Simon’s Particle Train

Simon made a particle system based on Daniel Shiffman’s latest live stream. Here is the link to Simon’s code on CodePen:

He also tweeted about it:


Simon solved the bug in his Bit Invader game!

Simon actually managed to solve the bug in his Bit invader code! This is a game he was translating from Codea into JavaScript, we have already published a blog post about it here.

The project is available on Simon’s page in Codepen:

In the two videos below Simon explains what the bug was (he had forgotten a “break” statement). He insisted I include both videos, but actually only the second one is informative:


Simon still needs to add explosions to this game (make the enemies explode), so there will probably be a follow-up on this one.


Translating Bit Invader from Codea into JavaScript

Simon tried to reconstruct Bit Invader game (from in JavaScript, but got stuck at a certain point when he was programming the enemy to recognize the hero and the bullets. Here is how far he got. The project is available on Simon’s page in Codepen:


Polar to Cartesian converter (Simon’s own code)

Simon built a Polar to Cartesian converter (Simon’s own code). You can enter the radius in pixels and the angle in degrees, click “convert” and you get the coordinates in x and y and a circle appears n that spot.

You are welcome to play with Simon’s converter online in CodePen at:

Simon is also planning to make a similar converter for Spherical to Cartesian (where you would enter radius, latitude and longitude and convert those into x,y,z).



Here Simon explains the formulas to convert between Polar and Cartesian coordinates: