Add support for BCFXML export of IFC Clash results

src/bcf/bcf/bcfxml.py

@@ -345,7 +345,7 @@ class BcfXml:
 
     def write_viewpoint(self, viewpoint, topic):
         document = minidom.Document()
-        root = self._create_element(document, "VisualizationInfo", { "Guid": viewpoint.guid })
+        root = self._create_element(document, "VisualizationInfo", {"Guid": viewpoint.guid})
         self.write_viewpoint_components(viewpoint, root)
         self.write_viewpoint_orthogonal_camera(viewpoint, root)
         self.write_viewpoint_perspective_camera(viewpoint, root)

src/ifcblenderexport/blenderbim/bim/module/bcf/operator.py

@@ -2,6 +2,8 @@ import os
 import bpy
 import bcf
 from . import bcfstore
+from math import radians, degrees, atan, tan, cos, sin
+from mathutils import Vector, Matrix, Euler, geometry
 
 class NewBcfProject(bpy.types.Operator):
     bl_idname = "bim.new_bcf_project"

src/ifcblenderexport/blenderbim/bim/module/bcf/prop.py

@@ -18,32 +18,37 @@ bcfviewpoints_enum = None
 
 
 def updateBcfReferenceLink(self, context):
-    bpy.ops.bim.edit_bcf_reference_links()
+    if bpy.context.scene.BCFProperties.is_loaded:
+        bpy.ops.bim.edit_bcf_reference_links()
 
 
 def updateBcfLabel(self, context):
-    bpy.ops.bim.edit_bcf_labels()
+    if bpy.context.scene.BCFProperties.is_loaded:
+        bpy.ops.bim.edit_bcf_labels()
 
 
 def updateBcfProjectName(self, context):
-    bpy.ops.bim.edit_bcf_project_name()
+    if bpy.context.scene.BCFProperties.is_loaded:
+        bpy.ops.bim.edit_bcf_project_name()
 
 
 def updateBcfAuthor(self, context):
-    bpy.ops.bim.edit_bcf_author()
+    if bpy.context.scene.BCFProperties.is_loaded:
+        bpy.ops.bim.edit_bcf_author()
 
 
 def updateBcfTopicName(self, context):
-    bpy.ops.bim.edit_bcf_topic_name()
+    if bpy.context.scene.BCFProperties.is_loaded:
+        bpy.ops.bim.edit_bcf_topic_name()
 
 
 def updateBcfTopicIsEditable(self, context):
-    if not self.is_editable:
+    if bpy.context.scene.BCFProperties.is_loaded and not self.is_editable:
         bpy.ops.bim.edit_bcf_topic()
 
 
 def updateBcfCommentIsEditable(self, context):
-    if not self.is_editable:
+    if bpy.context.scene.BCFProperties.is_loaded and not self.is_editable:
         bpy.ops.bim.edit_bcf_comment(comment_guid = self.name)
 
 

src/ifcblenderexport/blenderbim/bim/operator.py

@@ -1568,11 +1568,12 @@ class SelectSmartGroupedClashesPath(bpy.types.Operator):
 class ExecuteIfcClash(bpy.types.Operator):
     bl_idname = "bim.execute_ifc_clash"
     bl_label = "Execute IFC Clash"
-    filename_ext = ".json"
+    filename_ext = ".bcf"
     filepath: bpy.props.StringProperty(subtype="FILE_PATH")
 
     def invoke(self, context, event):
-        self.filepath = bpy.path.ensure_ext(bpy.data.filepath, ".json")
+        if ".json" not in bpy.data.filepath:
+            self.filepath = bpy.path.ensure_ext(bpy.data.filepath, ".bcf")
         WindowManager = context.window_manager
         WindowManager.fileselect_add(self)
         return {"RUNNING_MODAL"}
@@ -1581,7 +1582,8 @@ class ExecuteIfcClash(bpy.types.Operator):
         import ifcclash
 
         settings = ifcclash.IfcClashSettings()
-        self.filepath = bpy.path.ensure_ext(self.filepath, ".json")
+        if ".json" not in self.filepath:
+            self.filepath = bpy.path.ensure_ext(self.filepath, ".bcf")
         settings.output = self.filepath
         settings.logger = logging.getLogger("Clash")
         settings.logger.setLevel(logging.DEBUG)

src/ifcclash/ifcclash.py

@@ -11,6 +11,7 @@ import sys
 import argparse
 import logging
 
+
 class Mesh:
     faces: []
     vertices: []
@@ -153,6 +154,64 @@ class IfcClasher:
         return None
 
