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Position of the light source relative to lit (extruded) geometries.

The position is constructed out of a radial coordinate, an azimuthal angle and a polar angle. where the radial coordinate indicates the distance from the center of the base of an object to its light, the azimuthal angle indicates the position of the light relative to 0 degree (0 degree when is set to viewport corresponds to the top of the viewport, or 0 degree when is set to map corresponds to due north, and degrees proceed clockwise), and polar indicates the height of the light (from 0 degree, directly above, to 180 degree, directly below).

data class LightPosition(radialCoordinate: Double, azimuthalAngle: Double, polarAngle: Double)