[X3D-Public] Problem in X3D

[Bederov, Sergey]

Hello Iñaki,

An ElevationGrid extends in the XZ plane, the height field containing Y coordinates of the vertices. In your example, the height values are near zero, so the shape is near the XZ plane. The Transform adds 3193 to Y, shifting the ElevationGrid 3 kilometres up. On the other hand, the house doesn't have a Transform, and its Y coordinates range from -9 to -3; therefore, the house is 3 kilometres below the ground.

http://www.web3d.org/x3d/specifications/OLD/ISO-IEC-19775-X3DAbstractSpecification/Part01/components/geometry3D.html#ElevationGrid

                                                                                Sergey Bederov


From: x3d-public-bounces at web3d.org [mailto:x3d-public-bounces at web3d.org] On Behalf Of Inaki Prieto Furundarena
Sent: Thursday, May 03, 2012 6:36 PM
To: x3d-public at web3d.org
Subject: [X3D-Public] Problem in X3D

Hi all,

I'm generating the Digital Terrain Model in X3D.
I also have some buildings that have to be placed just above of the DTM.

However, I get a different result (see attached picture)

I think the error is inside the DTM.
I'm using the ElevationGrid to get this.

<?xml version="1.0" encoding="UTF-8" standalone="no"?><X3D xmlns="http://www.web3d.org/specifications/x3d-namespace" height="400px" id="the-x3d-element" showLog="true" showProgress="bar" showStat="true" width="400px" x="0px" y="0px">
<Scene id="root">
<Transform translation="-2171.0 3193.0 0">
<Shape><Appearance><Material/><ImageTexture url="mdt.jpg"/></Appearance>
<ElevationGrid height="-0.26098633 0.5960083 1.7449951 ........" solid="false" xDimension="174" xSpacing="25.0" zDimension="334" zSpacing="25.0"/>
</Shape></Transform></Scene></X3D>

Buildings are generated in following way:
<?xml version="1.0" encoding="UTF-8" standalone="no"?><X3D xmlns:xsd="http://www.w3.org/2001/XMLSchema-instance" profile="Immersive" version="3.3" xsd:noNamespaceSchemaLocation="http://www.web3d.org/specifications/x3d-3.3.xsd"><Scene><Shape><Appearance><Material diffuseColor="1 1 1"/></Appearance><IndexedFaceSet convex="false" coordIndex="0 1 2 3 4 -1 5 6 7 8 9 -1 10 11 12 13 14 -1 15 16 17 18 19 -1 20 21 22 23 24 -1 "><Coordinate point="-171.59 -9.0 1.6 -171.59 -9.0 8.04 -172.34 -6.0 8.04 -172.34 -6.0 1.6 -171.59 -9.0 1.6 -171.59 -9.0 2.42 -171.59 -9.0 8.04 -171.59 -9.0 8.04 -171.59 -9.0 2.42 -171.59 -9.0 2.42 -160.12 -6.5 -0.61 -160.12 -6.5 8.04 -171.59 -9.0 8.04 -171.59 -9.0 -0.61 -160.12 -6.5 -0.61 -161.16 -3.5 -0.63 -161.16 -3.5 8.04 -160.12 -6.5 8.04 -160.12 -6.5 -0.63 -161.16 -3.5 -0.63 -172.34 -6.0 1.6 -172.34 -6.0 8.04 -161.16 -3.5 8.04 -161.16 -3.5 1.6 -172.34 -6.0 1.6 "/></IndexedFaceSet></Shape></Scene></X3D>



It seems like axes were changed.

Some idea?

Thanks in advance

Best regards

--
Iñaki Prieto Furundarena

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://web3d.org/pipermail/x3d-public_web3d.org/attachments/20120505/c775338e/attachment.html>