From 91b57c972703c6f5cc55fbb63b37d4a30900fc95 Mon Sep 17 00:00:00 2001
From: "Zheng, Lei" <realthunder.dev@gmail.com>
Date: Mon, 3 Sep 2018 14:43:58 +0800
Subject: [PATCH] constraint: fix addMidPoint()

---
 constraint.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/constraint.py b/constraint.py
index 02e25d2..fd091aa 100644
--- a/constraint.py
+++ b/constraint.py
@@ -1519,6 +1519,20 @@ class MidPoint(BaseSketch):
     _iconName = 'Assembly_ConstraintMidPoint.svg'
     _tooltip='Add a "{}" to constrain a point to the middle point of a line.'
 
+    @classmethod
+    def prepare(cls,obj,solver):
+        func = cls.constraintFunc(obj,solver)
+        if not func:
+            return
+        params = cls.getPropertyValues(obj) + cls.getEntities(obj,solver)
+        # temparary fix of slvs.addMidPoint(), which should have made wrkpln
+        # argument optional and defaults to 0
+        if len(params)==2:
+            params.append(0)
+        ret = func(*params,group=solver.group)
+        solver.system.log('{}: {}'.format(cstrName(obj),ret))
+        return ret
+
 
 class Diameter(BaseSketch):
     _id = 25