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1  \chapter{The module \pyvisi}  \chapter{The module \pyvisi}
2  \label{PYVISI CHAP}  \label{PYVISI CHAP}
3    
4  \declaremodule{extension}{pyvisi}  \section{Introduction}
 \modulesynopsis{Python visualization interface}  
5    
6  \pyvisi provides an easy to use interface to the \VTK visualization  \pyvisi provides an easy to use interface to the \VTK visualization
7  tool. \pyvisi provides the following modules:  tool.  
8    
9  \begin{itemize}  \section{Rendering}
10  \item \Scene: Shows a scene in which components are to be displayed.  same word on rendering, off-line, on-line, how to rotate, zoom, close the window, ...
11  \item \Image: Shows an image.  
12  \item \Text: Shows some 2D text.  \section{How to Make a Movie}
13  \item \DataCollector: Deals with data for visualization.  
14  \item \Camera: Controls the camera manipulation.  \section{\pyvisi Classes}
15  \item \Light: Controls the light manipulation.  \declaremodule{extension}{esys.pyvisi}
16  \item \Map: Shows a scalar field by color on the domain surface.  \modulesynopsis{A simple Python visualization interface for \VTK}
17  \item \MapOnPlane: Shows a scalar field by color on a given plane.  
18  \item \MapOnClip: Shows a scalar field by color on a given clip.  In this section we give a brief overview over the important classes and their methods. Please
19  \item \MapOnScalarClip: Shows a scalar field by color on a give scalar clip.  check the \ReferenceGuide on details.
20  \item \Arrows: Shows a vector field by arrows.  %=====================================================================================
21  \item \ArrowsOnPlane: Shows a vector field by arrows on a given plane.  \subsection{Scene Classes}
22  \item \ArrowsOnClip: Shows a vector field by arrows on a given clip.  \begin{classdesc}{Scene}{}
23  \item \IsoSurface: Shows a scalar field for a given value by  Displays a scene in which objects are to be rendered on.
 an isosurface.  
 \item \IsoSurfaceOnPlane: Shows a scalar field for a given value by  
 an isosurfaceon a given plane.  
 \item \IsoSurfaceOnClip: Shows a scalar field for a given vlaue by  
 an isosurface on a given clip.  
 \item \Contour: Shows a scalar field by contour surfaces.  
 \item \ContourOnPlane: Shows a scalar field by contour surfaces on  
 a given plane.  
 \item \ContourOnClip: Shows a scalar field by contour surfaces on  
 a given clip.  
 \item \TensorC: Shows a tensor field by ellipsoids.  
 \item \TensorOnPlane: Shows a tensor field by ellipsoids on  
 a given plane.  
 \item \TensorOnClip: Shows a tensor field by ellipsoids on a given clip.  
 \item \StreamLines: Shows the path of particles in a vector field.  
 \item \Carpet: Shows a scalar field as plane deformated along  
 the plane normal.  
 \item \Position: Defines the x,y and z coordinates rendered object.  
 \item \Transform: Defines the orientation of rendered object.  
 \item \Style: Defines the style of text.  
 \item \BlueToRed: Defines a map spectrum from blue to red.  
 \item \RedToBlue: Defines a map spectrum from red to blue.  
 \item \Plane: Defines the cutting/clipping of rendered objects.  
 \end{itemize}  
   
 \section{\Scene class}  
 \begin{classdesc}{Scene}{renderer, x_size = 500, y_size = 500}  
 A \Scene object creates a window onto which objects are to be displayed.  
 \end{classdesc}  
   
 The following are the methods available:  
 \begin{methoddesc}[Scene]{saveImage}{image_name}  
 Save the rendered object as an image off-screen.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Scene]{render}{}  
 Render the object on-screen.  
 \end{methoddesc}  
   
 The following is a sample code using the \Scene class:  
 \verbatiminput{../examples/driverscene.py}  
   
 \section{\Image class}  
 \begin{classdesc}{Image}{scene, format}  
 An \Image object shows an image.  
 \end{classdesc}  
   
 The following is the method available:  
 \begin{methoddesc}[Image]{setFileName}{file_name}  
 Set the file name.  
 \end{methoddesc}  
   
