Pd-list February 2007

pd-list@lists.iem.at

148 participants
295 discussions

[Gem] angles -> vector translation
by Roman Haefeli 01 Mar '07

01 Mar '07

hello everyone i am working on a gem-patch. i want to make the user feel like flying freely through the 3d-space (what an ugly old-schooled sentence, i know ;-). the problem i have is, that when i rotate the world, i would like the user to fly in the same direction, so that when moving the vanishing point stays in the middle of the gemwin to create the feeling of always looking forward. in other words, i need to 'translate' the rotation done with [rotateXYZ] by the three axes X, Y and Z to a vector {x,y,z}, so that the user flies in the same direction as he is looking to. i was told that what i want to achieve is done with a matrix, but unfortunately my mathematical knowledge is far from being able to set it up myself. examples: the user is looking to: vector to translate ('move'): angle X = 0° Vx = 0 angle Y = 0° Vy = 0 angle Z = 0° Vz = 1 angle X = 0° Vx = -1 angle Y = 90° Vy = 0 angle Z = 0° Vz = 0 angle X = 90° Vx = 0 angle Y = 0° Vy = 1 angle Z = 0° Vz = 0 how can i compute the correct vector for any set of angles? sorry for any inconvenience because of terms that might be used in the wrong way. i am not a mathematician and i hope, it is still clear, what i want to achieve. many thanks in advance for any help. roman ___________________________________________________________ Telefonate ohne weitere Kosten vom PC zum PC: http://messenger.yahoo.de

6 12

[Gem]: gem-pointer and [list] OR slow [repeat]
by Roman Haefeli 01 Mar '07

01 Mar '07

hi all it's a known trick to use [repeat] from zexy in a gem render chain to produce funny effects and to multiply the rendering of the attached objects. the problem i have here, is that i use a [repeat] with a very high iteration number (>1000). after the [repeat 1000] some stuff is calculated and read from tables and then sent to gem-objects on each iteration. this works well, but on each render-cycle i get a short dropout. i use the default framerate of 20, that should make 50ms per frame, but with [realtime] i measure around 70ms. i could live with that, but i thought that this could be optimized. it's the concept of pd, that when a message is triggered, it gets completely processed in the same dsp-cycle. but when working with gem, this makes absolutely no sense, since the time between each render cycle is much higher (50ms in my case). that's why i wanted to build a slow repeat with [until] and [list], so that i can spread the 1000 iterations over the whole 50ms. unfortunately it is not possible to store a gem pointer with [list]. when i connect a [gemhead] to the right inlet of a [list] and turn rendering on, pd immediately crashes (at least here, i didn't test on other computers). i tried also to bang 'manually' the [gemhead] instead, but then the iterations don't have any effect (no objects are multiplied). is there any way to store a gem pointer? or is there another way of producing slow repeats of a gem pointer? any help appreciated! roman ___________________________________________________________ Der frühe Vogel fängt den Wurm. Hier gelangen Sie zum neuen Yahoo! Mail: http://mail.yahoo.de

7 13

fn delete
by marius schebella 01 Mar '07

01 Mar '07

Hi, speaking about annoying things so much leads me to post another problem, that fn + delete, which usually deletes the character right of the cursor on osx, does not work in pd. there appears a funny rectangle character. maybe this one is easier to solve? I also had that problem on some linux machines, btw. whereas on windows it was not possible at all to delete what is right of the cursor, if I remember correctly. marius.

5 5

Tower of Hanoi
by Steffen 28 Feb '07

28 Feb '07

Hey list, I've toyed with an implementation of a solution to the Tower of Hanoi problem in Pd. It ended up being too simple once i skipped trying to use the recursive algorithm that normally is used to solve the problem. Instead i've used an iterative algorithm that uses a binary representation of each move, and from that the disk number being moved, from where it's moved and where to, is fairly simply calculations using the bitwise operators that ships with Pd ( - which I thought i was gonna implement that first, but no). See for example the wikipedia entry on the topic for more info. Attached is the patch, made as an abstraction, and a help file that demonstrate it. Any comment is very welcome! Best, Steffen

2 2

retrieving DIO errors from within a patch
by Matthias Blau 28 Feb '07

28 Feb '07

Hi list, I wonder whether it is possible to retrieve information about DIO errors (specifically, AD/DA sync errors) from within a patch? If so, can this be made in one and the same way for different OSs? Thanks for suggestions, Matthias

1 0

a good way to remove selected data objects?
by Rich E 28 Feb '07

28 Feb '07

Hi all, I was wondering if anyone has come across a good way to selectively remove a visualized data structure, hopefully without having to use the mouse. Eg, I'd like to be able to select something based on the position of my tablet pen and then remove it, as well as maybe clearing a corresponding array and whatnot. So far, the only thing I can think of is correlating a deselect message with a backspace [keyup], which would then give me a pointer to the structure removed with backspace. This, however, isn't ideal, because there may be other data structures that need to be removed that are related to the one manually removed. Also, I like avoiding the use of the trackpad... but I don't know what is currently possible in this area. I remember there being talk on the subject, but cannot find the posts. regards, Rich

2 1

Re: Feature Requests for Google Summer of Co
by Matteo Sisti Sette 27 Feb '07

27 Feb '07

I don't know if this is something worthy for the summer of code... or at all... but I would love PDP to work on Windows

6 8

>~ and <~ becommes _~ and __~ in windows...
by Thomas Jeppesen 27 Feb '07

27 Feb '07

because windows want allow these characters: \, /, :, *, ?, ", >, < and | in a file name. what solution do you suggest to this "problem" besides medical surgery of patches and "installing Linux" which is a whole different issue that I'll come back to in another post. Cheers! Thomas

5 4

gem - fading
by Nikola Jeremic 27 Feb '07

27 Feb '07

hi list 1. i would like to "fade" my gem objects - fade to color (black), or fade to alpha channel. Is there any other way how i can make my object vissible/invissible (but not sending 0-1 to gem_win). thanx n. -- www.echoplex-label.de/njeremic

3 3

[OT] fluxbox/X11 keymappings
by Derek Holzer 27 Feb '07

27 Feb '07

Anyone (with a one-button Mac, perhaps) know how to emulate a "right-click" or "control-click" in Fluxbox/X11? Would be handy while patching with my ppc-linux laptop when I forget the USB mouse. thx, d. -- derek holzer ::: http://www.umatic.nl ---Oblique Strategy # 50: "Distort time"

3 3

← Newer
1
2
3
4
5
6
7
...
30
Older →

Jump to page:

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

Pd-list February 2007