Provides options for you to key in precise positions for the light. By default, the fields on this tab are populated with coordinates that the user selected during light placement.
Location
North
Specifies the north coordinate of the new light.
East
Specifies the east coordinate of the new light.
Elevation
Specifies the elevation coordinate for the new light.
Pick Point
Allows selection of the 3D North/East/Elevation point from within the model. For more information, see Placing 3D Points.
Interest
In source lighting, interest is the second point in a two-point placement that determines where the light is cast and/or its falloff rate. For distant and spot lights, the interest point represents a point on a line from the light location in the direction that the light is cast. For point and spot lights, the interest point is also the falloff point (where the attenuated intensity of the light is one-half of its original intensity).
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Absolute - Switches the interest coordinate fields to accept the absolute directional values for the new light. This option allows you to define the direction of the light by specifying distances from the origin of the model.
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Delta value - Switches the interest coordinate fields to accept delta offset values for the light direction. This option allows you to define the direction of the light by specifying distances from the location of the light.
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Delta direction - Switches the interest coordinate fields to accept delta directional offset values for the light. Selecting this option changes the offset fields to Distance, Bearing Angle, and Elevation Angle. This option allows you to define the direction of the light by specifying a distance and two angles from the location of the light.
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North - Specifies the absolute or delta value for the north coordinate of the direction of the new light.
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East - Specifies the absolute or delta value for the east coordinate of the direction of the new light.
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Elevation - Specifies the absolute or delta value for the elevation coordinate of the direction of the new light.
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Distance - Specifies the delta direction distance for the direction of the new light.
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Bearing Angle - Specifies the delta direction bearing angle for the direction of the new light.
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Elevation Angle - Specifies the delta direction elevation angle for the direction of the new light.
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Pick Point - Specifies the 3D point. For more information, see Placing 3D Points.
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When placing point fall-off using a data point, the mouse move provides only two coordinates. The missing coordinate for the view selected is defaulted to the center point of the Main view.
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Points picked in the model are used by the software to get the vector; the points themselves are not stored.