[x3d-public] Proposed new Profile

[Leonard Daly]

Greg,

The intent of the model profile is just to contain model information. 
Viewpoints (ortho or otherwise) and ClipPlane  is not intrinsic to the 
model, and (I believe) should not be included.

ColorRGBA and Color are both included.

I intentionally left out many/most of the other items listed because I 
believed that the digital content creation (DCC) tool would easily 
create 2D shapes. Can you please describe how you use the 2D geometry 
nodes? Is there a reason that the various Line nodes could not be used?

An issue I have with the pre-defined shapes (Box, Cylinder, Sphere, 
Text, etc.) is that there are many ways to triangulate these. What one 
person may consider to be a good triangulation is too course or too fine 
for another and may also depend on the target device. Is triangulation 
of these shapes an issue for you? Also, Text has the added disadvantage 
of font management.

I did not address X3D Statements. I agree that the UNIT statement is an 
important part of a model format.

Leonard Daly



> On 1/22/2018 8:43 AM, Leonard Daly wrote:
>>
>> The existing X3D profiles were designed for run-time environments. 
>> Since those original definitions, the marketplace has changed. There 
>> is need of an open, standardized formats for models that supports 
>> conversion to and from existing formats such as FBX, OBJ, glTF, and 
>> others. There are some tools that do that conversion, but tend to be 
>> expensive or limited in capability. To address this hole in the 3D 
>> eco-system, I am proposing new profiles to handle the archive storage 
>> for models. The first proposal is for static models. These are models 
>> without articulation, joints, sliders, etc. The profile supports the 
>> way models are built in the industrial/professional world of games, 
>> entertainment, CAD, and medical -- at least to the best of my 
>> understanding.
>>
>> The collection of nodes handles output functionality from Maya and 
>> Blender plus other tools. It includes some advanced structures such 
>> as NURBS, CAD, and Volume; and does not include simple structures as 
>> simple geometry (Box, Sphere, etc.). I looked at what the tools 
>> output and could not find instances where simple structures were 
>> exported. This allows important features of the model (e.g., a NURBS 
>> surface) to exist and triangulation to happen later in the process.
>>
>> The details are at 
>> http://realism.com/blog/proposed-x3d-profile-static-model. The post 
>> includes a list of included nodes sorted by their profile.
>>
>> -- 
>> *Leonard Daly*
>> 3D Systems & Cloud Consultant
>> LA ACM SIGGRAPH Past Chair
>> President, Daly Realism - /Creating the Future/
>>
>>
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>> x3d-public at web3d.org
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> For reference, UCSF Chimera, a free molecular modeling program that 
> exports X3D, uses the Interchange profile for static scenes with the 
> following extra component levels listed in the header, depending on 
> what is exported: Geometry2D: 2, Navigation: 3, Rendering: 5, Shape: 
> 3, and Text: 1.  So please include Box, Sphere, OrthoViewpoint, 
> ColorRGBA, ClipPlane, and Text in static scenes. And we would like to 
> add, available in X3D 3.3: <unit category='length' name='ångström' 
> conversionFactor='1e-10'/>. So please include units in the profile 
> description too.
>
>    HTH,
>
>    Greg
>

-- 
*Leonard Daly*
3D Systems & Cloud Consultant
LA ACM SIGGRAPH Past Chair
President, Daly Realism - /Creating the Future/
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