Skin deformation method of 3D animation character model based on geometric deformation

Abstract

The invention relates to a geometric deformation based skin deformation method for a three-dimensional animated character model. The method comprises the steps that according to the skeleton structure of an initial character model, the initial character model is divided into joint areas and bone areas, and deformation control points among the bone areas are calibrated manually; according to the body zoom parameters set by a user and the calibrated deformation control points, geometric deformation is implemented on the bone areas of the initial character model based on a free deformation technology; after the geometric deformation, influence of joints on apexes is adjusted; and according to the influence of the joints on the apexes of the joint and bone areas, the character model is driven to make translational and rotary movement via a dual-quaternion method to generate vivid and lifelike skin deformation effect. The skin deformation method of the invention can overcome the defects as collapse and shape explosion caused by large moving amplitude of the model, and obtains more real skin deformation while ensuring the instantaneity.

Description

technical field [0001] The invention belongs to the technical fields of computer animation and computer graphics, and in particular relates to a skin deformation method of a three-dimensional animation character model based on geometric deformation. Background technique [0002] With the development of computer hardware technology and computer software technology, especially graphics and image technology, 3D character animation technology has been widely used in the fields of film and television animation, entertainment games, distance education and military simulation. As an important part of 3D character animation, skin deformation technology is one of the most difficult and challenging research topics in computer graphics. There are two main reasons: (1) The structure of the human body itself is very complex, and it is difficult to understand in biomechanics and graphics. In the field of science, there has not been a model that can fully approximate and simulate human ski...

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Problems solved by technology

(2) Real-time and real-time constraints are mutually restricted. In order to obtain highly realistic skin deformation, it is necessary to establish a complex human body model and perform a large number of physical calculations, which affects the efficiency of the deformation algorithm and is difficult to achieve real-time performance; on the contrary, In order to obtain real-time performance, a simple human model and a simplified algorithm are often used, at the cost of reducing the realism of skin deformation

This kind of method can obtain the double realistic effect of visual realism and physical realism; however, the complexity of human body structure and the cumbersome physical calculation make the calculation speed of this kind of model very slow, even the latest highly optimized algorithm cannot achieve real-time

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