Primitives represent objects rendered in the 3D scene.
  AutomaticallyComputeBoundingSphere | Gets or sets if the primitive's Bounding Sphere is automatically computed. | 
  BoundingSphere | Gets or sets the bounding sphere that encompasses the primitive. The center is defined in the primitive's Reference Frame. | 
  Color | Gets or sets the primitive's color. | 
  Display | Gets or sets if the primitive should be rendered. Both this and Display Condition must evaluate to true for the primitive to be rendered. | 
  DisplayCondition | Gets or sets the display condition that determines if the primitive should be rendered. Both this and Display must evaluate to true for the primitive to be rendered. | 
  ReferenceFrame | Gets or sets the reference frame this primitive is defined and rendered in. | 
  Tag | Gets or sets custom value associated with this primitive. | 
  Translucency | Gets or sets the primitive's translucency. Translucency is between 0 and 1, where 0 is opaque and 1 is transparent. | 