     def export(self):
+        if len(self.settings.output) > 4 and self.settings.output[-4:] == ".bcf":
+            return self.export_bcfxml()
+        self.export_json()
+
+    def export_bcfxml(self):
+        import bcf
+        import bcf.bcfxml
+
+        for i, clash_set in enumerate(self.clash_sets):
+            bcfxml = bcf.bcfxml.BcfXml()
+            bcfxml.new_project()
+            bcfxml.project.name = clash_set["name"]
+            bcfxml.edit_project()
+            for key, clash in clash_set["clashes"].items():
+                topic = bcf.data.Topic()
+                topic.title = "{}/{} and {}/{}".format(
+                    clash["a_ifc_class"], clash["a_name"], clash["b_ifc_class"], clash["b_name"]
+                )
+                topic = bcfxml.add_topic(topic)
+                viewpoint = bcf.data.Viewpoint()
+                viewpoint.perspective_camera = bcf.data.PerspectiveCamera()
+                position = np.array(clash["position"])
+                point = position + np.array((5, 5, 5)) # Dumb, but works!
+                viewpoint.perspective_camera.camera_view_point.x = point[0]
+                viewpoint.perspective_camera.camera_view_point.y = point[1]
+                viewpoint.perspective_camera.camera_view_point.z = point[2]
+                mat = self.get_track_to_matrix(point, position)
+                viewpoint.perspective_camera.camera_direction.x = mat[0][2] * -1
+                viewpoint.perspective_camera.camera_direction.y = mat[1][2] * -1
+                viewpoint.perspective_camera.camera_direction.z = mat[2][2] * -1
+                viewpoint.perspective_camera.camera_up_vector.x = mat[0][1]
+                viewpoint.perspective_camera.camera_up_vector.y = mat[1][1]
+                viewpoint.perspective_camera.camera_up_vector.z = mat[2][1]
+                bcfxml.add_viewpoint(topic, viewpoint)
+            if i == 0:
+                bcfxml.save_project(self.settings.output)
+            else:
+                bcfxml.save_project(self.settings.output + f".{i}")
+
+    # https://blender.stackexchange.com/questions/68834/recreate-to-track-quat-with-two-vectors-using-python/141706#141706
+    def get_track_to_matrix(self, camera_position, target_position):
+        camera_direction = camera_position - target_position
+        camera_direction = camera_direction / np.linalg.norm(camera_direction)
+        camera_right = np.cross(np.array([0.0, 0.0, 1.0]), camera_direction)
+        camera_right = camera_right / np.linalg.norm(camera_right)
+        camera_up = np.cross(camera_direction, camera_right)
+        camera_up = camera_up / np.linalg.norm(camera_up)
+        rotation_transform = np.zeros((4, 4))
+        rotation_transform[0, :3] = camera_right
+        rotation_transform[1, :3] = camera_up
+        rotation_transform[2, :3] = camera_direction
+        rotation_transform[-1, -1] = 1
+        translation_transform = np.eye(4)
+        translation_transform[:3, -1] = - camera_position
+        look_at_transform = np.matmul(rotation_transform, translation_transform)
+        return np.linalg.inv(look_at_transform)
+
+    def export_json(self):
         results = self.clash_sets.copy()
         for result in results:
             del result["a_cm"]
@@ -324,13 +383,13 @@ class IfcClasher:
             if not "clashes" in clash_set.keys():
                 continue
             smart_groups = defaultdict(list)
-            for clash_id, content in clash_set['clashes'].items():
+            for clash_id, content in clash_set["clashes"].items():
                 if "smart_group" in content:
                     object_id_list = list()
                     # Clash has been grouped, let's extract it.
-                    object_id_list.append(content['a_global_id'])
+                    object_id_list.append(content["a_global_id"])
-                    object_id_list.append(content['b_global_id'])
+                    object_id_list.append(content["b_global_id"])
-                    smart_groups[content['smart_group']].append(object_id_list)
+                    smart_groups[content["smart_group"]].append(object_id_list)
             count_of_smart_groups += len(smart_groups)
             output_clash_sets[clash_set["name"]].append(smart_groups)
 
@@ -346,8 +405,10 @@ class IfcClasher:
                 i += 1
 
         count_of_final_clash_sets = len(output_clash_sets)
-        print(f"Took {count_of_input_clashes} clashes in {count_of_clash_sets} clash sets and turned", 
+        print(
-            f"them into {count_of_smart_groups} smart groups in {count_of_final_clash_sets} clash sets")
+            f"Took {count_of_input_clashes} clashes in {count_of_clash_sets} clash sets and turned",
+            f"them into {count_of_smart_groups} smart groups in {count_of_final_clash_sets} clash sets",
+        )
 
         return output_clash_sets