CN102521792A

CN102521792A - Method for optimizing skeletal animation reusing and memory usage

Info

Publication number: CN102521792A
Application number: CN2011103625059A
Authority: CN
Inventors: 戚军
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-16
Filing date: 2011-11-16
Publication date: 2012-06-27

Abstract

The invention relates to a skeletal animation reusing method, in particular to a method for optimizing the skeletal animation reusing and the memory usage, and belongs to the field of computer graphics. The mode of carrying out logic blocking on animation data is adopted to carry out recombination on motion data of different skeletons and novel skeletal animations which completely do not need to be fused and calculated are output; the newly formed animations occupy a small memory and most of the novel skeletal animations consist of the existing small logic animation units; meanwhile, the novel skeletal animations are beneficial to the reduction of the workload of a graphic designer; and a great amount of novel skeletal animations are the reused skeletal animations, so that the animation loading speed is provided.

Description

A kind of skeleton cartoon is reused the optimization method with EMS memory occupation

Technical field

The present invention relates to a kind of skeleton cartoon method for reusing, be specifically related to a kind of skeleton cartoon and reuse the optimization method with EMS memory occupation, it belongs to field of Computer Graphics.

Background technology

Present role animation adopts the mode of key-frame animation or skeleton cartoon mode to realize usually.Key-frame animation; Through prepare one group of value (extracting in the frame of these values comparison key from animation sequence) with time correlation for the attribute that needs animation effect; And the value in the frame can be used these key values At All Other Times; The employing linear interpolation method calculates, thereby reaches the smooth animation effect of comparison.In the common 3D role animation, key-frame animation is that grid (Mesh) model to the personage adopts key frame to generate animation.Yet,, so need bigger storage space because key-frame animation all must be stored the position on all summits for each key frame.Comprise complex component, relate to for the role of a lot of key points for one, need bigger storage space.In addition, because the role is an articulate structure (not being a rigid body), the linear interpolation method on summit can not guarantee polygonal relevant dimension, and middle frame will twist body, thereby produces the distortion of grid.

In skeleton cartoon, the animated character is represented by two parts: a part is a series of skeleton that form level, i.e. skeleton (skeleton), and each skeleton data all comprises the animation data of himself; Another part is the skin (skin) that covers on skeleton, and promptly grid model is used to provide needed geometric model of animate and texture and material information.Through skeleton is carried out animation simulation, utilize skeleton control skin deformation just to realize role animation again.

Skeleton cartoon itself also has its shortcoming, and it is not high that it is mainly reflected in the animation reusability.Why reuse is low for animation, is because identical animation seldom exists.Although can merge dealing with problems of part through animation, but the animation fusion need be play a plurality of animations simultaneously, and just meaning needs additional calculation, does not utilize the lifting of frame number.

Summary of the invention

Defective in view of existing method existence; This reality invention is to provide a kind of bone to reuse the optimization method with EMS memory occupation; It adopts and animation data is carried out logic partitioning gets mode; To the method that the exercise data of different bones makes up once more, reached and improved bone and reduce skeleton cartoon storage space and the purpose that improves reuse.

To achieve these goals, a kind of bone of the present invention is reused the optimization method with EMS memory occupation, and implementation step is following:

(1) skeleton cartoon of all existing usefulness is added up, skeleton cartoon is carried out logic partitioning according to statistics;

(2), split according to the logic partitioning data all existing skeleton cartoons; The animation of a model splits into the animation of a plurality of little logical blocks exactly;

(3) in little logical block animation, seek and the new approaching skeleton cartoon unit of animation demand key frame;

(4) through the reorganization skeleton cartoon, form the brand-new property quoted skeleton cartoon according to the logical block piece, he only comprises index, does not have real data.

Said step 1 pair all skeleton cartoons have a standard to carry out logic groups; The formulation principle of its standard is following:

(1) be elder generation with minimum skew joint frame bone;

(2) be elder generation with the actual bone of human body;

Seek the zero offset number of times of each point through the facility of many all existing skeleton cartoons,, be divided into head to the people like our custom in conjunction with our rational faculty, health, arm, shank several sections are example, and personage's bone is carried out logic partitioning.

Work in the said step 3 further comprises:

(1) skeleton cartoon of new demand is made the key frame of number percent, confirmed matching value substantially;

(2) according to being worth substantially, the logic key frame behind the existing piecemeal is mated the debugging effect.

The coupling aspect of said close animation, we adopt following formula to carry out:

Approximation coefficient=(data-sample skeleton data of new animation bone 1) * (data-sample skeleton data of new animation bone 1)+(data-sample skeleton data of new animation bone 2) * (data-sample skeleton data of new animation bone 2) ... .. (data-sample skeleton data of new animation bone n) * (data-sample skeleton data of new animation bone n);

What adopt here is Euclidean distance, the reaction of his image 2 vectors, i.e. the direct deviation of the animation data of bone; We formulate the accurate degree that we mate animation through control deviation.

(3) when finding that all logic partitionings do not satisfy the animation of current logic partitioning, import new logical block to enrich the animation logical base by the art designing.

The invention has the advantages that: adopt this that animation data is carried out logic partitioning and get mode, the exercise data of different bones is made up once more, export completely newly, need not merge the skeleton cartoon of calculating fully; The new animation that forms takies internal memory seldom, and he is made up of existing little logic animation unit major part, and he also helps reducing art designing's workload simultaneously, owing to much reuse the speed that provides animation to load.

Embodiment

A kind of bone is reused the optimization method with EMS memory occupation, and implementation step is following:

(3) be elder generation with minimum skew joint frame bone;

(4) be elder generation with the actual bone of human body;

Work in the said step 3 further comprises:

Implementation process of the present invention is divided into: the logic bone splits module 1, the animation logic splits module 2, new animation demand module 3 and animation frame module 4; Said logic bone splits module 1: output is as the set of each bone that splits point; Said animation logic splits module 2: according to the output of module 1, promptly bone divides into groups current skeleton cartoon is split, and splits its skeleton cartoon by a completion, forms the skeleton cartoon of group one by one; Said new animation demand module 3: in the logic animation library, search close frame, make non-existent new logic frame; Said animation frame module 4: form brand-new animation frame by the logical frame of each sub-module.

At first split module 1 and will have the bone fractionation now, form the set that splits each skeleton point of back through the logic bone; Split module 2 through the animation logic, divide into groups current skeleton cartoon is split, split its skeleton cartoon by a completion according to bone; Form the skeleton cartoon of group one by one; Through new animation demand module 3, in the logic animation library, searching close frame, make non-existent new logic frame; Through animation frame module 4, the logical frame of each sub-module is formed brand-new animation frame at last.

Claims

1. a bone is reused the optimization method with EMS memory occupation, and implementation step is following:

2. a kind of bone according to claim 1 is reused the optimization method with EMS memory occupation, it is characterized in that: said step 1 pair all skeleton cartoons have a standard to carry out logic groups; The formulation principle of its standard is following:

(1) be elder generation with minimum skew joint frame bone;

(2) be elder generation with the actual bone of human body;

3. a kind of bone according to claim 1 is reused the optimization method with EMS memory occupation, it is characterized in that: the work in the said step 3 further comprises:

(2) according to being worth substantially, the logic key frame behind the existing piecemeal is mated the debugging effect;

What adopt is Euclidean distance, the reaction of his image 2 vectors, i.e. the direct deviation of the animation data of bone; We formulate the accurate degree that we mate animation through control deviation;