2: static char help[] = "Demonstrates use of color map\n";


  5:  #include <petscsys.h>
  6:  #include <petscdraw.h>

  8: int main(int argc,char **argv)
  9: {
 10:   PetscDraw      draw;
 11:   PetscMPIInt    size,rank;
 13:   int            x = 0,y = 0,width = 256,height = 256,i;

 15:   PetscInitialize(&argc,&argv,NULL,help);
 16:   PetscDrawCreate(PETSC_COMM_WORLD,0,"Title",x,y,width,height,&draw);
 17:   PetscDrawSetFromOptions(draw);
 18:   MPI_Comm_size(PETSC_COMM_WORLD,&size);
 19:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
 20:   for (i=rank; i<height; i+=size) {
 21:     PetscReal y = ((PetscReal)i)/(height-1);
 22:     PetscDrawLine(draw,0.0,y,1.0,y,i%256);
 23:   }
 24:   PetscDrawFlush(draw);
 25:   PetscDrawPause(draw);
 26:   PetscDrawSave(draw);
 27:   PetscDrawDestroy(&draw);
 28:   PetscFinalize();
 29:   return ierr;
 30: }



 34: /*TEST

 36:    build:
 37:      requires: x

 39:    test:
 40:      output_file: output/ex1_1.out

 42: TEST*/