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Fix crash on hovering link graph link where both ends have same position

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See: #468
This commit is contained in:
Jonathan G Rennison
2022-12-27 19:46:32 +00:00
parent 4df56ec1ef
commit a72d99821a
1 changed files with 3 additions and 1 deletions
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4
src/linkgraph/linkgraph_gui.cpp
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@@ -506,7 +506,9 @@ bool LinkGraphOverlay::ShowTooltip(Point pt, TooltipCloseCondition close_cond)
/* Check the distance from the cursor to the line defined by the two stations. */
auto check_distance = [&]() -> bool {
int64 a = ((ptb.x - pta.x) * (pta.y - pt.y) - (pta.x - pt.x) * (ptb.y - pta.y));
return ((a * a) / ((ptb.x - pta.x) * (ptb.x - pta.x) + (ptb.y - pta.y) * (ptb.y - pta.y))) <= 16;
int64 b = ((ptb.x - pta.x) * (ptb.x - pta.x) + (ptb.y - pta.y) * (ptb.y - pta.y));
if (b == 0) return false;
return ((a * a) / b) <= 16;
};
const auto &link = i->prop;
if ((link.Usage() > 0 || (_ctrl_pressed && link.capacity > 0)) &&