Problem with tutorial script.

Coding Python Support
1

I have two questions. I’m working onthe tutorial that comes in the documentation at Blender.org. I copy the script exactly as it is but when I open it in blender and I try to run it displays this error.

File poly test.py line 8
008 # but it is a nice complete script example, and the
__^
Syntax error, invalid token

Why it would give me an error on this line? Everything looks fine. My other question is that if giving the numbers of each script line at the left are necessary?

Thanks

2

Remove all line numbers from the example

only reason they are there is to help document the code

Code should look like this:

######################################################
#
# Demo Script for Blender 2.3 Guide
#
###################################################S68
# This script generates polygons. It is quite useless
# since you can do polygons with ADD->Mesh->Circle
# but it is a nice complete script example, and the
# polygons are 'filled'
######################################################
######################################################
# Importing modules
######################################################

import Blender
from Blender import NMesh
from Blender.BGL import *
from Blender.Draw import *

import math
from math import *

# Polygon Parameters
T_NumberOfSides = Create(3)
T_Radius        = Create(1.0)

# Events
EVENT_NOEVENT = 1
EVENT_DRAW    = 2
EVENT_EXIT    = 3

######################################################
# GUI drawing
######################################################
def draw():
	global T_NumberOfSides
	global T_Radius
	global EVENT_NOEVENT,EVENT_DRAW,EVENT_EXIT

	########## Titles
	glClear(GL_COLOR_BUFFER_BIT)
	glRasterPos2d(8, 103)
	Text("Demo Polygon Script")

	######### Parameters GUI Buttons
	glRasterPos2d(8, 83)
	Text("Parameters:")
	T_NumberOfSides = Number("No. of sides: ", EVENT_NOEVENT, 10, 55, 210, 18,
                    T_NumberOfSides.val, 3, 20, "Number of sides of out polygon");
	T_Radius        = Slider("Radius: ", EVENT_NOEVENT, 10, 35, 210, 18,
                    T_Radius.val, 0.001, 20.0, 1, "Radius of the polygon");

	######### Draw and Exit Buttons
	Button("Draw",EVENT_DRAW , 10, 10, 80, 18)
	Button("Exit",EVENT_EXIT , 140, 10, 80, 18)

def event(evt, val):	
	if (evt == QKEY and not val): 
		Exit()

def bevent(evt):
	global T_NumberOfSides
	global T_Radius
	global EVENT_NOEVENT,EVENT_DRAW,EVENT_EXIT

	######### Manages GUI events
	if (evt == EVENT_EXIT): 
		Exit()
	elif (evt== EVENT_DRAW):
		Polygon(T_NumberOfSides.val, T_Radius.val)
 		Blender.Redraw()

Register(draw, event, bevent)

######################################################
# Main Body
######################################################
def Polygon(NumberOfSides,Radius):

	######### Creates a new mesh
	poly = NMesh.GetRaw()

	######### Populates it of vertices
	for i in range(0,NumberOfSides):
	  phi = 3.141592653589 * 2 * i / NumberOfSides
	  x = Radius * cos(phi)
	  y = Radius * sin(phi)
	  z = 0

	  v = NMesh.Vert(x,y,z)
	  poly.verts.append(v)

	######### Adds a new vertex to the center
	v = NMesh.Vert(0.,0.,0.)
	poly.verts.append(v)

	######### Connects the vertices to form faces
	for i in range(0,NumberOfSides):
		f = NMesh.Face()
		f.v.append(poly.verts[i])
		f.v.append(poly.verts[(i+1)%NumberOfSides])
		f.v.append(poly.verts[NumberOfSides])
		poly.faces.append(f)

	######### Creates a new Object with the new Mesh
	polyObj = NMesh.PutRaw(poly)

	Blender.Redraw()
3

I removed the numbers and the script now works. Are the numbers necessary? I remember I used to put those numbers in my ancient Atari64 long time ago using basic (yes, I’m that old). Anyway thanks again. :smiley: :smiley: :smiley:

4

You dont use the numbers at all

5

Numbers are there just for helping commenting the script.

Actually the second button from left in the text woindow header hides/shows line numbers!

Stefano