private static Tristrip gpc_strip_ToTristrip(gpc_tristrip gpc_strip)
{
Tristrip tristrip = new Tristrip();
tristrip.NofStrips = gpc_strip.num_strips;
tristrip.Strip = new VertexList[tristrip.NofStrips];
IntPtr ptr = gpc_strip.strip;
for (int i = 0; i < tristrip.NofStrips; i++)
{
tristrip.Strip[i] = new VertexList();
gpc_vertex_list gpc_vtx_list = (gpc_vertex_list)Marshal.PtrToStructure(ptr, typeof(gpc_vertex_list));
tristrip.Strip[i].NofVertices = gpc_vtx_list.num_vertices;
tristrip.Strip[i].Vertex = new Vertex[tristrip.Strip[i].NofVertices];
IntPtr ptr2 = gpc_vtx_list.vertex;
for (int j = 0; j < tristrip.Strip[i].NofVertices; j++)
{
gpc_vertex gpc_vtx = (gpc_vertex)Marshal.PtrToStructure(ptr2, typeof(gpc_vertex));
tristrip.Strip[i].Vertex[j].X = gpc_vtx.x;
tristrip.Strip[i].Vertex[j].Y = gpc_vtx.y;
ptr2 = (IntPtr)(((int)ptr2) + Marshal.SizeOf(gpc_vtx));
}
ptr = (IntPtr)(((int)ptr) + Marshal.SizeOf(gpc_vtx_list));
}
return(tristrip);
}
public static Tristrip PolygonToTristrip(Polygon polygon)
{
gpc_tristrip gpc_strip = new gpc_tristrip();
gpc_polygon gpc_pol = GpcWrapper.PolygonTo_gpc_polygon(polygon);
gpc_polygon_to_tristrip(ref gpc_pol, ref gpc_strip);
Tristrip tristrip = GpcWrapper.gpc_strip_ToTristrip(gpc_strip);
GpcWrapper.Free_gpc_polygon(gpc_pol);
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 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;
}
private static TriStrip gpc_strip_ToTristrip(gpc_tristrip gpc_strip)
{
int numStrips = gpc_strip.num_strips;
TriStrip tristrip = new TriStrip(numStrips);
IntPtr ptr = gpc_strip.strip;
for (int i = 0; i < numStrips; ++i)
{
gpc_vertex_list gpc_vtx_list = (gpc_vertex_list)Marshal.PtrToStructure(ptr, typeof(gpc_vertex_list));
int numVertices = gpc_vtx_list.num_vertices;
tristrip[i].Capacity = numVertices;
IntPtr ptr2 = gpc_vtx_list.vertex;
for (int j = 0; j < numVertices; ++j)
{
gpc_vertex gpc_vtx = (gpc_vertex)Marshal.PtrToStructure(ptr2, typeof(gpc_vertex));
tristrip[i].Add(new Vec2d(gpc_vtx.x, gpc_vtx.y));
ptr2 = (IntPtr)(((int)ptr2) + Marshal.SizeOf(gpc_vtx));
}
ptr = (IntPtr)(((int)ptr) + Marshal.SizeOf(gpc_vtx_list));
}
return(tristrip);
}
private static extern void gpc_free_tristrip([In] ref gpc_tristrip tristrip);
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);
private static extern void gpc_polygon_to_tristrip([In] ref gpc_polygon polygon,
[In, Out] ref gpc_tristrip tristrip);
private static GpcTristrip gpc_strip_ToTristrip(gpc_tristrip gpc_strip)
{
GpcTristrip tristrip = new GpcTristrip();
tristrip.NofStrips = gpc_strip.num_strips;
tristrip.Strip = new GpcVertexList[tristrip.NofStrips];
IntPtr ptr = gpc_strip.strip;
for (int i = 0; i < tristrip.NofStrips; i++)
{
tristrip.Strip[i] = new GpcVertexList();
gpc_vertex_list gpc_vtx_list = (gpc_vertex_list)Marshal.PtrToStructure(ptr, typeof(gpc_vertex_list));
tristrip.Strip[i].NofVertices = gpc_vtx_list.num_vertices;
tristrip.Strip[i].Vertex = new GpcVertex[tristrip.Strip[i].NofVertices];
IntPtr ptr2 = gpc_vtx_list.vertex;
for (int j = 0; j < tristrip.Strip[i].NofVertices; j++)
{
gpc_vertex gpc_vtx = (gpc_vertex)Marshal.PtrToStructure(ptr2, typeof(gpc_vertex));
tristrip.Strip[i].Vertex[j].X = gpc_vtx.x;
tristrip.Strip[i].Vertex[j].Y = gpc_vtx.y;
ptr2 = (IntPtr)(((int)ptr2) + Marshal.SizeOf(gpc_vtx));
}
ptr = (IntPtr)(((int)ptr) + Marshal.SizeOf(gpc_vtx_list));
}
return tristrip;
}
public static GpcTristrip PolygonToTristrip(GpcPolygon polygon)
{
gpc_tristrip gpc_strip = new gpc_tristrip();
gpc_polygon gpc_pol = GpcWrapper.PolygonTo_gpc_polygon(polygon);
gpc_polygon_to_tristrip(ref gpc_pol, ref gpc_strip);
GpcTristrip tristrip = GpcWrapper.gpc_strip_ToTristrip(gpc_strip);
GpcWrapper.Free_gpc_polygon(gpc_pol);
GpcWrapper.gpc_free_tristrip(ref gpc_strip);
return tristrip;
}
public static extern void gpc_free_tristrip([In] ref gpc_tristrip tristrip);