the bag and the shpere has cloth and collsion physics modifier, the shpere with internal springs on, and it worked well in the testing file.
I found if I gave my cellphone model a cloth physic modifier, and turn "internal springs" on, it exploded
So, instead of giving the phone cloth physic directly, I try to add a cube, give the cube the cloth and collsion physic modifier, then, I add object constrait "Child Of" to the cell phone model, set the "Child Of" target to the cube...like this:
the vertex group, I select three point randomly.
but, it acts weird!! Even use a normal cube mesh instead my cellphone model. It always rotates unexpectly...like this:
How this happened? Edit:
the unexpected rotation cube file:
By the way
In fact, I'm trying to make a dancing person with a cellphone in a small transprant bag tied to his arm... I found this is so difficult to me. Even this question is solved, there also many other issues. So despaired. T T
The unexpected rotation smartphone model file: