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  • dot2 3D
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    • dot2 3D FAQ
  • dot2 Release Notes
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Version 1.9

Beam of Light (cone)

  Cone for conventional spots or washes:
  Similar to the rotation axes the position of the beam (cone) is marked with a square. The center of the square marks the origin of the cone (e.g. _XB). The normals mark the direction. The position inside the fixture body can be determined with an auxiliary cone that is placed temporarily into the body. The radius (r) of the cone can be calculated with the following formula: r = tan([max. open radius / 2]) * [height of the cone]Normally the cone uses the complete lens hole of the fixture. The square is placed at the top of the cone:



Placement of the cone 2D   Placement of the cone in 3D




Cone frustum for LED spots or washes:
  At LED spots with flat housings the light beam is a cone frustum. This needs 2 parameters (squares) for the beam, LD and LC:- LD marks the diameter of the beam output.- LC marks the clipping plane of the beam where the beam is cut. The direction of the beam is marked via the normals.
.   Placement of the cone frustum in 2D
  The upper square shows the _XLD square and the lower square shows the _XLC square where the beam is cut.

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