[x3d-public] Seed for a project

Sun Aug 13 06:47:32 PDT 2023

Or alternatively, both x3d browser and debugger can join a party line.

On Sun, Aug 13, 2023 at 8:45 AM John Carlson <yottzumm at gmail.com> wrote:

> Do you guys think the x3d browser should contact the debugger or vica
> versa?  I’m thinking we don’t want an open port the browser, so the user
> should enter host and port of debugger, and the debugger may show what the
> user should type in.
>
> On Sun, Aug 13, 2023 at 8:23 AM John Carlson <yottzumm at gmail.com> wrote:
>
>> I am thinking SAI could be a good way to do this.
>>
>> On Sun, Aug 13, 2023 at 8:14 AM John Carlson <yottzumm at gmail.com> wrote:
>>
>>> Good question about BVH!  I am proposing a new mocap format that doesn’t
>>> need a hierarchy, and can do streaming, graph or grid data.
>>>
>>> S:structure of data, G for grid, H for tree, D for D for DAG, C for
>>> cycles
>>> V: name or id of structure
>>> F: from joint name and/or id
>>> T:to joint name and/or id
>>> O: out name
>>> B:out data (beginning)
>>> I: in name
>>> E:in data  (ending)
>>> .
>>> .
>>> .
>>> etc.
>>>
>>> The animation is done like:
>>> J:Joint id or name
>>> C:Joint class or type (may change)
>>> A:Joint alias or DEF (optional)
>>> X:X location, unit (unit may be defaulted, no unit for scaling)
>>> Y:Y location, unit (ditto)
>>> Z:Z location, unit (ditto)
>>> T:frame or time, unit (ditto)
>>> .
>>> .
>>> .
>>> etc.
>>>
>>> -V: remove structure
>>>  -J: remove joint
>>> -F: from joint name and/or id
>>> -T: to joint name and/or id
>>>
>>> To remove joint, bones or routes.
>>>
>>> Later, I will provide 4 data points per joint over time, for impact
>>> simulator I/O grid
>>>
>>> J: Joint, as above
>>> U:up data
>>> D:down data
>>> R:right data
>>> L:left data
>>>
>>> Plus ways to remove data by adding a - in front or behind the label and
>>> a leading or a trailing + to add data
>>>
>>> This needs to be generalized. Think how to do hypergraphs. More verbose
>>> would be an option,  IDK, i don’t want to reinvent a document format.
>>>
>>> Obviously inspired by Katy’s format!
>>>
>>> Contributions welcome.
>>>
>>> John
>>>
>>>
>>>
>>> On Sun, Aug 13, 2023 at 6:24 AM Joe D Williams <joedwil at earthlink.net>
>>> wrote:
>>>
>>>> Why concern about BVH?
>>>>
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: John Carlson <yottzumm at gmail.com>
>>>> Sent: Aug 12, 2023 7:48 PM
>>>> To: GPU Group <gpugroup at gmail.com>
>>>> Cc: X3D Graphics public mailing list <x3d-public at web3d.org>
>>>> Subject: Re: [x3d-public] Seed for a project
>>>>
>>>>
>>>> I guess the best way to do the translations and rotations in BVH is
>>>> from the root to the extremities?  Get segments close to root, then work
>>>> down the tree.
>>>>
>>>> What about multiple parents in the DAG?  How is this resolved?  As
>>>> separate children?
>>>>
>>>> I’m pretty sure BVH is a tree?  Anyone know?
>>>>
>>>> John
>>>>
>>>> On Sat, Aug 12, 2023 at 12:00 PM GPU Group <gpugroup at gmail.com> wrote:
>>>>
>>>>> > 1) provide a way to convert X3D nodes and ROUTEs to BVH with
>>>>> animation.  This will require converting routes/segments over time to
>>>>> translations and rotations. Help is requested.
>>>>> One fuzzy idea: use the nodes and routes to animate, and capture the
>>>>> animation at a choke point in the web3d browser. A good choke point is
>>>>> where the browser applies BVH animations to the HAnim. In freewrl there are