 The following is a sample code using the \Image class.  
 \fig{fig:image.1} shows the corresponding output.  
 \verbatiminput{../examples/driverimage.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/Image}  
 \end{center}  
 \caption{Image}  
 \label{fig:image.1}  
 \end{figure}  
   
 \section{\Text class}  
 \begin{classdesc}{Text}{scene}  
 A \Text object shows 2D text.  
 \end{classdesc}  
   
 The following are the methods available:  
 \begin{methoddesc}[Text]{setText}{text}  
 Set the text.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Text]{setPosition}{x_coor, y_coor}  
 Set the display position of the text.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Text]{setStyle}{style}  
 Set the style of the text.  
 \end{methoddesc}  
   
 The following is a sample code using the \Text class.  
 \fig{fig:text.1} shows the corresponding output.  
 \verbatiminput{../examples/drivertext.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/Text}  
 \end{center}  
 \caption{2D text}  
 \label{fig:text.1}  
 \end{figure}  
   
 \section{\DataCollector class}  
 \begin{classdesc}{DataCollector}{scene, outline = True, cube_axes = False}  
 A \DataCollector object deals with the data for visualization.  
 \end{classdesc}  
   
 The following are the methods available:  
 \begin{methoddesc}[DataCollector]{setFileName}{file_name}  
 Set the file name from which data is to be read.  
 \end{methoddesc}  
   
 The following is a sample code using the \DataCollector class.  
 \fig{fig:datacollector.1} shows the corresponding output.  
 \verbatiminput{../examples/driverdatacollector.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/DataCollector}  
 \end{center}  
 \caption{Datacollector generating an outline with cube axes.}  
 \label{fig:datacollector.1}  
 \end{figure}  
   
 \section{\Camera class}  
 \begin{classdesc}{Camera}{scene, data_collector}  
 A \Camera object controls the camera's settings.  
 \end{classdesc}  
   
 The following are some of the methods available:  
 \begin{methoddesc}[Camera]{setFocalPoint}{position}  
 Set the focal point of the camera.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Camera]{setPosition}{position}  
 Set the position of the camera.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Camera]{azimuth}{angle}  
 Rotate the camera to the left and right.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Camera]{elevation}{angle}  
 Rotate the camera to the top and bottom.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Camera]{roll}{angle}  
 Roll the camera to the left and right.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Camera]{backView}{}  
 View the back of the rendered object.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Camera]{topView}{}  
 View the top of the rendered object.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Camera]{bottomView}{}  
 View the bottom of the rendered object.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Camera]{leftView}{}  
 View the left side of the rendered object.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Camera]{rightView}{}  
 View the right side of the rendered object.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Camera]{isometricView}{}  
 View the isometric side of the rendered object.  
 \end{methoddesc}  
   
 The following is a sample code using the \Camera class.  
 \fig{fig:camera.1} shows the corresponding output.  
 \verbatiminput{../examples/drivercamera.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=30mm]{figures/Camera}  
 \end{center}  
 \caption{Camera manipulation}  
 \label{fig:camera.1}  
 \end{figure}  
   
 \section{\Light class}  
 \begin{classdesc}{Light}{scene, data_collector}  
 A \Light object controls the light's settings.  
 \end{classdesc}  
   
 The following are the methods available:  
 \begin{methoddesc}[Light]{setColor}{color}  
 Set the color of the light.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Light]{setFocalPoint}{position}  
 Set the focal point of the light.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Light]{setPosition}{position}  
 Set the position of the light.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Light]{setIntensity}{intesity}  
 Set the intensity (brightness) of the light.  
 \end{methoddesc}  
   
 The following is a sample code using the \Light class.  
 \fig{fig:light.1} shows the corresponding output.  
 \verbatiminput{../examples/driverlight.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/Light}  
 \end{center}  
 \caption{Light}  
 \label{fig:light.1}  
 \end{figure}  
   
 \section{\Map class}  
 \begin{classdesc}{Map}{scene, data_collector, lut = None}  
 A \Map object shows a scalar field by color on the domain surface.  
 \end{classdesc}  
   
 The following is a sample code using the \Map class.  
 \fig{fig:map.1} shows the corresponding output.  
 \verbatiminput{../examples/drivermap.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/Map}  
 \end{center}  
 \caption{Surface map}  
 \label{fig:map.1}  
 \end{figure}  
   
