Ellipse done

dxli · Feb 24, 2024 · b762cd0 · b762cd0
1 parent d4ff6ac
commit b762cd0
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/librecad/src/lib/engine/rs_ellipse.cpp b/librecad/src/lib/engine/rs_ellipse.cpp
@@ -1209,7 +1209,7 @@ RS_Vector RS_Ellipse::dualLineTangentPoint(const RS_Vector& line) const
     // u x + v y = 1
     // coordinates : dual
     // rotate (-a) : rotate(a)
-    RS_Vector uv = RS_Vector{line}.rotate(data.majorP.angle());
+    RS_Vector uv = RS_Vector{line}.rotate(-data.majorP.angle());
     // slope = -b c/ a s ( a s, - b c)
     // x a s - b c y =0 -> s/c = b y / a x
     // elliptical angle