Refinement of various scene functions

CHANGELOG.md

@@ -9,11 +9,25 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+* Added `compas.scene.Scene.redraw`.
+* Added `compas.scene.Scene.context_objects` representing all objects drawn in the visualisation context by the scene.
+* Added `compas.scene.Scene.clear_context` with optional `guids` to clear some or all objects from the visualisation context.
+* Added `clear_scene` and `clear_context` parameters to `compas.scene.Scene.clear` to differentiate between removing objects from the scene internally or removing corresponding objects from the viz context, or both (default).
+* Added `compas_rhino.conversions.extrusion_to_compas_box` as direct conversion of extrusion breps.
+
 ### Changed
 
 * Changed the `__str__` of `compas.geometry.Frame`, `compas.geometry.Plane`, `compas.geometry.Polygon`, `compas.geometry.Polyhedron`, `compas.geometry.Quaternion` to use a limited number of decimals (determined by `Tolerance.PRECISION`). Note: `__repr__` will instead maintain full precision.
 * Changed the `__str__` of `compas.geometry.Pointcloud` to print total number of points instead of the long list of points. Note: `__repr__` will still print all the points with full precision.
 * Fixed bug in `Pointcloud.from_box()`.
+* Changed `compas.scene.MeshObject` to not use vertex coordinate caching because it is too fragile.
+* Changed `compas_rhino.scene.RhinoMeshObject` to keep track of element-guid pairs in dicts.
+* Changed `compas.scene.Scene._guids` to a default value of `[]`.
+* Fixed bug due to missing import in `compas_rhino.scene.graphobject`.
+* Changed `compas_rhino.scene.RhinoMeshObject.draw_vertexnormals` to use the same selection of vertices as `draw_vertices`.
+* Changed `compas_rhino.scene.RhinoMeshObject.draw_vertexnormals` to use the corresponding vertex color if no color is specified.
+* Changed `compas_rhino.scene.RhinoMeshObject.draw_facenormals` to use the same selection of vertices as `draw_faces`.
+* Changed `compas_rhino.scene.RhinoMeshObject.draw_facenormals` to use the corresponding face color if no color is specified.
 
 ### Removed
 

src/compas/scene/meshobject.py

@@ -5,7 +5,6 @@
 import compas.colors  # noqa: F401
 import compas.datastructures  # noqa: F401
 import compas.geometry  # noqa: F401
-from compas.geometry import transform_points
 
 from .descriptors.colordict import ColorDictAttribute
 from .sceneobject import SceneObject
@@ -71,7 +70,6 @@ def __init__(
     ):  # fmt: skip
         # type: (...) -> None
         super(MeshObject, self).__init__(**kwargs)  # type: ignore
-        self._vertex_xyz = None
         self.show_vertices = show_vertices
         self.show_edges = show_edges
         self.show_faces = show_faces
@@ -107,7 +105,6 @@ def mesh(self, mesh):
         # type: (compas.datastructures.Mesh) -> None
         self._item = mesh
         self._transformation = None
-        self._vertex_xyz = None
 
     @property
     def transformation(self):
@@ -117,24 +114,8 @@ def transformation(self):
     @transformation.setter
     def transformation(self, transformation):
         # type: (compas.geometry.Transformation) -> None
-        self._vertex_xyz = None
         self._transformation = transformation
 
-    @property
-    def vertex_xyz(self):
-        # type: () -> dict[int, list[float]]
-        if self.mesh:
-            if self._vertex_xyz is None:
-                points = self.mesh.vertices_attributes("xyz")
-                points = transform_points(points, self.worldtransformation)
-                self._vertex_xyz = dict(zip(self.mesh.vertices(), points))
-        return self._vertex_xyz  # type: ignore
-
-    @vertex_xyz.setter
-    def vertex_xyz(self, vertex_xyz):
-        # type: (dict[int, list[float]]) -> None
-        self._vertex_xyz = vertex_xyz
-
     def draw_vertices(self):
         """Draw the vertices of the mesh.
 

src/compas/scene/scene.py

@@ -76,6 +76,14 @@
         # type: () -> list[SceneObject]
         return [node for node in self.nodes if not node.is_root]  # type: ignore
 
