Texture Joint Animation for Scalable GPU Character Deformation
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Solution Overview
Problem
Existing animation techniques, such as skeletal mesh animation, struggle to scale well for animating multiple characters simultaneously due to high central processing unit utilization, while texture vertex animation lacks runtime flexibility and is limited to specific characters and levels of detail.
Innovation Solution
Texture joint animation, which involves precomputing skeletal animation data and mesh binding data, allowing for runtime deformation of meshes using graphics processing units, enabling reuse of the same skeleton and animation across different characters and levels of detail with selective application of animation subsets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If skeletal mesh animation is used to animate multiple characters, then runtime flexibility is maintained, but central processing unit utilization becomes excessively high and does not scale well
Solution Approach 1:
The patent segments the animation processing into two distinct phases: precomputation phase (offline) and runtime phase. During precomputation, all animation data for multiple characters is generated and stored. During runtime, only lightweight retrieval and application operations are performed. This segmentation allows full runtime flexibility to be maintained while eliminating the CPU bottleneck that occurs when animating multiple characters simultaneously.
Solution Approach 2:
The patent performs preliminary action by precomputing all animation data before runtime execution. The animation curves, transformation matrices, and deformation data for multiple characters are calculated in advance and stored in memory. This allows the runtime system to simply retrieve and apply precomputed data without performing complex calculations, thereby maintaining flexibility while improving scalability to multiple characters.
2Productivity
If texture vertex animation is used for concurrent animation of multiple characters, then performance is improved, but the technique is limited to specific characters at specific levels of detail and cannot be readily extended
Solution Approach 1:
The patent implements universality by creating a character-independent animation system. The precomputation process generates animation data based on skeletal hierarchy and transformation relationships rather than character-specific geometry. This allows the same animation data structure to be applied to any character with a compatible skeletal structure, enabling the system to work across different characters and levels of detail while maintaining high concurrent animation performance.
Solution Approach 2:
The patent utilizes parameter changes by representing animations through adjustable transformation parameters (rotation, translation, scaling) applied to skeletal bones. These parameters can be modified at runtime to animate different characters with the same animation data. The system changes parameters based on the target character's skeletal properties, allowing a single animation set to adapt to multiple characters and detail levels without re-computation.
3Productivity
If texture vertex animation is used, then runtime performance is improved, but runtime variation of the animation is not allowed because the entire animation is precomputed and applied in its entirety
Solution Approach 1:
The patent introduces dynamics by enabling selective application of animation data at runtime. Instead of applying the entire precomputed animation sequence rigidly, the system allows dynamic selection and modification of animation segments. Animation curves can be interpolated, timing can be adjusted, and specific bone transformations can be modified independently. This dynamic approach maintains the performance benefits of precomputation while allowing runtime variation and adaptation of the animation.
Data Source
AI summary
The description relates to computer graphics techniques for generating animations. In the disclosed techniques, skeletal animation data is generated representing a skeleton. A mesh is then bound to the skeleton to create mesh binding data. The skeletal animation data and the mesh binding data can be used to deform the mesh to generate an animation. In some cases, the skeletal animation data and the mesh binding data can be generated during an offline process. Then, the deformation can be performed at runtime, e.g., by a graphics processing unit. The animation can be implemented in many different types of applications, including video games, virtual reality applications, augmented reality applications, etc.