I have a problem (small probability that it’s Rhino bug).
I have function for export geometry.
f3dm = Rhino.FileIO.File3dm.Read(RhinoDocument.Path);
foreach (Rhino.FileIO.File3dmObject o in f3dm.Objects)
{
ExportedObject exportedObject = new ExportedObject();
List<ExportedMesh> eM = new List<ExportedMesh>();
exportedObject.Meshes = eM;
//specify if object is solid or passable (door, window).
SetObjectType(o, exportedObject);
switch (o.Geometry.ObjectType)
{
case Rhino.DocObjects.ObjectType.Brep:
Rhino.Geometry.Brep brep = o.Geometry as Rhino.Geometry.Brep;
if (brep != null)
foreach (Rhino.Geometry.BrepFace bf in brep.Faces)
AddMeshToExportedObject((bf.GetMesh(Rhino.Geometry.MeshType.Any)), o.Attributes.MaterialIndex, o.Attributes.LayerIndex, exportedObject);
break;
case Rhino.DocObjects.ObjectType.Mesh:
Rhino.Geometry.Mesh mesh = o.Geometry as Rhino.Geometry.Mesh;
AddMeshToExportedObject(mesh, o.Attributes.MaterialIndex, o.Attributes.LayerIndex, exportedObject);
break;
case Rhino.DocObjects.ObjectType.Extrusion:
Rhino.Geometry.Extrusion extr = o.Geometry as Rhino.Geometry.Extrusion;
if (extr != null)
AddMeshToExportedObject(extr.GetMesh(Rhino.Geometry.MeshType.Any), o.Attributes.MaterialIndex, o.Attributes.LayerIndex, exportedObject);
break;
case Rhino.DocObjects.ObjectType.Surface:
Rhino.Geometry.Surface srf = o.Geometry as Rhino.Geometry.Surface;
if (srf != null && srf.ToBrep() != null)
foreach (Rhino.Geometry.BrepFace bf in srf.ToBrep().Faces)
AddMeshToExportedObject(bf.GetMesh(Rhino.Geometry.MeshType.Any), o.Attributes.MaterialIndex, o.Attributes.LayerIndex, exportedObject);
break;
default:
//Debug.Log("Can't open " + o.Geometry.ObjectType.ToString() + " geometry type");
break;
It works good, but sometimes next lines in different cases begin to return null.`
extr.GetMesh(Rhino.Geometry.MeshType.Any)
What concretely i did:
Open Rhino
Create new document
Make new extrusion with this tool
Click “export geometry” (start code above)
Verify that GetMesh returns null.
Properties say that extrusion is ok. Nothing wrong with it.
and
Open Rhino
Open existing model
Click export geometry
Verify that GetMesh DOESN’T return Null
Add extrusion
Click export geometry again
Verify that GetMesh of all objects of model returns null.
Looks like adding extrusion “broke” model. Because after deleting the extrusion, export geometry (for all objects) still returns null. After reopening model problem stayed.
I did some magic (that doesn’t apply logically); changed render mode. and after this sometimes GetMesh return NOT NULL in place where before changing render mode returned null. But it doesn’t always work and I can’t consider it as a fix.
Render meshes for Breps and Extrusions are created when needed. Thus, if you never shade your model, then render meshes won’t be created and, thus, won’t be saved in the 3DM file.
I tried to change Viewport displayMode and display mode of object
private void ObjectsDisplayMode(File3dmObject rO)
{
Guid viewportId = RhinoDocument.Views.ActiveView.ActiveViewportID;
ObjectAttributes attr = rO.Attributes;
var previouseDisplayMode = RhinoDocument.Views.ActiveView.ActiveViewport.DisplayMode;
var dm = RhinoDocument.Views.ActiveView.ActiveViewport;
if (attr.HasDisplayModeOverride(viewportId))
{
attr.RemoveDisplayModeOverride(viewportId);
}
else
{
Rhino.Display.DisplayModeDescription[] modes = Rhino.Display.DisplayModeDescription.GetDisplayModes();
Rhino.Display.DisplayModeDescription mode = null;
for (int i = 0; i < modes.Count(); i++)
{
if (String.Equals(modes[i].LocalName, "Shaded"))
{
mode = modes[i];
}
}
dm.DisplayMode = mode;
if (mode != null)
attr.SetDisplayModeOverride(mode, viewportId);
}
RhinoDocument.Objects.ModifyAttributes(rO.Attributes.ObjectId, attr, false);
RhinoDocument.Views.Redraw();
}
but it didn’t help.
