From d94c5a93c32a57d8f142809ef28de9febeaa6405 Mon Sep 17 00:00:00 2001
From: pojienie <pojienie@gmail.com>
Date: Jun 30 2020 11:21:18 +0000
Subject: prevent guide lines from jumping around in MultiArc


---

diff --git a/toonz/sources/tnztools/geometrictool.cpp b/toonz/sources/tnztools/geometrictool.cpp
index 1a09edf..2ef20f5 100644
--- a/toonz/sources/tnztools/geometrictool.cpp
+++ b/toonz/sources/tnztools/geometrictool.cpp
@@ -2391,6 +2391,7 @@ void MultiArcPrimitive::leftButtonUp(const TPointD &pos, const TMouseEvent &) {
 
   switch (m_clickNumber) {
   case 0:
+    m_endPoint = newPos;
     if (app->getCurrentObject()->isSpline()) {
       m_isEditing = true;
       m_color     = TPixel32::Red;
@@ -2411,11 +2412,12 @@ void MultiArcPrimitive::leftButtonUp(const TPointD &pos, const TMouseEvent &) {
     break;
 
   case 1:
-    points[0] = TThickPoint(m_startPoint, thick);
-    points[8] = TThickPoint(m_endPoint, thick);
-    points[4] = TThickPoint(0.5 * (points[0] + points[8]), thick);
-    points[2] = TThickPoint(0.5 * (points[0] + points[4]), thick);
-    points[6] = TThickPoint(0.5 * (points[4] + points[8]), thick);
+    m_centralPoint = newPos;
+    points[0]      = TThickPoint(m_startPoint, thick);
+    points[8]      = TThickPoint(m_endPoint, thick);
+    points[4]      = TThickPoint(0.5 * (points[0] + points[8]), thick);
+    points[2]      = TThickPoint(0.5 * (points[0] + points[4]), thick);
+    points[6]      = TThickPoint(0.5 * (points[4] + points[8]), thick);
 
     points[1]    = TThickPoint(0.5 * (points[0] + points[2]), thick);
     points[3]    = TThickPoint(0.5 * (points[2] + points[4]), thick);
@@ -2426,6 +2428,7 @@ void MultiArcPrimitive::leftButtonUp(const TPointD &pos, const TMouseEvent &) {
     break;
 
   case 2:
+    m_startPoint = newPos;
     if (!m_isSingleArc) {
       m_clickNumber = 1;
       m_startPoint  = m_endPoint;