ROG_VF information 29 glöps

- general:
- level: user
- personal:
- first name: Robert
- last name: Smith
- demo Amiga OCS/ECS Grade My Waterbear by Scoopex [web]
- assumption: 4 bpls, texel width 4px
I just grabbed a piece of paper and a pen and sketched down an idea ...counting...counting...counting...oops, the width would be 200px like for "Grade My Waterbear". Could it be that four adjacent sprites in the middle of each line play a key role?
During the night I did some more thinking and figured out a slightly modified variant having a width of 208 or maybe even 216px.
Just some more loose thoughts:
Lets assume a rotozoomer with a texel width of 2px, 4 or 5 bpls and a height of maybe 100px.
Would it be feasible to code a horizontal (= in x direction) copper interlace in order to double the width? That is, the first frame displays the odd texel columns with bitplane information that are separated / interspersed with empty spacer texels at the even positions. And the following frame is then displaying the even texel columns with bitplane information whereas the odd texels are now empty. I guess it stands to reason that this will cause a flickering like for the usual interlace mode. But could this be mitigated and prevented by switching to the next frame and its copperlist and by setting the beam position (writing to $dff02a / $dff02c) to the first line of the next frame as soon as the last rotozoomer-line of the previous frame was displayed? Or is this, like my former boss liked to say, pure bullshit? - rulezadded on the 2021-02-23 17:36:48
- demo Amiga OCS/ECS De Profundis by Lemon. & The Deadliners [web] & Oxygene [web]
- @Leonard
I appreciate your tech talk in the credits part. I want more of that!
By the way, may I ask how many frames (=glenz vectors) do you queue up?
Moreover, I appreciate your view that both machines, the Atari ST
and the Amiga, rule. I always found it childish that both camps were
full of disgust and fought each other (like C64 against CPC). The few
and very smart Atari ST coders I knew seemed a bit envious - or
"frustrated" is maybe the better word - since a couple of things were
much easier to realize on the Amiga than on the Atari ST; "the
opening of the screen borders" on the Atari ST, as they had called it,
seemed to be a science in itself. - rulezadded on the 2021-02-17 13:58:58
- demo Amiga OCS/ECS Animotion by Phenomena
- I love that production. As far as I can remember (maybe I am wrong
- see below) this is the only demo from Celebrandil I came across
back then in the good old times. After all these years it is still
enjoyable to watch (the raytraced animation and the space cut
vectors are among my favorites) and I still remember the name
Celebrandil. He is a sorcerer and genius!
Moreover, the music by Mantronix and Tip is great, too. A very nice
melody that - despite its melancholic touch - cheers me up and sets
me in a good mood.
But I need your help: I thought a room based
on filled vector gfx (with bed, tv, table...) that is rotating around its
y-axis was part of this demo - like the one that appears in a modified
version in Quartex's Substance). But I can't spot it in Animotion and
obviously my memory is deceiving me here. So my question is:
Which production (I am 99% sure it was from Celebrandil) contained
that mysterious room?
Why it is important to be Earnest. - rulezadded on the 2021-02-13 11:34:33
- demo Amiga OCS/ECS Marchewki by Alchemy
- mayday, mayday...
Does anyone know the secret behind Vico's dot (-sphere)
algorithm/routine and is willing to share it? I am so curious since Chaos
and Hannibal were so wild about it. Is it a kind of (pseudo-) c2p and / or
does the x-flag play a key role?
Thank you pals and ntscs :-)
By the way, this is truly a palatbale production. Very nice! - rulezadded on the 2021-02-05 15:56:03
- demo Amiga OCS/ECS Cebit demo 90 - Revenge of babbnaasen by Red Sector Inc. [web]
- The return of Delta, Dr.C, Dark, and Romeo Knight, and ... the juggler. Awesome! Although many of the objects need more than one frame, the movements still look fairly smooth. But it would have been great if they had designed some more "animated" objects like the helicopter with the rotating blades or the space-ship with its segmented and beating wings that move along a sine wave.
