[X3D-Public] 2D footprint with holes in X3D

[Leonard Daly]

Cris,

There is an Open Geospatial Consortium (OGC) working on a definition for 
work with cities and buildings called CityGML 
(http://www.opengeospatial.org/standards/citygml). The Web3D Consortium 
has a liaison relationship with them. They may have worked on a lot of 
what you are trying to do. There are other groups within OGC that may 
also provide useful information. The Web3D Consortium is sponsoring a 
city modeling competition. The details are at 
http://www.web3d.org/competition/city-modeling-2015.

X3DOM V1.3 started to include 2D geometry nodes. I do not know their 
current state. The current node list is at 
http://doc.x3dom.org/author/nodes.html. See 
http://x3dgraphics.com/examples/X3dForWebAuthors/Chapter10-Geometry2D/ 
for examples in X3D of all of the 2D nodes see 
http://x3dgraphics.com/examples/X3dForWebAuthors/Chapter10-Geometry2D/.


Leonard Daly
Co-Chair, X3D WG


> Hello again,
>
> The idea is to present an entire city in 2D with X3D, so I can't do a 
> manual work with Blender because is not feasible.
> The solution of adding extra sides as Vincent said it can be easier to 
> develop but is not easy.
>
> I only need the footprint to visualize. Textures are not going to be 
> used for now. 2D geometries are supported in X3DOM? Beucase I have to 
> visualize the obtained X3D using X3DOM.
>
> Thanks again!
>
> Best regards
>
> 2014-12-15 16:19 GMT+01:00 Leonard Daly <web3d at realism.com 
> <mailto:web3d at realism.com>>:
>
>     Cris Lacumba,
>
>     There are a lot of ways to construct a polygonal representation of
>     a shape. The way you choose depends on what you are going to do
>     with the shape, how it needs to be textured, and the tools you
>     have available for your development. For IndexedFaceSet all of the
>     polygons must be convex (no "L" shaped ones). Most graphic systems
>     will convert the IFS to triangles, so if you want detailed
>     control, you might want to create your own triangles. This can be
>     particularly important if any polygon is a saddle point. Which way
>     do you triangulate - top-left to bottom-right or top-right to
>     bottom-left.
>
>
>        -1          +1
>           +-------+
>           |       |
>           |       |
>           +-------+
>         +1        -1
>
>
>     You may also wish to look into the 2D shapes (see
>     http://x3dgraphics.com/examples/X3dForWebAuthors/Chapter10-Geometry2D/).
>
>
>     Vince and Doug have offered two solutions. If neither of these
>     works for you, please tell us more how the footprint will be used
>     and the tools you have available, other specific solutions can be
>     offered.
>
>
>     Leonard Daly
>
>
>
>>     Hello to all,
>>
>>     I'm trying to represent the 2D footprint of a building.However,
>>     some of them have patios or holes inside the footprint. (see the
>>     attachment)
>>     How can I represent that using IndexedFaceSet?
>>
>>     Thanks in advance
>>
>>     Best regards
>>
>>     Cris
>>
>>
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>
>
>     -- 
>     *Leonard Daly*
>     X3D Co-Chair
>     Cloud Consultant
>     President, Daly Realism - /Creating the Future/
>
>     _______________________________________________
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>     X3D-Public at web3d.org <mailto:X3D-Public at web3d.org>
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>


-- 
*Leonard Daly*
X3D Co-Chair
Cloud Consultant
President, Daly Realism - /Creating the Future/
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