Actual source code: ex2.c


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

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

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

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

 30: /*TEST

 32:    build:
 33:      requires: x

 35:    test:
 36:      output_file: output/ex1_1.out

 38: TEST*/