protected override void Update()
{
// return if no lighthouse was selected since last update
if (m_selectedLighthouse == null)
{
return;
}
// get current mouseposition
var worldlocation = Camera.main.ScreenPointToRay(Input.mousePosition).origin;
worldlocation.z = -2f;
// move lighthouse to mouse position
// will update visibility polygon
m_selectedLighthouse.Pos = worldlocation;
// see if lighthouse was released
if (Input.GetMouseButtonUp(0))
{
//check whether lighthouse is over the island
if (!LevelPolygon.ContainsInside(m_selectedLighthouse.Pos))
{
// destroy the lighthouse
m_solution.RemoveLighthouse(m_selectedLighthouse);
Destroy(m_selectedLighthouse.gameObject);
UpdateLighthouseText();
}
// lighthouse no longer selected
m_selectedLighthouse = null;
CheckSolution();
}
}
/// <summary>
/// Builds a list of Edge objects from a LevelPolygon
/// </summary>
private static IList<Edge> BuildPolygonEdgeList( LevelPolygon poly )
{
List< Edge > edges = new List< Edge >( poly.Edges.Length );
for ( int edgeIndex = 0; edgeIndex < edges.Count; ++edgeIndex )
{
LevelEdge srcEdge = poly.Edges[ edgeIndex ];
edges[ edgeIndex ] = new Edge( srcEdge );
}
return edges;
}
/// <summary>
/// Combines two polygons together using a CSG operator. Returns a BSP tree for the result polygon
/// </summary>
public static Node Combine( LevelPolygon poly1, LevelPolygon poly2, Operation op )
{
IList< Edge > poly1Edges = BuildPolygonEdgeList( poly1 );
IList< Edge > poly2Edges = BuildPolygonEdgeList( poly2 );
Node poly1Root = BuildNode( poly1Edges );
Node poly2Root = BuildNode( poly2Edges );
List< Edge > sourceEdges = new List< Edge >( );
switch ( op )
{
case Operation.Union :
{
ClipEdges( poly1Root, poly2Edges, true, false, sourceEdges );
ClipEdges( poly2Root, poly1Edges, true, false, sourceEdges );
break;
}
case Operation.Intersection :
{
ClipEdges( poly1Root, poly2Edges, false, true, sourceEdges );
ClipEdges( poly2Root, poly1Edges, false, true, sourceEdges );
break;
}
case Operation.Complement :
{
ClipEdges( poly1Root, poly2Edges, false, true, sourceEdges );
ClipEdges( poly2Root, poly1Edges, false, true, sourceEdges );
break;
}
}
return BuildNode( sourceEdges );
}
