perm filename TMP[DOC,BGB] blob
sn#095878 filedate 1974-04-06 generic text, type T, neo UTF8
~λ13;P99;F1~F2~JU;FA
4.6 CUT COMMANDS.
~JAFA
"X CUT <X> <Y> <Z>" Cut Bodies, Faces and Edges.
"αX CUT <X> <Y> <Z>" Cut Faces and Edges.
"βX CUT <X> <Y> <Z>" Cut Edges.
"εX CUT" Kill Temporaries (Uncut).
~JUFA The cut command argument specifies a cutting plane in terms
of a vector from the world origin; the direction of the vector is
normal to the desired plane, and the magnitude of the vector is the
distance of the origin from the desired plane.
~H2;X1.0;L0,50;*FIGCUT;I1300,0;JUFA
4.7 Parts Tree Structure - The Attach and Detach Commands.
~JAFA "A" ATTACH
"D" DETACH
~JUFA The parts' tree commands "A"
attach and and "D" detach, allow bodies to be connected into a tree
structure without affecting their faces, edges or vertices. The "A"
command links the body in the top of the stack to the body in
the second stack position as a sub-part (or child). The detach
command unlinks a body from its parent. Certain operations such as
the Euclidean transformations apply to a body and all its
descendents. If the first two entities are
not bodies then these commands are no-operations. Because of the
implementation, the parts structure is always kept a tree;
circularities and incest are prevented.