import { Vector3D } from '@awayjs/core';
import { ShaderBase, _Render_RenderableBase, AnimationRegisterData } from '@awayjs/renderer';
import { AnimationElements } from '../data/AnimationElements';
import { ParticleBillboardNode } from '../nodes/ParticleBillboardNode';
import { ParticleAnimator } from '../ParticleAnimator';
import { ParticleStateBase } from './ParticleStateBase';
/**
 * ...
 */
export declare class ParticleBillboardState extends ParticleStateBase {
    /** @private */
    static MATRIX_INDEX: number;
    private _matrix;
    private _billboardAxis;
    /**
     *
     */
    constructor(animator: ParticleAnimator, particleNode: ParticleBillboardNode);
    setRenderState(shader: ShaderBase, renderable: _Render_RenderableBase, animationElements: AnimationElements, animationRegisterData: AnimationRegisterData): void;
    /**
     * Defines the billboard axis.
     */
    get billboardAxis(): Vector3D;
    set billboardAxis(value: Vector3D);
}
//# sourceMappingURL=ParticleBillboardState.d.ts.map