Blend Shape With Nurbs Sphere And Cylinder

[yoshsoy]

Hi,

I'm trying to create simple blendshape between nurbs sphere and nurbs cylinder with both span UV 9 and 6. I selected both 2 row ends of CVs of the cylinder, scaled down Y axis, scaled up X axis and scaled the entire cylinder in Z axis so it kind has trampet shape on both ends. Then I simply made the sphere like egg shape by scaling and deleted those histories.

I select the sphere, shift select the cylinder, and create blendshape. The cylinder deforms but not all the way to the shape of the sphere. If I set the Origin attribute to world in the blendShape attribute, the cylinder deforms all the way but tranforms to the current location of the sphere which I don't want. What am I missing to make it happen? thanks

[drblacksnake]

just create default ones nurbs sphere and nurbs cylinder - make equal amount of spans and just blend.
now adjust shape of the sphere.
thing You were missing was pivot.

[yoshsoy]

hmmm... I still don't get it. I just simply created default nurbs sphere and cylinder, set their sections and spans same, deleted histories, and blend. Up until this point everything is fine. I see the blendShape1 attribute in the cylinder channel box and the Envelope and nurbsSphere1 under the blendShape1 attribute.

Then I simply scaled the sphere down and tried deformation. The cylinder deforms down to the origianal sphere shape but doesn't go further down to new scaled shape.

There is one thing I noticed. Those geometries have different "Min Max Range U and V" values under the NURBS Surface History in their attribute Editors. The sphere has Min Max Range U values 0, 9 and Min Max Range V values 0, 6. The cylinder has Min Max Range U values 0, 2 and Min Max Range V values 0, 6. Actually their Max Range U are different. Does it matter?

[drblacksnake]

read the manual about blendshapes. You are missing VERY basics of it.

[yoshsoy]

alright, I finally figured it out. I was a bit confused when you said thing You were missing was pivot. What I was missing which you are right is very basic, was that I didn't select all the verts after the blendshape. I created default nurbs sphere and cylinder and blend those. Then I select verts of sphere and cylinder this time and modify the shape indiviually.

I just simply scaled the sphere and cylinder non-proportionally after the blendshape before. Thanks for your comment.