Contextual Animation Rigging for Game Engine Efficiency
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Solution Overview
Problem
Current animation rigging methods in game engines require significant CPU and memory usage due to the need for extensive analysis and application of multiple control rigs for each animation clip, leading to inefficiencies in processing and memory management.
Innovation Solution
A method and system that apply a state-specific control rig to an animation clip only when necessary, reducing computational demands by determining the relevant control rig based on the character's state and blending animation clips when transitioning between states, thereby minimizing unnecessary rigging evaluations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a generic control rig is used for all animation clips, then the rigging system is simple to implement, but CPU and memory usage increase significantly due to extensive analysis required for each animation clip
Solution Approach 1:
The patent segments the animation rigging process by dividing animation clips into different states (e.g., walking, running, idle) and assigning specific control rigs to each state. This segmentation eliminates the need for extensive analysis of a generic control rig for every animation clip, as the appropriate control rig is already determined by the state classification.
Solution Approach 2:
The patent applies preliminary action by pre-associating control rigs with specific animation states during the animation creation process. When an animation clip is classified into a state, the corresponding control rig is automatically selected without requiring runtime analysis, thus improving processing efficiency while maintaining system simplicity.
2Manufacturing precision
If multiple control rigs are used for different character parts, then the rigging precision is improved, but CPU and memory usage increase due to analysis of each control rig for every animation clip
Solution Approach 1:
The patent applies local quality by assigning different control rigs to different character parts (e.g., arm rigging, leg rigging, face rigging) and selectively applying only the relevant control rigs based on the animation state and the body parts involved in that state. This avoids the computational overhead of analyzing all control rigs for every animation clip while maintaining high rigging precision where needed.
Solution Approach 2:
The patent segments the control rig system into multiple specialized rigs for different body parts and implements selective application based on state analysis. Only the control rigs relevant to the current animation state and involved body parts are applied, reducing computational requirements while preserving rigging precision for the specific parts being animated.
3Adaptability or versatility
If extensive analysis is performed to determine which control rig to apply, then the adaptability of the rigging system is improved, but computational time and resource usage increase
Solution Approach 1:
The patent performs preliminary classification of animation clips into states during the animation creation or preprocessing phase. This preliminary action establishes the mapping between states and control rigs in advance, allowing the system to maintain high adaptability by selecting the appropriate control rig based on pre-determined state classifications without requiring extensive runtime analysis.
Solution Approach 2:
The patent creates state-specific copies or instances of control rigs that are tailored to each animation state. Instead of analyzing which control rig to apply from a large set, the system has pre-configured control rig instances for each state, enabling rapid selection and application while maintaining adaptability to different animation contexts.
Data Source
AI summary
There is described a method for applying a control rig to an animation of a character, the method comprising: receiving a state change for the character being in a first state; determining a second state for the character using the state change; retrieving an animation clip and a control rig both corresponding to the second state, the animation clip comprising a plurality of poses for the character each defining a configuration for a body of the character, the control rig being specific to the second state and corresponding to at least one constraint to be applied on the body of the character; applying the control rig to the animation clip, thereby obtaining a rigged animation clip; and outputting the rigged animation clip.