From 8284ed0cdb49fc9c9757bea72718178a817b397c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bruno=20Perdig=C3=A3o?= <bruno@brunopo.com>
Date: Sat, 3 Aug 2024 09:26:50 -0300
Subject: [PATCH] Fix to allow calculations to work when no point was added yet

---
 .../blenderbim/bim/module/model/decorator.py           | 10 +++++++---
 src/blenderbim/blenderbim/bim/module/model/wall.py     |  4 ++--
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/blenderbim/blenderbim/bim/module/model/decorator.py b/src/blenderbim/blenderbim/bim/module/model/decorator.py
index 6dfff9d0e6..a83c34af21 100644
--- a/src/blenderbim/blenderbim/bim/module/model/decorator.py
+++ b/src/blenderbim/blenderbim/bim/module/model/decorator.py
@@ -335,12 +335,16 @@ class WallPolylineDecorator:
     def calculate_distance_and_angle(cls, context, is_input_on):
         try:
             polyline_data = context.scene.BIMModelProperties.polyline_point
-            snap_prop = context.scene.BIMModelProperties.snap_mouse_point[0]
             last_point_data = polyline_data[len(polyline_data) - 1]
         except:
-            return
+            last_point_data = None
         
-        last_point = Vector((last_point_data.x, last_point_data.y, last_point_data.z))
+        snap_prop = context.scene.BIMModelProperties.snap_mouse_point[0]
+        
+        if last_point_data:
+            last_point = Vector((last_point_data.x, last_point_data.y, last_point_data.z))
+        else:
+            last_point = Vector((0, 0, 0,))
         
         if is_input_on:
             snap_vector = Vector((float(cls.input_panel['X']), float(cls.input_panel['Y']), 0))
diff --git a/src/blenderbim/blenderbim/bim/module/model/wall.py b/src/blenderbim/blenderbim/bim/module/model/wall.py
index 9d1ae66dac..431ab4cf2f 100644
--- a/src/blenderbim/blenderbim/bim/module/model/wall.py
+++ b/src/blenderbim/blenderbim/bim/module/model/wall.py
@@ -540,8 +540,6 @@ class DrawPolylineWall(bpy.types.Operator):
         if event.type == 'MOUSEMOVE':
             self.mousemove_count += 1
             tool.Blender.update_viewport()
-            WallPolylineDecorator.set_mouse_position(context, event)
-            self.input_panel = WallPolylineDecorator.calculate_distance_and_angle(context, self.is_input_on)
             self.is_input_on = False
         else:
             self.mousemove_count = 0
@@ -553,6 +551,8 @@ class DrawPolylineWall(bpy.types.Operator):
 
         if self.mousemove_count > 3:
             self.snaping_movement(context, event)
+            WallPolylineDecorator.set_mouse_position(context, event)
+            self.input_panel = WallPolylineDecorator.calculate_distance_and_angle(context, self.is_input_on)
             return {'RUNNING_MODAL'}
 
         if event.value == 'RELEASE' and event.type == 'LEFTMOUSE':