TKE_Spot_Light

Opcode

ASCII	^
Hexadecimal	5E
Decimal	94

Operands

Point position, Point target, Byte options,

[Float outer], [Float inner], [Float concentration]

position	location of spot light
target	aiming pointof the light
options	bitmask of optional settings
outer	size of outermost cone of light
inner	size of center ‘hotspot’ of light
concentration	falloff factor applied away from spot light center line

Notes

A spot light provides a number of lighting affects. It normally provides a conical area of illumination, full intensity within the inner cone, and dropping to zero at the outer cone. Concentration, if specified, is an additional falloff factor (the value is the cosine of the angle from the centerline of the cone to the point being lit (as measured from the light position), raised to the concentration power.

For further details on what these options mean in HOOPS/3dGS please refer to the Insert_Spot_Light specification in the 3dGS Reference Manual.

Options

01	outer cone is specified, value is degrees out from centerline
02	outer cone is specified, value is the diameter of the cone at the target
04	inner cone is specified, if bit 08 is not set, value is degrees out from centerline, otherwise value is percentage of outer cone angle
08	inner cone is specified, if bit 04 is not set, value is the diameter of the cone at the target, otherwise value is percentage of outer cone angle
10	Light position and target are relative to the camera’s position and target
20	Concentration value is specified