gravitational system simulator built with C++, OpenGL ES 3.0, GLFW, and Emscripten running directly in your browser. Its features include predicitve orbit trails, collision, time controls and body spawning.

Live demo

Controls

Action	Description
Left Drag	Orbit camera
Scroll/Pinch	Zoom in/out
Shift/Two-Finger Drag	Pan camera target
Resize window	Viewport adjusts dynamically

Build Instructions

Requirements

• Emscripten SDK
• make
• glm header library (expected in external/glm)

Build & Run

make

This will compile main.cpp to WebAssembly via emcc and launch your default browser automatically.

To enable the touch emulator (for testing touch input with a mouse on desktop):

make TOUCH_EMULATOR=1

To clean:

make clean

Third-Party Libraries

Library	License	Usage
GLM	MIT	Math library for OpenGL
TouchEmulator (Hammer.js)	MIT	Desktop touch event emulation for development