Quadrilateral (qdrltrl)

key: qdrltrl

type: (iiii)*

  1. integer: vertex index.
  2. integer: vertex index.
  3. integer: vertex index.
  4. integer: vertex index.

Description

A set of quadrilaterals defined by indices into the corresponding vertex list(s)

Conventions

By convention all quadrilaterals should be right handed.

Examples 

msh  % a one quadrilateral mesh
"" mtrlNm "mat" end
   vrtxPstn
     0.5 -0.5 0.0
     0.5  0.5 0.0
     -0.5  0.5 0.0
     -0.5 -0.5 0.0
   end
   vrtxUV    % used for texture mapping
     1.0 0.0
     1.0 1.0
     0.0 1.0
     0.0 0.0
   end
   qdrltrl
     0 1 2 3 
   end
end