aka Zombie’s software eye logo.

See the Pen
Faux sphere render + interactive lighting
by Hristo G. (@izo0x90)
on CodePen.

Quick and dirty lighted “sphere” likeness using circle radius calculation for the color intensity value. We shift the “lighting” around by adding/subtracting to the color intensity amount of a pixel on the “sphere”, this amount is based on the current x, y position of the pixel multiplied by horizontal and vertical constants. Those are modulated by the current mouse x, y mouse cursor position as percentage of the inner window dimensions. The green/zombie’s “eye” was a logo that I used when branding the games/ graphics demos, etc. that I would write way back when in the ’90s.

This is a Raycaster I created from scratch,written in Javascript that uses an unconventional algorithm I came up with. It was a fun exercise in thinking, starting at trigonometry and coding an algorithm that worked. Once I finish up a few more details in the code I will put up blog post here describing things in more detail. For now you can click the link below and play around with the raycaster engine, a very very un-optimized, zero error checking raycaster engine, but in the words of Boltr, “She chooches!”

RaycasterTestV01 Click here to launch!

Here is some of the work that we have done in a signal processing class CSC214 I was sitting in on during spring semester 2018, held at MCC, Rochester NY and instructed by D. Venable.

I helped with some of the software development for the creation of the first iteration of this class a long while ago, now years later it has been fully revamped.

The students now take hands on approach with both the hardware and software development. Unlike previews iterations where software was built by me and the instructor who originated the class and hardware was designed and built by the instructor. The old curriculum involved them experimenting and exploring this pre-built system, while in the new curriculum students are active part in all aspects of camera development, including embedded on camera and pc client software, case and mechanics design and building, circuit board layout and population, etc. Continue reading

The Raster bar, also known as Copper bar, is a very popular graphics effect seen on many of the personal computers in the 80’s through 90’s era.

It was widely used in video games and especially graphics demos. Here is a link to the wikipedia article for more detail, https://en.wikipedia.org/wiki/Raster_bar.

It is accomplished by changing the background color in-between scan lines being drawn on the monitor/screen. This requires  accessing the video controller hardware directly and changing appropriate registers as well as a way to time it precisely with the screen being drawn.

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DumbGame is a video game I wrote in 2002 intended to serve as somewhat of a tutorial or map of how games were developed in years past, on the  80×86 architecture under DOS (Disk Operating System). Going through an old laptop hard-drive I recently rediscovered its source code, finally making an appearance on the Internet as intended, even more appropriate and nostalgic this many more years later.

Its name sake is due to the fact that the actual game play, graphics, levels etc. were minimally developed only to the extent needed to showcase the functionality of the game engine.


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Here is a simple graphics demo written in JavaScript utilizing the Canvas element in HTML5. It takes a 2D image from a file and renders a faux 3D spinning box with the image as all sides. On occasion a random idea crosses my mind and I proceed to speed write some code just to see it take place, this is one of those. Rarely is the code intended to be read or understood by anyone other than me, so comments, etiquette etc are not to be expected. It should be no issue here as this a quick and simple piece of code.

This was a bit of nostalgic tip of the hat to the days of old and the graphics demo scene. When such image manipulation and graphics tricks required assembly programming and razor edge optimization to run smoothly. As such it is only appropriate to put the Amiga logo to spin front and center as that is where it all really began.