public static void DrawExtent(this SpriteBatch spriteBatch, IExtent extent, Color color, Matrix transformFromWorldToCamera)
{
ICompositeExtent composite = extent as ICompositeExtent;
if (null != composite)
{
DrawCompositeExtent(spriteBatch, composite, color, transformFromWorldToCamera);
return;
}
IPolygonExtent poly = extent as IPolygonExtent;
if (null != poly)
{
DrawPolygon(spriteBatch, poly, color, transformFromWorldToCamera);
return;
}
ICircularExtent circle = extent as ICircularExtent;
if (null != circle)
{
DrawCircle(spriteBatch, circle, color, transformFromWorldToCamera);
return;
}
throw new NotImplementedException("can only draw extents that are either polygons or circles");
}
public static bool AreInIntersectionExtentVsExtent(IPolygonExtent a, IExtent b)
{
ICompositeExtent composite = b as ICompositeExtent;
if (null != composite)
{
return(a.Intersects(composite));
}
composite = a as ICompositeExtent;
if (null != composite)
{
return(b.Intersects(composite));
}
ICircularExtent circle = b as ICircularExtent;
if (null != circle)
{
_tempCircleB.Reset(b);
return(circle.Intersects(_tempCircleB));
}
IPolygonExtent polygon = b as IPolygonExtent;
if (null != polygon)
{
return(a.Intersects(polygon));
}
throw new InvalidOperationException("Extent must be a circle or polygon");
}
public bool Intersects(IExtent other)
{
if (null == other)
{
return(false);
}
ICompositeExtent composite = other as ICompositeExtent;
if (null != composite)
{
return(Intersects(composite));
}
IPolygonExtent polygon = other as IPolygonExtent;
if (null != polygon)
{
return(Intersects(polygon));
}
ICircularExtent circle = other as ICircularExtent;
if (null != circle)
{
return(Intersects(circle));
}
throw new NotImplementedException("otherExtent must be either circle or polygon");
}
public override bool Intersects(ICompositeExtent other)
{
foreach (var child in Items)
{
if (child.Intersects(other))
{
return(true);
}
}
return(false);
}
private static void DrawCompositeExtent(this SpriteBatch spriteBatch, ICompositeExtent extent, Color color, Matrix transformFromWorldToCamera)
{
//for( int i = 0; i < extent.ReferenceRegion.NumSides; i++ )
//{
// _extentTraceVertices[ i ] = Vector2.Transform( extent.ReferenceRegion.Vertices[ i ], extent.TranslateFrom );
//}
//spriteBatch.DrawPolygon( _extentTraceVertices, extent.NumSides, color, transformFromWorldToCamera );
foreach (var child in extent.Items)
{
DrawExtent(spriteBatch, child, color, transformFromWorldToCamera);
}
}
public override bool Intersects(ICompositeExtent other)
{
return(other.Intersects(this));
}
private static void DrawCompositeExtent(this SpriteBatch spriteBatch, ICompositeExtent extent, Color color)
{
DrawCompositeExtent(spriteBatch, extent, color, Matrix.Identity);
}
public abstract bool Intersects(ICompositeExtent other);
