DrawIsNull

Returns PETSC_TRUE if draw is a null draw object.

Synopsis

#include "draw.h" 
int DrawIsNull(Draw draw,PetscTruth *yes)
Not collective

Input Parameter

draw -the draw context

Output Parameter

yes -PETSC_TRUE if it is a null draw object; otherwise PETSC_FALSE

Level:advanced
Location:src/sys/src/draw/interface/dline.c
Graphics (Draw) Index
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