Aha! Setting DataArray2D with JScript


It came to me this morning while I was lying in the dentist chair.
I almost had it last Thursday.
Hat tip: Ho Chung

//var o = Selection(0)
//var oICEAttrMats = o.ActivePrimitive.AddICEAttribute("MyString", siICENodeDataString, siICENodeStructureArray, siICENodeContextSingleton);


var o = Selection(0);
var a = o.ActivePrimitive.ICEAttributes("MyString");


sa = getSafeArray( [ "a", "b", "c" ] );
//jsa = new VBArray( sa ).toArray();

sa1 = getSafeArray( [sa] );

a.DataArray2D = sa1;

//
// Get a safearray from a JScript array
//
function getSafeArray(jsArr) {
    var dict = new ActiveXObject("Scripting.Dictionary");
    for (var i = 0; i < jsArr.length; i++)
    dict.add(i, jsArr[i]);
    return dict.Items();
}

Trying and failing to set DataArray2D with JScript


First, let’s use Python to set up two ICE attributes with DataArray2D.

si = Application
from win32com.client import constants as C            # win32com.client.constants

oObj = si.Selection(0)
a = oObj.ActivePrimitive.AddICEAttribute("MyString", C.siICENodeDataString, C.siICENodeStructureArray, C.siICENodeContextSingleton)
a.DataArray2D = [["a", "b", "c", "d", "e"]]

a1 = oObj.ActivePrimitive.AddICEAttribute("MyString2", C.siICENodeDataString, C.siICENodeStructureArray, C.siICENodeContextSingleton)
a1.DataArray2D = [["u", "v", "w" ]]

Now, let’s try to set DataArray2D with JScript. As a reminder, here’s how you access the DataArray2D in JScript:

o = Selection(0);
a = o.ActivePrimitive.ICEAttributes("MyString");
x = VBArray( a.DataArray2D ).toArray();
LogMessage( VBArray( x[0] ).toArray() );
// INFO : a,b,c,d,e

Seeing that, you would think that you could set DataArray2D using an array of arrays or maybe an array, but no:

a.DataArray2D =  [[ "a", "b", "c" ]];
// WARNING : 3390 - This ICEAttribute doesn't refer to a 2D array: <Attribute: MyString2>
// 

a.DataArray2D =  [ "a", "b", "c" ];
// WARNING : 3392 - Invalid offset specified while extracting data from this attribute: <Attribute: MyString2>
// <Offset: 110348408>
// 

At this point, I started wondering if there was anyway at all to do it, so I tried to put back the same value:

a.DataArray2D = a.DataArray2D;
// WARNING : 3393 - The input array doesn't match this attribute's data type or structure type: <Attribute: MyString2>
// 

Ack. Maybe if I converted it to a JScript array…well, at least something finally worked:

a.DataArray2D = VBArray( a.DataArray2D ).toArray();

Copying the DataArray2D from another attribute works too:

a = o.ActivePrimitive.ICEAttributes("MyString");
a1 = o.ActivePrimitive.ICEAttributes("MyString2");
a.DataArray2D = VBArray( a1.DataArray2D ).toArray();

So, based on that, I thought maybe I needed a safearray and things started getting a little hacky:

sa = getSafeArray( [ "a", "b", "c" ] );
jsa = new VBArray( sa ).toArray();

a.DataArray2D = sa;
// WARNING : 3392 - Invalid offset specified while extracting data from this attribute: <Attribute: MyString2>
// <Offset: 110348408>

a.DataArray2D = jsa;
// WARNING : 3392 - Invalid offset specified while extracting data from this attribute: <Attribute: MyString2>
// <Offset: 110348408>

//
// Get a safearray from a JScript array
//
function getSafeArray(jsArr) {
    var dict = new ActiveXObject("Scripting.Dictionary");
    for (var i = 0; i < jsArr.length; i++)
    dict.add(i, jsArr[i]);
    return dict.Items();
}

In summary, it doesn’t seem possible to set DataArray2D from JScript.

Setting the DataArray2D attribute in scripting


Last time I tried this, I gave up on JScript (it seemed impossible) and got something to work in Python.

In JScript, I kept getting errors like “# WARNING : 3392 – Invalid offset specified while extracting data from this attributeƈ.

si = Application
from win32com.client import constants as C            # win32com.client.constants

oObj = si.Selection(0)
oICEAttrMats = oObj.ActivePrimitive.AddICEAttribute("MyString", C.siICENodeDataString, C.siICENodeStructureArray, C.siICENodeContextSingleton)
oICEAttrMats.DataArray2D = [["a", "b", "c", "d"]]

x = oICEAttrMats.DataArray2D
print x
print len(x)
print len(x[0])
print len(x[0][0])

for d in x[0][0]:
    print d


# (((u'a', u'b', u'c', u'd'),),)
# 1
# 1
# 4
# a
# b
# c
# d

See also this Getting DataArray2D attribute values post.

Saturday Snippet: Getting data from a DataArray2D ICE attribute


I wanted to do this JScript, but I had to do it in Python first, to establish that it was actually possible (with JScript, you’ve got to mess around with VBarrays and such).

# Using one of the CrowdFX sample scenes:
Application.SelectObj("Pedestrian_Mesh.Actor_Copies", None, None);
o = Application.Selection(0)

a = o.ActivePrimitive.Geometry.GetICEAttributeFromName("Materials")
print len(a.DataArray2D)
print len(a.DataArray2D[0] )
print a.DataArray2D[0][0]
for s in a.DataArray2D[0][0]:
    print s

# 1
# 1
# (u'', u'Sources.Materials.PedestrianLib.Shoes', u'Sources.Materials.PedestrianLib.Hair', u'Sources.Materials.PedestrianLib.Legs', u'Sources.Materials.PedestrianLib.Skin', u'Sources.Materials.PedestrianLib.Shirt')
# Sources.Materials.PedestrianLib.Shoes
# Sources.Materials.PedestrianLib.Hair
# Sources.Materials.PedestrianLib.Legs
# Sources.Materials.PedestrianLib.Skin
# Sources.Materials.PedestrianLib.Shirt

After I had it working in Python, I was able to figure it out in JScript:

// Using one of the CrowdFX sample scenes:
SelectObj("Pedestrian_Mesh.Actor_Copies", null, null);
o = Selection(0);

a = o.ActivePrimitive.Geometry.GetICEAttributeFromName("Materials");

x = new VBArray( a.DataArray2D ).toArray();
y = new VBArray( x[0] ).toArray();
for ( var i = 0; i < y.length; i++ )
{
    LogMessage( y[i] );
}