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Raspberry Psy by Desire [web]
screenshot added by Ramon B5 on 2016-09-10 23:50:47
platform :
type :
release date : september 2016
release party : Function 2016
compo : wild demo
ranked : 1st
  • 76
  • 5
  • 0
popularity : 68%
  • 0.94
alltime top: #1058
added on the 2016-09-10 23:50:46 by Ramon B5 Ramon B5

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great! a classic demo.
rulez added on the 2016-09-10 23:54:05 by marlowe marlowe
Even with knowing some of the stuff beforehand, i didn't expect it to be THIS good. Really excellent work everybody! ♥
rulez added on the 2016-09-10 23:57:11 by HellMood HellMood
...what marlowe said...especially for that platform...
rulez added on the 2016-09-11 00:35:55 by Kuemmel Kuemmel
Didn't look too special but it got me in the end :) - some really nice scenes in here!
rulez added on the 2016-09-11 06:40:28 by visy visy
Neat psytrance demo on the Raspberry Pi
rulez added on the 2016-09-11 10:04:36 by Queen_Luna Queen_Luna
needs to be 8 minutes long :D
rulez added on the 2016-09-11 14:20:27 by sensenstahl sensenstahl
Some notes for those who try to run this on raspberry pi:

Development started on rpi1, later switched to rpi2. The target speed was 30fps on 720p on rpi2, it ended up faster, around 40fps. It's also fully compatible with rpi1 although runs somewhat slower on that. For OS you need Raspbian (may work on other distros as well). And don't forget to give 128 mb ram to the gpu (gpu_mem=128 in config.txt). That's all. :)
added on the 2016-09-11 15:01:50 by blueghost blueghost
what sensenstahl said, but longer.
rulez added on the 2016-09-11 19:57:35 by guyfrost guyfrost
never imagined that a raspi is able doing those fancy visuals!
rulez added on the 2016-09-11 19:57:46 by Virgill Virgill
raspi reference demo.
rulez added on the 2016-09-11 20:08:51 by wysiwtf wysiwtf
what Virgill and wysiwtf said!
rulez added on the 2016-09-11 20:12:19 by bonefish bonefish
That's really cool, tech and all. :)
rulez added on the 2016-09-11 20:37:34 by Starchaser Starchaser
I enjoyed that bigtime, thanks for the Deadliners greet aswell, we appreciate it.
rulez added on the 2016-09-11 20:42:30 by Dascon Dascon
Wooooh! Very good codewise, gfx wise and music wise!
rulez added on the 2016-09-11 20:51:55 by Soundy Soundy
nice one for this little machine :)
rulez added on the 2016-09-11 20:59:22 by ntsc_ ntsc_
It's like an old TBL demo!
rulez added on the 2016-09-11 21:14:01 by Optimus Optimus
Excellent 'demoish' demo. Ticks all the goa/psy clichés. :)
rulez added on the 2016-09-11 22:10:43 by Alpha C Alpha C
Very nice! Raspberry Pi just became a cool machine for demos :)
rulez added on the 2016-09-11 22:23:36 by exocet exocet
rulez added on the 2016-09-11 22:28:07 by bitl bitl
rulez added on the 2016-09-11 22:41:51 by ozan ozan
Nice one guys!
rulez added on the 2016-09-12 16:09:15 by daison daison
Best RPi demo so far + platform thumb. More!
rulez added on the 2016-09-12 16:22:13 by Radiant Radiant
Psybakúrt jóság.
rulez added on the 2016-09-12 18:34:40 by -SP- -SP-
nice flow, good work!
rulez added on the 2016-09-12 19:52:01 by Biter Biter
amazing!! somehow I think about Stash / TBL, maybe because of the song & colors... my favorite part (which seem one of the easier one) is at 1:25... but the design of it is innovative!
rulez added on the 2016-09-12 22:51:30 by F-Cycles F-Cycles
it's just splines+animated uvs yeah ;)
BB Image
Nice psychedelia. Raspberry Pi is a great demoplatform.
rulez added on the 2016-09-12 23:53:53 by ham ham
Trippy coolness!
rulez added on the 2016-09-13 00:02:36 by CiH CiH
Excellent pyramid scene
rulez added on the 2016-09-13 12:48:30 by Frequent Frequent
Quality psytrance antics! I liked the snakescene best and perhaps the sierpinsky pyramids!
rulez added on the 2016-09-13 13:55:09 by rloaderro rloaderro
rulez added on the 2016-09-13 19:23:40 by Corial Corial
Wow, 90s style psy demo (not a bad thing :) but with *very* cool visuals for the pi!
rulez added on the 2016-09-13 22:32:03 by psonice psonice
very good!
rulez added on the 2016-09-13 22:55:54 by dipswitch dipswitch
Fantastic demo
rulez added on the 2016-09-14 13:00:58 by organicdreams organicdreams
Excellent, massive respect!
rulez added on the 2016-09-14 15:13:28 by rc55 rc55
rulez added on the 2016-09-14 20:47:59 by Harekiet Harekiet
Nice demo with tasty psy tune! :) Congratulations!
rulez added on the 2016-09-14 21:31:59 by viti viti
Maali = instant thumb up
(test him more on animals ;)