Maybe I am alone with that perception, but watching this production - despite its sweetness - somehow drags me down and sets me in a sad mood. Don't know what's wrong here?!
Something different. Once I phoned Delta when I dared the step from non-filled to filled 3D vector graphics. Although he did not know me and I was a nobody, he patiently answered all of my questions and even told me some useful tricks / hints. Eventually he wished me good luck and a lot of success. What a nice person!
By the way, what is that for a brown creature in the title pic? - rulezadded on the 2021-01-01 12:39:56
- cracktro Amiga OCS/ECS Arcticfox 100% by Scoopex [web]
- Awesome Christmas present. After last year's Hacker 100%, it's another intro with a tunnel. Looks like it is becoming a kind of tradition ;-)
ROG likes code, graphics and music. ROG must go now and fight unfriendly aliens. - rulezadded on the 2020-12-25 15:47:02
- demotool Amiga OCS/ECS DemoMaker by Red Sector Inc. [web] & The Clumsy Creepers
- @gaspode (2020-12-21): Okey-dokey. Thanks for the hint. And keep up your nice work!
- isokadded on the 2020-12-23 15:06:23
- demotool Amiga OCS/ECS DemoMaker by Red Sector Inc. [web] & The Clumsy Creepers
- Why? For the money? I would have liked it more if Delta had put his energy into another demo. Anyway, nice toy for those who were needy with respect to their coding skills. If I remember correctly, the handling of the program was straight-forward, but it would have been a big plus if one had had the option to use own Gfxs for the effects; or was that possible?
Moreover, I remember that Delta mentioned and thanked Promax for a trick that allowed him to allocate some extra memory. What did Delta mean by that and what is that for trick? And Stingray (2015-03-08), what do you mean by "crappy code"? - isokadded on the 2020-12-21 16:49:26
- demo Amiga OCS/ECS Elysium by Sanity
- That was one of those special and magical moments when I first saw this production. A demo with a lot of new and neat ideas and a very smart coding. On the one hand I was enthusiastic and on the other hand I was shocked. I thought: How on earth did they do that? Where is the trick? And who could have imagined and anticipated that the little Amiga was capable of producing such a massive output? I had to find out more about it, grabbed the phone and punched Panther's number. He sounded a bit bothered and bored. I guess he got many calls and had to listen to the same questions over and over again. Even though he was so kind to explain the principles / basics for the some of the effects (without going into detail), the production never lost its magic for me. I still like to watch it after all the years - being enthusiastic and shocked at the same moment.
By the way, what happened to Panther? I seem to remember only one other bigger production where he was involved in. Was he fed up, did he change to the PC camp and / or no time for conding demos anymore?
Another point: ranked 3rd in the Amiga Summit Convention 1991? Dudes, that is a bad joke! The ranking should have been like this: 1) Elysium, 2) Substance, 3) Global Trash - rulezadded on the 2020-11-14 14:16:21
- intro Amiga OCS/ECS Synaptic by Paradise [web]
- Only want to mention that Tedric was so kind and nothing daunted to fight his way through my submitted source code in order to add and replace some of the originally included graphics with nicer looking ones. Thanks & credits for that and for having adapted the code to the changes.
This production took me while to complete due to a busy schedule in school and some other private distractions. The coding was not too challengeing but somehow it was a lot of typing and a couple of tiny things had to be considered. Quite annoying for such a harmless and plain looking production; in the end I kind of felt like an "optimum fuckup" ;-)
Moreover, I seem to remember that certain combinations of values that were consecutively loaded into $102 caused "very nice" vertical (red?) streaks which made it necessary to revise them by hand. Has anyone experienced similar artefacts? Troubleshooting? ROG hates things he does not understand! - isokadded on the 2020-10-27 14:36:23
account created on the 2005-07-06 14:48:40