//"1,1;2,2;3,3"
public static void Main(string[] args)
{
//args = new string[3];
//string ss = "0,0;0,1;1,1;1,0";
//string ss1 = "0,0;0,1;1,1;1,0";
//string ss2 = "0";
//args[0] = ss;
//args[1] = ss1;
//args[2] = ss2;
if (args?.Count() != 3)
{
return;
}
try
{
string[] ptStr1 = args[0].Split(';');
string[] ptStr2 = args[1].Split(';');
//0：相差 1：相交 2：异或 3：合并
GpcOperation operation = (GpcOperation)(int.Parse(args[2]));
//组织多边形A顶点数据
GpcWrapper.Polygon polygonA = new GpcWrapper.Polygon();
PointF[] aa = new PointF[ptStr1.Count()];
for (int i = 0; i < ptStr1.Count(); i++)
{
var subPtStr = ptStr1[i].Split(',');
aa[i] = new PointF(float.Parse(subPtStr[0]),
float.Parse(subPtStr[1]));
}
VertexList vtxA = new VertexList(aa);
polygonA.AddContour(vtxA, false);
//组织多边形B顶点数据
GpcWrapper.Polygon polygonB = new GpcWrapper.Polygon();
PointF[] bb = new PointF[ptStr2.Count()];
for (int i = 0; i < ptStr2.Count(); i++)
{
var subPtStr = ptStr2[i].Split(',');
bb[i] = new PointF(float.Parse(subPtStr[0]),
float.Parse(subPtStr[1]));
}
VertexList vtxB = new VertexList(bb);
polygonB.AddContour(vtxB, false);
//调用GPC库的剪辑算法
GpcWrapper.Polygon result = polygonA.Clip(operation, polygonB);
//组织返回结果字符串
if (result.Contour == null || result.Contour.Count() == 0)
{
Console.WriteLine("");
return;
}
string str = string.Join(";", result.Contour[0].Vertex);
str = str.Replace("(", string.Empty).Replace(")", string.Empty);
Console.WriteLine(str);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
public static Polygon Clip(GpcOperation operation, Polygon subject_polygon, Polygon clip_polygon)
{
gpc_polygon gpc_polygon = new gpc_polygon();
gpc_polygon gpc_subject_polygon = GpcWrapper.PolygonTo_gpc_polygon(subject_polygon);
gpc_polygon gpc_clip_polygon = GpcWrapper.PolygonTo_gpc_polygon(clip_polygon);
gpc_polygon_clip(operation, ref gpc_subject_polygon, ref gpc_clip_polygon, ref gpc_polygon);
Polygon polygon = GpcWrapper.gpc_polygon_ToPolygon(gpc_polygon);
GpcWrapper.Free_gpc_polygon(gpc_subject_polygon);
GpcWrapper.Free_gpc_polygon(gpc_clip_polygon);
GpcWrapper.gpc_free_polygon(ref gpc_polygon);
return(polygon);
}
public static Tristrip ClipToTristrip(GpcOperation operation, Polygon subject_polygon, Polygon clip_polygon)
{
gpc_tristrip gpc_strip = new gpc_tristrip();
gpc_polygon gpc_subject_polygon = GpcWrapper.PolygonTo_gpc_polygon(subject_polygon);
gpc_polygon gpc_clip_polygon = GpcWrapper.PolygonTo_gpc_polygon(clip_polygon);
gpc_tristrip_clip(operation, ref gpc_subject_polygon, ref gpc_clip_polygon, ref gpc_strip);
Tristrip tristrip = GpcWrapper.gpc_strip_ToTristrip(gpc_strip);
GpcWrapper.Free_gpc_polygon(gpc_subject_polygon);
GpcWrapper.Free_gpc_polygon(gpc_clip_polygon);
GpcWrapper.gpc_free_tristrip(ref gpc_strip);
return(tristrip);
}
public static Tristrip ClipToTristrip( GpcOperation operation, Polygon subject_polygon, Polygon clip_polygon )
{
gpc_tristrip gpc_strip = new gpc_tristrip();
gpc_polygon gpc_subject_polygon = GpcWrapper.PolygonTo_gpc_polygon( subject_polygon );