>>>>> a few spots where it calls update_jointMatrixFromMotion() and in theory
>>>>> there could be another call there update_MotionFromJointMatrix() which goes
>>>>> the other way, converting a joint matrix into a bvh motion for recording to
>>>>> a file, with frame timestamp.
>>>>>
>>>>>
>>>>>
>>>>> On Sat, Aug 12, 2023 at 10:14 AM John Carlson <yottzumm at gmail.com>
>>>>> wrote:
>>>>>
>>>>>
>>>>>> Here's the seed for a Java (possibly X3D-Edit) project. A graph/grid
>>>>>> editor.
>>>>>>
>>>>>> https://github.com/coderextreme/impact.dir/tree/master/impactVL
>>>>>>
>>>>>> I was thinking of adding:
>>>>>>
>>>>>>  JSON/XML/VRML/BVH/MediaPipeHolistic/JavaSerialized/OpenUSD  I/O,
>>>>>> beyond native.
>>>>>>
>>>>>> There seems to be a slight issue with input right now, at least with
>>>>>> the sort* input files in Impact.java
>>>>>>
>>>>>> Make a copy of a file externally before modifying in the tool,
>>>>>> there's no way to save to another file currently in Impact.java.
>>>>>>
>>>>>> The goals are:
>>>>>>
>>>>>> 1) provide a way to convert X3D nodes and ROUTEs to BVH with
>>>>>> animation.  This will require converting routes/segments over time to
>>>>>> translations and rotations. Help is requested.
>>>>>>
>>>>>> 2) provide a way to visualize ROUTEs with Java (anyone else have
>>>>>> something?)
>>>>>>
>>>>>> 3)  provide different naming convention for different I/O
>>>>>>
>>>>>> 4) take input from MediaPipe Holistic (Python) and convert to BVH.
>>>>>>
>>>>>> 5) provide a way to debug X3D events in Java.
>>>>>>
>>>>>> There are already 2 different visualizations. I hope to add more.
>>>>>> One (Cell4x4) is based on Jed Donnelly's graphics (see images folder)
>>>>>> scanned from his Impact project (hence the name). I would like to use this
>>>>>> with permission, but I haven't heard from him.  The Java is mine, based on
>>>>>> his original idea (not his or other's code).
>>>>>>
>>>>>> Note that I haven't tested the Cell.java program much recently.
>>>>>> Impact.java is what Jed called the "Flow" or "Floweth" language, but his
>>>>>> idea was to create a textual language.  But a challenge is making the 2
>>>>>> visualizations to work together.  The textual language will be implemented
>>>>>> in X3D/BVH. I don't have a reason to create a new language, nor do I want
>>>>>> to.
>>>>>>
>>>>>> Note that I already have the idea for "Inlines" or expanding nodes
>>>>>> into another window.  I'm not sure how well it's implemented.  I'm not sure
>>>>>> about I/O of nested nodes right now.
>>>>>>
>>>>>> This seems like a lot of fun, and maybe even useful, as opposed to
>>>>>> X3D JSON.
>>>>>>
>>>>>> Ant and Makefiles provided.  Not gradle. Too many garbage files to
>>>>>> worry about iwith gradle--I'm not sure why they have all of them. If
>>>>>> someone wants to provide maven or gradle, that would be cool. Ant is okay
>>>>>> in Git for Windows.  If I have to fall back to Makefiles, I can use Cygwin.
>>>>>>
>>>>>> Any problems, file an issue with
>>>>>> https://github.com/coderextreme/impact.dir/issues.  There's one
>>>>>> waiting for you to close, Jed.
>>>>>>
>>>>>> John
>>>>>>
>>>>>>
>>>>>>
>>>>> _______________________________________________
>>>>>> x3d-public mailing list
>>>>>> x3d-public at web3d.org
>>>>>> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>>>>>
>>>>>
>>>>
>>>
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