Copying points Python SOP

[samboosa]

Hello,

I'm trying to learn python but of all the documentation I've read I'm still not sure where to start...

So I have a set of points which make up a shape, what I want to do is duplicate them upwards and then add various other attributes.

# This code is called when instances of this SOP cook.
node = hou.pwd()
geo = node.geometry()
# Add code to modify the contents of geo.
#Dimensions and offset of incoming geo
height = 0
xoffset = hou.hscriptExpression("$CEX")
zoffset = hou.hscriptExpression("$CEZ")
#Refer to the parameter interface
levels = hou.pwd().evalParm("Levels")
level_height = hou.pwd().evalParm("Level_height")
attrib_name = hou.pwd().evalParm("attrib_name")
#Add attributes
attrib = geo.addAttrib(hou.attribType.Point, attrib_name, 1)
#The function
for point in geo.points():
    for i in range(0,levels):
	    point = geo.createPoint()
	    x_pos = float(xoffset)
	    y_pos = float(height)
	    z_pos = float(zoffset)
	    point.setPosition((0,y_pos+level_height*i,0))
[/CODE]

My problem is at "point.setPosition((0,y_pos+level_height*i,0))" - this translates the copied points upwards, but I don't know how do do this from the original position instead of setting their position to the origin.

Any help would be greatly appreciated!

- Samboosa.

[symek]

pos = point.position() + hou.Vector3((0, y_pos+level_height*i, 0))
point.setPosition(pos)
[/CODE]

also, you may consider:

[CODE]centroid = geo.boudingBox().center()[/CODE]

for $CEX, $CEZ

Edited February 17, 2013 by SYmek

[samboosa]

Thank you SYmek for your reply, unfortunately I'm still getting the same result; all the points are in the center.

I think the problem is the fact that I'm creating points for every point of the input geometry, but from the initial point creation I'm not setting them to the location of the original points.

[samboosa]

Thank you again SYmek, I fixed the problem simply by reordering my code

for i in range(0,levels):
for point in geo.points():
	 x_pos = float(xoffset)
	 y_pos = float(height)
	 z_pos = float(zoffset)
	 pos = point.position() + hou.Vector3((0, y_pos+level_height*i,0))	
	 point = geo.createPoint()
	 point.setPosition(pos)
[/CODE]

In my second code iteration I decided I didn't even need the centroid position, the code that gives me what I want is:

[CODE]
for point in geo.points():
for i in range(0,levels):
pos = point.position() + hou.Vector3((0, level_height,0))
point = geo.createPoint()
point.setPosition(pos)
[/CODE]

Edited February 18, 2013 by samboosa