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2417 discussions

vertex_array
by B. Bogart 20 Aug '05

20 Aug '05

Hi all, Does someone have an example patch of vertex_array that provides a 2D grid of configurable size where the opacity of each vertex can be controlled through a message? I'm doing a fresh co of vertex_array because I had trouble with my cvs update -r vertex_array of the gem main branch. (ie the vertex_ objects did not work!) something like this I guess: gemhead | vertex_grid ?? | vertex_color?? | vertex_draw ?? Thanks all! b>

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understanding pix_record...
by IOhannes m zmoelnig 18 Aug '05

18 Aug '05

hi list i'm currently trying to separate the object-code of [pix_record] from the actual capturing. unfortunately i don't really understand what is going on (especially, where the compressor gets the actual image data from. m_compressImage is set to the incoming frame. m_compressImage.data thus holds the raw data. but this information is only passed once (in setupQT). what happens, if the location of the data changes ? this is, dimensions stay the same but m_compressImage.data!=state->image->image.data ? is there some (efficient) way to update the src-PixMapHandle on demand (without having to read to much documentation...) ? mfg.a.dsr IOhannes

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Re: [GEM-dev] GEM Capture Methods
by Georg Holzmann 17 Aug '05

17 Aug '05

Hallo! > Anyway, is it planed to port pix_record to Win? I'll be very thankful > for further informations concerning it, so please keep me in tuch with > further evolutions... I don't know (so I sent this message to the list again ...) Didn't someone also plan to make a pdp-port to windows (günther?)? LG Georg

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pix_coordinate and square vs rectangular textures
by B. Bogart 17 Aug '05

17 Aug '05

hey all, I was messing with pix_coordinate today to see if I can figure out how to make one texture seamlessly stretch over a number of objects. That is the texture is not repeated, but each object only shows a portion of it. Yes the objects are static. Attached is the demo patch. Looks like pix_video coordinates (mode 0) get pretty messed up with the default pix_coordinate values. pix_image (square image) seems to look fine... Maybe pix_coordinate needs a switch to know if its getting a square texture of a rectangular one? I will be texturing live video here so It is important to get it working with rectangular textures (actually I'd rather just have 1:1 and 2:1 and 4:1 ratio cameras.. alas...) Oh, and this is on OSX, no pix_video working on my linux box yet. b>

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osx fullscreen changes survey
by james tittle 16 Aug '05

16 Aug '05

hey, ...well, it had to happen sometime! I've finally come around to a need for a 'kiosk'-like presentation via gem, on a single monitor/ touchscreen...we've been a bit conservative in allowing this, because without the proper foresight/design, it's incredibly easy to lock yourself out of the computer, and thereby require a hard restart :-) ...so, I'm going to go ahead and make it possible in a coupla different ways, but I also want to have an easy way to get out of it...basically, I'm talking about taking over the escape key, such that whenever we're in fullscreen or fullscreen-windowed mode, hitting the escape button will destroy the window...there is a caveat: this will only always work in my pd++.app (or derivations thereof), because keyboard input in gem is dependent on the gem window being front "focused"... ...I think the best way to do this is two pronged: 1. a "fullscreen 1" message will capture the main device, hiding the dock/menubar/option-tab application selector...it'll also always cause the window to be "focused", so 'esc' will always work...plus, in this state we control the VRAM, so we can manage that better... 2. creating a window the size of the screen without a fullscreen message, and without an offset to another device, would also cover the screen, and either automatically turn off the dock/menubar/option- tab-selector, or do so by another message ...does this sound ok? I think using 'esc' for exiting fullscreen is pretty standard in the gaming world and so would be an easy fit here...In any event, I'll be doing it this weekend... jamie

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Gradients in GEM [pd] - possible? also: gemhead -1 with no light and plus capture experiences.
by Enkidu (Xt#) 16 Aug '05

16 Aug '05

Hello there, I got 2+ questions and a comment: 1) can someone tell me if there is a way to texture an object with a gradient, am I missing an external or function in GEM. Of course, I could use a picture but I like the procedural way ;-) 2) When I set the gemhead to less than 0 it ignores the view changes... Cool (I like that feature) but..... I'd love to exclude the lighting also. Do you see any way to do that on a chosen gemhead (ie -1)? Now to my experience with pix_write. As hinted (thanx to the list) I tryed to grab single pictures, then combining it to a movie. But the framerate is unacceptable (sound is eaven worse). I think my machine is fast enouth but then again, you never know. Could there be a way to export the gemwin to the firewire port (I'd love that) or can I export the whole gemwin through Network (ie netsend) to a client patch on another computer? Thanx for helping out, Enkidu Enkidu @ www.Einheit7.de/Personal/Enkidu Mr.&Mrs.T's Music @ www.Einheit7.de/Mr-T I.A.T.W.I.A.T.I.A.

