From 288e36764cf961bcb2bad6c2810c0de5344e77da Mon Sep 17 00:00:00 2001
From: jaseg <git@jaseg.de>
Date: Sun, 16 Apr 2023 20:13:24 +0200
Subject: [PATCH] svg-flatten: Fix broken math in transform inversion

---
 svg-flatten/include/geom2d.hpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/svg-flatten/include/geom2d.hpp b/svg-flatten/include/geom2d.hpp
index 7c3b5ba..34455cd 100644
--- a/svg-flatten/include/geom2d.hpp
+++ b/svg-flatten/include/geom2d.hpp
@@ -234,8 +234,8 @@ namespace gerbolyze {
                     return *this;
                 }
 
-                *this = xform2d(yy/det, -yx/det,
-                        -xy/det, xx/det,
+                *this = xform2d(yy/det, -xy/det,
+                        -yx/det, xx/det,
                         (xy*y0 - yy*x0)/det, (yx*x0 - xx*y0)/det);
 
                 if (success_out)
@@ -300,8 +300,8 @@ namespace gerbolyze {
                 ostringstream os;
                 os << "xform2d< " << setw(5);
                 os << xx << ", " << xy << ", " << x0 << " / ";
-                os << yy << ", " << yx << ", " << y0 << " / ";
-                os << "θ=" << theta << ", m=" << m << " s=(" << s_x << ", " << s_y << " | ";
+                os << yx << ", " << yy << ", " << y0 << " / ";
+                os << "θ=" << theta << ", m=" << m << " s=(" << s_x << ", " << s_y << ") | ";
                 os << "f_min=" << f_min << ", f_max=" << f_max;
                 os << " >";
                 return os.str();