/// <summary>
/// <para>Check the specified vertex of the current <see cref="QuadNode"/>.</para>
/// </summary>
/// <param name="position">Position of the vertex.</param>
/// <param name="flag">Flag to enable/disable.</param>
private void CheckVertexAt(NodeVertex position, NodeContent flag, NodeSideVertex side)
{
if (this.IsDisabled(flag)//if the flag is not enabled
&& VertexTest(this.Vertices[(int)position].Value.Position, side, Camera.Camera.DefaultCamera.Transform.Translation))//and the vertex can be enabled...
this.EnableVertex(flag, position);
else if (this.IsEnabled(flag)//if the flag is enabled
&& !VertexTest(this.Vertices[(int)position].Value.Position, side, Camera.Camera.DefaultCamera.Transform.Translation))//and the vertex have to be disabled...
this.DisableVertex(flag, position);
}
/// <summary>
/// <para>Check the relevance of a vertex.</para>
/// </summary>
public bool VertexTest(Vector3 vertexPosition, NodeSideVertex side, Vector3 cameraPosition)
{
//get the distance between interpolated height position and real height position
float lengthToTest = this._realToInterpolatedVertexHeight[(int)side];
//get the distance from the camera position to the vertex position
float distanceCameraToPoint = Vector3.Distance(vertexPosition, cameraPosition);
//check with the threshold
return lengthToTest * this.ParentTree.VertexDetail > distanceCameraToPoint;
}
