<div dir="ltr">I think there's a little bit of communication issue here. <div><br></div><div>You are saying you want the look of symbol.jpg? How do you mean "rubber mode"? What is "rubber" about it?</div><div><br></div><div>You could possibly create a dummy quad with the background blue color on it that encompasses the screen-space bounding box of the green line, and render it after the black line but before the green one. Would that give you the effect you want?</div></div><br><div class="gmail_quote"><div dir="ltr">On Tue, Sep 11, 2018 at 12:50 PM Christoph Dohmen <<a href="mailto:christoph.dohmen@cae.de">christoph.dohmen@cae.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi all,<br>
<br>
I'm looking for some inspiration for solving the following 'problem':<br>
Currently I'm drawing basic line geometries like in attachment line.png. And I'm able to draw items above the geometries (combo.png). But the final goal must be some kind of 'rubber mode' which makes the geometry transparent and keeps the background (liek in symbol.png).<br>
<br>
What may be the technique to solve this?<br>
<br>
Thank you!<br>
<br>
Cheers,<br>
Christoph<br>
<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="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:12.8000001907349px">Legal/IP •</span><span style="font-size:12.8000001907349px"> </span><span style="font-size:12.8000001907349px">Forensics •</span><span style="font-size:12.8000001907349px"> </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>