about Write layer script in python

Hello everybody

I am whiting code in python according C# version:

Rhino.DocObjects.Tables.LayerTable layers = doc.Layers;
int index = layers.Find("AngleDimention1", false);
if(index == -1){
Rhino.DocObjects.Layer layer = new Rhino.DocObjects.Layer();
layer.Default();
layer.Color = Color.FromArgb(230, 230, 20);
layer.Name = "AngleDimention1";
layers.Add(layer);
index = layers.Find("AngleDimention1", false);

But There is something wrong in first line：

layers=Rhino.RhinoDoc.ActiveDoc.Layers()
index=layers.Find("aaa",false)
if index==-1:
layer=Rhino.DocObjects.Layer()
layer.Default()
layers.Add(layer)
index=Find("aaa", false)

Runtime error (ArgumentTypeException): LayerTable is not callable
Traceback:
line 6, in script

somebody can help me？Thank you very much！

Replies to This Discussion

Permalink Reply by Anders Holden Deleuran on September 6, 2012 at 3:21am

Try to remove the parentheses:

layers = Rhino.RhinoDoc.ActiveDoc.Layers

Permalink Reply by zhouningyi on September 6, 2012 at 4:00am

Thank you very much，done it

Permalink Reply by zhouningyi on September 6, 2012 at 4:39am

and Another question：

Here is a code in Rhino.common,But does't work in GH:

import Rhino
import scriptcontext
import System.Drawing.Color

def AddChildLayer():
# Get an existing layer
default_name = scriptcontext.doc.Layers.CurrentLayer.Name
# Prompt the user to enter a layer name
gs = Rhino.Input.Custom.GetString()
gs.SetCommandPrompt("Name of existing layer")
gs.SetDefaultString(default_name)
gs.AcceptNothing(True)
gs.Get()
if gs.CommandResult()!=Rhino.Commands.Result.Success:
return gs.CommandResult()

# Was a layer named entered?
layer_name = gs.StringResult().Trim()
index = scriptcontext.doc.Layers.Find(layer_name, True)
if index<0: return Rhino.Commands.Result.Cancel

parent_layer = scriptcontext.doc.Layers[index]

# Create a child layer
child_name = parent_layer.Name + "_child"
childlayer = Rhino.DocObjects.Layer()
childlayer.ParentLayerId = parent_layer.Id
childlayer.Name = child_name
childlayer.Color = System.Drawing.Color.Red

index = scriptcontext.doc.Layers.Add(childlayer)
if index<0:
print "Unable to add", child_name, "layer."
return Rhino.Commands.Result.Failure
return Rhino.Commands.Result.Success

if __name__=="__main__":
AddChildLayer()

Permalink Reply by Anders Holden Deleuran on September 6, 2012 at 7:08am

There's a quite a few things to be aware of when using Python in GH versus in Rhino. For your script this is mainly that you are calling methods which aren't used/supported by GH! This being all the # Prompt the user to enter a layer name stuff. In GH you could instead reference the name of a layer by feeding a string into the Python component and use the name of this variable in the script. Secondly, when you wan't to create the layers in Rhino you have to manually change the scriptcontext from the GH document to the Rhino document, see Guilios reply in this thread: http://www.grasshopper3d.com/forum/topics/selecting-geometry-proble....

Permalink Reply by zhouningyi on September 10, 2012 at 12:24am

Thank you very much！It is very helpful

Permalink Reply by Anders Holden Deleuran on September 10, 2012 at 3:04am

No worries. Come to think of it you might actually want to check out the RhinoScriptSyntax functions for doing this kind of stuff. Should make it a bit easier than using RhinoCommon if your just starting out with Rhino.Python: http://www.rhino3d.com/5/ironpython/modules/layer_module.htm

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