Heaven/TQA Posted January 23, 2019 Share Posted January 23, 2019 I just found that in the files Tamas send me years ago. I first thought its the Joyride demo Twirl but then I have seen its a unreleased fx. It was written in Atmas2 assembler format and the gfx and tables were generated in Turbo Basic. So that was the old native coding approach before Tamas went to university and used PC cross assembler and tools... I will post these days the exe file. 21 Quote Link to comment Share on other sites More sharing options...
F#READY Posted January 23, 2019 Share Posted January 23, 2019 Very interesting and cool find! 1 Quote Link to comment Share on other sites More sharing options...
Gunstar Posted January 23, 2019 Share Posted January 23, 2019 A very cool effect, but I'm more interested in what the graphic mode(s). I'm guessing it has to be a software mixed GTIA mode, but the video doesn't show scan-lines or flicker, I'm guessing it was made using Altirra or other emulator, so I don't know how close to the video it would look running on a real machine with CRT or LCD for sure. I guess I'll find out when you release the .xex later. I was just thinking how cool it would be to have a game running in this mode similar to Space Harrier or Rescue on Fractalus/Eidolon/Koronis Rift or other types of scaling "3D" graphic engines. Judging strictly by what I see in the video. I am of course referring to background graphics and scrolling/color-shifting fields or fractal/voxel type engines and not player missles or software sprites (unless software sprites could be done that way too).. 1 Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted January 24, 2019 Author Share Posted January 24, 2019 Its classic mose9/11 flip per frame. I recorded it with frame blending. 2 Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted January 24, 2019 Share Posted January 24, 2019 Its classic mose9/11 flip per frame. I recorded it with frame blending. I never thought this mode was very good (on an NTSC machine) but that's before I learned that PAL blends the chroma into two scanlines, so Gr9 would get colour mixed into it. I'm sure that was really impressive in PAL back in the day! Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted January 24, 2019 Author Share Posted January 24, 2019 A very cool effect, but I'm more interested in what the graphic mode(s). I'm guessing it has to be a software mixed GTIA mode, but the video doesn't show scan-lines or flicker, I'm guessing it was made using Altirra or other emulator, so I don't know how close to the video it would look running on a real machine with CRT or LCD for sure. I guess I'll find out when you release the .xex later. I was just thinking how cool it would be to have a game running in this mode similar to Space Harrier or Rescue on Fractalus/Eidolon/Koronis Rift or other types of scaling "3D" graphic engines. Judging strictly by what I see in the video. I am of course referring to background graphics and scrolling/color-shifting fields or fractal/voxel type engines and not player missles or software sprites (unless software sprites could be done that way too).. I have a prototype of my voxel engine in 256 col... 2 Quote Link to comment Share on other sites More sharing options...
Gunstar Posted January 24, 2019 Share Posted January 24, 2019 (edited) I never thought this mode was very good (on an NTSC machine) but that's before I learned that PAL blends the chroma into two scanlines, so Gr9 would get colour mixed into it. I'm sure that was really impressive in PAL back in the day! I agree, I thought it looked bad on NTSC too, if it wasn't interlaced. But when interlaced it mixed the colors with the gray scales, but of course you got flickering, but this would have been better at 60Hz rather than PAL 50Hz. I didn't mind the flickering for the higher perceived vertical resolution and better color. Edited January 24, 2019 by Gunstar 1 Quote Link to comment Share on other sites More sharing options...
emkay Posted January 24, 2019 Share Posted January 24, 2019 I never thought this mode was very good (on an NTSC machine) but that's before I learned that PAL blends the chroma into two scanlines, so Gr9 would get colour mixed into it. I'm sure that was really impressive in PAL back in the day! That would work if Gr. 9 and 11 is "interlaced" . Flip per frame will horribly flicker on PAL, and less flicker on NTSC. Quote Link to comment Share on other sites More sharing options...
Sandor / HARD Posted January 24, 2019 Share Posted January 24, 2019 Wow When I made this in approx 1995/96 I thought we're going to release Dressed for Success (never happened). Looking at all the bits and pieces you recovered (plus it would have introduced HIP) it could have been an interesting demo disk it seems. Please make the video listed on YouTube if you'd like. 4 Quote Link to comment Share on other sites More sharing options...
Poison Posted January 24, 2019 Share Posted January 24, 2019 They should do 4th megademo their effects are great! 3 Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted January 24, 2019 Author Share Posted January 24, 2019 Sandor you did it? Aah I thought Tamas.... good. Quote Link to comment Share on other sites More sharing options...
