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<h1>OCC 3D Viewer</h1>
<p><span style="font-weight: bold;"><B>OCC (Open CasCade) 3D viewer</B></span>
has been developed on the basis of Open CASCADE Technology. This is the
default viewer for Geometry Module, providing good representation of construction
and transformation of geometrical objects. Only this viewer allows to
work with groups and sub-shapes. This viewer can also work in Mesh module,
however, it doesn't allow to visualize meshes. </p>
<p> </p>
<p>The functions of OCC viewer are available via its Viewer Toolbar. Buttons
marked with small downward triangles have extended functionality which
can be accessed by locking on them with left mouse button. </p>
<p> </p>
<p><img src="pics/image95.gif" x-maintain-ratio="TRUE" width="291px" height="29px" border="0" class="img_whs1"></p>
<p> </p>
<ul type="disc" class="whs2">
<li class=kadov-p><p><img src="pics/image77.gif" x-maintain-ratio="TRUE" width="26px" height="25px" border="0" class="img_whs3"> <span style="font-weight: bold;"><B>Dump
View</B></span> - exports an object from the viewer in bmp, png, jpg or jpeg
image format. </p></li>
<li class=kadov-p><p><img src="pics/image88.gif" x-maintain-ratio="TRUE" width="27px" height="25px" border="0" class="img_whs4"> <span style="font-weight: bold;"><B>Show/Hide
Trihedron</B></span> - shows or hides coordinate axes. </p></li>
<li class=kadov-p><p><img src="pics/image96.gif" x-maintain-ratio="TRUE" width="24px" height="23px" border="0" class="img_whs5"> <span
style="font-weight: bold;"><B>Fit all - </B></span>allows
to select a point to be the center of a scene representing all displayed
objects in the visible area.<span style="font-weight: bold;"> <B></B></span></p></li>
<li class=kadov-p><p> <img src="pics/image97.gif" x-maintain-ratio="TRUE" width="24px" height="24px" border="0" class="img_whs6"> <span style="font-weight: bold;"><B>Fit area</B></span> - resizes
the view to place in the visible area only the contents of a frame drawn
with pressed left mouse button.</p></li>
<li class=kadov-p><p><img src="pics/image98.gif" x-maintain-ratio="TRUE" width="25px" height="24px" border="0" class="img_whs7"> <span style="font-weight: bold;"><B>Zoom</B></span>
- allows
to zoom in and out. </p></li>
<li class=kadov-p><p><img src="pics/image99.gif" x-maintain-ratio="TRUE" width="23px" height="23px" border="0" class="img_whs8"> <span style="font-weight: bold;"><B>Panning</B></span>
- if the represented objects are greater that the visible area and you
don't wish to use <span style="font-weight: bold;"><B>Fit all</B></span> functionality,
click on this button and you'll be able to drag the scene to see its remote
parts. </p></li>
<li class=kadov-p><p><img src="pics/image100.gif" x-maintain-ratio="TRUE" width="24px" height="24px" border="0" class="img_whs6"> <span style="font-weight: bold;"><B>Global
panning</B></span> - represents all displayed objects in the visible area.
</p></li>
<li class=kadov-p><p><img src="pics/image89.gif" x-maintain-ratio="TRUE" width="26px" height="26px" border="0" class="img_whs9"> <span style="font-weight: bold;"><B>Rotation</B></span>
- allows to rotate the selected object using the mouse. </p></li>
<li class=kadov-p><p><img src="pics/image102.gif" x-maintain-ratio="TRUE" width="78px" height="147px" border="0" class="img_whs10"> These buttons orientate the scene
strictly about coordinate axes.</p></li>
<li class=kadov-p><p><img src="pics/image91.gif" x-maintain-ratio="TRUE" height="26px" width="29px" border="0" class="img_whs11"> <span style="font-weight: bold;"><B>Reset</B></span>
- restores the default position (isometric) of objects in the scene.</p></li>
<li class=kadov-p><p><img src="pics/image103.gif" x-maintain-ratio="TRUE" width="26px" height="24px" border="0" class="img_whs12"> <span style="font-weight: bold;"><B>Memorise
view</B></span> - saves the current position of objects in the scene</p></li>
<li class=kadov-p><p><img src="pics/image105.gif" x-maintain-ratio="TRUE" width="26px" height="25px" border="0" class="img_whs3"> <span style="font-weight: bold;"><B>Restore
view - </B></span>restores the<span style="font-weight: bold;"> <B></B></span>saved
position of objects in the scene</p></li>
<li class=kadov-p><p><img src="pics/image86.gif" x-maintain-ratio="TRUE" width="28px" height="29px" border="0" class="img_whs13"> <span style="font-weight: bold;"><B>Clone
view</B></span> - opens a new duplicate scene.</p></li>
<li class=kadov-p><p><img src="pics/image106.gif" x-maintain-ratio="TRUE" width="29px" height="26px" border="0" class="img_whs14"> <span style="font-weight: bold;"><B>Clipping
-</B></span> allows to create cross-section views (clipping planes) of geometrical
objects.</p></li>
</ul>
<p> </p>
<p class="whs15"><img src="pics/clipping.png" x-maintain-ratio="TRUE" width="395px" height="280px" border="0" class="img_whs16"></p>
<p class="whs15"> </p>
<ul type="disc" class="whs2">
<li class=kadov-p><p class="whs15"><span style="font-weight: bold;"><B>Base
point</B></span> - allows to define the coordinates of the base point for
the clipping plane. Click </p></li>
<li class=kadov-p><p class="whs17"><span style="font-weight: bold;"><B>Reset</B></span>
- returns the base point to coordinate origin. </p></li>
<li class=kadov-p><p class="whs15"><span style="font-weight: bold;"><B>Direction</B></span>
- allows to define the orientation of the clipping plane.</p></li>
<li class=kadov-p><p class="whs17"><span style="font-weight: bold;"><B>Invert</B></span>
- allows to select which part of the object will be removed and which
will remain after clipping. </p></li>
<li class=kadov-p><p class="whs15"><span style="font-weight: bold;"><B>Preview</B></span>
- allows to see the results of clipping in the viewer.</p></li>
</ul>
<p> </p>
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