 \section{\MapOnPlane class}  
 \begin{classdesc}{MapOnPlane}{scene, data_collector, transform, lut = None}  
 A \MapOnPlane object show a scalar field by color on a given plane.  
 \end{classdesc}  
   
 The following is a sample code using the \MapOnPlane class.  
 \fig{fig:maponplane.1} shows the corresponding output.  
 \verbatiminput{../examples/drivermaponplane.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/MapOnPlane}  
 \end{center}  
 \caption{Surface map on a plane}  
 \label{fig:maponplane.1}  
 \end{figure}  
   
 \section{\MapOnClip class}  
 \begin{classdesc}{MapOnClip}{scene, data_collector, transform, lut = None}  
 A \MapOnClip object show a scalar field by color on a given clip.  
 \end{classdesc}  
   
 The following is a sample code using the \MapOnClip class.  
 \fig{fig:maponclip.1} shows the corresponding output.  
 \verbatiminput{../examples/drivermaponclip.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/MapOnClip}  
 \end{center}  
 \caption{Surface map on a clip}  
 \label{fig:maponclip.1}  
 \end{figure}  
   
 \section{\MapOnScalarClip class}  
 \begin{classdesc}{MapOnScalarClip}{scene, data_collector, lut = None}  
 A \MapOnScalarClip object show a scalar field by color on a given scalar clip.  
 \end{classdesc}  
   
 The following is a sample code using the \MapOnScalarClip class.  
 \fig{fig:maponscalarclip.1} shows the corresponding output.  
 \verbatiminput{../examples/drivermaponscalarclip.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/MapOnScalarClip}  
 \end{center}  
 \caption{Surface map on a scalar clip}  
 \label{fig:maponscalarclip.1}  
 \end{figure}  
   
 \section{\Arrows class}  
 \begin{classdesc}{Arrows}{scene, data_collector, lut = None}  
 A \Arrows object shows a vector field by arrows.  
 \end{classdesc}  
   
 The following are the methods available:  
 \begin{methoddesc}[Arrows]{setVectorMode}{vector_mode}  
 Set the arrows vector mode.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Arrows]{setScaleMode}{scale_mode}  
 Set the arrows scale mode.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Arrows]{setScaleFactor}{scale_factor}  
 Set the arrows scale factor.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Arrows]{setColorMode}{color_mode}  
 Set the arrows color mode.  
 \end{methoddesc}  
   
 The following is a sample code using the \Arrows class.  
 \fig{fig:arrows.1} shows the corresponding output.  
 \verbatiminput{../examples/driverarrows.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/Arrows}  
 \end{center}  
 \caption{Arrows}  
 \label{fig:arrows.1}  
 \end{figure}  
   
 \section{\ArrowsOnPlane class}  
 \begin{classdesc}{ArrowsOnPlane}{scene, data_collector, transform, lut = None}  
 A \ArrowsOnPlane object shows a vector field by arrows on a given plane.  
 \end{classdesc}  
   
 The following is a sample code using the \ArrowsOnPlane class.  
 \fig{fig:arrowsonplane.1} shows the corresponding output.  
 \verbatiminput{../examples/driverarrowsonplane.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/ArrowsOnPlane}  
 \end{center}  
 \caption{Arrows on a plane}  
 \label{fig:arrowsonplane.1}  
 \end{figure}  
   
 \section{\ArrowsOnClip class}  
 \begin{classdesc}{ArrowsOnClip}{scene, data_collector, transform, lut = None}  
 A \ArrowsOnClip object shows a vector field by arrows on a given clip.  
 \end{classdesc}  
   
 The following is a sample code using the \ArrowsOnClip class.  
 \fig{fig:arrowsonclip.1} shows the corresponding output.  
 \verbatiminput{../examples/driverarrowsonclip.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/ArrowsOnClip}  
 \end{center}  
 \caption{Arrows on a clip}  
 \label{fig:arrowsonclip.1}  
 \end{figure}  
   
   
 \section{\IsoSurface class}  
 \begin{classdesc}{IsoSurface}{scene, data_collector, lut = None}  
 An \IsoSurface object shows a scalar field for a given value by an isosurface.  
 \end{classdesc}  
   
 The following is the method available:  
   
 \begin{methoddesc}[IsoSurface]{setValue}{contour_number, value}  
 Set the contour number and value.  
 \end{methoddesc}  
   
