Answered
I can use x(A), y(A) and z(A) directly from the point A(x,y,z).
When I define a line l I get a direction vector multiplied by gama. How can I use the values of this direction vector independently?
The same question 
I can use x(A), y(A) and z(A) directly from the point A(x,y,z).
When I define a line l I get a direction vector multiplied by gama. How can I use the values of this direction vector independently?
How is the line defined? It's easier if you post your .ggb file
f line
then x(direction(f)) y(direction(f)) z(direction(f))
or
Vector((1, 0, 0)) *f
Vector((0, 1, 0)) *f
Vector((0, 0, 1)) *f
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