problem with Kangaroo physics, the wind does not want to blow my surface!

If anybody can help me out with this, I created this surface which is constructed out of two lofted parametric curves, I want to blow air on it but there is an error that I cannot find. Also I want to make the surface to have parametric gradients of two different colors, does anybody now how to do that? thank you very much!

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kourtina1.gh, 36 KB

Replies to This Discussion

Permalink Reply by Daniel Piker on May 17, 2015 at 3:29pm

It looks like the strength of the wind is set too high. Because this force is dependent on the area, and the model is large, a value around 0.01 seems to work.

Permalink Reply by GEORGE SPIRIDAKIS on May 17, 2015 at 5:26pm

thank you Daniel, I did what you suggested and yes the error is gone, but the model does not move...did it move in your case?

Permalink Reply by ng5 Alex on May 17, 2015 at 6:12pm

Hello George

i opened your file. without any anchor points (there were not internalized) the mesh moves but pretty slowly.

maybe you could rethink you mesh creation strategy.

you can start from a flat plane mesh. then apply wind force in combination with curve pull force. the curve can be any curve or a sine curve like the one you provided.

curve pull force will try to pull some points of the mesh, in this case the lowest row of point of the mesh, to the curve, forcing the mesh to adapt to the curve.

in case wind force forces you mesh to fold to much, then you can also use the sphere collide force, in each vertex of the mesh, to reduce excessive folds.this force will simulate collisions between the mesh vertices, so set radius accordingly.

lastly you can constraint you mesh vertices to z axis, not moving with anchor xyz force (setting xy to false and z to true). you can try and recreate the following. (here with 2 curves for pull)

as for the gradients, you need to find the rules of this gradient. i guess you need contours describing your mesh, and then define areas between them that have target colors.

cheers

alex

ps you will need weaverbird plugin for this.

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