public ParticleSystem setSpeedByComponentsRange(float speedMinX, float speedMaxX, float speedMinY, float speedMaxY) {
    mInitializers.add(new SpeeddByComponentsInitializer(dpToPx(speedMinX), dpToPx(speedMaxX),
            dpToPx(speedMinY), dpToPx(speedMaxY)));
    return this;
}
 

public ParticleSystem setSpeedByComponentsRange(float speedMinX, float speedMaxX, float speedMinY, float speedMaxY) {
	mInitializers.add(new SpeeddByComponentsInitializer(speedMinX, speedMaxX, speedMinY, speedMaxY));		
	return this;
}
 

/**
    * Initializes the speed components ranges that particles will be emitted. Speeds are
    * measured in density pixels per millisecond.
    * @param speedMinX The minimum speed in x direction.
    * @param speedMaxX The maximum speed in x direction.
    * @param speedMinY The minimum speed in y direction.
    * @param speedMaxY The maximum speed in y direction.
    * @return This.
    */
public ParticleSystem setSpeedByComponentsRange(float speedMinX, float speedMaxX, float speedMinY, float speedMaxY) {
       mInitializers.add(new SpeeddByComponentsInitializer(dpToPx(speedMinX), dpToPx(speedMaxX),
			dpToPx(speedMinY), dpToPx(speedMaxY)));
	return this;
}