@awayjs/graphics/lib/animators/states/ParticlePositionState.ts

AwayJS graphics classes

import { Vector3D } from '@awayjs/core';

import { ContextGLVertexBufferFormat } from '@awayjs/stage';

import { ShaderBase, _Render_RenderableBase, AnimationRegisterData } from '@awayjs/renderer';

import { AnimationElements } from '../data/AnimationElements';
import { ParticlePropertiesMode } from '../data/ParticlePropertiesMode';
import { ParticlePositionNode } from '../nodes/ParticlePositionNode';

import { ParticleAnimator } from '../ParticleAnimator';

import { ParticleStateBase } from './ParticleStateBase';

/**
 * ...
 * @author ...
 */
export class ParticlePositionState extends ParticleStateBase {
	/** @private */
	public static POSITION_INDEX: number = 0;

	private _particlePositionNode: ParticlePositionNode;
	private _position: Vector3D;

	/**
	 * Defines the position of the particle when in global mode. Defaults to 0,0,0.
	 */
	public get position(): Vector3D {
		return this._position;
	}

	public set position(value: Vector3D) {
		this._position = value;
	}

	/**
	 *
	 */
	public getPositions(): Array<Vector3D> {
		return this._pDynamicProperties;
	}

	public setPositions(value: Array<Vector3D>): void {
		this._pDynamicProperties = value;

		this._pDynamicPropertiesDirty = new Object();
	}

	constructor(animator: ParticleAnimator, particlePositionNode: ParticlePositionNode) {
		super(animator, particlePositionNode);

		this._particlePositionNode = particlePositionNode;
		this._position = this._particlePositionNode._iPosition;
	}

	/**
	 * @inheritDoc
	 */
	public setRenderState(shader: ShaderBase, renderable: _Render_RenderableBase, animationElements: AnimationElements, animationRegisterData: AnimationRegisterData): void {
		if (this._particlePositionNode.mode == ParticlePropertiesMode.LOCAL_DYNAMIC && !this._pDynamicPropertiesDirty[animationElements._iUniqueId])
			this._pUpdateDynamicProperties(animationElements);

		const index: number = animationRegisterData.getRegisterIndex(this._pAnimationNode, ParticlePositionState.POSITION_INDEX);

		if (this._particlePositionNode.mode == ParticlePropertiesMode.GLOBAL)
			shader.setVertexConst(index, this._position.x, this._position.y, this._position.z);
		else
			animationElements.activateVertexBuffer(index, this._particlePositionNode._iDataOffset, shader.stage, ContextGLVertexBufferFormat.FLOAT_3);
	}
}