Fall annotations

Added fall annotation - they appear both in viewport and svg.

There are three types of annotations (SLOPE_ANGLE, SLOPE_FRACTION, SLOPE_PERCENT) you can switch them by changing annotation's ObjectType to one of those values.

By default it uses angle representation.

src/blenderbim/blenderbim/bim/data/styles/default.css

@@ -33,7 +33,11 @@ text { /* 2.5mm */ fill: black; stroke: none; font-family: 'OpenGost Type B TT',
 .PredefinedType-PLANLEVEL { marker-end: url(#plan-level-marker); }
 .PredefinedType-DIMENSION { marker-start: url(#dimension-marker-start); marker-end: url(#dimension-marker-end); }
 .PredefinedType-ANGLE { marker-start: url(#angle-marker-start); marker-end: url(#angle-marker-end); }
-.PredefinedType-RADIUS { marker-end: url(#radius-marker-end); }
+.PredefinedType-RADIUS { marker-end: url(#fall-marker-end); }
+.PredefinedType-FALL { marker-end: url(#radius-marker-end); }
+.PredefinedType-SLOPEANGLE { marker-end: url(#radius-marker-end); }
+.PredefinedType-SLOPEPERCENT { marker-end: url(#radius-marker-end); }
+.PredefinedType-SLOPEFRACTION { marker-end: url(#radius-marker-end); }
 .PredefinedType-DIAMETER { marker-start: url(#diameter-marker-start); marker-end: url(#diameter-marker-end); }
 .PredefinedType-HIDDENLINE { stroke-dasharray: 3, 2; }
 .PredefinedType-STAIRARROW { marker-start: url(#stair-marker-start); marker-end: url(#stair-marker-end); }

src/blenderbim/blenderbim/bim/data/templates/markers.svg

@@ -19,6 +19,12 @@
             <path d="M 0 3.5 L 0 10.5 L 10 7" class="annotation" style="fill:black;" />
         </g>
     </marker>
+    <!-- same as for the radius -->
+    <marker id="fall-marker-end" markerHeight="14" markerWidth="11" orient="auto" refX="10" refY="7">
+        <g>
+            <path d="M 0 3.5 L 0 10.5 L 10 7" class="annotation" style="fill:black;" />
+        </g>
+    </marker>
     <marker id="angle-marker-start" markerHeight="14" markerWidth="11" orient="auto" refX="1" refY="7">
         <g>
             <path d="M 11 3.5 L 11 10.5 L 1 7" class="annotation" style="fill:black;" />

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

@@ -26,7 +26,7 @@ import bmesh
 import ifcopenshell
 import blenderbim.tool as tool
 import blenderbim.bim.module.drawing.helper as helper
-from math import acos, pi
+from math import acos, pi, atan, degrees
 from functools import reduce
 from itertools import chain
 from bpy.types import SpaceView3D
@@ -236,12 +236,20 @@ class BaseDecorator:
             if element.is_a("IfcAnnotation"):
                 if element.ObjectType == self.objecttype:
                     results.append(obj)
+
                 elif (
                     self.objecttype == "MISC"
                     and element.ObjectType not in decoration_presets
                     and isinstance(obj.data, bpy.types.Mesh)
                 ):
                     results.append(obj)
+
+                elif self.objecttype == "FALL" and element.ObjectType in (
+                    "SLOPE_ANGLE",
+                    "SLOPE_FRACTION",
+                    "SLOPE_PERCENT",
+                ):
+                    results.append(obj)
         return results
 
     def get_path_geom(self, obj, topo=True):
@@ -857,6 +865,125 @@ class RadiusDecorator(BaseDecorator):
             self.draw_label(context, text, pos, dir, gap=0, center=False, vcenter=False)
 