Great going.. keep on doing the organizing job mister b5.. (i know how hard it can be) cheers!
rulez added on the 2016-09-14 22:15:01 by magic magic
btw, the win32 and linux binaries are included in the same zip, so, it runs on regular desktops as well :)
rulez added on the 2016-09-16 08:35:21 by CrzyClst CrzyClst
neat, although could be even a bit more trippy in my opinion.. :)
rulez added on the 2016-09-16 11:19:36 by toxie toxie
rulez added on the 2016-09-18 00:51:28 by Chainsaw Chainsaw
rulez added on the 2016-09-19 00:25:33 by lug00ber lug00ber
Blew my mind even in "slow" mode on rpi1. Compability note: requires Raspbian Jessie with libsdl1.2, Wheezy will not do. Don't be deprecated ;)
rulez added on the 2016-09-21 22:07:35 by El Topo El Topo
Maali = instant thumb up
rulez added on the 2016-09-23 16:12:48 by skrebbel skrebbel
What visy said. Also, the circle infinite zoomer-thingy looked stellar. Special kudos for that.
rulez added on the 2016-09-23 16:43:18 by Preacher Preacher
I'm gay for trance demos.
rulez added on the 2016-09-23 20:32:08 by dixan dixan
Nice. :)
added on the 2016-09-24 05:02:14 by AntDude AntDude
What wysiwtf said!
rulez added on the 2016-09-24 15:57:18 by Fell Fell
rulez added on the 2016-09-24 16:24:36 by TomoAlien TomoAlien
totally cool!
rulez added on the 2016-09-24 20:02:31 by keito keito
Awesome with some really cool effects!
rulez added on the 2016-10-01 10:20:20 by Daniel Daniel
Awesome demo! I'll have to show this one off to a few friends running on one of my RPi 3s, blow some minds. :D Rulez.
rulez added on the 2016-10-01 17:11:17 by Alopex Alopex
The 00s called, they want they trance demo back. Good RPI demo.
rulez added on the 2016-10-01 18:29:43 by raer raer
Enjoyable :)
rulez added on the 2016-10-01 21:59:40 by Dbug Dbug
I totally dig this <3
rulez added on the 2016-10-02 19:22:41 by Triace Triace
Splendid demo!

I think you used the RasPI for what it was made for, atleast demoscene-wise, which is going back to the midskool and deliver some kickass psyTrance-Demo(s).
I mean: Hardware like 15 years ago <-> Demos like 15 years ago! :)
Now i demand you to make like 10-20 more of these until it gets boring again or sth! ;)
rulez added on the 2016-10-05 10:33:10 by ɧ4ɾɗվ. ɧ4ɾɗվ.
Nice stuff.

I would prefer constant full framerate. Now it's smooth only in 3-4 parts, and slower-faster-slower-faster oscillation through most of the parts. It doesn't feel completely like a Raspi demo, if it doesn't even run smoothly, and there are ports for other machines. :)
rulez added on the 2016-10-08 00:06:47 by yzi yzi
yzi... on a 2 or 3?
Raspi 2. I have it set to a 720p50 video mode. Does the demo try to change the mode? If that's even possible. If it's 50 Hz, then it should be easier to achieve full framerate. Anyway, to me it doesn't make sense not to try to get full framerate, or even a steady fixed framerate. In a demo that is targeted at a very specific piece of hardware. If it was an Amiga OCS demo, the slower-faster-slower-faster pumping would be just lame. :)
added on the 2016-10-08 16:11:05 by yzi yzi
The target speed was 30fps on 720p on rpi2, it ended up faster, around 40fps.

I think 30fps is acceptable...sure, we are used to 50 on Amiga, but even 25 still looks fluid for the human eye. If it´s really fluctuating visibly i think it´s on your rpi² only?!
On a Raspberry 3 running Raspbian, no matter the amount of GPU memory allocated (i tried from 16 to 512 megabytes).

Here's what i got:

"Changing SDL_AUDIODRIVER to alsa.
Enthusiast Engine v1.2
Found dsr-rpsy.dpk
Starting the demo
* failed to add service - already in use ?"