+    @property
+    def context_objects(self):
+        # type: () -> list
+        guids = []
+        for obj in self.objects:
+            guids += obj.guids
+        return guids
+
     def add(self, item, parent=None, **kwargs):
         # type: (compas.geometry.Geometry | compas.datastructures.Datastructure, SceneObject | TreeNode | None, dict) -> SceneObject
         """Add an item to the scene.
@@ -108,32 +116,82 @@
         super(Scene, self).add(sceneobject, parent=parent)
         return sceneobject
 
-    def clear(self):
-        # type: () -> None
-        """Clear everything from the current context of the scene."""
+    def clear_context(self, guids=None):
+        # type: (list | None) -> None
+        """Clear the visualisation context.
+
+        Parameters
+        ----------
+        guids : list, optional
+            The identifiers of the objects in the visualisation context.
+
+        Returns
+        -------
+        None
+
+        Notes
+        -----
+        If `guids=None`, this will clear all objects from the visualisation context.
+        For example, when used in Rhino, it will remove everything from the Rhino model.
+        This is equivalent to `compas_rhino.clear()`.
+
+        If `guids` is a list, only those objects in the list will be removed.
+
+        The method is used by `Scene.clear` to remove all objects previously drawn by the scene,
+        without removing other model objects.
+
+        """
+        clear(guids)
+
+    def clear(self, clear_scene=True, clear_context=True):
+        # type: (bool, bool) -> None
+        """Clear the scene.
+
+        Parameters
+        ----------
+        clear_scene : bool, optional
+            If True, all scene objects will be removed from the scene tree.
+        clear_context : bool, optional
+            If True, all objects drawn by the scene in the visualisation context will be removed.
+
+        Returns
+        -------
+        None
 
-        clear()
+        Notes
+        -----
+        To redraw the scene, without modifying any of the other objects in the visualisation context:
 
-    def clear_objects(self):
-        # type: () -> None
-        """Clear all objects inside the scene."""
+        >>> scene.clear(clear_scene=False, clear_context=True)
+        >>> scene.draw()
 
+        """
         guids = []
+
         for sceneobject in self.objects:
             guids += sceneobject.guids
             sceneobject._guids = None
-        clear(guids=guids)
+
+            if clear_scene:
+                self.remove(sceneobject)
+
+        if clear_context:
+            self.clear_context(guids)
 
     def draw(self):
-        """Draw the scene."""
+        """Draw the scene.
+
+        This will just draw all scene objects in the scene tree,
+        without making any modifications to the visualisation context.
+        For example, it will not remove any of the previously drawn objects.
+
+        """
 
         if not self.context:
             raise ValueError("No context detected.")
 
         before_draw()
 
-        self.clear_objects()
-
         drawn_objects = []
         for sceneobject in self.objects:
             if sceneobject.show:
@@ -142,3 +200,14 @@
         after_draw(drawn_objects)
 
         return drawn_objects
+
+    def redraw(self):
+        """Redraw the scene.
+
+        This removes all previously drawn objects from the visualisation context,
+        before drawing all scene objects in the scene tree.
+
+        """
+
+        self.clear(clear_scene=False, clear_context=True)
+        self.draw()

src/compas/scene/sceneobject.py

@@ -111,7 +111,7 @@ def __init__(
         # which means that adding child objects will be added in context "None"
         self.context = context
         self._item = item
-        self._guids = None
+        self._guids = []
         self._node = None
         self._frame = frame
         self._transformation = transformation

src/compas_ghpython/scene/meshobject.py

@@ -50,45 +50,38 @@ def draw(self):
         self._guids = []
 
         if self.show_faces is True:
+
             vertexcolors = []
-            if len(self.vertexcolor):
-                vertexcolors = [self.vertexcolor[vertex] for vertex in self.mesh.vertices()]
+            if len(self.vertexcolor):  # type: ignore
+                vertexcolors = [self.vertexcolor[vertex] for vertex in self.mesh.vertices()]  # type: ignore
 
             facecolors = []
-            if len(self.facecolor):
-                facecolors = [self.facecolor[face] for face in self.mesh.faces()]
-
-            color = None
-            if not vertexcolors and not facecolors:
-                color = self.color
+            if len(self.facecolor):  # type: ignore
+                facecolors = [self.facecolor[face] for face in self.mesh.faces()]  # type: ignore
 
             vertex_index = self.mesh.vertex_index()
-            vertex_xyz = self.vertex_xyz
 
