Tag Archives: Screen

Demo Code #1 – Vector Graphics

L Break Into Program Posted on July 1, 2012 by

I’m currently working on a vector graphics library; this will eventually include fast implementations of line, circle and triangle rendering. There will be options to render on the standard Spectrum screen (with it’s horrid layout) and to a more sensibly laid out offscreen bitmap. I’m also going to add filled circle and triangle with optional texture shading (an 8×8 graphic). I’ve just reworked a version of Bresenhams Incremental Line Algorithm in Z80, working in one …

Sample Z80 code now available to view

L Break Into Program Posted on June 16, 2012 by

I’ve been very busy at work recently so have been unable to fiddle much with my broken Spectrum; it’s very much a lunchtime activity but unfortunately my lunchtimes have been non-existent recently. However, I have been fiddling around writing some Z80 for my own pleasure and have posted the source online today for your amusement. I’m perfectly happy for you to use this code or this with or without modification; a little acknowledgement would be nice, …

And so it begins… Again…

L Break Into Program Posted on September 6, 2011 by

Well, I’ve finally dusted off my Z80 programming skills and after a little refresher course with the University of Internet I’ve developed this sprite demo. Most of the concepts here are not new; they are how I wrote games back in the day. The sprite routine is basic; it does not mask, but it is using pre-shifted sprites and running within a vertical interrupt routine. The red border, by the way, indicates how much raster …