Add support for arbitrary point annotations and survey point, traverse points, control points, spot elevations, etc.

src/blenderbim/blenderbim/bim/data/assets/symbols.svg

@@ -41,4 +41,17 @@
         <circle r="5" fill="white" stroke="black" style="stroke-width: 0.25;" />
         <line x1="-5" y1="0" x2="5" y2="0" style="stroke: black; stroke-width: 0.25;" />
     </g>
+    <g id="SurveyArea">
+        <circle r="1" fill="black" stroke="black" style="stroke-width: 0.25;" />
+    </g>
+    <g id="SurveyArea-CONTROLPOINT">
+        <path style="fill: white; stroke: black; stroke-width: 0.25;" d="M 2.286165,1.4798666 H -1.0000316e-7 -2.2861651 L -1.1430826,-0.5000101 -1.0000316e-7,-2.479888 1.1430827,-0.5000101 Z" />
+        <circle r="0.5" fill="black" stroke="black" style="stroke-width: 0.25;" />
+    </g>
+    <g id="SurveyArea-TRAVERSEPOINT">
+        <path style="fill: white; stroke: black; stroke-width: 0.5;" d="M -2,-2 2,2 M -2,2 2,-2" />
+    </g>
+    <g id="SurveyArea-SPOTELEVATION">
+        <path style="fill: white; stroke: black; stroke-width: 0.5;" d="M 0,-2 0,2 M -2,0 2,0" />
+    </g>
 </svg>

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

@@ -332,9 +332,10 @@ class SvgWriter:
             return
 
         classes = self.get_attribute_classes(obj)
-        if len(obj.data.polygons) == 0:
+        if len(obj.data.vertices) and not len(obj.data.edges):
-            self.draw_edge_annotation(obj, classes)
+            return self.draw_point_annotation(obj, classes)
-            return
+        elif len(obj.data.polygons) == 0:
+            return self.draw_edge_annotation(obj, classes)
 
         bm = bmesh.new()
         bm.from_mesh(obj.data)
@@ -837,6 +838,26 @@ class SvgWriter:
                 self.svg.add(tag)
             line_number += len(tag.elements)
 
+    def draw_point_annotation(self, obj, classes):
+        x_offset = self.raw_width / 2
+        y_offset = self.raw_height / 2
+
+        matrix_world = obj.matrix_world
+        projected_points = [self.project_point_onto_camera(matrix_world @ v.co) for v in obj.data.vertices]
+
+        element = tool.Ifc.get_entity(obj)
+        svg_id = str(ifcopenshell.util.element.get_predefined_type(element))
+
+        # EPset_AnnotationSurveyArea is not standard! See bSI-4.3 proposal #660.
+        point_type = ifcopenshell.util.element.get_pset(element, "EPset_AnnotationSurveyArea", "PointType")
+        if point_type:
+            svg_id += f"-{point_type}"
+
+        for symbol_position in projected_points:
+            symbol_position = Vector(((x_offset + symbol_position.x), (y_offset - symbol_position.y)))
+            symbol_position_svg = symbol_position * self.svg_scale
+            self.svg.add(self.svg.use(f"#{svg_id}", insert=symbol_position_svg))
+
     def draw_break_annotations(self, obj):
         x_offset = self.raw_width / 2
         y_offset = self.raw_height / 2