Fix #2894. Implement reflected ceiling plans. Note that this requires new bot build.

src/blenderbim/blenderbim/bim/module/drawing/decoration.py

@@ -520,7 +520,11 @@ class BaseDecorator:
             return matrix.inverted()[i].to_3d().normalized()
 
         text_dir_world_x_axis = get_basis_vector(obj.matrix_world)
-        text_dir = (camera.matrix_world.inverted().to_quaternion() @ text_dir_world_x_axis).to_2d().normalized()
+        camera_matrix = camera.matrix_world.copy()
+        camera_matrix[0][0] = 1
+        camera_matrix[1][1] = 1
+        camera_matrix[2][2] = 1
+        text_dir = (camera_matrix.inverted().to_quaternion() @ text_dir_world_x_axis).to_2d().normalized()
 
         pos = location_3d_to_region_2d(region, region3d, text_world_position)
         props = obj.BIMTextProperties

src/blenderbim/blenderbim/bim/module/drawing/operator.py

@@ -485,7 +485,7 @@ class CreateDrawing(bpy.types.Operator):
 
             drawing_elements = tool.Drawing.get_drawing_elements(self.camera_element)
 
-            self.setup_serialiser(ifc)
+            self.setup_serialiser(ifc, target_view)
             cache = IfcStore.get_cache()
             [cache.remove(guid) for guid in invalidated_guids]
             tree = ifcopenshell.geom.tree()
@@ -829,7 +829,7 @@ class CreateDrawing(bpy.types.Operator):
 
         return svg_path
 
-    def setup_serialiser(self, ifc):
+    def setup_serialiser(self, ifc, target_view):
         self.svg_settings = ifcopenshell.geom.settings(
             DISABLE_TRIANGULATION=True, STRICT_TOLERANCE=True, INCLUDE_CURVES=True
         )
@@ -853,6 +853,8 @@ class CreateDrawing(bpy.types.Operator):
         self.serialiser.setScale(self.scale)
         self.serialiser.setSubtractionSettings(ifcopenshell.ifcopenshell_wrapper.ALWAYS)
         self.serialiser.setUsePrefiltering(True)  # See #3359
+        if target_view == "REFLECTED_PLAN_VIEW":
+            self.serialiser.setMirrorY(True)
         # tree = ifcopenshell.geom.tree()
         # This instructs the tree to explode BReps into faces and return
         # the style of the face when running tree.select_ray()

src/blenderbim/blenderbim/bim/module/drawing/svgwriter.py

@@ -791,7 +791,14 @@ class SvgWriter:
             return matrix.inverted()[i].to_3d().normalized()
 
         text_dir_world_x_axis = get_basis_vector(text_obj.matrix_world)
-        text_dir = (self.camera.matrix_world.inverted().to_quaternion() @ text_dir_world_x_axis).to_2d().normalized()
+
+        # RCP cameras may be scaled, so reset scales.
+        camera_matrix = self.camera.matrix_world.copy()
+        camera_matrix[0][0] = 1
+        camera_matrix[1][1] = 1
+        camera_matrix[2][2] = 1
+
+        text_dir = (camera_matrix.inverted().to_quaternion() @ text_dir_world_x_axis).to_2d().normalized()
         angle = math.degrees(-text_dir.angle_signed(Vector((1, 0))))
 
         classes = self.get_attribute_classes(text_obj)

src/blenderbim/blenderbim/tool/drawing.py

@@ -450,7 +450,10 @@ class Drawing(blenderbim.core.tool.Drawing):
         elif target_view == "REFLECTED_PLAN_VIEW":
             if location_hint:
                 z = tool.Ifc.get_object(tool.Ifc.get().by_id(location_hint)).matrix_world.translation.z
-                return mathutils.Matrix(((-1, 0, 0, x), (0, 1, 0, y), (0, 0, -1, z + 1.6), (0, 0, 0, 1)))
+                m = mathutils.Matrix()
+                m[2][2] = -1
+                m.translation = (x, y, z + 1.6)
+                return m
             return mathutils.Matrix(((-1, 0, 0, 0), (0, 1, 0, 0), (0, 0, -1, 0), (0, 0, 0, 1)))
         elif target_view == "ELEVATION_VIEW":
             if location_hint == "NORTH":
@@ -677,6 +680,10 @@ class Drawing(blenderbim.core.tool.Drawing):
             ([m[0], m[3], m[6], m[9]], [m[1], m[4], m[7], m[10]], [m[2], m[5], m[8], m[11]], [0, 0, 0, 1])
         )
         obj.matrix_world = mat
+
+        if cls.get_drawing_target_view(drawing) == "REFLECTED_PLAN_VIEW":
+            obj.matrix_world[1][1] *= -1
+
         tool.Geometry.record_object_position(obj)
         tool.Collector.assign(obj)
 

src/blenderbim/blenderbim/tool/geometry.py

@@ -56,8 +56,13 @@ class Geometry(blenderbim.core.tool.Geometry):
 
     @classmethod
     def clear_scale(cls, obj):
+        # Note that clearing scale has no impact on cameras.
         if (obj.scale - Vector((1.0, 1.0, 1.0))).length > 1e-4:
-            if obj.data.users == 1:
+            if not obj.data:
+                obj.matrix_world[0][0] = 1
+                obj.matrix_world[1][1] = 1
+                obj.matrix_world[2][2] = 1
+            elif obj.data.users == 1:
                 context_override = {}
                 context_override["object"] = context_override["active_object"] = obj
                 context_override["selected_objects"] = context_override["selected_editable_objects"] = [obj]