Mulder, J.D. and J.J. van Wijk, 3D Computational Steering with Parametrized Geometric Objects. In: Nielson, G.M. and D. Silver (eds.), Proceedings IEEE Visualization '95, CS Press, pp. 304--311, October 1995.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....a computation written in FORTRAN to include directives for steering the algorithm. Mulder et al. discussed a customizable widget system where attributes of the widgets are linked to steerable algorithmic variables, and direct manipulations of the widgets result in state changes in the variables [11]. Brodlie et al. implemented steering along with a history tree that allowed the user to return to previous computation results [3] Many other systems for visual steering have been developed, such as CUMULVS (Oak Ridge) VIPER (TU Work done while at U of M, current contact: chi acm.org, Xerox ....

J. Mulder and J. van Wijk. 3D computational steering with parametrized geometric objects. In IEEE Visualization '95, pages 304--311. IEEE CS Press, 1995.

....collection of general purpose satellites have been developed. For example, a data slicing satellite, a calculator, a data logger, a VTK satellite that provides all VTK functionality [15] etc. Also, a 3D interactive editor and rendering satellite that binds data to geometry has been developed [13]. 2.2 Variables The basic blackboard object is the variable, which encapsulates all information required to access a blackboard object. Variables are defined as a tuple consisting of of four components: a name, a type descriptor, raw data and a list of attributes (see figure 2) Names uniquely ....

J.D. Mulder and J.J. van Wijk. 3D computational steering with parametrized geometric objects. In G.M. Nielson and D. Silver, editors, Proceedings Visualization '95, pages 304--311, 1995.

....large collection of general purpose satellites have been developed. For example, a data slicing satellite, a calculator, a data logger, a VTK satellite that provides all VTK functionality [9] etc. Also, a 3D interactive editor and rendering satellite that binds data to geometry has been developed [10]. The format of the paper is: In the next sections we present some design details of a distributed blackboard architecture. The distributed blackboard extends the centralized blackboard in many ways; it provides support for efficient data movement among heterogeneous hosts, scales for large data ....

J.D. Mulder and J.J. van Wijk. 3D computational steering with parametrized geometric objects. In G.M. Nielson and D. Silver, editors, Proceedings Visualization '95, pages 304--311, 1995.

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Mulder, J.D. and J.J. van Wijk, 3D Computational Steering with Parametrized Geometric Objects. In: Nielson, G.M. and D. Silver (eds.), Proceedings IEEE Visualization '95, CS Press, pp. 304--311, October 1995.

....is shown in fig. 4. 5. CONCLUSIONS 5 PGOeditor Data Manager simulation results gap db gap server gap visualization mouse, keyboard SGI Cray Figure 4: Data flow diagram For the development of the user interface we used the Computational Steering Environment (CSE) developed at CWI [4, 5]. The CSE provides a powerful graphics editor for the definition of user interfaces and visualizations. This editor is based on Parametrized Graphics Objects. The user can draw graphics objects, which properties (geometry, color) are parametrized to data. This parametrization is bidirectional: ....

J.D. Mulder, and J.J. van Wijk. 3D Computational steering with parametrized geometric objects. In: G.M. Nielson, and D. Silver (eds.), Proceedings IEEE Visualization'95, CS Press, pp. 304--311, October 1995.

....graphics, MacDraw like, editing tool for the creation and use of computational steering interfaces. With the PGO editor the user creates a visual specification of his interface, just by drawing it. As an example, figure 4 shows how the interface of figure 3 is defined. Both a 3D version [5] and 5. Parametrized Graphics Objects 6 X = x Y = y a b c d e g h x y x y y x x y x x x y x y x y x x y x Figure 4: Two scalar variables, edit mode a 2D version have been developed. For tutorial purposes we explain its use via the 2D version. The PGO editor has two modes: ....

....generated (equidistant, rectangular or curvilinear) depends on the dimensions of the variables to which the geometry and attributes are parametrized. 6. APPLICATIONS We have used the CSE for a number of applications. Here we present a representative sample, other examples can be found elsewhere [5, 6]. These applications vary strongly. The application domains range from pure mathematics to engineering; the amount of interaction varies from monitoring results to full control over many parameters simultaneously; the visual presentation varies from simple graphs to highly customized displays; the ....

Mulder, J.D. and J.J. van Wijk, 3D ComputationalSteering with Parametrized Geometric Objects. In: Nielson, G.M. and D. Silver (eds.), Proceedings IEEE Visualization'95, CS Press, pp. 304--311, October 1995.

....In run mode the PGO editor takes care of maintaining a one to one mapping of the data in the Data Manager to the DOFs: If a value changes, the associated positions and other graphic attributes are updated; If the user drags an object, the associated values are modified. Both a 2D and a 3D version [8] of this tool have been developed. P1: P1x, P1y] P2: P2x, P2y] P3: P3x, P3y] P4: P4x, P4y] r1 r2 r3 P5: P5x, P5y] r4 P2x P2y P3x P3y P1x P1y P5x P5y r1 r2 r3 r4 P4x P4y Figure 6: Chain, edit mode All examples shown are running applications, developed with the ....

Mulder, J. and J.J. van Wijk, 3D Computational Steering with Parametrized Geometric Objects. In: Nielson, G.M. and D. Silver (eds.), Proceedings IEEE Visualization'95, CS Press, pp. 304--311, October 1995.

....no integral minimization criterion can be defined. This requires a weighting of the difference between calculated and measured results for different experimental conditions. As a starting point for the development of the user interface we have used the Computational Steering Environment (CSE) 10] [11], developed at CWI. The CSE provides a powerful graphics editor for the definition of user interfaces and visualizations. This editor is based on Parameterized Graphics Objects (PGO) The user can draw graphics objects, which properties (geometry, color) are mapped to data. This parametrization is ....

J.D. Mulder and J.J. van Wijk, 3D Computational steering with parametrized geometric objects. In G.M Nielson and D. Silver (eds.), Proceedings IEEE Visualization `95, CS Press, pp. 304-311, October 1995.

....Many data manipulation satellites have been developed, such as a logging satellite, a calculator, and a data slicer. Satellite A Researcher PGO editor Satellite B Data Manager Satellite . Satellite C Simulation Fig. 1. Architecture of the Computational Steering Environment. The PGO editor [14] is a graphical editor that enables the user to create custom 2D, 3D desktop, and 3D immersive user interfaces for the visualization and manipulation of the data present in the Data Manager. PGO interfaces are constructed out of point based Parametrized Geometric Objects. The user can construct ....

J.D. Mulder and J.J. van Wijk. 3D computational steering with parametrized geometric objects. In G.M. Nielson and D. Silver, editors, Visualization '95 (Proceedings of the 1995 Visualization Conference), pages 304--311, 1995.

....of the communication protocols between the local data managers ensures that data is only transported when needed. User Interface The user interface to visualize and manipulate data is provided by additional satellite processes. The most important user interface satellite is the PGO editor [13]. This satellite is an interactive MacDraw like graphics editing tool that allows a researcher to create custom 2D, 3D and immersive 3D user interfaces to visualize and manipulate the data in the data manager. The user draws an initial layout of the interface with graphics objects. He then ....

J.D. Mulder and J.J. van Wijk. 3D computational steering with parametrized geometric objects. In G.M. Nielson and D. Silver, editors, Visualization '95 (Proceedings of the 1995 Visualization Conference), pages 304--311, 1995.

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