Displaying a Structure's Shadow in Floor Plan View
| Reference Number: KB-02083 Last Updated: 07-07-2014 12:46 PM
The information in this article applies to:
How can I show where the shadows fall in floor plan view?
Sun Angles allow the shadow cast by a building at any time of the year to be displayed in floor plan and rendered views.
A Sun Angle arrow is a marker that displays in floor plan view and indicates the angle of the sun at a specific time and location on the Earth. Multiple Sun Angles can be created in floor plan view, each with different specifications.
Sun Angles are parallel light sources. Their location and direction are defined per plan. To accurately define the Sun's location relative to the model, use a North Pointer .
To create a Sun Angle
Make the first floor or foundation
level the current floor. Sun Angles can only be created on these floor levels.
In floor plan view, select CAD> Lines> Sun Angle
and click in the drawing area where the Sun Angle arrow should display
In the Sun Angle Specification dialog, specify the Sun Angle's Earth Data and other information. Click OK.
After it is created, a Sun Angle can be moved to a different location in floor plan view. Shadows are not affected.
A Sun Angle's position is specified by Latitude and Longitude. The following table lists a sample of latitude and longitude values for some cities:
When rendering an exterior view, the program looks for any Sun Angles that are turned on. A Sun Angle can be turned on or off in the Sun Angle Specification dialog. If a Sun Angle does not exist, the program uses the Default Sun.
3D> Lighting> Toggle Sunlight controls the display of either the Default Sun or the current Sun Angle as a source of light.
Once a sun angle has been created, shadows can be created.
To display shadows created by a Sun Angle
Navigate to Edit>Preferences>Render
, check Show Shadows
for Preview and/or Final View and Click OK
Next, select a Sun Angle and click the Open Object
On the Lighting Data
tab of the Sun Angle Specification
dialog, make sure that Casts Shadows
To display the shadow in floor plan view, click the Make Shadow
button on the Earth Data
If no Terrain Perimeter has been created, shadows fall on an imaginary plane at height zero, the default height for the first floor.
If a Terrain Perimeter exists, shadows are modified to indicate where the real shadow would fall on the actual terrain.
Multiple Sun Angles can be placed in the same plan to allow the simultaneous display of shadows cast at different times in floor plan view.
Specify different line colors and/or fill styles for shadows cast by multiple Sun Angles in the Sun Angle Specification dialog.
There are several ways to delete the shadow created by a Sun Angle
In floor plan view, select and delete the defining polyline.
In floor plan view, select and delete the Sun Angle arrow.
In the Sun Angle Specification dialog, click the Delete Shadow button.
In the Sun Angle Specification dialog, click the Make Shadow button to delete the existing shadow and create a new one.