a3d::Attenuation Struct Reference

Distance-attenuation coefficients for point and spot lights. More...

#include <a3d/visual/light/Attenuation.h>

Static Public Member Functions
static Attenuation	FromRange (float range, float p=0.01f)
	Returns quadratic attenuation that falls to the fraction p at distance range. More...

Public Attributes
float	constant = 1.0f
	Constant denominator coefficient. More...
float	linear = 0.0f
	Linear-distance denominator coefficient. More...
float	quadratic = 0.1f
	Squared-distance denominator coefficient. More...

Detailed Description

Distance-attenuation coefficients for point and spot lights.

Light intensity is scaled by 1 / (constant + linear * d + quadratic * d^2), where d is the light-to-surface distance.

Definition at line 20 of file Attenuation.h.

Member Function Documentation

FromRange()

static Attenuation a3d::Attenuation::FromRange ( float  range, float  p = 0.01f  )

static

Returns quadratic attenuation that falls to the fraction p at distance range.

The returned coefficients use constant = 1 and linear = 0.

Member Data Documentation

constant

float a3d::Attenuation::constant = 1.0f

Constant denominator coefficient.

Definition at line 33 of file Attenuation.h.

linear

float a3d::Attenuation::linear = 0.0f

Linear-distance denominator coefficient.

Definition at line 34 of file Attenuation.h.

quadratic

float a3d::Attenuation::quadratic = 0.1f

Squared-distance denominator coefficient.

Definition at line 35 of file Attenuation.h.

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The documentation for this struct was generated from the following file:

• a3d/visual/light/Attenuation.h