Skip to content

Module ViewLib

Jump to bottom Edit New page
Georg Muntingh edited this page Aug 24, 2017 · 3 revisions

The Viewlib module contains the application goview, which is a utility to support visualization of curves, surface, point clouds and line clouds.

The application goview visualizes curves and surfaces read from an IGES file or from the GoTools internal (g2) file format. Currently, goview is not able to visualize volumes; in this case it is recommended to instead visualize the boundary surfaces.

Qt is used for representing the Graphical User Interface (GUI) and OpenGL for graphics. Curves and surfaces are tessellated in the submodule tesselate in the module gotools-core. According to their type, curves and surfaces are approximated by triangles or line segments, which are convenient for visualization using OpenGL.

The model in the viewer is manipulated using the mouse keys. The left key rotates the model, the middle key is used for zooming, and the right key for translation of the model.

The goview GUI has a graphical window, a window containing an object list and a number of pull down menus:

  • file: This menu allows the user to read from and write to geometry files, and to close the current session and make the viewer ready to read a new geometry file.
  • view: This menu item presents the option to choose either shaded or wireframe mode for visualization. A highlight mode may be toggled and there is some functionality for focusing.
  • select: Entities can be selected using this menu, in the object list or by using the control key in combination with the left mouse key.
  • group: Objects can be grouped using this option, although this menu is rarely used.
  • object: This menu offers the possibility to alter the resolution of curves and surfaces and to enable/disable selected entities from the view. Some commands have a key pad short cut.

Note that goview is offered as a utility and not a product. In particular there is no help functionality implemented, and visualization of trimmed surfaces can have flaws, even though they are normally repaired or minimized by increasing the resolution.

Dependencies

Viewlib requires the following libraries to be installed on the system:

Resources

What is GoTools?

GoTools is the group name of many interdependent C++ software modules developed by the geometry group at SINTEF Digital, Department of Mathematics and Cybernetics. Starting around the year 2000, GoTools software has been developed for a range of different applications in many different projects. Most of the functionality is related to geometry, and in particular spline representations of geometry, see the highlights and overview of functionality. For more idetail, see GoTools manual.

License

GoTools is offered with the GNU Affero General Public License version 3. Alternatively, you can be released from the requirements of the license by purchasing a commercial license. Buying such a license is mandatory as soon as you develop commercial activities involving the GoTools library without disclosing the source code of your own applications.

Home

Getting started

Miscellaneous

Functionality

Dependencies

Clone this wiki locally