Lyonz Posted October 19, 2010 Share Posted October 19, 2010 Hello all I am wondering if someone could put me in the correct direction, I have created a chain and copied jewels to the points. I was using the wire object node to simulate the movement before, with a weight expression of ( if($PT<2,40,1) ) so that one end would fall faster. However I am wanting to animate the necklace but am not allowed to use RBD, is there an expression I could use to make the chain sway as it falls in the Z axis ? maybe over frames ? as it is meant to simulate as if it was underwater. Or do I have to key frame all of it ??? THANKS IN ADVANCE Quote Link to comment Share on other sites More sharing options...
LFX Posted October 19, 2010 Share Posted October 19, 2010 One interesting way I can think of is with my new favorite SOP - the ray SOP. You can use a grid with e.t. a mountain SOP and project the points of the chain on it. Then you can translate the object horizontally and use the lift value to let the chain fall down. Or - more straight - just the mountain SOP on the points and then with the offset value. Another way is transforming the points with CHOPS via the channel SOP. Of course there has to be a force causing waves, else there's no swaying. Quote Link to comment Share on other sites More sharing options...
Lyonz Posted October 19, 2010 Author Share Posted October 19, 2010 (edited) One interesting way I can think of is with my new favorite SOP - the ray SOP. You can use a grid with e.t. a mountain SOP and project the points of the chain on it. Then you can translate the object horizontally and use the lift value to let the chain fall down. Or - more straight - just the mountain SOP on the points and then with the offset value. Another way is transforming the points with CHOPS via the channel SOP. Of course there has to be a force causing waves, else there's no swaying. Thank you for replying I will test out these methods, at the moment I have been adding bones to the object. This would mean animating it all by hand which I am not keen on but may have to do this if no other methods work, I am wanting the simplest method. Its annoying as I had a beautiful simulation using wire object Thanks Edited November 1, 2010 by Lyonz Quote Link to comment Share on other sites More sharing options...
Lyonz Posted October 19, 2010 Author Share Posted October 19, 2010 (edited) Tried the mountain sop which works to get subtle movement but wanting the chain to be pulled as if underwater. Edited November 1, 2010 by Lyonz Quote Link to comment Share on other sites More sharing options...
Macha Posted October 20, 2010 Share Posted October 20, 2010 How about this? necklace.hip Quote Link to comment Share on other sites More sharing options...
Lyonz Posted October 20, 2010 Author Share Posted October 20, 2010 (edited) How about this? On the example the jewels rotate how can these be fixed to a point position/rotation? Many Thanks necklace.hipnc Edited October 20, 2010 by Lyonz Quote Link to comment Share on other sites More sharing options...
Lyonz Posted October 21, 2010 Author Share Posted October 21, 2010 (edited) ... necklace.hipnc Edited November 1, 2010 by Lyonz Quote Link to comment Share on other sites More sharing options...
Lyonz Posted November 1, 2010 Author Share Posted November 1, 2010 ... I have been looking into the spring sop and think that this will give me the best result. Like before all I am after is the chain getting dragged along the curve attached to a null and have it interact with collision objects. Basically as the null stops I am after it bunching up and slowly falling off again. I am trying to simulate it as if it is underwater and will look into linking it to the lattice sop to see if that helps. Quote Link to comment Share on other sites More sharing options...
Lyonz Posted November 1, 2010 Author Share Posted November 1, 2010 ... Chain_Test.hipnc Quote Link to comment Share on other sites More sharing options...
Lyonz Posted November 1, 2010 Author Share Posted November 1, 2010 ... Updated using the spring sop. Chain_Test.hipnc Quote Link to comment Share on other sites More sharing options...
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