import { mat4, vec3, quat } from 'gl-matrix';
import { InstanceData } from './WebGPUMesh';
export interface Bone {
    name: string;
    parentName: string | null;
    originalOffset: vec3;
    offset: vec3;
    rotation: quat;
    scale: vec3;
    meshType: 'box' | 'sphere' | 'cylinder';
    color: vec3;
    size: vec3;
    worldMatrix: mat4;
}
export interface JointTransform {
    rotation?: quat;
    position?: vec3;
    scale?: vec3;
}
export interface Keyframe {
    time: number;
    transforms: Record<string, JointTransform>;
}
export interface AnimationClip {
    name: string;
    duration: number;
    loop: boolean;
    keyframes: Keyframe[];
}
export declare class CharacterRig {
    id: string;
    name: string;
    bones: Bone[];
    animations: Record<string, AnimationClip>;
    constructor(id: string, name: string);
    getBone(name: string): Bone | undefined;
    /**
     * Evaluates and updates the skeleton joints hierarchy transformations.
     * Traverses bones recursively or in order of hierarchy (parents always defined before children).
     */
    updateSkeleton(rootPos: vec3, rootRot: quat): void;
    /**
     * Evaluates keyframe animation at a specific time (seconds)
     */
    sampleAnimation(clipName: string, time: number): void;
    /**
     * Converts the calculated world matrices into visual mesh instances ready for WebGPUMesh
     */
    generateInstances(meshType: 'box' | 'sphere' | 'cylinder', overrideColors?: Record<string, vec3>): InstanceData[];
}
export declare function buildBipedRobotMech(): CharacterRig;
export declare function buildBlockyHero(): CharacterRig;
export declare function buildArachnidSpider(): CharacterRig;
export declare function buildQuadrupedRig(): CharacterRig;
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