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Lighting the environment SpotLight Class Methods

Method	Default
SpotLight( )	-
void setDirection( Vector3f dir )	0.0, 0.0, -1.0
void setSpreadAngle( float angle )	PI
void setConcentration( float concen )	0.0

Spread angle varies from 0.0 to PI/2.0 radians

A value of PI radians makes the light a PointLight

Concentrations vary from 0.0 (unfocused) to 128.0 (focused)