Hi Karsten,

thanks anyway and, if you want, take a look at my "Circles" and "GetBBoxes" nodes
that i posted some minutes ago.

Ciao!

Marco.

P.S.

How funny can be playing with nodes !!

Here's my other 3 nodes that follow the same rules of my "Circles" and "GetBBoxes" :

// Cones
function Cones()
{
	this.addInput("Center","pointarray");
	this.addInput("Radius","number");
	this.addInput("Height","number");
	this.addInput("Elements","number");
	this.addInput("Step","number");	
	this.addOutput("Out","objectlist");
	this.properties = { radius:1, height:1, elements:1, step:1 };
}

Cones.title = "Cones";
Cones.desc = "Cones";

Cones.prototype.onExecute = function()
{
	var output = moi.geometryDatabase.createObjectList();
	var centers = this.getInputData(0, new pointArray());
	this.properties.radius = this.getInputData(1, this.properties.radius);
	this.properties.height = this.getInputData(2, this.properties.height);
	var len = centers.getLength();
	this.properties.elements = this.getInputData(3, this.properties.elements);
	if ((this.properties.elements <= 0) || (this.properties.elements > len)) this.properties.elements = len;
	this.properties.step = this.getInputData(4, this.properties.step);
	if (this.properties.step <= 0) this.properties.step = 1;
	if (this.properties.step > len) this.properties.step = len;
	
	for (i = 0; i < len && i < this.properties.elements; i += this.properties.step) {
		var frame = centers.getFrame(i);
		var cone = factory('cone', true, frame, null, this.properties.radius, frame.evaluate(0,0,this.properties.height));
		output.addObject(cone.item(0));
	}
	
	this.setOutputData(0, output);
	
}

LiteGraph.registerNodeType("Solids/Cones", Cones);

// Cylinders
function Cylinders()
{
	this.addInput("Center","pointarray");
	this.addInput("Radius","number");
	this.addInput("Height","number");
	this.addInput("Elements","number");
	this.addInput("Step","number");	
	this.addOutput("Out","objectlist");
	this.properties = { radius:1, height:1, elements:1, step:1 };
}

Cylinders.title = "Cylinders";
Cylinders.desc = "Cylinders";

Cylinders.prototype.onExecute = function()
{
	var output = moi.geometryDatabase.createObjectList();
	var centers = this.getInputData(0, new pointArray());
	this.properties.radius = this.getInputData(1, this.properties.radius);
	this.properties.height = this.getInputData(2, this.properties.height);
	var len = centers.getLength();
	this.properties.elements = this.getInputData(3, this.properties.elements);
	if ((this.properties.elements <= 0) || (this.properties.elements > len)) this.properties.elements = len;
	this.properties.step = this.getInputData(4, this.properties.step);
	if (this.properties.step <= 0) this.properties.step = 1;
	if (this.properties.step > len) this.properties.step = len;
	
	for (i = 0; i < len && i < this.properties.elements; i += this.properties.step) {
		var frame = centers.getFrame(i);
		var cylF = moi.command.createFactory( 'cylinder' );
		cylF.setInput(0, true);
		cylF.setInput(1, frame);
		cylF.setInput(3, this.properties.radius);
		cylF.setInput(4, frame.evaluate(0,0,this.properties.height));
		var cyl = cylF.calculate();	
		output.addObject(cyl.item(0));
		cylF.cancel();
	}
	
	this.setOutputData(0, output);	
}

LiteGraph.registerNodeType("Solids/Cylinders", Cylinders);

// Spheres
function Spheres()
{
//	this.size = [60,20];
	this.addInput("Center","pointarray");
	this.addInput("Radius","number");
	this.addInput("Elements","number");
	this.addInput("Step","number");		
	this.addOutput("Out","objectlist");
	this.properties = { radius:1, height:1, elements:1, step:1 };
	
}

Spheres.title = "Spheres";
Spheres.desc = "Spheres";

Spheres.prototype.onExecute = function()
{
	var output = moi.geometryDatabase.createObjectList();
	var centers = this.getInputData(0, new pointArray());
	this.properties.radius = this.getInputData(1, this.properties.radius);
	var len = centers.getLength();
	this.properties.elements = this.getInputData(2, this.properties.elements);
	if ((this.properties.elements <= 0) || (this.properties.elements > len)) this.properties.elements = len;
	this.properties.step = this.getInputData(3, this.properties.step);
	if (this.properties.step <= 0) this.properties.step = 1;
	if (this.properties.step > len) this.properties.step = len;
	
	for (i = 0; i < len && i < this.properties.elements; i += this.properties.step) {
		var frame = centers.getFrame(i);
		var sphF = moi.command.createFactory( 'sphere' );
		sphF.setInput(0, true);
		sphF.setInput(1, frame);
		sphF.setInput(3, this.properties.radius);
		var sph = sphF.calculate();	
		output.addObject(sph.item(0));
		sphF.cancel();
	}
	
	this.setOutputData(0, output);
	
}

LiteGraph.registerNodeType("Solids/Spheres", Spheres);