Add Cross Sections for Views

To add a cross section for a view, set a clipping plane for the custom view (the custom view must be created previously).

For example, to create a view with an XZ clipping plane:

Create a custom view. See Create Views for additional information about creation of views.

Create the clipping plane:


          OdPrcPlanePtr pPlane = OdPrcPlane::createObject();
          OdGeVector3d normal(0.0, 1.0, 0.0);
          OdGePoint3d origin(0.0, 0.0, 0.0);
          normal.normalize();
          OdGePlane gePlane(origin, normal);
          OdGeInterval intU(-3., 3);
          OdGeInterval intV(-3., 3);
          setPlaneEnvelope(&gePlane, intU, intV);
          pPlane->setFromOdGeSurface(gePlane);

The normal vector of the clipping plane determines the section direction for the object's part that will be removed.

Add created clipping plane to the view:


          OdPrcSurfacePtrArray &viewClippingPlanes = ((OdPrcSceneDisplayParameters*)pSceneDisplayParameters)->clippingPlanes();
           viewClippingPlanes.push_back(pPlane);

The result of adding a clipping plane to the view is illustrated below.

View with a cross section

Note that the .prc file format specification does not prohibit creating several clipping planes per view, but viewer applications (for example, Adobe® Reader) do not support this feature and can apply only one clipping plane.

Sample applications

Working with clipping planes is illustrated in ODA PRC SDK sample applications:

OdPrcCreate application. Sample code is contained in the simpleCrossSectioExample() function defined in the CrossSectionExample.cpp module.
OdaPrcApp MFC application. Another example is represented in the _CROSSSECTION_func (OdEdCommandContext* pCmdCtx) function defined in the PrcCrossSectionCommands.cpp module.
To get access to this function in the OdaPrcApp sample application, select Edit -> Registered Commands -> Cross Section -> CROSSSECTION.

View with a cross section

Sample applications

See Also