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;
14: PetscInitialize(&argc, &argv, NULL, help);
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 0;
29: }
31: /*TEST
33: build:
34: requires: x
36: test:
37: output_file: output/ex1_1.out
39: TEST*/