IESEmission Class Reference

IES angular emission. More...

Public Member Functions
bool	init (const OfObject &object, double cone_half_angle, bool is_spot)
	Initialization of the parameters. Check if the filename is a tex file, get the UI parameters values.
double	evaluate (const GMathVec3d &local_light_dir) const
	Evaluate the angular distribution for an IES Emission.
const double &	get_mix () const
double	get_scaled_max_colatitude () const
bool	is_axially_symmetric () const

Detailed Description

IES angular emission.

This class initialises on a .tex or .ies file, handles scaling, mixing and different orientations for spot vs. sphere light.

Member Function Documentation

double IESEmission::evaluate ( const GMathVec3d &  local_light_dir ) const

inline

Evaluate the angular distribution for an IES Emission.

The local light direction is given in local space, pointing toward the surface position. As IES textures are single channel - or with the the same value on all the channels - we return only the R channel.