 The following is a sample code using the \IsoSurface class.  
 \fig{fig:isosurface.1} shows the corresponding output.  
 \verbatiminput{../examples/driverisosurface.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/IsoSurface}  
 \end{center}  
 \caption{IsoSurface}  
 \label{fig:isosurface.1}  
 \end{figure}  
   
 \section{\IsoSurfaceOnPlane class}  
 \begin{classdesc}{IsoSurfaceOnPlane}{scene, data_collector, transform,  
 lut = None}  
 An \IsoSurfaceOnPlane object shows a scalar field for a given value  
 by an isosurface on a given plane.  
 \end{classdesc}  
   
 The following is a sample code using the \IsoSurfaceOnPlane class.  
 \fig{fig:isosurfaceonplane.1} shows the corresponding output.  
 \verbatiminput{../examples/driverisosurfaceonplane.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/IsoSurfaceOnPlane}  
 \end{center}  
 \caption{IsoSurface on a plane}  
 \label{fig:isosurfaceonplane.1}  
 \end{figure}  
   
 \section{\IsoSurfaceOnClip class}  
 \begin{classdesc}{IsoSurfaceOnClip}{scene, data_collector, transform,  
 lut = None}  
 An \IsoSurfaceOnClip object shows a scalar field for a given value  
 by an isosurface on a given clip.  
 \end{classdesc}  
   
 The following is a sample code using the \IsoSurfaceOnClip class.  
 \fig{fig:isosurfaceonclip.1} shows the corresponding output.  
 \verbatiminput{../examples/driverisosurfaceonclip.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/IsoSurfaceOnClip}  
 \end{center}  
 \caption{IsoSurface on a clip}  
 \label{fig:isosurfaceonclip.1}  
 \end{figure}  
   
 \section{\Contour class}  
 \begin{classdesc}{Contour}{scene, data_collector, lut = None}  
 A \Contour object shows a scalar field contour surfaces.  
 \end{classdesc}  
   
 The following is the method available:  
 \begin{methoddesc}[Contour]{generateValues}{number_contours, min_range,  
 max_range}  
 Generate the specified number of contours within the specified range.  
 \end{methoddesc}  
   
 The following is a sample code using the \Contour class.  
 \fig{fig:contour.1} shows the corresponding output.  
 \verbatiminput{../examples/drivercontour.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/Contour}  
 \end{center}  
 \caption{Contour}  
 \label{fig:contour.1}  
 \end{figure}  
   
 \section{\ContourOnPlane class}  
 \begin{classdesc}{ContourOnPlane}{scene, data_collector, transform, lut = None}  
 A \ContourOnPlane object shows a scalar field contour surfaces on a given plane.  
 \end{classdesc}  
   
 The following is a sample code using the \ContourOnPlane class.  
 \fig{fig:contouronplane.1} shows the corresponding output.  
 \verbatiminput{../examples/drivercontouronplane.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/ContourOnPlane}  
 \end{center}  
 \caption{Contour on a plane}  
 \label{fig:contouronplane.1}  
 \end{figure}  
   
 \section{\ContourOnClip class}  
 \begin{classdesc}{ContourOnClip}{scene, data_collector, transform, lut = None}  
 A \ContourOnClip object shows a scalar field contour surfaces on a given clip.  
 \end{classdesc}  
   
 The following is a sample code using the \ContourOnClip class.  
 \fig{fig:contouronclip.1} shows the corresponding output.  
 \verbatiminput{../examples/drivercontouronclip.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/ContourOnClip}  
 \end{center}  
 \caption{Contour on a clip}  
 \label{fig:contouronclip.1}  
 \end{figure}  
   
 \section{\TensorC class}  
 \begin{classdesc}{Tensor}{scene, data_collector, lut = None}  
 A \TensorC object shows a tensor field by ellipsoids.  
 \end{classdesc}  
   
 The following are the methods available:  
 \begin{methoddesc}[Tensor]{setThetaResolution}{resolution}  
 Set the number of points in the longitude direction.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Tensor]{setPhiResolution}{resolution}  
 Set the number of points in the latitude direction.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Tensor]{setScaleFactor}{scale_factor}  
 Set the tensor scale factor.  
 \end{methoddesc}  
   
 \begin{methoddesc}[Tensor]{setMaxScaleFactor}{max_scale_factor}  
 Set the maximum allowable scale factor.  
 \end{methoddesc}  
   
