I have a with Transformation. I need to transform a selected object continuously in a loop as seen in the attached code. I am running the loop for 18 times and in each loop I am rotating the selected object by 10 degree around z axis ( 0,0,1). But even after doing lots of attempt in different permutation combination, I see only one transformation of 10 degree ( don’t know the first or the last ) where as I expect the selected object to be finally rotated by 180 degree when the loop ends.
What might be issue ?
The code is as below.
public class TransFormTest : Command
{
…
protected override Result RunCommand(RhinoDoc doc, RunMode mode)
{
Rhino.DocObjects.ObjRef rhobj1;
var rc1 = RhinoGet.GetOneObject("Select Link One", true, Rhino.DocObjects.ObjectType.InstanceReference, out rhobj1);
if (rc1 != Rhino.Commands.Result.Success)
return rc1;
currentTransform = Transform.Identity;
for(int i = 1; i <= 18; i++)
{
TransformBrep(ref doc, rhobj1);
//Thread.Sleep(100);
}
return Result.Success;
}
public Rhino.Commands.Result TransformBrep(ref Rhino.RhinoDoc doc, Rhino.DocObjects.ObjRef rhobj1)
{
double deg = 10.0;
double rad = (22.0 / 7.0) / 180.0 * deg;
Point3d cen = new Point3d(0,0,0);
Transform xform = Rhino.Geometry.Transform.Rotation(rad, cen);
currentTransform = currentTransform * xform ;
//currentTransform = xform * currentTransform; // tried both
doc.Objects.Transform(rhobj1, currentTransform, true);
doc.Views.Redraw();
return Rhino.Commands.Result.Success;
}
Transform currentTransform;
}
I dont know exactly but can you try to add:
RhinoApp.wait() before the Redraw?
Just tested this quickly
For Each selObj In doc.Objects.GetSelectedObjects(False, False)
Dim obj As New ObjRef(selObj.Id)
Dim g As Guid = obj.ObjectId
Dim br As Brep = obj.Brep
For i = 0 To 18 - 1
br.Translate(10, 0, 0)
doc.Objects.Replace(g, br)
RhinoApp.Wait()
doc.Views.Redraw()
Next
Next
and this seems to work.
I found somewhere that probably I need to call doc.Objects.Replace.
I have actually imported step files and the geometries I have are Inserts ( Block Reference/Instances ).
But no overload of Replace takes Insert as 2nd parameter.
By the way, I have already tested RhinoApp.wait(). But no good.
Can you check if the Guid of the objects change after the oc.Objects.Transform(rhobj1, currentTransform, true);?
Maybe you lose your reference while you do this…
Seems I have the same id after transformation.
Oke I found it.
This works:
For Each selObj In doc.Objects.GetSelectedObjects(False, False)
Dim obj As New ObjRef(selObj.Id)
Dim g As Guid = obj.ObjectId
Dim br As Brep = obj.Brep
For i = 0 To 18 - 1
Dim xform As Transform = Rhino.Geometry.Transform.Translation(10, 0, 0)
doc.Objects.Transform(g, xform, True)
RhinoApp.Wait()
doc.Views.Redraw()
Next
Next
Thid doesn’t
For Each selObj In doc.Objects.GetSelectedObjects(False, False)
Dim obj As New ObjRef(selObj.Id)
Dim g As Guid = obj.ObjectId
Dim br As Brep = obj.Brep
For i = 0 To 18 - 1
Dim xform As Transform = Rhino.Geometry.Transform.Translation(10, 0, 0)
doc.Objects.Transform(selObj, xform, True)
RhinoApp.Wait()
doc.Views.Redraw()
Next
Next
Difference?
doc.Objects.Transform(g, xform, True)
doc.Objects.Transform(selObj, xform, True)
After the first transform the reference to selObj/rhobj1 is gone! Use the guid instead and you are ready to go.
I am able to make my block instance to mesh.
Hope now I can go ahead.
But could you give me the c# equivalent of the line below
Dim obj As New ObjRef(selObj.Id)
1 Like
So your “animation” works?
I think something like this:
ObjRef obj = new ObjRef(selObj.Id);
Yes, now its working perfectly.
Final working code is as below.
protected override Result RunCommand(RhinoDoc doc, RunMode mode)
{
Rhino.DocObjects.ObjRef rhobj1;
var rc1 = RhinoGet.GetOneObject("Select Link 1", true, Rhino.DocObjects.ObjectType.Mesh, out rhobj1);
if (rc1 != Rhino.Commands.Result.Success)
return rc1;
for (int i = 1; i <= 90; i++)
{
TransformBrep(ref doc, rhobj1);
}
return Result.Success;
}
public Rhino.Commands.Result TransformBrep(ref Rhino.RhinoDoc doc, Rhino.DocObjects.ObjRef rhobj1)
{
double deg = 1.0;
double rad = (22.0 / 7.0) / 180.0 * deg;
Point3d cen = new Point3d(0,0,0);
Transform xform = Rhino.Geometry.Transform.Rotation(rad, cen);
Guid g = rhobj1.ObjectId;
Guid guid = doc.Objects.Transform(g, xform, true);
doc.Views.Redraw();
return Rhino.Commands.Result.Success;
}
But I have another problem.
I had selected one object. Now I want to select two objects as below.
var rc1 = RhinoGet.GetOneObject("Select Link 1", true, Rhino.DocObjects.ObjectType.Mesh, out rhobj1);
if (rc1 != Rhino.Commands.Result.Success)
return rc1;
var rc2 = RhinoGet.GetOneObject("Select Link 2", true, Rhino.DocObjects.ObjectType.Mesh, out rhobj1);
if (rc2 != Rhino.Commands.Result.Success)
return rc2;
Strangely its not selecting the 2nd object.
I tried to debug but it just skips those lines.
Any idea ?
Rhino.DocObjects.ObjRef rhobj1;
var rc1 = RhinoGet.GetOneObject("Select Link 1", true, Rhino.DocObjects.ObjectType.Mesh, out rhobj1);
if (rc1 != Rhino.Commands.Result.Success)
return rc1;
Rhino.DocObjects.ObjRef rhobj2;
var rc2 = RhinoGet.GetOneObject("Select Link 2", true, Rhino.DocObjects.ObjectType.Mesh, out rhobj2);
if (rc2 != Rhino.Commands.Result.Success)
return rc2;
Does not work either.
Just the 2nd selection is skipped. Why ?
Because for the 2nd object select you got an object preselected (the 1st object one).
Place doc.objects.unselectall() in between.
