SoSpotLightManip

InventorModule

genre	InventorManipulators
author	Silicon Graphics Inc
package	MeVisLab/Standard
definition	inventor.def

Purpose

SoSpotLightManip is the base class for all SoSpotLight nodes that feature a built-in 3D user interface (this is the only such class provided with the Open Inventor toolkit).

Since it is derived from SoSpotLight, any changes to its fields result in a change in lighting for nodes that follow it in the scene graph. In this case, the interface modifies the Location, Direction, and Cut Off Angle fields. Additionally, the Color of the manipulator’s geometry will reflect the light’s color (but you cannot edit the color using this manipulator).

Windows

Default Panel

Output Fields

self

name: self, type: SoNode

Parameter Fields

Field Index

Color: Color

Cut Off Angle: Float

Direction: Vector3

Drop Off Rate: Float

Intensity: Float

Location: Vector3

On: Bool

Visible Fields

On

name: on, type: Bool, default: TRUE

Sets whether the light source is active.

Otherwise, the light source does not illuminate at all.

Intensity

name: intensity, type: Float, default: 1

Sets the illumination intensity of the light source.

Valid values range from 0.0 (no illumination) to 1.0 (maximum illumination).

Color

name: color, type: Color, default: 1 1 1

Sets the illumination color of the light source, defined by its RGB components.

Location

name: location, type: Vector3, default: 0 0 1

Sets the location of the light source.

Direction

name: direction, type: Vector3, default: 0 0 -1

Sets the principal direction of illumination (center axis of cone).

Drop Off Rate

name: dropOffRate, type: Float, default: 0

Sets the rate of intensity drop-off per change in angle from primary direction: 0 = constant intensity, 1 = very sharp drop-off.

Cut Off Angle

name: cutOffAngle, type: Float, default: 0.78539819

Sets the angle, in radians, beyond which the intensity is zero, measured from the center axis of the cone to an edge.