 The following is a sample code using the \TensorC class.  
 \fig{fig:tensor.1} shows the corresponding output.  
 \verbatiminput{../examples/drivertensor.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/Tensor}  
 \end{center}  
 \caption{Tensor}  
 \label{fig:tensor.1}  
 \end{figure}  
   
 \section{\TensorOnPlane class}  
 \begin{classdesc}{TensorOnPlane}{scene, data_collector, transform, lut = None}  
 A \TensorOnPlane object shows a tensor field by ellipsoids on a given plane.  
 \end{classdesc}  
   
 The following is a sample code using the \TensorOnPlane class.  
 \fig{fig:tensoronplane.1} shows the corresponding output.  
 \verbatiminput{../examples/drivertensoronplane.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/TensorOnPlane}  
 \end{center}  
 \caption{Tensor on a plane}  
 \label{fig:tensoronplane.1}  
 \end{figure}  
   
 \section{\TensorOnClip class}  
 \begin{classdesc}{TensorOnClip}{scene, data_collector, transform, lut = None}  
 A \TensorOnClip object shows a tensor field by ellipsoids on a given clip.  
 \end{classdesc}  
   
 The following is a sample code using the \TensorOnClip class.  
 \fig{fig:tensoronclip.1} shows the corresponding output.  
 \verbatiminput{../examples/drivertensoronclip.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/TensorOnClip}  
 \end{center}  
 \caption{Tensor on a clip}  
 \label{fig:tensoronclip.1}  
 \end{figure}  
   
 \section{\StreamLines class}  
 \begin{classdesc}{StreamLines}{scene, data_collector, lut = None}  
 A \StreamLines object show the path of particles (within a specified cloud  
 of points) in a vector field.  
 \end{classdesc}  
   
 The following are the methods available:  
 \begin{methoddesc}[StreamLines]{setCloudRadius}{radius}  
 Set the radius for the cloud of points.  
 \end{methoddesc}  
   
 \begin{methoddesc}[StreamLines]{setCenter}{position}  
 Set the center for the cloud of points.  
 \end{methoddesc}  
   
 \begin{methoddesc}[StreamLines]{setNumberOfPoints}{points}  
 Set the number of points to generate for the cloud of points.  
 \end{methoddesc}  
   
 \begin{methoddesc}[StreamLines]{setMaximumPropagationTime}{time}  
 Set the maximum length for the streamlines in unit of time.  
 \end{methoddesc}  
   
 \begin{methoddesc}[StreamLines]{setStreamLinesSize}{stream_lines_size}  
 Set the size of the steamlines.  
 \end{methoddesc}  
   
 \begin{methoddesc}[StreamLines]{setAccuracy}{accuracy}  
 Set the accuracy for the streamlines.  
 \end{methoddesc}  
   
 \begin{methoddesc}[StreamLines]{setIntegrationToBothDirections}{}  
 Set the integration to occur in both directions.  
 \end{methoddesc}  
   
 \begin{methoddesc}[StreamLines]{setTubeRadius}{radius}  
 Set the minimum radius of the tube.  
 \end{methoddesc}  
   
 \begin{methoddesc}[StreamLines]{setNumberOfSides}{sides}  
 Set the number of sides for the tube.  
 \end{methoddesc}  
   
 \begin{methoddesc}[StreamLines]{setVaryRadiusByVector}{}  
 Set the variation of the tube radius with vector data.  
 \end{methoddesc}  
   
 The following is a sample code using the \StreamLines class.  
 \fig{fig:streamlines.1} shows the corresponding output.  
 \verbatiminput{../examples/driverstreamlines.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=40mm]{figures/StreamLines}  
 \end{center}  
 \caption{StreamLines}  
 \label{fig:streamlines.1}  
 \end{figure}  
   
 \section{\Carpet class}  
 \begin{classdesc}{Carpet}{scene, data_collector, transform, lut = None,  
 deform = None}  
 A \Carpet object shows a scalar/vector field as a plane deformated along  
 the plane normal.  
24  \end{classdesc}  \end{classdesc}
25    
26  The following is the method available:  \begin{classdesc}{Camera}{}
27  \begin{methoddesc}[Carpet]{setScaleFactor}{scale_factor}   Controls the camera manipulation.
 Set the displancement scale factor.  
 \end{methoddesc}  
   
