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--- source/CollisionSet.cpp.orig 2017-01-18 02:04:49 UTC
+++ source/CollisionSet.cpp
@@ -22,6 +22,7 @@ PARTICULAR PURPOSE. See the GNU General
#include <algorithm>
#include <numeric>
#include <set>
+#include <cstdlib>
using namespace std;
@@ -179,8 +180,8 @@ Body *CollisionSet::Line(const Projectil
int stepX = (x <= endX ? 1 : -1);
int stepY = (y <= endY ? 1 : -1);
// Calculate the slope of the line, shifted so it is positive in both axes.
- int mx = abs(endX - x);
- int my = abs(endY - y);
+ int mx = std::abs(endX - x);
+ int my = std::abs(endY - y);
// Behave as if each grid cell has this width and height. This guarantees
// that we only need to work with integer coordinates.
int scale = max(mx, 1) * max(my, 1);
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