Need Help - Modeling curved surfaces

Support Modeling
1

Hi!

I need your help, please…

Im new to blender, and i need to model a simple plain, which is curved in depth like a sin function… is there an easy way of doing this?

thank you very much!

2

I’d say model your plane into the shape of a single wave function and then use the array modifier.

Or maybe use a bezier curve and make it the appropriate shape, then bevel a line along that curve. I’m not sure it would work, though. I am no expert myself!

3

I would create the sine curve using a Bezier Curve, convert that to a Mesh, and extrude it on the depth axis. If you need a mathematically-correct profile to the Curve, I’d be inclined to generated that curve externally as 2D art and use that as a background Image to fit the Curve to.

4

How about the wave modifier then array mod on a curve or grid to get your shape then apply.

5

how about a script to do an exact sin function

i can upload this sin function if you need to use it with high precision
how many points you need for this sin shape?

happy 2.6

6

there is an addon …

its called Mesh Extra Objects
and if enabled its under menu:
for Add-Mesh: Extra Objects->Math-Functions->Z-Surface

in the function window replace the function with:
1 - sin(x)

then change the x-range to cover a whole (or more) sinus-wave:
2 * 3.1415
(pi … has more but its enough for me to know this 4 digits)
and
pull up the count of resolution for x, maybe 50 … or more to get a smooth
shape …
because you get a minimum of some depth i y-axis and if you only want
one single mesh-line,
in edit-mode
select none and then select
with Alt-RMB a vertice-loop,
select the inverse (that is all except the one line)
and delete the other vertices.

You may use other math-function to generate fancy stuff … :wink:

7

i would appreciate the script!
will it work for blender 2.49 and python 2.5.2?
and i need a 1/4, 1/2 and 1 complete sin. function…

and anyone has any idea why does the game engine im usind tottaly ignores curves being turned into mesh, but is fully aware of “original” meshes?

thanks a lot for you answers!

8

load this up in text editor

and run it it will create a sin function with a few cycles


 
 
# Author  Rickyblender  1 Nov 2011
 
import bpy
import mathutils
from math import *
from bpy.props import *
import random
 
 
####
 
def create_Sinewave(tris_name):
 
 
 global edgeId,medges, mn_type_act, mesh_name
 
 
 pt1=[]
 verts1 = []
 
 vid1=0
 edges1=[]
 medges1=[]
 
 
 genr=5.0
 medges=[]
 edgeId = 0
 x0 = -1*pi
 x0=0
 yoffset=3
 
 cyclemax = 3
 N = 0
 
 x = x0
 y = 0
 xoffset=0
 
 print (' begin  function sin Wave')
 
 
 mn_type_act = 1
 
 
 
 mverts = [[x0, yoffset, 0]]
 while N < cyclemax:
  while x < (2 * pi * cyclemax) + x0:    
   x += 0.1
   y=sin(x)
 
   pt = [x,y+yoffset,0]
 
   verts1.extend([pt])
 
   if edgeId > 0:
    edges1.append([edgeId-1,edgeId])
 
   edgeId += 1
 
  N += 1
 
 named1="Sin_function"
 
 mesh = bpy.data.meshes.new(named1)
 mesh.from_pydata(verts1, edges1, [])
 
 mesh.update()
 
 obj = bpy.data.objects.new( named1, mesh )
 scene = bpy.context.scene
 scene.objects.link( obj )
 
 
 
####
 
 
create_Sinewave("Sine wave")

have fun with sin