A ParticleEmitter that emits particles from a circle.
Particles will be positioned within a circle and have initial velocities going along the z vector.
    
| Name | Type | Default | Description | 
|---|---|---|---|
| radius | Number | 1.0 | optional The radius of the circle in meters. | 
Members
    The angle of the cone in radians.
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    Default Value:
    
Cesium.Math.toRadians(30.0)
    
    
    
    
    
    
    
    The radius of the circle in meters.
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    Default Value:
    
1.0
    
    
    
    
    
    
    
