import { Vector3D } from '@awayjs/core';
import { ShaderRegisterCache } from '@awayjs/stage';
import { AnimationRegisterData, ShaderBase } from '@awayjs/renderer';
import { ParticleProperties } from '../data/ParticleProperties';
import { ParticleAccelerationState } from '../states/ParticleAccelerationState';
import { ParticleAnimationSet } from '../ParticleAnimationSet';
import { AnimatorBase } from '../AnimatorBase';
import { ParticleNodeBase } from './ParticleNodeBase';
/**
 * A particle animation node used to apply a constant acceleration vector to the motion of a particle.
 */
export declare class ParticleAccelerationNode extends ParticleNodeBase {
    /** @private */
    _acceleration: Vector3D;
    /**
     * Reference for acceleration node properties on a single particle (when in local property mode).
     * Expects a <code>Vector3D</code> object representing the direction of acceleration on the particle.
     */
    static ACCELERATION_VECTOR3D: string;
    /**
     * Creates a new <code>ParticleAccelerationNode</code>
     *
     * @param               mode            Defines whether the mode of operation acts on local properties of a particle or global properties of the node.
     * @param    [optional] acceleration    Defines the default acceleration vector of the node, used when in global mode.
     */
    constructor(mode: number, acceleration?: Vector3D);
    /**
     * @inheritDoc
     */
    getAGALVertexCode(shader: ShaderBase, animationSet: ParticleAnimationSet, registerCache: ShaderRegisterCache, animationRegisterData: AnimationRegisterData): string;
    /**
     * @inheritDoc
     */
    getAnimationState(animator: AnimatorBase): ParticleAccelerationState;
    /**
     * @inheritDoc
     */
    _iGeneratePropertyOfOneParticle(param: ParticleProperties): void;
}
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