commit b5bae9781df1204a7dc6ae8b4b1f605c05f0fd74
author Ben Carter <ben@shironekolabs.com> Tue Jul 07 16:19:27 2020 +0900
committer omar <omarcornut@gmail.com> Wed Jul 08 17:38:02 2020 +0200
tree 0bc42caca888e276014fc9f3e63619857096c86d
parent 78d6bdf08036fdeea08ee9e6a0191f058f89dca0

Texture-based thick lines:  Only use textured lines for integer line widths

imgui_draw.cpp

diff --git a/imgui_draw.cpp b/imgui_draw.cpp
index 24e8a65..15a6c6f 100644
--- a/imgui_draw.cpp
+++ b/imgui_draw.cpp
@@ -681,8 +681,8 @@
         const int integer_thickness = (int)thickness;
         const float fractional_thickness = thickness - integer_thickness;
 
-        // Do we want to draw this line using a texture?
-        const bool use_texture = (Flags & ImDrawListFlags_AntiAliasedLinesUseTex) && (integer_thickness < IM_DRAWLIST_TEX_AA_LINES_WIDTH_MAX);
+        // Do we want to draw this line using a texture? (for now, only draw integer-width lines using textures to avoid issues with the way scaling occurs)
+        const bool use_texture = (Flags & ImDrawListFlags_AntiAliasedLinesUseTex) && (integer_thickness < IM_DRAWLIST_TEX_AA_LINES_WIDTH_MAX) && (fractional_thickness >= -0.00001f) && (fractional_thickness <= 0.00001f);
 
         // We should never hit this, because NewFrame() doesn't set ImDrawListFlags_AntiAliasedLinesUseTexData unless ImFontAtlasFlags_NoAALines is off
         IM_ASSERT_PARANOID((!use_texture) || (!(_Data->Font->ContainerAtlas->Flags & ImFontAtlasFlags_NoAALines)));