Hello, everyone
I have a problem when modeling a stitch of a non-crimp fabric. On the node connection point, the stitch deformed which can be seen from the figure below. I don't know why. Could anyone tell me where is wrong? I attached my code below. Thanks very much!
Textile = CTextile()
StitchYarn = CYarn()
w = 2.3
s = 2.4
h = 0.1
w1 = 1.0
s1 = 4.0
h1 = 0.05
a = 0.04
r = 0.025
u = 1.5*h+r
d = -0.5*h-r
StitchYarn.AddNode(CNode(XYZ(2*a, a, u)))
StitchYarn.AddNode(CNode(XYZ(s+a, s1-a, u)))
StitchYarn.AddNode(CNode(XYZ(s+a, s1, d)))
StitchYarn.AddNode(CNode(XYZ(s+2*a, 2*s1-a, d)))
StitchYarn.AddNode(CNode(XYZ(s+a, 2*s1, d+a)))
StitchYarn.AddNode(CNode(XYZ(s-a, 2*s1, d+a)))
StitchYarn.AddNode(CNode(XYZ(s-2*a, 2*s1-a, d)))
StitchYarn.AddNode(CNode(XYZ(s-a, s1, d)))
StitchYarn.AddNode(CNode(XYZ(s-2*a, s1+a, u)))
StitchYarn.AddNode(CNode(XYZ(-a, 2*s1-a, u)))
StitchYarn.AddNode(CNode(XYZ(-a, 2*s1, d)))
StitchYarn.AddNode(CNode(XYZ(-2*a, 3*s1-a, d)))
StitchYarn.AddNode(CNode(XYZ(-a, 3*s1, d+a)))
StitchYarn.AddNode(CNode(XYZ(a, 3*s1, d+a)))
StitchYarn.AddNode(CNode(XYZ(2*a, 3*s1-a, d)))
StitchYarn.AddNode(CNode(XYZ(a, 2*s1, d)))
StitchYarn.AddNode(CNode(XYZ(2*a, 2*s1+a, u)))
StitchYarn.AddRepeat(XYZ(s, 0, 0))
StitchYarn.AddRepeat(XYZ(0, 2*s1, 0))
StitchSection = CSectionEllipse(0.05, 0.05)
StitchYarn.AssignSection(CYarnSectionConstant(StitchSection))
StitchYarn.AssignInterpolation(CInterpolationBezier())
StitchYarn.SetResolution(8)
Textile.AddYarn(StitchYarn)
AddTextile("stitch", Textile)
Problem on modeling the stitch of non-crimp fabric
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lomoclarke
- Posts: 3
- Joined: Fri Sep 19, 2014 5:17 am
Problem on modeling the stitch of non-crimp fabric
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Re: Problem on modeling the stitch of non-crimp fabric
Hi,
The problem with the deformations on the vertical yarn sections should be easy to solve: If you look in section 2.5 of Martin Sherburn’s PhD thesis here http://etheses.nottingham.ac.uk/303/1/thesis-final.pdf you will find a description of the use of an ‘up’ vector used to generate the yarn surface. In the case of vertical yarns the vector needs to be redefined, typically to a unit vector in the x or y directions. If you look in your tg3 file you will see the up vector specified for each node. You can either edit this in the tg3 file or,alternatively, if you’ve written a script to generate your textile you can specify it using the CNode SetUp(XYZ Up) function.
Hope that helps,
Louise
The problem with the deformations on the vertical yarn sections should be easy to solve: If you look in section 2.5 of Martin Sherburn’s PhD thesis here http://etheses.nottingham.ac.uk/303/1/thesis-final.pdf you will find a description of the use of an ‘up’ vector used to generate the yarn surface. In the case of vertical yarns the vector needs to be redefined, typically to a unit vector in the x or y directions. If you look in your tg3 file you will see the up vector specified for each node. You can either edit this in the tg3 file or,alternatively, if you’ve written a script to generate your textile you can specify it using the CNode SetUp(XYZ Up) function.
Hope that helps,
Louise