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D Force Curtain?

DekeDeke Posts: 1,631
in New Users

I'm finally trying out D force. I'm trying to animate a curtain blowing in the breaze by an open window. Thanks to a couple tutorials I've been able to load the items and add a D force dynamic modifier to it. So far so good, but it seems there is a default that the item decends to the floor. Is there a easy way to make a piece of cloth pinned at the top...as in along a curtain rod...but blowing gently?

 

 

Comments

  • Richard HaseltineRichard Haseltine Posts: 100,842

    Two options - apply a weight acess node and weight the top edge for zero dynamic strength, or use the Geometry Editor to select teh top edge, assign it to a new surface by right-click menu, and make that surface dynamic strength zero.

  • DekeDeke Posts: 1,631
    edited January 2018

    Thanks. I'll try that. Will that help with the dropping motion?  I tried to adjust that with a keyframe, but didn't work. I take it that the dropping motion is not really an issue with any keyframing, but with some sort of gravitational effects that kicks in automatically when something is turned into a dforce surface?

     

    Post edited by Deke on
  • murgatroyd314murgatroyd314 Posts: 1,517
    Deke said:

    Thanks. I'll try that. Will that help with the dropping motion?  I tried to adjust that with a keyframe, but didn't work. I take it that the dropping motion is not really an issue with any keyframing, but with some sort of gravitational effects that kicks in automatically when something is turned into a dforce surface?

     

    That's right. What you've got is basically a piece of cloth that starts out unsupported in mid-air. The third option, which I just did a quick test of, is to put a non-dynamic object in the scene to physically hold the curtain up.

  • DekeDeke Posts: 1,631

    Thanks. I'll give those things a try.  Great stuff.

  • DekeDeke Posts: 1,631

    Tried both selecting top geometry of the curtain and setting it to 0 dynamic strength, and also adding a cylinder "rod" and parenting the curtain to it. Neither has prevented the curtain from dropping toward the ground. Any thoughts?

  • DekeDeke Posts: 1,631

    Here are Start and Finish images. You can see the "rod" I added and parented the curtain to. 

     

    curtain 1.jpg
    720 x 405 - 121K
    curtain 2.jpg
    720 x 405 - 127K
  • Richard HaseltineRichard Haseltine Posts: 100,842

    Just [parenting won't help - having the rod, with a fair number of divisions, overlap the top of the curtain may. How did you assign the zero dynamic strength?

  • DekeDeke Posts: 1,631

    I created the rod as a cylinder. Then in the simulation setting panel: hamburger menu....dforce..."static surface." And then in surfaces panel....simulation...Dynamic Strength, settig that to 0. 

    How is the curtain element linked to the curtain if not by parenting?

  • murgatroyd314murgatroyd314 Posts: 1,517
    Deke said:

    How is the curtain element linked to the curtain if not by parenting?

    I connected mine by having it physically overlap at the top of the curtain. This traps the curtain in place where the mesh intersects.

  • DekeDeke Posts: 1,631

    Tried that but it doesn't work.  HAve the cylinder piercing the fabric of the currtain.  Set the curtain to Gravity of 2.   Now it doesn't move at all.  Any chance you can give me a step by step of how you set up your file?

  • murgatroyd314murgatroyd314 Posts: 1,517

    My test scene was very simple. The curtain is a plane primitive, 2 meters on a side, with 200 divisions, rotated into a vertical position. The rod is a primitive cylinder, 2.2 meters long, 5 centimeters in diameter, with 220 segments and 12 sides. It's positioned so the axis of the cylinder is more-or-less at the top edge of the curtain. The only other thing in the scene is the dForce wind node.

  • DekeDeke Posts: 1,631

    How do you set up a Wind Node?  I don't see that in the surface...simulation settings.

  • murgatroyd314murgatroyd314 Posts: 1,517

    It's near the bottom of the Create menu.

  • DekeDeke Posts: 1,631

    Got it. You/d think that would be in the simulation panel. 

  • mahhenmahhen Posts: 73

    d force curtains would be nice item to have in daz store and some morphs/styles for it, now the best one we have is this old one https://www.daz3d.com/studio-drapes-base-pack

  • MelanieLMelanieL Posts: 7,382
    mahhen said:

    d force curtains would be nice item to have in daz store and some morphs/styles for it, now the best one we have is this old one https://www.daz3d.com/studio-drapes-base-pack

    Well there is this set: https://www.daz3d.com/dforce-studio-drapery

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