8.14.2.2 IfcLightDistributionCurveEnum

8.14.2.2.1 Semantic definition

There are three kinds of light distribution curves, see Figure 1.

Type	Description
`TYPE_A`	Type A is basically not used. For completeness the Type A Photometry equals the Type B rotated 90° around the Z-Axis counter clockwise.
`TYPE_B`	Type B is sometimes used for floodlights. The B-Plane System has a horizontal axis. B-Angles are valid from -180° to +180° with B 0° at the bottom and B180°/B-180° at the top, β-Angles are valid from -90° to +90°. Figure 8.14.2.2.A
`TYPE_C`	Type C is the recommended standard system. The C-Plane system equals a globe with a vertical axis. C-Angles are valid from 0° to 360°, γ-Angles are valid from 0° (south pole) to 180° (north pole). Figure 8.14.2.2.B
`NOTDEFINED`	Not defined.

TYPE IfcLightDistributionCurveEnum = ENUMERATION OF
	(TYPE_A
	,TYPE_B
	,TYPE_C
	,NOTDEFINED);
END_TYPE;