many changes :P

mapview/3D/misc/Polygon.h

@@ -0,0 +1,109 @@
+#ifndef POLYGON_H
+#define POLYGON_H
+
+#include <Indoor/floorplan/v2/Floorplan.h>
+#include "../../../lib/gpc/gpc.h"
+
+class Polygon {
+
+	struct GPCPolygon : gpc_polygon {
+		GPCPolygon() {
+//			contour = (gpc_vertex_list*) calloc(0, 1024);
+//			contour->num_vertices = 0;
+//			contour->vertex = (gpc_vertex*) calloc(0, 1024);
+//			hole = (int*) calloc(0, 1024);
+			num_contours = 0;
+			contour = nullptr;
+			hole = nullptr;
+		}
+		~GPCPolygon() {
+			if (contour) {
+				gpc_free_polygon(this);
+				//free(contour->vertex); contour->vertex = nullptr;
+			}
+			free(contour); contour = nullptr;
+			free(hole); hole = nullptr;
+
+		}
+		GPCPolygon& operator = (const GPCPolygon& o) = delete;
+		GPCPolygon& operator = (GPCPolygon& o) {
+			this->contour = o.contour;
+			this->hole = o.hole;
+			this->num_contours = o.num_contours;
+			o.contour = nullptr;
+			o.hole = nullptr;
+			return *this;
+		}
+	};
+
+private:
+
+	GPCPolygon state;
+
+public:
+
+	void add(const Floorplan::Polygon2& poly) {
+		GPCPolygon cur = toGPC(poly);
+		//GPCPolygon out;
+		gpc_polygon_clip(GPC_UNION, &state, &cur, &state);
+		//state = out;
+	}
+
+	void remove(const Floorplan::Polygon2& poly) {
+		GPCPolygon cur = toGPC(poly);
+		//GPCPolygon out;
+		gpc_polygon_clip(GPC_DIFF, &state, &cur, &state);
+		//state = out;
+	}
+
+	std::vector<std::vector<Point3>> get(float z) {
+
+		gpc_tristrip res;
+		res.num_strips = 0;
+		res.strip = nullptr;
+
+		//res.strip = (gpc_vertex_list*) malloc(1024);
+		gpc_polygon_to_tristrip(&state, &res);
+
+		std::vector<std::vector<Point3>> trias;
+
+		for (int i = 0; i < res.num_strips; ++i) {
+			gpc_vertex_list lst = res.strip[i];
+			std::vector<Point3> tria;
+			for (int j = 0; j < lst.num_vertices; ++j) {
+				gpc_vertex& vert = lst.vertex[j];
+				Point3 p3(vert.x, vert.y, z);
+				tria.push_back(p3);
+			}
+			trias.push_back(tria);
+		}
+
+		gpc_free_tristrip(&res);
+
+		return std::move(trias);
+
+	}
+
+private:
+
+	GPCPolygon toGPC(Floorplan::Polygon2 poly) {
+
+		std::vector<gpc_vertex> verts;
+		for (Point2 p2 : poly.points) {
+			gpc_vertex vert; vert.x = p2.x; vert.y = p2.y;
+			verts.push_back(vert);
+		}
+
+		GPCPolygon gpol;
+		gpc_vertex_list list;
+		list.num_vertices = verts.size();
+		list.vertex = verts.data();
+		gpc_add_contour(&gpol, &list, 0);
+
+		return gpol;
+
+	}
+
+};
+
+#endif // POLYGON_H