gl:eval-coord-2

(gl:eval-coord-2 opengl u v)


Description:

glEvalCoord1 evaluates enabled two-dimensional maps at argument u.  glEvalCoord2 does the same for two-dimensional maps using two domain values, u and v.  To define a map, call glMap1 and glMap2; to enable and disable       it, call glEnable and glDisable.

 


Arguments:

              v -- Specifies  a value that is the domain coordinate v to the basis function defined in a previous glMap2 com-

          mand.  This argument is not present in a glEvalCoord1 command.

         opengl -- opengl instance

              u -- Specifies a value that is the domain coordinate u to the basis function defined in a  previous  glMap1  or

          glMap2 command.


Returns: boolean


Examples:



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