 
+class FallDecorator(BaseDecorator):
+    """Decorating text with arrows
+    - head point with arrow
+    """
+
+    objecttype = "FALL"
+
+    DEF_GLSL = (
+        BaseDecorator.DEF_GLSL
+        + """
+        #define ARROW_ANGLE PI / 12.0
+        #define ARROW_SIZE 16.0
+    """
+    )
+
+    GEOM_GLSL = """
+    uniform vec2 winsize;
+    uniform float viewportDrawingScale;
+
+    layout(lines) in;
+    layout(line_strip, max_vertices=MAX_POINTS) out;
+    in uint type[];
+
+    void main() {
+        vec4 clip2win = matCLIP2WIN();
+        vec4 win2clip = matWIN2CLIP();
+
+        vec4 p0 = gl_in[0].gl_Position, p1 = gl_in[1].gl_Position;
+        uint t0 = type[0], t1 = type[1];
+
+        vec4 p0w = CLIP2WIN(p0), p1w = CLIP2WIN(p1);
+        vec4 edge = p1w - p0w, dir = normalize(edge);
+        vec4 gap1 = vec4(0);
+
+        vec4 p;
+
+        // end edge arrow for last segment
+        if (t1 == 2u) {
+            vec4 head[3];
+            arrow_head(dir, viewportDrawingScale * ARROW_SIZE, ARROW_ANGLE, head);
+
+            gl_Position = p1;
+            EmitVertex();
+            p = p1w - head[1];
+            gl_Position = WIN2CLIP(p);
+            EmitVertex();
+            p = p1w - head[2];
+            gl_Position = WIN2CLIP(p);
+            EmitVertex();
+            gl_Position = p1;
+            EmitVertex();
+            EndPrimitive();
+
+            gap1 = dir * viewportDrawingScale * ARROW_SIZE;
+        }
+
+        // stem, adjusted for and arrow
+        gl_Position = p0;
+        EmitVertex();
+        p = p1w - gap1;
+        gl_Position = WIN2CLIP(p);
+        EmitVertex();
+        EndPrimitive();
+    }
+    """
+
+    def decorate(self, context, obj):
+        verts, idxs, topo = self.get_path_geom(obj)
+        self.draw_lines(context, obj, verts, idxs, topo)
+        self.draw_labels(context, obj)
+
+    def draw_labels(self, context, obj):
+        region = context.region
+        region3d = context.region_data
+        dir = Vector((1, 0))
+        pos = location_3d_to_region_2d(region, region3d, self.get_spline_end(obj))
+
+        spline = obj.data.splines[0]
+        spline_points = spline.bezier_points if spline.bezier_points else spline.points
+
+        # generate label text
+        # same function as in svgwriter.py
+        def get_label_text():
+            element = tool.Ifc.get_entity(obj)
+            B, A = [v.co.xyz for v in spline_points[:2]]
+            rise = abs(A.z - B.z)
+            O = A.copy()
+            O.z = B.z
+            run = (B - O).length
+            if run != 0:
+                angle_tg = rise / run
+                angle = round(degrees(atan(angle_tg)))
+            else:
+                angle = 90
+
+            # ues SLOPE_ANGLE as default
+            if element.ObjectType in ("FALL", "SLOPE_ANGLE"):
+                return f"{angle}°"
+            elif element.ObjectType == "SLOPE_FRACTION":
+                if angle == 90:
+                    return "-"
+                return f"{self.format_value(context, rise)} / {self.format_value(context, run)}"
+            elif element.ObjectType == "SLOPE_PERCENT":
+                if angle == 90:
+                    return "-"
+                return f"{round(angle_tg * 100)} %"
+
+        if spline_points:
+            text = get_label_text()
+            self.draw_label(context, text, pos, dir, gap=0, center=False, vcenter=False)
+
+    def get_spline_end(self, obj):
+        spline = obj.data.splines[0]
+        spline_points = spline.bezier_points if spline.bezier_points else spline.points
+        if not spline_points:
+            return Vector((0, 0, 0))
+        return obj.matrix_world @ spline_points[0].co
+
+
 class StairDecorator(BaseDecorator):
     """Decorating stairs
     - head point with arrow
@@ -1444,7 +1571,7 @@ class BattingDecorator(BaseDecorator):
             verts, idxs = self.get_editmesh_geom(obj)
         else:
             verts, idxs = self.get_mesh_geom(obj)
-        
+
         # TODO: find the less ugly way to figure thickness
         thickness = DecoratorData.get_batting_thickness(obj)
         region = context.region
@@ -1461,9 +1588,8 @@ class BattingDecorator(BaseDecorator):
             obj,
             verts[:2],
             idxs,
-            extra_float_kwargs={
-                "batting_thickness_winspace": winspace_thickness},
-            is_scale_dependant = False
+            extra_float_kwargs={"batting_thickness_winspace": winspace_thickness},
+            is_scale_dependant=False,
         )
 
 
@@ -1924,6 +2050,7 @@ class DecorationsHandler:
         ElevationDecorator,
         TextDecorator,
         BattingDecorator,
+        FallDecorator,
     ]
 
     installed = None

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

@@ -31,7 +31,7 @@ import ifcopenshell.util.representation
 import blenderbim.tool as tool
 import blenderbim.bim.module.drawing.helper as helper
 import blenderbim.bim.module.drawing.annotation as annotation
-from math import pi, ceil
+from math import pi, ceil, atan, degrees
 from mathutils import Vector
 from mathutils import geometry
 from blenderbim.bim.ifc import IfcStore
@@ -162,6 +162,8 @@ class SvgWriter:
                 self.draw_section_level_annotation(obj)
             elif element.ObjectType == "TEXT":
                 self.draw_text_annotation(obj, obj.location)
+            elif element.ObjectType in ("FALL", "SLOPE_ANGLE", "SLOPE_FRACTION", "SLOPE_PERCENT"):
+                self.draw_fall_annotations(obj)
             else:
                 self.draw_misc_annotation(obj)
 
