Axiom.Core.BillboardSet.IsBillboardVisible C# (CSharp) Method

		protected bool IsBillboardVisible( Camera camera, Billboard billboard )
		{
			// if not culling each one, return true always
			if ( !this.cullIndividual )
			{
				return true;
			}

			// get the world matrix of this billboard set
			this.GetWorldTransforms( this.world );

			// get the center of the bounding sphere
			this.sphere.Center = this.world[ 0 ] * billboard.Position;

			// calculate the radius of the bounding sphere for the billboard
			if ( billboard.HasOwnDimensions )
			{
				this.sphere.Radius = Utility.Max( billboard.Width, billboard.Height );
			}
			else
			{
				this.sphere.Radius = Utility.Max( this.defaultParticleWidth, this.defaultParticleHeight );
			}

			// finally, see if the sphere is visible in the camera
			return camera.IsObjectVisible( this.sphere );
		}