-            vertices = [vertex_xyz[vertex] for vertex in self.mesh.vertices()]
+            vertices = [self.mesh.vertex_attributes(vertex, "xyz") for vertex in self.mesh.vertices()]
             faces = [[vertex_index[vertex] for vertex in self.mesh.face_vertices(face)] for face in self.mesh.faces()]
 
             geometry = conversions.vertices_and_faces_to_rhino(
                 vertices,
                 faces,
-                color=color,
+                color=self.color,
                 vertexcolors=vertexcolors,
                 facecolors=facecolors,
                 disjoint=self.disjoint,
             )
 
-            # geometry.Transform(conversions.transformation_to_rhino(self.worldtransformation))
+            geometry.Transform(conversions.transformation_to_rhino(self.worldtransformation))
 
             self._guids.append(geometry)
 
         elif self.show_faces:
-            self._guids += self.draw_faces()
+            self.draw_faces()
 
-        if self.show_vertices:
-            self._guids += self.draw_vertices()
-
-        if self.show_edges:
-            self._guids += self.draw_edges()
+        self.draw_vertices()
+        self.draw_edges()
 
         return self.guids
 
@@ -104,9 +97,13 @@ def draw_vertices(self):
 
         vertices = list(self.mesh.vertices()) if self.show_vertices is True else self.show_vertices or []
 
+        transformation = conversions.transformation_to_rhino(self.worldtransformation)
+
         if vertices:
             for vertex in vertices:
-                points.append(conversions.point_to_rhino(self.vertex_xyz[vertex]))
+                geometry = conversions.point_to_rhino(self.mesh.vertex_attributes(vertex, "xyz"))
+                geometry.Transform(transformation)
+                points.append(geometry)
 
         return points
 
@@ -122,9 +119,14 @@ def draw_edges(self):
 
         edges = list(self.mesh.edges()) if self.show_edges is True else self.show_edges or []
 
+        transformation = conversions.transformation_to_rhino(self.worldtransformation)
+
         if edges:
             for edge in edges:
-                lines.append(conversions.line_to_rhino((self.vertex_xyz[edge[0]], self.vertex_xyz[edge[1]])))
+                line = self.mesh.edge_line(edge)
+                geometry = conversions.line_to_rhino(line)
+                geometry.Transform(transformation)
+                lines.append(geometry)
 
         return lines
 
@@ -140,12 +142,17 @@ def draw_faces(self):
 
         faces = list(self.mesh.faces()) if self.show_faces is True else self.show_faces or []
 
+        transformation = conversions.transformation_to_rhino(self.worldtransformation)
+
         if faces:
             for face in faces:
-                color = self.facecolor[face]
-                vertices = [self.vertex_xyz[vertex] for vertex in self.mesh.face_vertices(face)]
+                color = self.facecolor[face]  # type: ignore
+                vertices = [self.mesh.vertex_attributes(vertex, "xyz") for vertex in self.mesh.face_vertices(face)]  # type: ignore
                 facet = ngon(len(vertices))
+
                 if facet:
-                    meshes.append(conversions.vertices_and_faces_to_rhino(vertices, [facet], color=color))
+                    geometry = conversions.vertices_and_faces_to_rhino(vertices, [facet], color=color)
+                    geometry.Transform(transformation)
+                    meshes.append(geometry)
 
         return meshes

src/compas_rhino/conversions/breps.py

@@ -12,6 +12,7 @@
 from compas.tolerance import TOL
 
 from .exceptions import ConversionError
+from .extrusions import extrusion_to_compas_box
 from .geometry import point_to_compas
 from .shapes import cone_to_compas
 from .shapes import cylinder_to_compas
@@ -82,7 +83,7 @@ def brep_to_compas_box(brep):
     :class:`compas.geometry.Box`
 
     """
-    raise NotImplementedError
+    return extrusion_to_compas_box(brep.Geometry)
 
 
 def brep_to_compas_cone(brep):

src/compas_rhino/conversions/meshes.py

@@ -231,7 +231,7 @@ def face_callback(face):
 
 
 def mesh_to_compas(rhinomesh, cls=None):
-    """Convert a Rhino mesh object to a COMPAS mesh.
+    """Convert a Rhino mesh to a COMPAS mesh.
 
     Parameters
     ----------

src/compas_rhino/scene/graphobject.py

@@ -6,6 +6,7 @@
 import scriptcontext as sc  # type: ignore
 
 import compas_rhino
+import compas_rhino.objects
 from compas.geometry import Line
 from compas.scene import GraphObject
 from compas_rhino.conversions import line_to_rhino