Warp wrote:
> 
>   What is the equation for the intersection line of two planes?
> 

Well, I'm making this up on the go, but:

The function for a plane is

x * Normal.x + y * Normal.y + z * Normal.z - Distance = 0

And along the intersection line, the functions of the two planes would be equal,
so the function should be:

F(Plane1) - F(Plane2) = 0

-- 
Margus Ramst

Personal e-mail: mar### [at] peakeduee
TAG (Team Assistance Group) e-mail: mar### [at] tagpovrayorg

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