This is a LabVIEW implementation of the fire effect as seen in the Doom ports for the Sony PlayStation and Nintendo 64.
The fire can be started and stopped using the buttons on the right (adding or removing the white pixel fire 'source'). A quick and dirty particle effect was added when clicking and dragging the mouse around the graph. It simply sets the pixel location to a fire source, and looks a bit like embers floating away which sometimes ignite and burn up.
Credit to @SVKaiser for reverse engineering the effect and porting it to HTML5, and to Fabien Sanglard (@fabynou) for the cleaned-up source and detailed write-up. Doom font text was created with Doom Writer by Vincent (PDP).
The algorithm ported easily to LabVIEW and was up and running in fairly quickly. The Intensity Graph was used as a canvas as it provides a colour palette (with interpolation if needed), and has built-in canvas scaling. Note that the Y-axis is inverted, so the upper-left is the origin. The 2D Picture control could've been used (in 8-bit mode with the 37 element palette), but I like that a regular graph control can handle everything with a LabVIEW look.
All code is in LabVIEW 2018, with a LabVIEW 8.6 version available under Releases.
Here's some example code screenshots for those without access to LabVIEW.
