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DrawList: PathArcTo(): fixed erroneous segment count for small arcs on large circles. (#9331, #9313)

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thedmd
2026-03-29 10:20:24 +02:00
committed by ocornut
parent b62cf3894b
commit bd3c925680
2 changed files with 4 additions and 1 deletions
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3
docs/CHANGELOG.txt
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@@ -130,6 +130,9 @@ Other Changes:
as a convenience for when using e.g. InvisibleButton().
- Focus: fixed fallback "Debug" window temporarily taking focus and setting io.WantCaptureKeyboard
for one frame on e.g. application boot if no other windows are submitted. (#9243)
- DrawList:
- PathArcTo(): fixed erroneous segment count for pathologically small arcs on large
circles. (#9331, #9313) [@thedmd, @epajarre]
- Memory:
- Discard/GC of ImDrawList buffers for unused windows favor restoring them to
~Size*1.05 instead of Capacity when awakening again. Facilitate releasing ImDrawList

2
imgui_draw.cpp
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@@ -1312,7 +1312,7 @@ void ImDrawList::PathArcTo(const ImVec2& center, float radius, float a_min, floa
{
const float arc_length = ImAbs(a_max - a_min);
const int circle_segment_count = _CalcCircleAutoSegmentCount(radius);
const int arc_segment_count = ImMax((int)ImCeil(circle_segment_count * arc_length / (IM_PI * 2.0f)), (int)(2.0f * IM_PI / arc_length));
const int arc_segment_count = ImMax((int)ImCeil(circle_segment_count * arc_length / (IM_PI * 2.0f)), 1);
_PathArcToN(center, radius, a_min, a_max, arc_segment_count);
}
}