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Can someone plz explain touchlib sourcecode ? 
 
Mj
Posted: 02 April 2008 09:16 AM   [ Ignore ]
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can someone who knws VC++ .NET explain in short, how the code works ??? ......
i am confused with the usage of -> and * .....

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Ancalagon
Posted: 02 April 2008 10:59 AM   [ Ignore ]   [ # 1 ]
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My advice is to buy a book to learn C++. Your question suggests that you are new to C++, so you first need to grasp the basic concepts of C++.

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Adam
Posted: 02 April 2008 12:19 PM   [ Ignore ]   [ # 2 ]
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I am currently working on code documentation and a short tutorial for the Google Summer of Code students so they can ramp up quickly. I will likely be done by the end of this week.  It is difficult to stay on top of commenting other people’s code while you’re trying to fix it too!  Most people are focusing on developing applications using Flash or AIR instead of tweaking OSC or touchlib.  I am working on both touchlib and a better configapp.  If you aren’t familiar with C++ you might want to start with the Flash or AIR application programming. smile

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Mj
Posted: 02 April 2008 12:56 PM   [ Ignore ]   [ # 3 ]
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@Adam ....
can u gimme some rough idea regarding the touchlib OSC program ?? .....
it wud be gr8 to see a documentation .....

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cerupcat
Posted: 02 April 2008 01:46 PM   [ Ignore ]   [ # 4 ]
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Hi Adam,

It’s great to hear you’re working on some improvements. I agree, they’re definitely needed. I think people are more caught up in making applications in general right now. I’ve been wanting to fix some things, but haven’t had the chance to learn enough cpp yet to make it worthwhile. I can’t wait to test out your improvements and read over the documentation. Sounds great!

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jimihertz
Posted: 03 April 2008 02:14 PM   [ Ignore ]   [ # 5 ]
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great , a lantern to show the darkside !!

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Adam
Posted: 03 April 2008 03:51 PM   [ Ignore ]   [ # 6 ]
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I am currently commenting CTouchScreen.cpp which I think would be the most helpful for beginners to really grok. I don’t have permission to include the comments in the latest code, but I will be posting it here and on my website for viewing or downloading.  It is long, boring, tedious work to comment someone else’s code.  I haven’t contributed any code yet, so I’m bound to misinterpret code or explain something wrong, but I hope I do well enough for the masses.

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Adam
Posted: 06 April 2008 09:12 PM   [ Ignore ]   [ # 7 ]
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Here you go! smile I hope this helps a little.  I’m going to try to have a more in-depth, easier to read explanation later.

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CTouchScreen.rar  (File Size: 9KB - Downloads: 220)
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Mj
Posted: 07 April 2008 11:09 AM   [ Ignore ]   [ # 8 ]
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thnx man !!! ....
tht will surely help !! ......
waiting for a few more though ... [wink]

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ding
Posted: 06 May 2008 10:01 AM   [ Ignore ]   [ # 9 ]
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I figure this would be the tread to ask this question. I’ve been looking at the source code to figure this out without much success.
How does touchlib figure out if the blob from the last frame is the same as the blob from this frame? I think it happens here but its all a bit confusing.

// now figure out the 'error' for all the blobs in the current frame
    

        for(i=0; i<cursize; i++)
        {
                current[i].error.clear();
                current[i].closest.clear();

                for(j=0; j<prevsize; j++)
                {
                        float error = 0.0f;
                        error = getError((*prev)[j], current[i]);
                        current[i].error.push_back(error);
                        current[i].closest.push_back(j);
                }
        }


       ..............All the way to here.........

                    if(best_error_ndx != -1)
        {
                for(i=0; i<cursize; i++)
                {
                        if(matrix[best_error_ndx][i] != -1)
                                current[i].ID = (*prev)[matrix[best_error_ndx][i]].ID;
                        else
                                current[i].ID = -1;

                        if(current[i].ID != -1)
                        {
                                CFinger *oldfinger = &(*prev)[matrix[best_error_ndx][i]];
                                current[i].delta = (current[i].center - oldfinger->center);
                                current[i].deltaArea = current[i].area - oldfinger->area;
                                current[i].predictedPos = current[i].center + current[i].delta;
                                current[i].displacement = oldfinger->displacement + current[i].delta;
                        } else {
                                current[i].delta = vector2df(0, 0);
                                current[i].deltaArea = 0;
                                current[i].predictedPos = current[i].center;
                                current[i].displacement = vector2df(0.0f, 0.0f);
                        }
                }

                //printf("Best index = %d\n", best_error_ndx);
        }

Thanks,

Alain

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icube
Posted: 16 June 2008 03:24 PM   [ Ignore ]   [ # 10 ]
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Seeking for better documentation of touchlib here as well… like class diagrams etc.

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Adam
Posted: 16 June 2008 03:46 PM   [ Ignore ]   [ # 11 ]
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I am trying to comment the source so that it’s compatible with Doxygen formats.  Doxygen provides meaningful graphs on class inheritance and dependencies pretty much automatically once the code is properly commented.  That is a *huge* task that I am working on a little bit each day. Next few weeks and I should have everything up on a website for everyone’s browsing pleasure.

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nuiman
Posted: 17 June 2008 02:20 AM   [ Ignore ]   [ # 12 ]
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Hey Adam let me or Cerupcat know if you need any help on that… I’m sure its a daunting task.

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icube
Posted: 17 June 2008 07:58 AM   [ Ignore ]   [ # 13 ]
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Adam - 16 June 2008 03:46 PM

I am trying to comment the source so that it’s compatible with Doxygen formats.  Doxygen provides meaningful graphs on class inheritance and dependencies pretty much automatically once the code is properly commented.  That is a *huge* task that I am working on a little bit each day. Next few weeks and I should have everything up on a website for everyone’s browsing pleasure.

great! can’t wait to see… anyway will u be explaining the algorithm for the detection and tracking?

cheers

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Adam
Posted: 17 June 2008 04:16 PM   [ Ignore ]   [ # 14 ]
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Okay, I had time today to run the touchlib rev.395 through Doxygen and post it to my site. It’s not perfect or pretty, but we’ll fix that.  Remember that it’s nothing at all like a tutorial but definitely a good read for a newbie to poke around in. Just click on the touchlib button on my home page http://easterisland-llc.com

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Ruly
Posted: 18 June 2008 05:52 AM   [ Ignore ]   [ # 15 ]
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great job, good link adam!!

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