@@ -884,12 +886,86 @@ class SvgWriter:
                 "dominant-baseline": "middle",
             }
 
-            radius = ((matrix_world @ points[-1].co) - (matrix_world @ points[-2].co)).length
+            radius = (points[-1].co - points[-2].co).length
             radius = helper.format_distance(radius)
             tag = element.Description or f"R{radius}"
 
             self.svg.add(self.svg.text(tag, insert=tuple(text_position), class_="RADIUS", **text_style))
 
+    def draw_fall_annotations(self, obj):
+        x_offset = self.raw_width / 2
+        y_offset = self.raw_height / 2
+        classes = self.get_attribute_classes(obj)
+        element = tool.Ifc.get_entity(obj)
+        matrix_world = obj.matrix_world
+        for spline in obj.data.splines:
+            points = self.get_spline_points(spline)
+            projected_points = [self.project_point_onto_camera(matrix_world @ p.co.xyz) for p in points]
+            d = " ".join(
+                [
+                    "L {} {}".format((x_offset + p.x) * self.svg_scale, (y_offset - p.y) * self.svg_scale)
+                    for p in projected_points
+                ]
+            )
+            d = "M{}".format(d[1:])
+            path = self.svg.add(self.svg.path(d=d, class_=" ".join(classes)))
+
+            p0 = Vector(
+                (
+                    (x_offset + projected_points[0].x) * self.svg_scale,
+                    (y_offset - projected_points[0].y) * self.svg_scale,
+                )
+            )
+            p1 = Vector(
+                (
+                    (x_offset + projected_points[1].x) * self.svg_scale,
+                    (y_offset - projected_points[1].y) * self.svg_scale,
+                )
+            )
+
+            # generate label text
+            # same function as in decoration.py
+            def get_label_text():
+                B, A = [v.co.xyz for v in points[:2]]
+                rise = abs(A.z - B.z)
+                O = A.copy()
+                O.z = B.z
+                run = (B - O).length
+                if run != 0:
+                    angle_tg = rise / run
+                    angle = round( degrees( atan(angle_tg) ))
+                else:
+                    angle = 90
+
+                # ues SLOPE_ANGLE as default
+                if element.ObjectType in ("FALL", "SLOPE_ANGLE"):
+                    return f"{angle}°"
+                elif element.ObjectType == "SLOPE_FRACTION":
+                    if angle == 90:
+                        return "-"
+                    return f"{helper.format_distance(rise)} / {helper.format_distance(run)}"
+                elif element.ObjectType == "SLOPE_PERCENT":
+                    if angle == 90:
+                        return "-"
+                    return f"{round(angle_tg * 100)} %"
+
+            tag = element.Description or get_label_text()
+
+            text_offset = (p0 - p1).xy.normalized() * len(tag)
+            text_position = projected_points[0]
+            text_position = Vector(
+                ((x_offset + text_position.x) * self.svg_scale, (y_offset - text_position.y) * self.svg_scale)
+            )
+            text_position += text_offset
+
+            text_style = {
+                "text-anchor": "middle",
+                "alignment-baseline": "middle",
+                "dominant-baseline": "middle",
+            }
+
+            self.svg.add(self.svg.text(tag, insert=tuple(text_position), class_="RADIUS", **text_style))
+
     def draw_diameter_annotations(self, obj):
         classes = self.get_attribute_classes(obj)
         matrix_world = obj.matrix_world

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

@@ -425,6 +425,11 @@ class BIM_PT_annotation_utilities(Panel):
         op = row.operator("bim.add_annotation", text="Fill Area", icon="NODE_TEXTURE")
         op.object_type = "FILL_AREA"
 
+        row = layout.row(align=True)
+        op = row.operator("bim.add_annotation", text="Fall", icon="SORT_ASC")
+        op.object_type = "FALL"
+        op.data_type = "curve"
+
         row = layout.row(align=True)
         row.prop(self.props, "should_draw_decorations", text="Viewport Annotations")
         row.enabled = context.scene.camera is not None

src/blenderbim/blenderbim/bim/module/model/slab.py

@@ -612,7 +612,6 @@ class EnableEditingExtrusionProfile(bpy.types.Operator, tool.Ifc.Operator):
 
         bpy.ops.object.mode_set(mode="EDIT")
         ProfileDecorator.install(context)
-        # TODO: test it from properties panel?
         if not bpy.app.background:
             bpy.ops.wm.tool_set_by_id(tool.Blender.get_viewport_context(), name="bim.cad_tool")
         return {"FINISHED"}

src/blenderbim/blenderbim/tool/drawing.py

@@ -53,6 +53,7 @@ class Drawing(blenderbim.core.tool.Drawing):
             "BREAKLINE": "mesh",
             "DIAMETER": "curve",
             "DIMENSION": "curve",
+            "FALL": "curve",
             "FILL_AREA": "mesh",
             "HIDDEN_LINE": "mesh",
             "LINEWORK": "mesh",