But if I change display mode in Rhino by hands - it work correctly sometimes (not always).
I feel that you are right, but don’t understand what I did wrong??..
I dont know how it works but I think it starts creating the meshes when they are drawn. Try adding: RhinoDocument.Views.Redraw(); after dm.DisplayMode = mode; Does this work?
P.S. Does
if (String.Equals(modes[i].LocalName, "Shaded"))
{
mode = modes[i];
}
Protected Overrides Function RunCommand(ByVal doc As RhinoDoc, ByVal mode As RunMode) As Result
Dim Modes As Rhino.Display.DisplayModeDescription() = Rhino.Display.DisplayModeDescription.GetDisplayModes()
Dim DispMode As Rhino.Display.DisplayModeDescription = Nothing
For Each m In Modes
If m.EnglishName = "Shaded" Then
DispMode = m
End If
Next
If DispMode Is Nothing Then
Return Result.Cancel
End If
RhinoDoc.ActiveDoc.Views.ActiveView.ActiveViewport.DisplayMode = DispMode
RhinoDoc.ActiveDoc.Views.ActiveView.Redraw()
Dim obj As New List(Of Guid)
For Each Sel As Rhino.DocObjects.RhinoObject In RhinoDoc.ActiveDoc.Objects.GetSelectedObjects(False, False)
obj.Add(Sel.Id)
Next
Dim mList As New List(Of Geometry.Mesh)
For Each o In obj
Dim objRef As New DocObjects.ObjRef(o)
Dim br As Geometry.Brep = objRef.Brep
For Each f In br.Faces
Dim m As Geometry.Mesh = f.GetMesh(MeshType.Any)
mList.Add(m)
doc.Objects.AddMesh(m)
Next
Next
MsgBox(mList.Count)
Return Result.Success
End Function
I tested this on a cube
If I run the first time doc.Objects.AddMesh(m) does nothing, BUT mList contains 6 meshes.
When I run the 2nd time (then Im already in shaded mode) 6 meshes are added and the list contains 6 meshes.
I tried delete object, than change viewport, than add object.
private void ObjectsDisplayMode(File3dmObject rO)
{
var dm = RhinoDocument.Views.ActiveView.ActiveViewport;
var r = rO;
RhinoDocument.Objects.Delete(rO.Attributes.ObjectId,false);
Extrusion e = r.Geometry as Rhino.Geometry.Extrusion; //in this example this is extrusion 100%
if (attr.HasDisplayModeOverride(viewportId))
{
attr.RemoveDisplayModeOverride(viewportId);
}
else
{
Rhino.Display.DisplayModeDescription[] modes = Rhino.Display.DisplayModeDescription.GetDisplayModes();
Rhino.Display.DisplayModeDescription mode = null;
for (int i = 0; i < modes.Count(); i++)
{
if (String.Equals(modes[i].LocalName, "Shaded"))
{
mode = modes[i];
}
}
dm.DisplayMode = mode;
RhinoDocument.Views.Redraw();
RhinoDocument.Objects.Add(e);
RhinoDocument.Views.Redraw();
}
Oke the first time there are still no meshes xD Didnt check if Dim m As Geometry.Mesh = f.GetMesh(MeshType.Any) was succesfull but the first time I try there are still no meshes…
OK, my comment about shading the model was really meant for end users. Since you are working in a plug-in in Rhino, you can problematically generate render meshes by calling RhinoObject.CreateMeshes. Here is an example.
As long as you redraw and wait 