Sandor / HARD Posted January 24, 2019 Share Posted January 24, 2019 Sandor you did it? Aah I thought Tamas.... good. Yep, it was me. (it's a progression from my original GR9 Joyride Twirl - which is also the basis of the Dressed for Success Torus you already unearthed) Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted January 24, 2019 Author Share Posted January 24, 2019 Torus.... best fx still not get 100 how its based on a twirl... 1 Quote Link to comment Share on other sites More sharing options...
Sandor / HARD Posted January 24, 2019 Share Posted January 24, 2019 Torus.... best fx still not get 100 how its based on a twirl... I'm sure you do! Anyways, for anyone who might be interested: It's lit from the front so that you can rotate it around its center (the same way as the girls' faces rotate) without the need to recalculate lighting. So you get away with a pre-calculated 360 degree rotation animation one axis (X or Y, doesn't matter), then the you can rotate with the "twirl engine" on the other axis (Z). This gives you two independent rotation parameters that you can drive with sin/cos/whatever you like. So you can do a very high framerate compared to a real torus algorithm and nobody notices it's fake 1 Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted January 24, 2019 Author Share Posted January 24, 2019 But how much is precalced of the anim? 1/8 of a torus and then built by tables? Quote Link to comment Share on other sites More sharing options...
Sandor / HARD Posted January 24, 2019 Share Posted January 24, 2019 But how much is precalced of the anim? 1/8 of a torus and then built by tables? Maybe a 90 degree animation is stored, but it was way too long ago to remember. In any case, that's the straightforward part. Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted January 24, 2019 Author Share Posted January 24, 2019 I could peek in pascal source 1 Quote Link to comment Share on other sites More sharing options...
Poison Posted January 24, 2019 Share Posted January 24, 2019 When I saw Joyride demo a call to my friends and ivite them and say "watch it! I have Atari ST :)" And than we sit in front of my BW TV with open mouths Year 1995 ? Maybe. I love Hard soft demos. Great effects and absolute epic music! sorry for OT. But i am a bit sentimental now. 1 Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted January 24, 2019 Author Share Posted January 24, 2019 Well... not sure if music rocks... I love the loading music and joyride Digi intro... but Sandors SID player is not my cup of tea... 1 Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted January 24, 2019 Author Share Posted January 24, 2019 (edited) here you go.... I guess Sandor does not complain I just zipped the complete folder including all turbo basic and atmas 2 sources plus my MADS version. my converted version is interactive you can press OPTION and SELECT to rotate and warp. whirl.zip Edited January 24, 2019 by Heaven/TQA 4 Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted January 24, 2019 Author Share Posted January 24, 2019 that's the Joyride Twirl WIP.xex 4 Quote Link to comment Share on other sites More sharing options...
emkay Posted January 24, 2019 Share Posted January 24, 2019 that's the Joyride Twirl Things could get interesting if a 9/11 mode was used. I wonder about the slowdown that may happen, changing the mode every scanline. Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted January 24, 2019 Author Share Posted January 24, 2019 Things could get interesting if a 9/11 mode was used. I wonder about the slowdown that may happen, changing the mode every scanline. the archive I have posted refering to the video is 9/11 pal blending or do you mean without flickering so APAC mode? Quote Link to comment Share on other sites More sharing options...
emkay Posted January 24, 2019 Share Posted January 24, 2019 the archive I have posted refering to the video is 9/11 pal blending or do you mean without flickering so APAC mode? Flickering is never an option in PAL. Quote Link to comment Share on other sites More sharing options...
Gunstar Posted January 24, 2019 Share Posted January 24, 2019 (edited) I agree, I thought it looked bad on NTSC too, if it wasn't interlaced. But when interlaced it mixed the colors with the gray scales, but of course you got flickering, but this would have been better at 60Hz rather than PAL 50Hz. I didn't mind the flickering for the higher perceived vertical resolution and better color. I'm quoting myself just to expand on what I said and I want to keep it all together. With all the great video upgrades with improved color saturation the interlaced mode looks even better on NTSC these days and is tolerable on PAL. Especially if you are using anything other than CRT so there are no scan lines anyway. Interlaced modes are an area of Atari graphics that IMHO modern displays and video upgrades have only improved upon. This assumes you have good displays and video upgrades and not cheap Chinese junk. Edited January 24, 2019 by Gunstar Quote Link to comment Share on other sites More sharing options...
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