gpc_polygon gpc_clip_polygon = GpcWrapper.PolygonTo_gpc_polygon( clip_polygon );
gpc_tristrip_clip( operation, ref gpc_subject_polygon, ref gpc_clip_polygon, ref gpc_strip );
Tristrip tristrip = GpcWrapper.gpc_strip_ToTristrip( gpc_strip );
GpcWrapper.Free_gpc_polygon( gpc_subject_polygon );
GpcWrapper.Free_gpc_polygon( gpc_clip_polygon );
GpcWrapper.gpc_free_tristrip( ref gpc_strip );
return tristrip;
}
public static Polygon Clip( GpcOperation operation, Polygon subject_polygon, Polygon clip_polygon )
{
gpc_polygon gpc_polygon = new gpc_polygon();
gpc_polygon gpc_subject_polygon = GpcWrapper.PolygonTo_gpc_polygon( subject_polygon );
gpc_polygon gpc_clip_polygon = GpcWrapper.PolygonTo_gpc_polygon( clip_polygon );
gpc_polygon_clip( operation, ref gpc_subject_polygon, ref gpc_clip_polygon, ref gpc_polygon );
Polygon polygon = GpcWrapper.gpc_polygon_ToPolygon( gpc_polygon );
GpcWrapper.Free_gpc_polygon( gpc_subject_polygon );
GpcWrapper.Free_gpc_polygon( gpc_clip_polygon );
GpcWrapper.gpc_free_polygon( ref gpc_polygon );
return polygon;
}
private static extern void gpc_tristrip_clip([In] GpcOperation set_operation,
[In] ref gpc_polygon subject_polygon,
[In] ref gpc_polygon clip_polygon,
[In, Out] ref gpc_tristrip result_tristrip);
public Polygon Clip(GpcOperation operation, Polygon polygon)
{
return(GpcWrapper.Clip(operation, this, polygon));
}
public Tristrip ClipToTristrip(GpcOperation operation, Polygon polygon)
{
return(GpcWrapper.ClipToTristrip(operation, this, polygon));
}
private void DoOperation(GpcOperation op)
{
GeoPolygonRegion origin = this.m_PolyRegionDict[(int) this.ltvPolygon.CheckedItems[0].Tag];
try
{
switch (op)
{
case GpcOperation.Difference:
origin = this.m_PolyRegionExe.GetExcludeRegion(origin, this.m_PolyRegionDict[(int) this.ltvPolygon2.CheckedItems[0].Tag]);
goto Label_00A6;
case GpcOperation.Intersection:
origin = this.DoInsertOper(origin);
goto Label_00A6;
case GpcOperation.Union:
origin = this.DoCombineRegionOper(origin);
goto Label_00A6;
}
}
catch (Exception exception)
{
MessageBoxUtil.ShowError(exception.Message);
return;
}
Label_00A6:
if ((origin == null) || (origin.Count == 0))
{
MessageBoxUtil.ShowError(GISGlobalResourceEx.GIS_UI_UNINTERSECT_TIP);
}
else
{
this.m_PolyRegionDict.Add(origin.ID, origin);
this.TransformPolygonDict(origin.ID, origin);
this.m_PolygonIDList.Add(origin.ID);
ListViewItem item = new ListViewItem();
int num = this.m_PolygonIDList[this.m_PolygonIDList.Count - 1];
item.Tag = num;
item.Text = origin.Name;
this.ltvResult.Items.Add(item);
}
}
public GpcTristrip ClipToTristrip(GpcOperation operation, GpcPolygon polygon)
{
return GpcWrapper.ClipToTristrip(operation, this, polygon);
}
public static extern void gpc_polygon_clip([In] GpcOperation set_operation,
[In] ref gpc_polygon subject_polygon,
[In] ref gpc_polygon clip_polygon,
[In, Out] ref gpc_polygon result_polygon);
public Polygon Clip( GpcOperation operation, Polygon polygon )
{
return GpcWrapper.Clip( operation, this, polygon );
}