DefinePoints[A,B,pv]

DefinePoints[{A1,B1,pv1}, ..., {An,Bn,pvn}]

A,A1, ..., An: names of declared points

B,B1, ..., Bn: names of declared points

pv,pv1, ..., pvn: vector specifications

The function DefinePoints defines a direct relation between two declared points by specifying the position vector from the first point to the second point. A pair of indirectly related points may not be defined.

The function DefinePoints results in permanent changes to the global variables GlobalPointDeclarations and GlobalPointDefinitions.

The syntax of a vector specification corresponds to that of the argument to the MakeTranslations procedure.

Restart;
DeclarePoints[Ap,Bp,Cp];
DeclareTriads[a,b,c];
DefinePoints[{Ap,Bp,a,1},{Bp,Cp,{b,2},{c,3}}];
GlobalPointDeclarations

$\left\{\mathrm{Ap}\to \left\{\mathrm{Bp}\right\},\mathrm{Bp}\to \left\{\mathrm{Ap},\mathrm{Cp}\right\},\mathrm{Cp}\to \left\{\mathrm{Bp}\right\}\right\}$

GlobalPointDefinitions

$\left\{\left\{\mathrm{Ap},\mathrm{Bp}\right\}\to \left\{''Type''\to ''Vector'',''Size''\to 1,1\to \left\{''Coordinates''\to \left\{1,0,0\right\},''Triad''\to a\right\}\right\},\left\{\mathrm{Bp},\mathrm{Ap}\right\}\to \left\{''Type''\to ''Vector'',''Size''\to 1,1\to \left\{''Coordinates''\to \left\{-1,0,0\right\},''Triad''\to a\right\}\right\},\left\{\mathrm{Bp},\mathrm{Cp}\right\}\to \left\{1\to \left\{''Coordinates''\to \left\{0,1,0\right\},''Triad''\to b\right\},''Type''\to ''Vector'',''Size''\to 2,2\to \left\{''Coordinates''\to \left\{0,0,1\right\},''Triad''\to c\right\}\right\},\left\{\mathrm{Cp},\mathrm{Bp}\right\}\to \left\{1\to \left\{''Coordinates''\to \left\{0,-1,0\right\},''Triad''\to b\right\},''Type''\to ''Vector'',''Size''\to 2,2\to \left\{''Coordinates''\to \left\{0,0,-1\right\},''Triad''\to c\right\}\right\}\right\}$

DeclarePoints, DeclareTriads, DefineObservers, DefineTriads