floodFillGrid_step [1006206]

< > BotCompany Repo | #1006206 // floodFillGrid_step

JavaX fragment (include)

static Rect floodFillGrid_step(BitSet grid, int gw, int gh, int x, int y) {
  Rect r = null;
  new L<Pt> stack;
  stack.add(new Pt(x, y));
  while (nempty(stack)) {
    Pt p = popLast(stack);
    x = p.x;
    y = p.y;

    if (!(x < 0 || y < 0 || x >= gw || y >= gh)) {
      int idx = y*gw+x;
      
      if (grid.get(idx)) {
        grid.clear(idx);
        Rect me = new Rect(x, y, 1, 1);
        if (r == null)
          r = me;
        else
          r = rectUnion(r, me);

        stack.add(new Pt(x-1, y));
        stack.add(new Pt(x+1, y));
        stack.add(new Pt(x, y-1));
        stack.add(new Pt(x, y+1));
      }
    }
  }
  ret r;
}

Author comment

Began life as a copy of #1006204

Travelled to 14 computer(s): aoiabmzegqzx, bhatertpkbcr, cbybwowwnfue, cfunsshuasjs, gwrvuhgaqvyk, ishqpsrjomds, lpdgvwnxivlt, mqqgnosmbjvj, pyentgdyhuwx, pzhvpgtvlbxg, sawdedvomwva, tslmcundralx, tvejysmllsmz, vouqrxazstgt

Snippet ID:

#1006206

Snippet name:

floodFillGrid_step

Eternal ID of this version:

#1006206/1

Text MD5:

55baa54cf1270108a5e5ff3ce0ed6162

Author:

stefan

Category:

javax / imaging

Type:

JavaX fragment (include)

Public (visible to everyone):

Yes

Archived (hidden from active list):

Created/modified:

2016-12-23 13:58:23

Source code size:

676 bytes / 29 lines

Pitched / IR pitched:

No / No

Views / Downloads:

488 / 503

Referenced in:

[show references]

1	static Rect floodFillGrid_step(BitSet grid, int gw, int gh, int x, int y) {
2	Rect r = null;
3	new L<Pt> stack;
4	stack.add(new Pt(x, y));
5	while (nempty(stack)) {
6	Pt p = popLast(stack);
7	x = p.x;
8	y = p.y;
9
10	if (!(x < 0 \|\| y < 0 \|\| x >= gw \|\| y >= gh)) {
11	int idx = y*gw+x;
12
13	if (grid.get(idx)) {
14	grid.clear(idx);
15	Rect me = new Rect(x, y, 1, 1);
16	if (r == null)
17	r = me;
18	else
19	r = rectUnion(r, me);
20
21	stack.add(new Pt(x-1, y));
22	stack.add(new Pt(x+1, y));
23	stack.add(new Pt(x, y-1));
24	stack.add(new Pt(x, y+1));
25	}
26	}
27	}
28	ret r;
29	}