Positron5

OK I'll bite. If you are after the Ballblazer playfield effect then a method like the one I used on the atari 8bit would do.. Take a sprite like this one for a space harrier background: harr_playf_1.pcx With the tilt capability of the lynx you could tilt this image through 2 "segments" then switchback to original image. That takes care of horizontal parallax. To simulate forward and backward movement you would need to use line interrupts to animate bands of colour down the screen.?

I would like to report on my attempts to compile @42BS's poly_mmu_68k source from: https://github.com/42Bastian/new_bjl/tree/main/exp/poly_mmu with further advice from Bastian his code needs his modified rmac( that provides option -4) and rln and his latest lyxass that can be obtained from his github repository. The variable BJL_ROOT needs to be declared( see export command) I have to say that I'm a user of cygwin64 under Windows8.1 and this causes an "can't find file or directory" error that breaks the build. If anyone wants to try this I would be interested to hear your results.

pm sent

That's good, it is probably a problem with my tool chain.

As an experiment I tried to compile poly_mmu from the makefile and lyxass2022( also rmac) and I got a load of errors. One such warning was file poly_mmu equ is missing. ??

The clipping concept is good but I think that the blitter triangle way looks the winner.

For anyone that is interested, you can find Bastian's source code from his topic here: New bjl_update: Polygon

That's great, this makes a valuable contribution to the subject. I have had a look and the gpu source for poly_mmu is there -it is the file listed as poly_mmu.js.

@42bs. I will try and have a go at producing some triangles and get to know the blitter instruction set.☺️

Thanks @Cyprian for replying, I searched through the forum and I found this- In it Luigi301 gives a good account of a method of using the blitter etc to create a functional 3d renderer. GPU and blitter looks like the way to go.??

I want to investigate how you would draw a triangle on the jaguar display. Would this be possible by using the scaled bitmapped object and controlling the HSCALE and VSCALE (independently?), xpos and ypos values, similar to @42bs's atari lynx method. Can anyone explain the process? Andrew

I think this thread is great. The technical analysis is really fertile and with coders like BS42, Cubanismo, Cyprian , CyranoJ, Zerosquare, laoo and others the Jag scene looks like some great things are happening. Cheers

Thanks, sometimes a simple technique can be all that's needed to get the right effect.?

Hi @Karri, I'm intrigued- Are you drawing EOR sprites and tricking out the palette??? Andrew

hi Karri, Also, Shakespeare wrote some of his plays to gain favour with royalty like Queen Elizabeth 1.