C3DLight::SetTheta

Syntax:

SetTheta(float  theta)

Purpose:

Sets the angle, in radians, of a spotlight's inner cone.

Parameters:

theta - The new angle, in radians.

Returned value(s):

None

Application:

light1.SetTheta(3.1415/4.0)

Class Hierarchy

C3DObject

-------C3DLight

Additional Info:

A spotlight emits a cone of light. Only objects within the cone are illuminated. The cone produces light of two degrees of intensity, with a central brightly lit section (the umbra) that acts as a point source, and a surrounding dimly lit section (the penumbra) that merges with the surrounding deep shadow.

The theta angle is the angle of the umbra.  The allowed range of theta is [0, o].   The default for theta and phi are o/2 and o respectively.

See Also:

SetPhi