Welcome to the Particle & Planet Simulator!

• What's happening?
  Thousands of particles drift and react to gravity. Planets orbit each other and are also affected by touch/mouse gravity wells (acting like massive objects). Particles are attracted to planets and touch points. Particles change color based on speed and leave trails. Planets do not leave trails.
• Interacting:
  • Drag Mouse/Touch: Creates a temporary gravity well affecting both particles and planets. Strength is controlled by the 'Touch Gravity' slider (for particles) and acts like a 5000 mass object (for planets).
  • 'Place Planets' Button: Click this first to enter placement mode (button turns green, cursor changes).
  • Click Canvas (in Placement Mode): Adds a new planet (up to 10). You'll be prompted to set its mass (100-5000 recommended). If 10 planets exist, the oldest is replaced. Click the button again ('Cancel Placing') to exit placement mode.
• Controls (⚙️/X Button):
  • Play/Pause: Toggles the simulation animation on or off. Allows placing planets without interaction when paused.
  • Adjust particle Count, Size.
  • Particle Weight: Controls particle inertia/mass. Higher values make particles harder to accelerate and decelerate.
  • Trail Length (0=no trail, 1=infinite trail). Faint parts of trails fade faster near max length to reduce ghosting.
  • Set Touch Gravity strength (affects particles).
  • Set Planet Gravity to control how strongly planets attract particles (scaled relative to Touch Gravity, max 1000).
  • Configure particle Slow/Medium/Fast colors and the Background color using the color bars (opens a picker).
  • Color Change Speed adjusts how quickly particles shift colors based on velocity (higher value = faster change, max 100).
  • Random Colors ( Icon): Sets new random particle/background colors.
  • Reset All ( Icon): Resets particles AND removes all planets to the initial state.
  • Share: Copies a link to your clipboard with all current settings encoded, allowing you to share your creation.
• Planet Physics: Planets attract each other using an N-body simulation (gravity constant G, minimum interaction distance). Planets are also attracted to touch/mouse gravity wells. They wrap around screen edges. Planets attract particles based on their mass (scaled by Planet Gravity slider). Planets themselves do not leave trails. Planets experience a subtle, mass-dependent velocity damping (lighter planets slow down slightly faster).

Experiment with settings and enjoy the cosmic dance!