 The following is a sample code using the \Carpet class.  
 \fig{fig:carpet.1} shows the corresponding output.  
 \verbatiminput{../examples/drivercarpet.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=50mm]{figures/Carpet}  
 \end{center}  
 \caption{Carpet}  
 \label{fig:carpet.1}  
 \end{figure}  
   
   
 \section{\Position class}  
 \begin{classdesc}{Position}{x_coor, y_coor, z_coor}  
 A \Position object defines the x, y and z coordinates of rendered object.  
28  \end{classdesc}  \end{classdesc}
29    
30  \section{\Transform class}  \begin{classdesc}{Light}{}
31  \begin{classdesc}{Transform}{}   Controls the light manipulation.
 A \Transform object defines the orientation of rendered object.  
32  \end{classdesc}  \end{classdesc}
33    
34  The following are some of the methods available:  %============================================================================================================
35  \begin{methoddesc}[Transform]{translate}{x_offset, y_offset, z_offset}  \subsection{Input Classes}
 Translate the rendered object along the x, y and z-axes.  
 \end{methoddesc}  
36    
37  \begin{methoddesc}[Transform]{rotateX}{angle}  \begin{classdesc}{Image}{}
38  Rotate the rendered object along the x-axis.   Displays an image.
39  \end{methoddesc}  \end{classdesc}
40    
41    \begin{classdesc}{Text}{}
42     Shows some 2D text.
43    \end{classdesc}
44    
45  \begin{methoddesc}[Transform]{rotateY}{angle}  \begin{classdesc}{DataCollector}{}
46  Rotate the rendered object along the y-axis.  Deals with the source of data for visualization.
47  \end{methoddesc}  \end{classdesc}
48    
49  \begin{methoddesc}[Transform]{rotateZ}{angle}  %============================================================================================================
50  Rotate the rendered object along the z-axis.  \subsection{Data Visualization}
51  \end{methoddesc}  \begin{classdesc}{Map}{}
52     Displays a scalar field using a domain surface.
53    \end{classdesc}
54    
55  \begin{methoddesc}[Transform]{xyPlane}{offset = 0}  \begin{classdesc}{MapOnPlaneCut}{}
56  Set the plane orthogonal to the z-axis.   Displays a scalar field using a domain surface cut on a plane.
57  \end{methoddesc}  \end{classdesc}
58    
59  \begin{methoddesc}[Transform]{yzPlane}{offset = 0}  \begin{classdesc}{MapOnPlaneClip}{}
60  Set the plane orthogonal to the x-axis.   Displays a scalar field using a domain surface clipped
61  \end{methoddesc}          on a plane.
62    \end{classdesc}
63    
64  \begin{methoddesc}[Transform]{xzPlane}{offset = 0}  \begin{classdesc}{MapOnScalarClip}{}
65  Set the plane orthogonal to the y-axis.   Displays a scalar field using a domain surface clipped
66  \end{methoddesc}          using a scalar value.
67    \end{classdesc}
68    
69  \section{\Style class}  \begin{classdesc}{Velocity}{}
70  \begin{classdesc}{Style}{}   Displays a vector field using arrows.
 A \Style object defines the style of text.  
71  \end{classdesc}  \end{classdesc}
72    
73  The following are the methods available:  \begin{classdesc}{VelocityOnPlaneCut}{}
74  \begin{methoddesc}[Style]{setFontFamily}{family}   Displays a vector field using arrows cut on a plane.
75  Set the font family (i.e. Times)  \end{classdesc}
 \end{methoddesc}  
76    
77  \begin{methoddesc}[Style]{boldOn}{}  \begin{classdesc}{VelocityOnPlaneClip}{}
78  Bold the text.   Displays a vector field using arrows clipped on a
79  \end{methoddesc}          plane.
80    \end{classdesc}
81    
82  \begin{methoddesc}[Style]{italicOn}{}  \begin{classdesc}{Ellipsoid}{}
83  Italize the text.   Displays a tensor field using spheres.
84  \end{methoddesc}  \end{classdesc}
85    
86  \begin{methoddesc}[Style]{shadowOn}{}  \begin{classdesc}{EllipsoidOnPlaneCut}{}
87  Apply shadows on the text.   Displays a tensor field using spheres cut on a
88  \end{methoddesc}          plane.
89    \end{classdesc}
90    
91  \begin{methoddesc}[Style]{setColor}{}  \begin{classdesc}{EllipsoidOnPlaneClip}{}
92  Set the text color.   Displays a tensor field using spheres clipped
93  \end{methoddesc}          on a plane.
94    \end{classdesc}
95    
96  \section{\BlueToRed class}          
97  \begin{classdesc}{BlueToRed}{}  \begin{classdesc}{Contour}{}
98  A \BlueToRed object defines a map spectrum from blue to red.   Shows a scalar field by contour surfaces.
99  \end{classdesc}  \end{classdesc}
100    
101  \section{\RedToBlue class}  \begin{classdesc}{ContourOnPlane}{}
102  \begin{classdesc}{RedToBlue}{}   Shows a scalar field by contour surfaces on
103  A \RedToBlue object defines a map spectrum from red to blue.  a given plane.
104    \end{classdesc}
105    
106    \begin{classdesc}{ContourOnClip}{}
107     Shows a scalar field by contour surfaces on
108    a given clip.
109    \end{classdesc}
110    
111    \begin{classdesc}{IsoSurface}{}
112     Shows a scalar field for a given value by
113    an isosurface.
114    \end{classdesc}
115    
116    \begin{classdesc}{IsoSurfaceOnPlane}{}
117     Shows a scalar field for a given value by
118    an isosurfaceon a given plane.
119    \end{classdesc}
120    
121    \begin{classdesc}{IsoSurfaceOnClip}{}
122     Shows a scalar field for a given vlaue by
123    an isosurface on a given clip.
124    \end{classdesc}
125    
126    \begin{classdesc}{StreamLines}{}
127     Shows the path of particles in a vector field.
128    \end{classdesc}
129    
130    \begin{classdesc}{Carpet}{}
131     Shows a scalar field as plane deformated along
132    the plane normal.
133    \end{classdesc}
134    
135    \section{Geometry}
136    \begin{classdesc}{Position}{}
137     Defines the x,y and z coordinates rendered object.
138    \end{classdesc}
139    
140    \begin{classdesc}{Transform}{}
141    Defines the orientation of rendered object.
142  \end{classdesc}  \end{classdesc}
143    
144  \section{\Plane class}  \begin{classdesc}{Plane}{}
145  The following are the methods available:  Defines the cutting/clipping of rendered objects.
146  \begin{methoddesc}[Plane]{setPlaneOrigin}{position}  \end{classdesc}
 Set the plane origin  
 \end{methoddesc}  
   