Gfx driver installed; Glxgears works perfectly at 60 fps.
added on the 2016-10-08 18:06:36 by hitchhikr hitchhikr
Hardy: I don't claim stuff about "the human eye", but MY eye says this demo has a fluctuating framerate, jerky moments, and even short pauses when a cross-fade between parts begins. I'd rather look at less complex stuff, but smoother, i.e. more beautiful motion. I know, not everybody is sensitive to it, just like some people are tone-deaf, as evidenced by the appreciation of a lot of the stuff made for the Atari POKEY chip. ;)
added on the 2016-10-08 20:58:42 by yzi yzi
next time we'll just ditch all the eye-candy and do a flat shaded rotating cube for 10 minutes for your poor eyes that apparently need high framerates!
No need to get touchy. It's totally OK to be tone-deaf. A lot of people are like that.
added on the 2016-10-08 22:10:57 by yzi yzi
oh don't worry, listening too long to Atari POKEY probably makes everyone tone-deaf at some point! and sensitive to framerates at it!
There are POKEY tunes that are intune! They are usually by the polish masters and they don't have deep bass (which always fuxxed it up).
rulez added on the 2016-10-08 22:26:47 by Serpent Serpent
Hey, there are Pokey Tunes a) in tune b) not by Polish and c) including deep bass ;)
added on the 2016-10-08 23:14:58 by Triace Triace
Me no polak! But Xtd and Snoopy love forever :)
added on the 2016-10-09 03:04:52 by teo teo
hitchhikr: if glxgears works, that means you switched on the experimental desktop opengl driver in raspi-config which at it's current form can cause problems (this demos demo uses OpenGL ES) so please disable that.
added on the 2016-10-09 21:40:45 by blueghost blueghost
yzi: it's fully understandable that you expect full framerate but that was not the purpose of this demo. :) The pauses between parts are a known issue. That is when the raspi's gpu driver sees a shader or a texture the first time. There is a precaching scene at the beginning (2 seconds long black screen) when the engine uses all the textures and shaders and that helps a lot. But as you can see it's not perfect.
added on the 2016-10-09 22:02:28 by blueghost blueghost
Yeah, it seems to be an issue with OpenGL ES (all other OGLES examples i tested have the same problem). I checked a bit and found that the issue may be located in eglGetDisplay() i added a question at stackexchange regarding this problem, maybe there's a better solution than disabling the whole driver.


PS: You demo runs as expected when the video driver is turned off, the framerate on the PI3 is acceptable, there's some severe slowdowns during scenes transitions but hw acceleration (i assume that without the driver enabled your demo runs with some software rendering fallback) should clear that problem once the driver is (hopefully) fixed.
rulez added on the 2016-10-10 00:04:23 by hitchhikr hitchhikr
rulez added on the 2016-10-10 09:01:28 by tompee tompee
didn't like it.
added on the 2016-10-11 20:48:23 by iks iks
did like it.
rulez added on the 2016-10-25 14:10:42 by Emod Emod
Fogotten to thumb this up! It has great flow and more fidelity than I'd have expected from Raspberry Pi 2.

If I may ask, I tried to achieve shadow effects on Rpi when doing our previous prod. It turned out VC4 does not support depth texture and stencil buffers do not work correctly on RasPi. For this reason we switched to Odroid C1+.

I assume you solved the issue with color framebuffers? Would also explain the aliasing on the shadows, since this kind of workaround would be quite slow, which would limit the size of the shadow texture. In my tests, even using 2 channels for a fake 16-bit value was quite insufferable.
rulez added on the 2017-01-10 14:30:12 by Trilkk Trilkk
Trilkk: that's right. I used similar method described in GPU Gems 1 chapter 12 "Omnidirectional Shadow Mapping"; simply storing the depth values in color framebuffer. Another limitation is that rendering into a cubemap doesn't work on RasPi, so I solved this by using one single 512x512 texture and divided that into 6 subtextures for the six faces of the cube.
added on the 2017-01-20 00:00:24 by blueghost blueghost
rulez added on the 2017-01-20 09:49:23 by hornet hornet
very nice
rulez added on the 2017-01-20 13:43:31 by EviL EviL
nice! love that circle graph zoomer part!
rulez added on the 2017-04-08 03:03:45 by blackpawn blackpawn
Great! <3 RasPi.
rulez added on the 2017-04-18 13:29:20 by uncle_H uncle_H
Great! Nice to see people targeting the R-PI.
rulez added on the 2017-08-04 21:04:55 by Alien / ST-CNX Alien / ST-CNX
Great, and more love to RaspberryPi!
rulez added on the 2017-08-07 17:46:43 by DarkTrancer DarkTrancer
well, the music...hmm
but graphics and colors are 👌👌👌
rulez added on the 2017-09-07 22:19:41 by natalia natalia
rulez added on the 2017-09-08 20:45:54 by hansemann hansemann
proper goademo!
rulez added on the 2018-04-13 16:21:22 by stijn stijn
We really need more software to take advantage of the very capable GPU in the Raspberry Pi.
rulez added on the 2018-09-29 04:06:52 by douro20 douro20
Completely tasteless and eye-/earcancerish, but that's what a psytrance demo needs to be so that's cool. Also platform thumb, obviously.
rulez added on the 2018-09-29 08:56:10 by break break
Good to see some psy one in a while.
A good show, if a little rough around the edges (because of the platform I assume?).
rulez added on the 2020-02-09 18:20:27 by Zavie Zavie
Awesome trip =)
rulez added on the 2020-04-22 15:59:21 by imerso imerso
Excellent pay demo and even better raspberry demo. Probably one of the few raspi demos I will watch more than once
rulez added on the 2020-08-11 10:32:18 by v3nom v3nom
*Psy demo
added on the 2020-08-11 10:32:35 by v3nom v3nom
noice 1
rulez added on the 2021-03-16 15:49:12 by wrighter wrighter
1997 was a good year
rulez added on the 2021-04-12 15:23:46 by grip grip

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