A Method of Constructing High-Strength Bending Constraints from Topological Relations
A topological relationship and high-strength technology, applied in the directions of instruments, calculations, image data processing, etc., can solve problems such as bending constraints that cannot be quickly processed with high hardness, and achieve the effect of ensuring stability and controllability and enhancing the effect of constraints
Active Publication Date: 2021-03-09
江苏原力数字科技股份有限公司
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[0007] The purpose of the present invention is to provide a method for constructing high-strength bending constraints from topological relationships, which solves the problem that the classic PBD constraint method cannot quickly deal with high-hardness bending constraints, and does not need to introduce an additional calculation process to modify the deformation results. Only by adding quantitative constraints, the deformation effect can be calculated in the same PBD simulation process to enhance the constraint effect
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Embodiment 1
[0030] Use the method of constructing high-strength bending constraints from topological relationships to construct high-strength bending constraints for the basketball model in the animation production of character shooting:
[0031] In the process of CG animation production, after the character throws the basketball, the basketball enters the frame and falls to the ground. For this action, the basketball needs to go through a parabola after being thrown, hit the backboard, and enter the frame after the collision. Falling to the ground and bouncing on the ground several times, using traditional human animation at this time takes a lot of time and is not easy to control, because the animation of the throwing process of the basketball needs to be individually controlled at each time point. Where, and the shape of the ball, such as when the ball hits the backboard, what deformation will happen to the impact surface, etc., if it is made manually, it can only be corrected and adjus...
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The present invention provides a method for constructing high-strength bending constraints from topological relations, which includes the following steps: dividing the connected domains of the three-dimensional model to be subjected to dynamic simulation, finding several different connected domains, and obtaining the corresponding In the geometry collection of each connected domain, starting from the point, according to the connection relationship between the edge and the surface, obtain all the vertices of the vertices in the corresponding k ring; select the required vertices among all the vertices of the k ring , each vertex and the selected vertices in its own k-ring determine the constraint condition of the connection relationship, and add it to the three-dimensional model; set the dynamic attribute of the constraint condition of the connection relationship; superimpose the connection relationship on the constraint condition of other objects, and Substitute into PBD for calculation; superimpose the added constraints with the constraints of the 3D model itself, and submit the superimposed constraints to the dynamic simulation engine to enhance the bending constraint effect of the 3D model.
Description
technical field [0001] The invention relates to the technical field of animation production, in particular to a method for constructing high-strength bending constraints from topological relationships. Background technique [0002] In the film and television industry, the simulation (kinetic calculation) of CG animation is a very important part. It can perform dynamic simulation on the already produced 3D solid model (3D graphics described and displayed by point, edge and surface in the computer, hereinafter referred to as model), endowing gravity, wind field and collision effects close to the real world, so that After the model is made, various deformation effects can be produced in a CG animation scene by setting parameters, and these effects interact with the human animation effects produced by the animator to simulate various special effects close to the real world. This can not only enhance the details of the animation effect, but also save animation production time; ...
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IPC IPC(8): G06T13/20
CPCG06T13/20
Inventor 赵锐侯志迎李学
Owner 江苏原力数字科技股份有限公司