No comment. Sorry.

	converting
	asPrimitiveLight transformedBy:

	private
	setColor:

	shading
	computeAttenuationFor: computeDirectionTo: computeSpotFactor: shadeVertexBuffer:with:into:

	testing
	hasAmbientPart hasDiffusePart hasSpecularPart hasSpot isAttenuated

	accessing	top
	direction If the light is directional, return the NORMALIZED direction of the light
	hotSpotDeltaCosine Return the cosine value of the delta radius of a spot light (the fall off region)
	hotSpotMaxCosine Return the cosine value of the outer radius of a spot light (the unlit region)
	hotSpotMinCosine Return the cosine value of the inner radius of a spot light (the fully lit region)
	lightColor
	lightColor:
	spotExponent Return the exponent to be used for the spot fall off computation

	converting	top
	asPrimitiveLight Convert the receiver into a B3DPrimitiveLight that can be handled by the shader primitive directly. Light sources that cannot be represented as primitive should return nil. This will result in the callback of #shadeVertexBuffer from the shader.
	transformedBy:

	private	top
	setColor:

	shading	top
	computeAttenuationFor:
	computeDirectionTo:
	computeSpotFactor: Compute the spot factor for a spot light
	shadeVertexBuffer:with:into: This is the generic shading function similar to the primitive. Subclasses may implement optimized versions but should evaluate exactly to the same value as in here if they are to be converted into B3DPrimitiveLights.

	testing	top
	hasAmbientPart Return true if the receiver contains an ambient part in its color
	hasDiffusePart Return true if the receiver contains a diffuse part in its color
	hasSpecularPart Return true if the receiver contains a specular part in its color
	hasSpot Return true if the receiver has a hot spot.
	isAttenuated Return true if the receiver contains an attenuation. If so, #computeAttenuationFor: must return the attenuation for the given distance.

	instance creation	top
	color: