Softimage: A Self-Contained CurveLength Operator

Sometimes you need to know the length of a curve for some setups; for a while I sometimes used an addon called jsCurveLength.

However, the way it’s designed relies on the existance of the addon to evaluate. Without it, your rig is broken. I’ve made a version which is self-contained, so when you export your rig you don’t need to tell people to install any addon.

Select your curve(s) and run this code from either a button or the Script Editor. Here’s the JavaScript:

// Self-Contained CurveLength Op -- http://darkvertex.com/

function CurveLengthOp_Update( In_UpdateContext, Out, Incrvlist ) {
	Out.Value = Incrvlist.Value.Geometry.Curves(0).Length;
	return true;
}

function ApplyCurveLengthProp() {
	oEnum = new Enumerator( Application.Selection ) ;
	for (;!oEnum.atEnd();oEnum.moveNext() )
	{
		var sel = oEnum.item();
		if (sel.Type == "crvlist") {
			var oProp = sel.AddProperty( "Custom_parameter_list", false, "CurveLength" );
			var p = oProp.AddParameter2("CurveLength",siDouble,0,-8000,8000,-8000,8000,siClassifUnknown,siPersistable | siAnimatable, "Length");
			var crvList = sel.ActivePrimitive;
			var newOp = AddScriptedOp( p, CurveLengthOp_Update.toString(), crvList, "CurveLengthOp", "JScript" );
			
			newOp.Debug = 0;
			newOp.AlwaysEvaluate = true;
			newOp.Connect();
			
			LogMessage("Added CurveLengthOp to: "+sel.FullName, siVerbose);
		}
	}
}

ApplyCurveLengthProp();