ripples.tic

Press X or drag with mouse to generate ripples.

Multiple variations for a ripple effect, made in the TIC-80 fantasy console with this tutorial.

Source code included, feel free to use in your personal projects!

 

ripples.tic

The basic version.

  

ripples-lowres.tic

Basic version in half the resolution to lighten the calculation (this is the one that is embedded to the top of this page!)

  

ripples-damped-sine.tic

I wanted to model waves bouncing off each other, so - math alert - a time derivative of the wave amplitude is used to calculate a sine component to make the amplitude negative at times...  It almost works! 

The waves have a nice digital tail, which is  a e s t h e t i c a l, so I included it here.

 

ripples-damped-sine-lowres.tic

Same as above, but in half the resolution. Halving the resolution was even more important than in the basic version - now I had to store not only two states of the amplitude but its derivative as well.