geom/doc/salome/gui/GEOM/measurement_tools.htm

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2005-11-24 20:34:00 +05:00
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<title>Measurement Tools</title>
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<h1>Measurement Tools</h1>
<h3>Point Coordinates</h3>
<p class="whs1">import geompy</p>
<p>&nbsp;</p>
<p># create a point</p>
<p class="whs1">point = geompy.MakeVertex(15,
23, 80)</p>
<p>&nbsp;</p>
<p># get point's coordinates and check its values</p>
<p class="whs1">coords = geompy.PointCoordinates(point)</p>
<p class="whs1">if coords[0] != 15
or coords[1] != 23 or coords[2] != 80 :</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;print
&quot;Coordinates of point must be (15, 23, 80), but returned (&quot;,
coords[0], &quot;, &quot;, coords[1], &quot;, &quot;, coords[2], &quot;)&quot;</p>
<p class="whs1">else :</p>
<p><span style="font-family: 'Lucida Console', monospace;">&nbsp;&nbsp;&nbsp;&nbsp;print
&quot;All values are OK.&quot;</span> </p>
<h3>Basic Properties</h3>
<p class="whs1">import geompy</p>
<p class="whs1">import math</p>
<p>&nbsp;</p>
<p># create a box</p>
<p class="whs1">box = geompy.MakeBoxDXDYDZ(100,30,100)</p>
<p class="whs1">props = geompy.BasicProperties(box)</p>
<p class="whs1">print &quot;\nBox
100x30x100 Basic Properties:&quot;</p>
<p class="whs1">print &quot; Wires
length: &quot;, props[0]</p>
<p class="whs1">print &quot; Surface
area: &quot;, props[1]</p>
<p class="whs1">print &quot; Volume
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:
&quot;, props[2]</p>
<p class="whs1">length = math.sqrt((props[0]
- 1840)*(props[0] - 1840))</p>
<p class="whs1">area = math.sqrt((props[1]
- 32000)*(props[1] - 32000))</p>
<p class="whs1">volume = math.sqrt((props[2]
- 300000)*(props[2] - 300000))</p>
<p class="whs1">if length &gt; 1e-7
or area &gt; 1e-7 or volume &gt; 1e-7:</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;print
&quot;While must be:&quot;</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;print
&quot; Wires length: &quot;, 1840</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;print
&quot; Surface area: &quot;, 32000</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;print
&quot; Volume &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:
&quot;, 300000.</p>
<h3>Center of masses</h3>
<p class="whs1">import geompy</p>
<p class="whs1">import math</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create a box</p>
<p class="whs1">box = geompy.MakeBoxDXDYDZ(100,30,100)</p>
<p class="whs1">cm = geompy.MakeCDG(box)</p>
<p class="whs1">if cm is None:</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;raise
RuntimeError, &quot;MakeCDG(box) failed&quot;</p>
<p class="whs1">else:</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;print
&quot;\nCentre of gravity of box has been successfully obtained:&quot;</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;coords
= geompy.PointCoordinates(cm)</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;print
&quot;(&quot;, coords[0], &quot;, &quot;, coords[1], &quot;, &quot;, coords[2],
&quot;)&quot;</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;dx
= math.sqrt((coords[0] - 50)*(coords[0] - 50))</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;dy
= math.sqrt((coords[1] - 15)*(coords[1] - 15))</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;dz
= math.sqrt((coords[2] - 50)*(coords[2] - 50))</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;if
dx &gt; 1e-7 or dy &gt; 1e-7 or dz &gt; 1e-7:</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print
&quot;But must be (50, 15, 50)&quot; </p>
<h3>Inertia</h3>
<p class="whs1">import geompy</p>
<p class="whs1">import math</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create a box</p>
<p class="whs1">box = geompy.MakeBoxDXDYDZ(100,30,100)</p>
<p class="whs1">In = geompy.Inertia(box)</p>
<p class="whs1">print &quot;\nInertia
matrix of box 100x30x100:&quot;</p>
<p class="whs1">print &quot; (&quot;,
In[0], &quot;, &quot;, In[1], &quot;, &quot;, In[2], &quot;)&quot;</p>
<p class="whs1">print &quot; (&quot;,
In[3], &quot;, &quot;, In[4], &quot;, &quot;, In[5], &quot;)&quot;</p>
<p class="whs1">print &quot; (&quot;,
In[6], &quot;, &quot;, In[7], &quot;, &quot;, In[8], &quot;)&quot;</p>
<p class="whs1">print &quot;Main moments
of inertia of box 100x30x100:&quot;</p>
<p class="whs1">print &quot; Ix =
&quot;, In[9], &quot;, Iy = &quot;, In[10], &quot;, Iz = &quot;, In[11]
</p>
<p class="whs1">&nbsp;</p>
<h3>Bounding Box</h3>
<p class="whs1">import geompy</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create a box</p>
<p class="whs1">box = geompy.MakeBoxDXDYDZ(100,30,100)</p>