 \begin{methoddesc}[Plane]{setPlaneNormal}{position}  
 Set the plane normal  
 \end{methoddesc}  
   
 \begin{methoddesc}[Plane]{setValue}{clipping_value}  
 Set the clipping value  
 \end{methoddesc}  
   
 \begin{methoddesc}[Plane]{setInsideOutOn}{}  
 Set the clipping to inside out  
 \end{methoddesc}  
   
 \begin{methoddesc}[Plane]{setInsideOutOff}{}  
 Disable the inside out clipping  
 \end{methoddesc}  
   
 \section{Additional Notes}  
 The following is a sample code rendering multiple planes.  
 \fig{fig:multipleplanes.1} shows the corresponding output.  
 \verbatiminput{../examples/drivermultipleplanes.py}  
   
 \begin{figure}[ht]  
 \begin{center}  
 \includegraphics[width=60mm]{figures/MultiplePlanes}  
 \end{center}  
 \caption{Multiple planes}  
 \label{fig:multipleplanes.1}  
 \end{figure}  
147    
 The following is a sample code rendering multiple cuts.  
 \verbatiminput{../examples/drivermultiplecuts.py}  
148    
149    \subsection{Beautification}
150    \begin{classdesc}{Style}{}
151    Defines the style of text.
152    \end{classdesc}
153    
154    \begin{classdesc}{BlueToRed}{}
155     Defines a map spectrum from blue to red.
156    \end{classdesc}
157    
158    \begin{classdesc}{RedToBlue}{}
159     Defines a map spectrum from red to blue.
160    \end{classdesc}
161    
 The following is a sample code rendering multiple reads from multiple files.  
 \verbatiminput{../examples/drivermultiplereads.py}  
162    
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