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;
12: int x = 0,y = 0,width = 256,height = 256,i;
14: PetscInitialize(&argc,&argv,NULL,help);if (ierr) return ierr;
15: PetscDrawCreate(PETSC_COMM_WORLD,0,"Title",x,y,width,height,&draw);
16: PetscDrawSetFromOptions(draw);
17: MPI_Comm_size(PETSC_COMM_WORLD,&size);
18: MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
19: for (i=rank; i<height; i+=size) {
20: PetscReal y = ((PetscReal)i)/(height-1);
21: PetscDrawLine(draw,0.0,y,1.0,y,i%256);
22: }
23: PetscDrawFlush(draw);
24: PetscDrawPause(draw);
25: PetscDrawSave(draw);
26: PetscDrawDestroy(&draw);
27: PetscFinalize();
28: return ierr;
29: }
31: /*TEST
33: build:
34: requires: x
36: test:
37: output_file: output/ex1_1.out
39: TEST*/