<div dir="ltr">Those max screen diameter values are using by projecting the diameter of the bounding sphere (usually encoded in any Group-derived nodes) through the modelview/projection matrix to assess its on-screen extent in pixels. If it is above or below the threshold defined by the max screen diameter field, that triggers a change in the selection of children.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Sep 18, 2019 at 12:55 PM <<a href="mailto:shlem@netvision.net.il">shlem@netvision.net.il</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<div dir="ltr">
<div style="font-size:12pt;font-family:Calibri;color:rgb(0,0,0)">
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<div>Hi</div>
<div>I wrote my own renderer based on DirectX.</div>
<div>Everything goes nice except one issue.</div>
<div>How I decide to show the some tile/node or its children regarding to
current zoom level?</div>
<div>Does each tile/none have some hints? (like 3mx files for example, that
have MaxScreenDiameter field)</div>
<div>Thanks in advance</div>
<div>Leonid Shikhmatov</div></div></div></div></div>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div style="text-align:center">Chris 'Xenon' Hanson, omo sanza lettere. Xenon@AlphaPixel.com <a href="http://www.alphapixel.com/" target="_blank">http://www.alphapixel.com/</a></div><div style="text-align:center">Training • Consulting • Contracting</div><div style="text-align:center">3D • Scene Graphs (Open Scene Graph/OSG) • OpenGL 2 • OpenGL 3 • OpenGL 4 • GLSL • OpenGL ES 1 • OpenGL ES 2 • OpenCL</div><div style="text-align:center"><span style="font-size:12.8px">Legal/IP •</span><span style="font-size:12.8px"> </span><span style="font-size:12.8px">Forensics •</span><span style="font-size:12.8px"> </span>Imaging <span style="font-size:12.8px">•</span><span style="font-size:12.8px"> </span><span style="font-size:12.8px">UAVs </span><span style="font-size:12.8px">• GIS • GPS • osgEarth • Terrain • Telemetry • Cryptography • LIDAR • Embedded • Mobile • iPhone/iPad/iOS • Android</span></div><div style="text-align:center"><a href="https://twitter.com/alphapixel" target="_blank">@alphapixel</a> <a href="http://facebook.com/alphapixel" target="_blank">facebook.com/alphapixel</a> (775) 623-PIXL [7495]<br></div></div></div></div></div></div>