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Shape Explorer Sample

Shape Explorer Sample demonstrates investigation of structure of BSpline BRep shapes

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The application

By default the application displays two BSpline BRep objects. The controls on the form allow browsing different objects and the tree of subshapes inside each object

The text on the top of Shape Info group shows number of each kind of subshape in the current object. The Current Face control allws browsing all faces in the object. The face is highlighted with a different color in 3D view. The controls inside the Current Face info allow browsing subshapes of the current face. The current element is also displayed in 3D view.

The "More Properties" dialog. Shows additional properties of the current face, like range of it su,v parameters. It also demonstrates mapping of u,v rectangle to 3D points

The Construction menu demonstrates building a new BSpline BRep object from the ground up by defining geometry of its vertices, edges and faces.

Implementation

Information about subshapes of the current object are obtained via IKO_TopExp_Explorer queried from ISection of the current object. The same interface is used to obtain the m_iExplorerFace which is another IKO_TopExp_Explorer implemented by the current face.

m_iExplorerFace is used to obtain information about sub shapes of the current face.

ISelection_KC interface queried from IView is used to highlight current sub shapes in 3D view.

The Face Properties dialog uses IKO_BRepGProp_Face interface queried from the relevant IKO_TopExp_Explorer to access the information.

The Build New Shape item from Construction menu is inmplemented in ShapeBuilder class, which uses IKO_BRep_Builder interface to define geometry of the new object