java - Android - getting the current rotation of a matrix -

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I should be able to set the rotation instead of the matrix set I believe the only way to set the rotation is to know the current rotation of the matrix.

Note: Matrix.Setrettate () will not, because matrix needs to be maintained its information.

What can you do to call getValues ​​ and cache value . When you want to return them later, just call the set value on the matrix.

Update

It is well explained to change the rotation matrix and matrix relation

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