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GEM Linux and video codecs
by Etienne Desautels 14 Aug '05

14 Aug '05

Hi list, I'm developing a patch in PD/Gem on Linux where I'll have to play many hi-res videos at the same time. I did some research to find the best codec with the lowest CPU usage on Linux. I found that there's not a lot of well optimize codecs on Linux. Patrick via Ben B. told me that after a lot of testing he found that MPEG2 was the best choice. After some testing I found mostly the same thing: MPEG2 or MPEG4 are the most optimize codecs on Linux. I did also some testing with different libraries for playback. LibMPEG2 (MPlayer is using that one for MPEG2) is the fastest one for MPEG2 follow by FFMPEG. In my case I'll only play the file from start at normal speed, so it's not a problem if the codec have temporal compression. Just to give you an idea, I can play a 800x440 px, 24fps at a really good quality and using less then 15% of CPU on an P4 2,6GHz in MPEG2 with LibMPEG2 ! So here's my questions. I tried to compile Gem with FFMPEG support and it always fail in one manner or another. Or it doesn't build at all, or it build but when I load Gem I got this error message (undefined symbol: ogg_stream_init Gem: can't load library), or everything seems OK but when I try to load a movie, any type, in pix_film, FFMPEG always say that it doesn't support this format. So I can't play MPEG2 or MPEG4 in Gem, except with other less (very less) efficient libraries (it take around 50% CPU to play the same file with LibMPEG3). I did my compilation test on Unbuntu (Debian) and I try with the distro installation of FFMPEG and also with a version I compile myself (this one is more efficient in CPU usage). I tried with both Gem 0.90 and the CVS version. Same result. Could someone help me compiling Gem with a working FFMPEG ? I'm using PD 0.37 Also, what I would really prefer is to had support in Gem for LibMPEG2. Do you think it could be difficult to do ? Is it about creating a filmMPEG2.cpp and filmMPEG2.h files with the good function calls to the library and add the reference into the pix_filmNEW.cpp ? And I would like to know what's the best container (.mov, .avi, .mpg, raw) to playback video in Gem. One last thing, I was not able to use FSAA. My video card is an ATI 9600 and I'm using the binary driver with x.org. I put the lines to enable FSAA in my X86-config-4 file without any success. Any ideas ? Thanks and sorry to ask so much questions in one time. Etienne

6 19

pix_video again...
by B. Bogart 11 Aug '05

11 Aug '05

Damn, I don't have the original here. Anyhow I got pix_video to work in gem 0.90, but ONLY by using pix_videoNEW pix_video never textured anything no matter what I did. So I copied all the pix_video and video* stuff into my cvs checkout to compile it (since the makefile for gem 0.90 was not finding OpenGL on this core2 machine) And so I have an image but... the image is 16bpp rather than 24!!! No continuous colours, lots of ugly banding... pix_video (remember this is 0.90) reports: video4linux pix_videoNEW: starting transfer cap: name BT878 video (Hauppauge (bt878)) type 171 channels 4 maxw 768 maxh 480 minw 48 minh 32 picture: brightness 32768 depth 16 palette 3 channel 0 name Television type 1 flags 3 channel 1 name Composite1 type 2 flags 2 channel 2 name S-Video type 2 flags 2 channel 3 name Composite3 type 2 flags 2 setting to channel 1 buffer size 17039360, frames 8, offset 0 2129920 wanted format is 0x1908 setting cmcapture to 64x64 5 frame 0 0, format 5, width 64, height 64 GEM: pix_video: Opened video connection 14 vmmap 8D84BC8 So how can I make the depth 24? xawtv sees the video great in glorious 24bpp... I searched through the source and could not see where this is set. Thanks. B<

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GEM Capture Methods
by Enkidu (Xt#) 01 Aug '05

01 Aug '05

Hi there, I'm sorry for asking a question often asked, but I want to have it clear once and (hopefully not) for all (time): Is there a way to record or capture my [pd]-GEM output or framebuffer with any means of the software. Or do I need a capturedevice & software (witch I have, but it isn't a nice quality). If there is a way, please tell me. If not, let me ask for your experiences and know how and: when will it be implemented? I know, this has been asked often, but I'm not quiet shure if I missed some exotic way of doing it. Let me apologize for being a first time mailinglist user - hope I'm doing this right. Anyway, thanx a lot for programming and maintaining this wonderful piece of software. Enkidu Enkidu @ www.Einheit7.de/Personal/Enkidu Mr.&Mrs.T's Music @ www.Einheit7.de/Mr-T I.A.T.W.I.A.T.I.A.

3 2

curve3d acts very very odd with lots of control points OSX+Linux)
by B. Bogart 27 Jul '05

27 Jul '05

Hey all, In trying to build a 32x24 control point curve3d I realized a nasty bug. Seems that if you use curve3d with more than 8x8 (linux) and 10x10 (OSX) points you get into some trouble. In some cases it seems that the 8x9 grid on linux will simply never render a curve3d shape. If you have two curve3d's in a patch and one of them is 8x9 or bigger it actually interacts with the other 8x8 curve3d. The attached patch shows the interaction bug. Changing both to 8x8 fixes the problem. If your on OSX you'll need to change the curve3d size to 10x10 and 10x11 respectively. Happens on my fresh gem CVS on linux and an older (6 months+) CVS on OSX. Thanks! b> #N canvas 604 283 541 542 10; #N canvas 79 562 455 304 gemwin 0; #X obj 132 182 gemwin; #X obj 67 89 outlet; #X obj 67 10 inlet; #X obj 67 41 route create; #X msg 67 70 set destroy; #X msg 142 68 set create; #X msg 198 112 destroy; #X msg 132 112 create \, 1; #X obj 207 134 loadbang; #X msg 207 155 lighting 0; #X connect 2 0 3 0; #X connect 3 0 4 0; #X connect 3 0 7 0; #X connect 3 1 5 0; #X connect 3 1 6 0; #X connect 4 0 1 0; #X connect 5 0 1 0; #X connect 6 0 0 0; #X connect 7 0 0 0; #X connect 8 0 9 0; #X connect 9 0 0 0; #X restore 26 61 pd gemwin; #X msg 26 42 create; #X text 22 21 Create window:; #X obj 27 118 gemhead; #X floatatom 55 161 5 0 0 0 - - -; #X floatatom 90 161 5 0 0 0 - - -; #X floatatom 126 161 5 0 0 0 - - -; #X floatatom 95 119 5 0 0 0 - - -; #X floatatom 143 119 5 0 0 0 - - -; #X floatatom 192 119 5 0 0 0 - - -; #X obj 27 182 rotateXYZ 0 0 0; #X floatatom 113 268 5 0 0 0 - - -; #X obj 28 221 colorRGB 1 0 0; #X obj 27 139 translateXYZ -2.5 0 0; #X obj 247 118 gemhead; #X floatatom 275 161 5 0 0 0 - - -; #X floatatom 310 161 5 0 0 0 - - -; #X floatatom 346 161 5 0 0 0 - - -; #X floatatom 315 119 5 0 0 0 - - -; #X floatatom 363 119 5 0 0 0 - - -; #X floatatom 412 119 5 0 0 0 - - -; #X obj 247 182 rotateXYZ 0 0 0; #X msg 267 291 set 0 0 0 0 \$1; #X floatatom 333 268 5 0 0 0 - - -; #X obj 27 344 curve3d 8 8; #X obj 249 221 colorRGB 0 1 0; #X obj 247 139 translateXYZ -2.5 -2 0; #X msg 47 291 set 0 0 0 0 \$1; #X obj 247 344 curve3d 8 9; #X obj 338 344 cnv 15 15 15 empty empty empty 20 12 0 14 -260818 -66577 0; #X text 23 407 If you change the second curve3d to 8x8 then it works as expected. Change back to 8x9 and then the two get confused again. Seems this is happening on my OSX machine as well (except only when using a 10x11 or bigger grid) \, using a much older CVS version.; #X text 25 365 For OSX: 10 10; #X text 247 366 For OSX: 10 11; #X text 129 42 Curve3d is acting very odd when using lots of control points. My aim is at least a 32x24 curve3d.; #X connect 0 0 1 0; #X connect 1 0 0 0; #X connect 3 0 13 0; #X connect 4 0 10 1; #X connect 5 0 10 2; #X connect 6 0 10 3; #X connect 7 0 13 1; #X connect 8 0 13 2; #X connect 9 0 13 3; #X connect 10 0 12 0; #X connect 11 0 27 0; #X connect 12 0 24 0; #X connect 13 0 10 0; #X connect 14 0 26 0; #X connect 15 0 21 1; #X connect 16 0 21 2; #X connect 17 0 21 3; #X connect 18 0 26 1; #X connect 19 0 26 2; #X connect 20 0 26 3; #X connect 21 0 25 0; #X connect 22 0 28 0; #X connect 23 0 22 0; #X connect 25 0 28 0; #X connect 26 0 21 0; #X connect 27 0 24 0;

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