import { AbstractShaderNode } from '../core/AbstractShaderNode';
/**
 * A shader node that provides joint attribute functionality for skeletal animation.
 * This node outputs a Vec4 joint attribute value that can be used in vertex shaders
 * for bone skinning operations.
 *
 * The node supports both WebGL (GLSL) and WebGPU (WGSL) shader backends.
 *
 * @example
 * ```typescript
 * const jointNode = new AttributeJointShaderNode();
 * // Use in a material's shader graph for skeletal animation
 * ```
 */
export declare class AttributeJointShaderNode extends AbstractShaderNode {
    /**
     * Constructs a new AttributeJointShaderNode.
     *
     * Initializes the node with joint attribute shader code for both GLSL and WGSL,
     * sets it as a vertex stage shader, and configures the output to be a Vec4 float
     * representing joint indices or weights.
     */
    constructor();
}