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3. Check the Occlusion Culling check box to have JetStream only draw visible objects, i.e. ignores
objects that are behind other objects. This option will improve the display performance when much of
the model is not visible. For example, when you're walking down the corridor of a building. Occlusion
culling can only be utilized on a machine with an OpenGL 1.5 compliant graphics card.
4. Check the Interactive Transparency check box to allow the rendering of transparent items during
interactive navigation. This may have an effect on performance - especially if your video card does
not support hardware accelerated OpenGL - and so by default transparent items are only drawn
when interaction has ceased.
5. Check the Guarantee Frame Rate check box to enable the JetStream engine to maintain the user
defined frame rate set in Tools, File Options, Speed (see Section 12.4, “ Speed Options ”). By
default the target rate is maintained while moving. When movement stops the complete model is
rendered. If guarantee frame rate is disabled the complete model is always rendered during
navigation, no matter how long it takes.
6. Check the Fill In Detail check box if you want JetStream to fill in any discarded detail when
navigation has ceased.
7. Check the Batch Fill check box if you want JetStream to fill in detail in chunks rather than gradually.
By default this is disabled as gradual rendering is generally better but some video cards may work
better with batch fill enabled.
8. In the Point Size text box, enter a number between 1 and 9 to set the size (in pixels) of points drawn
in the main window. See Section 12.1.3.3, “ Points ” for more information on points.
9. In the Line Size text box, enter a number between 1 and 9 to set the width (in pixels) of lines drawn
in the main window. See Section 12.1.3.2, “ Lines ” for more information on lines.
10. In the Snap Point Size text box, enter a number between 1 and 9 to set the size (in pixels) of snap
points drawn in the main window.
11. From the Heads Up drop-down, select XYZ to turn on the XYZ indicator, or Compass to turn on the
north-south indicator, or Off to display neither. Check the Show Position check box to show the
absolute X, Y, Z position of the camera (or the avatar's eye position if the avatar is visible). These
position coordinates are shown at the bottom left of the main view, and can be shown with or without
the other Heads Up elements.
Note
See Orientation Options for more information on correctly orientating your model file.
12. Click OK to set these options or Cancel to exit the dialog without setting them. See Section 12.1.3.4,
“ Snap Points ” for more information on snap points.
12.6. Performance Options
This dialog allows you to customize the performance of JetStream.
Setting Performance options
1. Go to Tools, Global Options, Performance
Display Modes
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