A 3D human model bone dynamic transfer binding method

Abstract

The invention discloses a method for dynamic transfer and binding of bones of a three-dimensional human model, which comprises the following steps: binding a benchmark model with its corresponding bone structure and skin weight, and exporting a model file that can support both bones and animation effects; Affine transformation obtains the affine transformation matrix M of each grid point, and calculates H, R1, and R2 respectively; in the state of vector right multiplication, combine H*R1*R2 to obtain the coordinate system of the target model to the coordinate system of the reference model The transformation matrix M of M is de-inverted to obtain the binding matrix Z; the grid points of the target model are skinned; the coordinate position of the reference bone point in the reference bone hierarchy is modified to make the bone length consistent; and the reference is modified according to the rotation matrix The coordinate position of the base bone point in the bone hierarchy. The invention can realize the automatic binding of the reference model and the target model, perform automatic and fast transfer of animation change effects, and generate a reference model driving animation and skeleton in real time.

Description

technical field

[0001] The invention relates to the field of dynamic three-dimensional human body model design, in particular to a method for dynamically transferring and binding bones of a three-dimensional human body model. Background technique

[0002] The human body model library has broad application prospects in the fields of virtual fitting, clothing customization, and Internet fitness. With the development of 3D scanning hardware, it becomes easier to obtain a 3D model of the human body. However, since the generated model is in obj format and does not support bones and animations, in order to make the model more alive and interesting, it is necessary to make the model move. The conventional method is that motion designers use 3D software such as 3DMax and Maya to manually bind human bones and skin weights, and then design character motions on the bones, which is time-consuming and labor-intensive, with low operating efficiency, and can only be operated offline , It ...

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