Analysis

FIGURE 6.8 - Select Rays Dialog.

Luminance/Radiance Maps

After a Luminance map is traced as described in “Luminance/Radiance Ray Tracing” on page 5.30, the map is displayed from the Luminance Dialog. Display settings can be changed by right-clicking on the plot or by selecting

Analysis|Luminance/Radiance Map Options from the TracePro main menu, then selecting the name of the map in the dialog box. The Options dialog is shown in Figure 6.9.

FIGURE 6.9 - Luminance Map Options dialog.

Color scheme

Selecting the True Color color scheme results in a true color or photorealistic rendering based on the wavelengths traced in the model. The more wavelengths traced, the more accurate the rendering will be. If you trace just one wavelength, the rendering will appear illuminated in the color corresponding to that wavelength. No luminance/radiance units are displayed for a True Color map.

For any other Color Scheme selection, the colors in the map are as specified in the Color Scheme, with colors corresponding to luminance or radiance values.

6.14	TracePro 5.0 User’s Manual

Analysis Menu

Units

When you move the mouse over the map, the luminance/radiance value at the position of the mouse cursor is shown in the status bar.

•When Photometric Units are selected in the Raytrace Options dialog box, the Units selections available in the Luminance Map Options dialog box are cd/ m2(nit), footlambert, or millilambert.

•When Radiometric Units are selected, the only units available for the Radiance Map Options are W/m2.

An example plot is displayed in Figure 6.10. This example is further exapnded upon, especially the usefulness of Auto importance sampling, in “Example Using Luminance/Radiance Maps” on page 9.69

FIGURE 6.10 - Luminance plot in Greyscale.

3D Irradiance Plot

3D Irradiance plots map the incident flux on to the selected surfaces or objects. The gray level shows the relative flux over the surface. Each object and surface selected with be displayed. The view can be changed using the Pan, View and Zoom commands operating in a similar fashion to the Model Window.

The Options dialog provides the following parameter to alter the plot display.

TracePro 5.0 User’s Manual

6.15

Analysis

Rays to Plot

You can set the plot to show of either absorbed or incident rays.

Map Count

Set the number for “Flux buckets” for the horizontal and vertical axis.

Show wireframes

Displays the facets which define the selected geometry.

Vertex Smoothing

Apply color data to the facet vertices. The default applies the color (flux) value to the facet.

Color Map

Selects the color palette for the plot. Grayscale and color palettes are available.

Gradient Display

Turns on high-resolution color/grayscale shading.

Apply

Updates the plot.

6.16	TracePro 5.0 User’s Manual