FGFS-4.1/simgear
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Protect against division by zero in QuadTreeBuilder

Browse Source 
This could only happen when there's one leaf in the tree, or all the objects
happen to have the same position. Noticed by Csaba Halaz
This commit is contained in:
Tim Moore 2009-01-19 00:04:59 +01:00
parent db8f7f21e8
commit 1a8fd62680
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
simgear/scene/util/QuadTreeBuilder.hxx
View File

@ -80,10 +80,14 @@ public:
{
using namespace osg;
const Vec3 center(_getLocalCoords(obj));
int x = (int)(_dimension * (center.x() - _min.x())
int x = 0;
if (_max.x() != _min.x())
x = (int)(_dimension * (center.x() - _min.x())
/ (_max.x() - _min.x()));
x = clampTo(x, 0, (_dimension - 1));
int y = (int)(_dimension * (center.y() - _min.y())
int y = 0;
if (_max.y() != _min.y())
y = (int)(_dimension * (center.y() - _min.y())
/ (_max.y() - _min.y()));
y = clampTo(y, 0, (_dimension -1));
_addLeafObject(_leaves(y, x), obj);