Raytrace Options

d.Width represents the horizontal width of the map in system units.

e.Height represents vertical height of the map in system units.

6.Set the number of pixels in the horizontal or vertical direction. When you set one value, the other is automatically computed from the aspect ratio as determined by the height and width values.

7.Choose the picture quality. This determines the number of rays that will be traced. You can choose Low, High, or Custom. TracePro will trace a potentially different number of rays for each pixel in the map/rendering. The number will be at least equal to Min rays/pixel, but no larger than Max rays/pixel. TracePro will automatically determine the optimal number of rays to trace for each pixel using these two values.

8.Click on the checkbox Auto importance sampling toward sources in order to improve the sampling since the number of useful rays traced in reverse to the sources will be higher. Without Auto importance sampling, it typically requires more initial rays to be traced than if it is checked. An example is provided in “Example Using Luminance/Radiance Maps” on page 9.69.

9.Once you have the settings the way you wish, click the Insert button to create the Radiance/Luminance map. TracePro will draw a wireframe representation of the settings on top of the geometry whenever the Radiance source is selected.

10.Once you are ready to do the analysis, select Raytrace|Trace Luminance/ Radiance. TracePro will begin the ray trace using the wavelengths defined for each surface source. A Progress dialog box will open and display the % complete, elapsed time, and estimated time remaining.

11.When the ray trace is complete, click the Display map button to display the map/rendering.

To modify an existing Luminance/Radiance setup, simply double-click on its name in the Radiance/Luminance tab in the System tree, or select Define|Luminance/ Radiance and select the Luminance/Radiance map in the tree. Then change any values as needed and click Modify.

Chapter 6 will cover what is displayed for a Luminance map and the options to modify the map format. See “Luminance/Radiance Maps” on page 6.14

Raytrace Options

The Raytrace Options dialog box is opened by selecting Raytrace|Raytrace Options, as is shown in Figure 5.20. Note this depiction is only for the Standard and Expert editions of TracePro. This dialog controls various aspects of the raytrace.