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Dear Max,
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<div>Thanks for your reply and suggestion. Your approach was the first thing I tried, but it did not appear to work when the surfaces and volumes were created from imported STL files.</div>
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<div>Perhaps there is difference between your approach and my original approach?</div>
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<div>Thanks again,</div>
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<div>Peter.</div>
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<br style="font-size: 14px; font-family: -apple-system, BlinkMacSystemFont, sans-serif;">
Associate Professor Peter Johnston (FAustMS, FIMA)<br style="font-size: 14px; font-family: -apple-system, BlinkMacSystemFont, sans-serif;">
School of Environment and Science<br style="font-size: 14px; font-family: -apple-system, BlinkMacSystemFont, sans-serif;">
Griffith University | Nathan | QLD 4111 | Technology (N44) Room 3.19<br style="font-size: 14px; font-family: -apple-system, BlinkMacSystemFont, sans-serif;">
T +61 7 373 57748| F +61 7 373 57656 Email p.johnston@griffith.edu.au</div>
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On 20 Mar 2019, 1:51 AM +1000, Max Orok <morok@mevex.com>, wrote:<br>
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<div>Hi Peter,<br>
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<div>For two volumes (including STL imports), you can find the volume between them using the `BooleanDifference` command.<br>
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<div>Here is a small example:<br>
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<div>SetFactory("OpenCASCADE");<br>
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Box(1) = {-10, -10, -10, 20, 20, 20};<br>
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Sphere(2) = {0, 0, 0, 10};<br>
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BooleanDifference{ Volume{1}; Delete; }{ Volume{2}; Delete; }<br>
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<div>Also, depending on the number of shapes you're importing, the `Coherence` command might also help if you find that volumes don't end up sharing mesh faces.<br>
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<div>Picture after using a clipping plane:<br>
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<div><image.png><br>
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<div dir="ltr" class="gmail_attr">On Tue, Mar 19, 2019 at 2:41 AM Peter Johnston <<a href="mailto:p.johnston@griffith.edu.au">p.johnston@griffith.edu.au</a>> wrote:<br>
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Hello again,
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<div>I’m sorry to keep asking questions about STL files, but there is something else that has arisen.</div>
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<div>I import two surfaces, one inside the other as follows:</div>
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<p style="margin:0px;color:rgb(0,0,0);background-color:rgb(255,255,168)">Merge "inner_shape.stl";</p>
<p style="margin:0px;color:rgb(0,0,0);background-color:rgb(255,255,168)">Mesh.Smoothing=100;</p>
<p style="margin:0px;color:rgb(0,0,0);background-color:rgb(255,255,168)">//+</p>
<p style="margin:0px;color:rgb(0,0,0);background-color:rgb(255,255,168)">Surface Loop(1) = {1};</p>
<p style="margin:0px;color:rgb(0,0,0);background-color:rgb(255,255,168)">//+</p>
<p style="margin:0px;color:rgb(0,0,0);background-color:rgb(255,255,168)">Volume(1) = {1};</p>
<p style="margin:0px;color:rgb(0,0,0);background-color:rgb(255,255,168)">//+</p>
<p style="margin:0px;color:rgb(0,0,0);background-color:rgb(255,255,168)">Merge "outer_shape.stl";</p>
<p style="margin:0px;color:rgb(0,0,0);background-color:rgb(255,255,168)">//+</p>
<p style="margin:0px;color:rgb(0,0,0);background-color:rgb(255,255,168)">Surface Loop(2) = {2};</p>
<p style="margin:0px;color:rgb(0,0,0);background-color:rgb(255,255,168)">//+</p>
<p style="margin:0px;color:rgb(0,0,0);background-color:rgb(255,255,168)">Volume(2) = {2};</p>
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<div class="gmail-m_3045325878615082150matchFont">Can I mesh the space in between the two shapes? </div>
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<div class="gmail-m_3045325878615082150matchFont">Thanks,</div>
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<div class="gmail-m_3045325878615082150matchFont">Peter.</div>
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<div class="gmail-m_3045325878615082150matchFont">---------------------------------------------------------------------<br style="font-size:14px;font-family:-apple-system,BlinkMacSystemFont,sans-serif">
<br style="font-size:14px;font-family:-apple-system,BlinkMacSystemFont,sans-serif">
Associate Professor Peter Johnston (FAustMS, FIMA)<br style="font-size:14px;font-family:-apple-system,BlinkMacSystemFont,sans-serif">
School of Environment and Science<br style="font-size:14px;font-family:-apple-system,BlinkMacSystemFont,sans-serif">
Griffith University | Nathan | QLD 4111 | Technology (N44) Room 3.19<br style="font-size:14px;font-family:-apple-system,BlinkMacSystemFont,sans-serif">
T +61 7 373 57748| F +61 7 373 57656 Email <a href="mailto:p.johnston@griffith.edu.au" target="_blank">
p.johnston@griffith.edu.au</a></div>
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<div>Max Orok</div>
<div>Contractor<br>
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