Abstract:The article reviews calculation of total light distribution of several light sources (LS), which are differently oriented in space with their locations conventionally 1 being the same. It is proposed that luminous intensity curves (photometric body) of LSs are described in IESNA format (or in the format of tables, which is basically the same). Two methods of solving the problem are proposed. The first one is related to preliminary trigonometric interpolation of luminous intensity curves for each LS performed by means of discrete Fourier transformation (DFT). The second one is based on piecewise-linear interpolation of this curves using Delaunay triangulation. Both methods may be implemented by means of popular mathematic software (such as Wolfram Mathematica or Octave) and their applicability is confirmed experimentally.
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- luminous intensity angular distribution
- total luminous intensity distribution
- photometric data
- trigonometric interpolation
- discrete Fourier transformation
- piecewise-linear interpolation
- Delaunay triangulation
- coordinate system rotation
- coordinate transformation
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