/// <summary>
/// Subtracts one polygon from another.
/// </summary>
/// <param name="polygon1">The base polygon.</param>
/// <param name="polygon2">The polygon to subtract from the base.</param>
/// <param name="subtract">The result of the polygon subtraction</param>
/// <returns>error code</returns>
public static PolygonUtil.PolyUnionError PolygonSubtract(Point2DList polygon1, Point2DList polygon2, out Point2DList subtract)
{
PolygonOperationContext ctx = new PolygonOperationContext();
ctx.Init(PolygonUtil.PolyOperation.Subtract, polygon1, polygon2);
PolygonSubtractInternal(ctx);
subtract = ctx.Subtract;
return ctx.mError;
}
/// <summary>
/// Performs one or more polygon operations on the 2 provided polygons
/// </summary>
/// <param name="polygon1">The first polygon.</param>
/// <param name="polygon2">The second polygon</param>
/// <param name="subtract">The result of the polygon subtraction</param>
/// <returns>error code</returns>
public static PolygonUtil.PolyUnionError PolygonOperation(PolygonUtil.PolyOperation operations, Point2DList polygon1, Point2DList polygon2, out Dictionary<uint, Point2DList> results)
{
PolygonOperationContext ctx = new PolygonOperationContext();
ctx.Init(operations, polygon1, polygon2);
results = ctx.mOutput;
return PolygonUtil.PolygonOperation(ctx);
}
/// Merges two polygons, given that they intersect.
/// </summary>
/// <param name="polygon1">The first polygon.</param>
/// <param name="polygon2">The second polygon.</param>
/// <param name="union">The union of the two polygons</param>
/// <returns>The error returned from union</returns>
public static PolygonUtil.PolyUnionError PolygonUnion(Point2DList polygon1, Point2DList polygon2, out Point2DList union)
{
PolygonOperationContext ctx = new PolygonOperationContext();
ctx.Init(PolygonUtil.PolyOperation.Union, polygon1, polygon2);
PolygonUnionInternal(ctx);
union = ctx.Union;
return ctx.mError;
}