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Change Default Settings

There are two areas where the program's default settings can be changed, both available through the Edit menu; Settings and View Settings.

Note: ParaViewGeo works well with the default settings. Except maybe for those relating to the default view, the camera movement controls, the Level of Detail parameters and the background color, there should be little need to change the settings. Both windows have Reset buttons that will return all the settings to the program defaults.

Contents

Settings

Selecting Settings will open the Options dialog box which controls the options for the ParaViewGeo application as a whole. The tree structure on the left allows access to view/change the settings available.



General

The Default View used in the View Manager's render windows can be selected from the drop-down, and will be used when the application is first started and when the View Manager is turned on. If additional render windows are added to the View Manager, the view will not default to the Default View, but instead a list of the possible view types appears.

The Heart-Beat Interval is measured in minutes and refers to a periodic transmission with the server to maintain the connection.

The other option available here is Auto Accept, which will automatically apply datasets in the pipeline (using the default parameters) without the need to click the Apply button in the Object Inspector.


Render View - General

The options that are available when you click on Render View are the same as those that appear when you click on General underneath Render View.

Use Immediate Mode Rendering toggles between using immediate mode rendering or using display lists. Display lists can increase the rendering speed for small datasets, whereas immediate mode rendering will cause the application to redraw all objects in the display, avoiding duplication of data. Whenever possible, immediate mode rendering should be used.

The next option is to Use Triangle Strips. When selected, the triangles in the data are combined into triangle strips, which can improve rendering speed and is more efficient for memory usage. A drawback is that using triangle strips may change how normals are generated, which can affect the shading of the data and the coloring by cell-centered attributes. By default, triangle strips are not used.

The LOD Parameters refer to the Level of Detail used for the dataset objects. The LOD Threshold checkbox, when selected, allows you to decide how much memory the level of detail should use. If the geometry size is above the threshold level, a degraded form is used during rendering. The LOD Resolution slider determines how degraded the LOD objects should be. Outline Threshold is used to set the level where the unstructured grids should be shown as outlines only, while the Allow Rendering Interrupts checkbox is used for advanced client-server relations, and will interrupt a still render to perform an interactive render request. Temporarily lowering the LOD settings can speed up object rotation in the render view for complex datasets, and once you've reached the desired view, the detail level can be increased again.


Render View - Camera

The Camera section contains all the camera movement controls for the 2D and 3D environments. The drop-downs can be used to change how the mouse buttons affect the camera rotation, and the Reset Defaults button will revert all the settings to the program defaults.


Render View - Server

The Server settings are advanced options used when setting up a cluster or CAVE system, and are not covered in this manual. If you would like to set up a cluster or CAVE system and need more information, please Contact us.


View Settings

Selecting View Settings will display the options available for changing the properties of the selected view; the available settings will change depending on the view type of the active window. For 3D and 2D views, View Settings will display the Render View Options window. If the active view type is Stereo Net View or Spreadsheet, a message displays informing you that no dialog boxes exist. For all chart views, selecting View Settings opens the Chart Options window.


Render View Options

The Render View Options window contains different options depending on the view type (2D or 3D) of the active render window. The options for the 3D view are covered below; the 2D view only shows the Background Color option under General, as described below.

For a 3D View type, the tree structure contains three options; General, Lights and Annotation.


General

Choose the background color you want to use for the current and any new views by clicking on the Choose Color button and selecting a color or customizing your own on the Select Color window. The Restore default button will change the background back to the program default color.

The Use Parallel Projection checkbox determines how depth perception is handled. Parallel projection (also known as isometric projection) removes the depth perception, so all objects use the same scale, regardless of how close or far they are from the camera. There is no size distortion based on the distance when this box is checked. Perspective projection is used when the checkbox remains unchecked. With perspective projection, the objects closer to the camera appear larger than those farther away, to create a sense of distance.

Lights

An additional light can be turned on using the Headlight checkbox. The intensity of the light is controlled with the slider or the text entry field, using values between 0 and 1. The color of the light is controlled via the SetLightColor button. By default, this headlight is turned off.

The Light Kit provides access to more lights and lighting controls. Four additional lights are added; the key light, fill light, back lights and head light. All the lights move with the camera, so when the camera viewpoint is changed, the lighting of the objects changes as well.

The Key light is the main light and is usually positioned overhead and slightly off to one side. It provides a good general illumination. The Fill light is supposed to simulate diffuse reflections from other objects and is therefore positioned opposite the key light, but still on the same side of the objects. There are two Back lights, one on the left and one on the right of the screen to illuminate high contrast areas behind the objects. The Head light is always at the same position as the camera, and reduces the contrast between the key and fill lights.

Except for the head light, there are four parameters that can be set; warmth, intensity, elevation and azimuth. The headlight only has the first two, since it is always located together with the camera and therefore uses the camera's elevation and azimuth.

The Warmth determines the color of the light, with 0 being the 'cold' colors (blues) and 1 being the 'warm' colors (reds). A value of 0.5 is neutral white.

The Intensity controls the brightness of the light. For the key light, the range of values is between 0 and 2. For the others, the intensity is a ratio between that light and the key light (K:F, K:B, K:H), with values ranging from 1 to 15. The value sets how many times brighter the key light is compared to the other light.

The Elevation is expressed in degrees and sets the vertical position of the light, relative to the camera. Similarly, the Azimuth determines the horizontal position of the light relative to the camera, also expressed in degrees. For the back lights, the azimuth value entered is for the left light, and its negative is used for the right.

Maintain Luminance tries to maintain the light intensity by scaling each light's intensity based on the brightness of the color chosen in the Warmth section.

The Reset Light button will return all the light settings back to the application default settings.

Annotation

The Orientation Axes checkbox toggles the presence of the axis indicator usually located in the bottom left corner of the view window. By checking the Interactive checkbox, this axis can be moved around in the view window by clicking and dragging. The Outline Color button determines the color of the box surrounding the axis, which is visible only when the mouse is hovering above, and the color of the X, Y and Z labels can be set using the Axis Label Color button. The default for both colors is white.

The Show Axes checkbox under Center Of Rotation toggles the visibility of an axis representing the point in the 3D space around which the camera is currently rotating. This can also be toggled using the Show Center icon on the Center Axes Controls toolbar.


Chart Options

The Chart Options dialog box displays if a chart is visible in the render view. The tree structure contains options for General, Left Axis, Bottom Axis, Right Axis and Top Axis. The settings available for the Left, Bottom, Right and Top axes are all identical, so are covered just once.


General

A Chart Title can be added by filling in the Text field with the title and then choosing the Font, Alignment and the Color of the text. A checkbox toggles the visibility of the Chart Legend when it is available, and the Location and Flow can be set using the drop-downs available.

Axis

The main axis section contains checkboxes for Show Axis and Show Axis Grid to toggle which axes are visible and which grids are added. The Axis Color and Grid Color can be selected, and the Grid Color drop-down determines if the grid color is Lighter or Specified. Also on this page are the controls to toggle the visibility of the Axis Labels when there is room, including the Font, Label Color, Notation and Precision (between 0 and 6) of the label.

Axis - Layout

The Layout section has four options available. A checkbox toggles the use of a Logarithmic Scale when possible, and three radio buttons are used to either let the Chart Determine the layout, to Specify the Axis Range or to Specify each of the Axis Labels. The last two open up extra sections underneath so that the range and labels can be entered.

Axis - Title

The Title section controls the heading for the Axis Title. The Text for the title can be entered here, and the Font, Alignment and title Color can be chosen.



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