started working on 3D building stuff

wifi/estimate/ray3/FloorplanMesh.h

@@ -0,0 +1,48 @@
+#ifndef FLOORPLANMESH_H
+#define FLOORPLANMESH_H
+
+#include "Obstacle3.h"
+
+/**
+ * meshed version of the floorplan
+ */
+struct FloorplanMesh {
+
+	std::vector<Obstacle3D> elements;
+
+	/** DEBUG: convert to .obj file code for exporting */
+	std::string toOBJ() {
+
+		int nVerts = 1;
+		int nObjs = 0;
+		std::string res;
+
+		// write each obstacle
+		for (const Obstacle3D& o : elements) {
+
+			// write the vertices
+			for (const Triangle3& t : o.triangles) {
+				res += "v " + std::to_string(t.p1.x) + " " + std::to_string(t.p1.y) + " " + std::to_string(t.p1.z) + "\n";
+				res += "v " + std::to_string(t.p2.x) + " " + std::to_string(t.p2.y) + " " + std::to_string(t.p2.z) + "\n";
+				res += "v " + std::to_string(t.p3.x) + " " + std::to_string(t.p3.y) + " " + std::to_string(t.p3.z) + "\n";
+			}
+
+			// create a new group
+			res += "g elem_" + std::to_string(++nObjs) + "\n";
+
+			// write the group's faces
+			for (size_t i = 0; i < o.triangles.size(); ++i) {
+				res += "f " + std::to_string(nVerts+0) + " " + std::to_string(nVerts+1) + " " + std::to_string(nVerts+2) + "\n";
+				nVerts += 3;
+			}
+
+		}
+
+		// done
+		return res;
+
+	}
+
+};
+
+#endif // FLOORPLANMESH_H