<p class="whs1">bb = geompy.BoundingBox(box)</p>
<p class="whs1">print &quot;\nBounding
Box of box 100x30x100:&quot;</p>
<p class="whs1">print &quot; Xmin
= &quot;, bb[0], &quot;, Xmax = &quot;, bb[1]</p>
<p class="whs1">print &quot; Ymin
= &quot;, bb[2], &quot;, Ymax = &quot;, bb[3]</p>
<p class="whs1">print &quot; Zmin
= &quot;, bb[4], &quot;, Zmax = &quot;, bb[5] </p>
<p class="whs1">&nbsp;</p>
<p class="whs1">&nbsp;</p>
<h3>Minimal Distance </h3>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">import
geompy</span></p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create boxes</p>
<p class="whs1">box1 = geompy.MakeBoxDXDYDZ(100,30,100)</p>
<p class="whs1">box2 = geompy.MakeBox(105,0,0,200,30,100)</p>
<p class="whs1">min_dist = geompy.MinDistance(box1,box2)</p>
<p class="whs1">print &quot;\nMinimal
distance between box1 and box2 = &quot;, min_dist </p>
<p class="whs1">&nbsp;</p>
<p class="whs1">Point Coordinates</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">&nbsp;</p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">import
geompy</span></p>
<p class="whs1"># create a point</p>
<p class="whs1">point = geompy.MakeVertex(15,
23, 80)</p>
<p class="whs1"># get point's coordinates
and check its values</p>
<p class="whs1">coords = geompy.PointCoordinates(point)</p>
<p class="whs1">if coords[0] != 15
or coords[1] != 23 or coords[2] != 80 :</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;print
&quot;Coordinates of point must be (15, 23, 80), but returned (&quot;,
coords[0], &quot;, &quot;, coords[1], &quot;, &quot;, coords[2], &quot;)&quot;</p>
<p class="whs1">else :</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;print
&quot;All values are OK.&quot; </p>
<p class="whs1">&nbsp;</p>
<h3>Tolerance</h3>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">import
geompy</span></p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create a box</p>
<p class="whs1">box = geompy.MakeBoxDXDYDZ(100,30,100)</p>
<p class="whs1">Toler = geompy.Tolerance(box)</p>
<p class="whs1">print &quot;\nBox
100x30x100 tolerance:&quot;</p>
<p class="whs1">print &quot; Face
min. tolerance: &quot;, Toler[0]</p>
<p class="whs1">print &quot; Face
max. tolerance: &quot;, Toler[1]</p>
<p class="whs1">print &quot; Edge
min. tolerance: &quot;, Toler[2]</p>
<p class="whs1">print &quot; Edge
max. tolerance: &quot;, Toler[3]</p>
<p class="whs1">print &quot; Vertex
min. tolerance: &quot;, Toler[4]</p>
<p class="whs1">print &quot; Vertex
max. tolerance: &quot;, Toler[5] </p>
<p class="whs1">&nbsp;</p>
<h3>What Is</h3>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">import
geompy</span></p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create a box</p>
<p class="whs1">box = geompy.MakeBoxDXDYDZ(100,30,100)</p>
<p class="whs1">Descr = geompy.WhatIs(box)</p>
<p class="whs1">print &quot;\nBox
100x30x100 description:&quot;</p>
<p class="whs1">print Descr </p>
<p class="whs1">&nbsp;</p>
<h3>Check Shape</h3>
<p class="whs1">import geompy</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create a box</p>
<p class="whs1">box = geompy.MakeBoxDXDYDZ(100,30,100)</p>
<p class="whs1">IsValid = geompy.CheckShape(box)</p>
<p class="whs1">if IsValid == 0:</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;raise
RuntimeError, &quot;Invalid box created&quot;</p>
<p class="whs1">else:</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;print
&quot;\nBox is valid&quot; </p>
<p class="whs1">&nbsp;</p>
<p class="whs1">&nbsp;</p>
<h3>Check Compound of Blocks</h3>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">import
geompy</span></p>
<p class="whs1">import salome</p>
<p class="whs1">gg = salome.ImportComponentGUI(&quot;GEOM&quot;)</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create boxes</p>
<p class="whs1">box1 = geompy.MakeBox(0,0,0,100,50,100)</p>
<p class="whs1">box2 = geompy.MakeBox(100,0,0,250,50,100)</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># make compound</p>
<p class="whs1">compound = geompy.MakeCompound([box1,
box2])</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># glue compound's faces</p>
<p class="whs1">tolerance = 1e-5</p>
<p class="whs1">glue = geompy.MakeGlueFaces(compound,
tolerance)</p>
<p class="whs1">IsValid = geompy.CheckCompoundOfBlocks(glue)</p>
<p class="whs1">if IsValid == 0:</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;raise
RuntimeError, &quot;Invalid compound created&quot;</p>
<p class="whs1">else:</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;print
&quot;\nCompound is valid&quot; </p>
<p class="whs1">&nbsp;</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">&nbsp;</p>
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