egret-docs-master/Engine3D/Effect/ParticleUserDefined/README.md

特效

本教程主要介绍了在egret3d引擎中使用自定义粒子

粒子特效：粒子由ParticleData和MaterialBase两个数据生成，我们可以自定义一个粒子，或者通过插件来导出Unity中的粒子特效。

• 自定义ParticleData，即手动编写代码生成一个粒子（注：你需要准备好一个材质球数据）

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//创建一个粒子特效
private createParticle():void{
    var material: MaterialBase = this.createMaterial();
    var particleData: ParticleData = this.createParticleData();
    this.particle = new ParticleEmitter(particleData, material);
    this.particle.play();
    this.view1.addChild3D(this.particle);
}

//创建一个粒子数据
private createParticleData(): ParticleData {
    var data: ParticleData = new ParticleData();
    data.geometry.planeW = data.geometry.planeH = 30;


    var life: ParticleDataLife = data.life;
    life.max = 6;
    life.min = 6;
    life.duration = 5;
    life.delay = 0.5;
    life.loop = true;

    var emission: ParticleDataEmission = data.emission;
    emission.rate = 2;

    var property: ParticleDataProperty = data.property;
    property.particleCount = 100;
    property.renderMode = ParticleRenderModeType.StretchedBillboard;
    property.colorConst1.setTo(255, 255, 255, 255);
    property.colorConst2.setTo(255, 255, 255, 255);
    property.gravity = 5;

    var speed: ParticleDataMoveSpeed = data.moveSpeed;
    speed.max = 50;
    speed.min = 50;

    var velocityOver: VelocityOverLifeTimeData = new VelocityOverLifeTimeData();
    speed.velocityOver = velocityOver;
    speed.velocityOver.type = ParticleValueType.OneBezier;

    var xBezier: BezierData = new BezierData();
    xBezier.posPoints.push(new Point(0, 0));
    xBezier.posPoints.push(new Point(0.5, 20));
    xBezier.posPoints.push(new Point(0.5, 20));
    xBezier.posPoints.push(new Point(1.0, 8));

    xBezier.ctrlPoints.push(new Point(0, 10));
    xBezier.ctrlPoints.push(new Point(0.55, 20));
    xBezier.ctrlPoints.push(new Point(0.55, 20));
    xBezier.ctrlPoints.push(new Point(1.0, 8));

    speed.velocityOver.xBezier1 = xBezier;

    var yBezier: BezierData = new BezierData();
    yBezier.posPoints.push(new Point(0, 0));
    yBezier.posPoints.push(new Point(0.7, 40));
    yBezier.posPoints.push(new Point(0.7, 40));
    yBezier.posPoints.push(new Point(1.0, 16));

    yBezier.ctrlPoints.push(new Point(0, 10));
    yBezier.ctrlPoints.push(new Point(0.75, 40));
    yBezier.ctrlPoints.push(new Point(0.76, 40));
    yBezier.ctrlPoints.push(new Point(1.0, 20));
    speed.velocityOver.yBezier1 = yBezier;

    var zBezier: BezierData = new BezierData();
    zBezier.posPoints.push(new Point(0, 0));
    zBezier.posPoints.push(new Point(1, 0));
    zBezier.ctrlPoints.push(new Point(0, 0));
    zBezier.ctrlPoints.push(new Point(1, 0));
    speed.velocityOver.zBezier1 = zBezier;


    var colorOffset: ParticleDataColorOffset = new ParticleDataColorOffset();
    data.colorOffset = colorOffset;
    colorOffset.data.colors.push(new Color(255.0, 0.0, 0.0, 255.0));
    colorOffset.data.colors.push(new Color(0.0, 255.0, 0.0, 255.0));
    colorOffset.data.colors.push(new Color(0.0, 0.0, 255.0, 255.0));
    colorOffset.data.colors.push(new Color(0.0, 255.0, 0.0, 255.0));
    colorOffset.data.colors.push(new Color(255.0, 0.0, 0.0, 128.0));
    colorOffset.data.colors.push(new Color(255.0, 0.0, 0.0, 0.0));
    colorOffset.data.times.push(0.0);
    colorOffset.data.times.push(0.2);
    colorOffset.data.times.push(0.4);
    colorOffset.data.times.push(0.6);
    colorOffset.data.times.push(0.7);
    colorOffset.data.times.push(1.0);

    var sizeBezier: ParticleDataScaleBezier = new ParticleDataScaleBezier();
    data.scaleBezier = sizeBezier;

    sizeBezier.data.posPoints.push(new Point(0, 0));
    sizeBezier.data.posPoints.push(new Point(0.4, 2));
    sizeBezier.data.posPoints.push(new Point(0.4, 2));
    sizeBezier.data.posPoints.push(new Point(1.0, 0.2));

    sizeBezier.data.ctrlPoints.push(new Point(0, 1));
    sizeBezier.data.ctrlPoints.push(new Point(0.3, 2));
    sizeBezier.data.ctrlPoints.push(new Point(0.6, 2));
    sizeBezier.data.ctrlPoints.push(new Point(1.0, 0.2));

    data.validate();
    return data;
}

//创建一个材质球
private createMaterial(): MaterialBase {
    var mat: TextureMaterial = new TextureMaterial();
    mat.bothside = true;
    mat.ambientColor = 0xffffff;
    mat.blendMode = BlendMode.ADD;
    return mat;
}

显示结果如图：

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