Type Alias VelocityOverLifetime

VelocityOverLifetime: {
    isActive: boolean;
    linear: {
        x?: Constant | RandomBetweenTwoConstants | LifetimeCurve;
        y?: Constant | RandomBetweenTwoConstants | LifetimeCurve;
        z?: Constant | RandomBetweenTwoConstants | LifetimeCurve;
    };
    orbital: {
        x?: Constant
        | RandomBetweenTwoConstants
        | LifetimeCurve;
        y?: Constant | RandomBetweenTwoConstants | LifetimeCurve;
        z?: Constant | RandomBetweenTwoConstants | LifetimeCurve;
    };
}

Defines the velocity of particles over their lifetime, allowing for linear and orbital velocity (in degrees) adjustments. Supports constant values, random ranges, or curves (Bézier or easing) for each axis.

Type declaration

Default

isActive: false
linear: { x: 0.0, y: 0.0, z: 0.0 }
orbital: { x: 0.0, y: 0.0, z: 0.0 }

Example

// Linear velocity with a constant value
linear: { x: 1, y: 0, z: -0.5 };

// Linear velocity with random ranges
linear: {
  x: { min: -1, max: 1 },
  y: { min: 0, max: 2 }
};

// Linear velocity using a Bézier curve
linear: {
  z: {
    type: 'bezier',
    bezierPoints: [
      { x: 0, y: 0, percentage: 0 },
      { x: 0.5, y: 2 },
      { x: 1, y: 10, percentage: 1 }
    ],
    scale: 2
  }
};

// Orbital velocity with a constant value
orbital: { x: 3, y: 5, z: 0 };

// Orbital velocity using an easing curve
orbital: {
  x: {
    type: 'easing',
    curveFunction: (time) => Math.sin(time * Math.PI),
    scale: 1.5
  }
};

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