initial version

floorplan/FloorplanFactorySVG.h

@@ -0,0 +1,138 @@
+#ifndef FLOORPLANFACTORYSVG_H
+#define FLOORPLANFACTORYSVG_H
+
+#include "Floor.h"
+#include <string>
+#include "../Exception.h"
+
+#include <KLib/gfx/svg/SVGLoader.h>
+
+/**
+ * load floorplans from SVG files
+ */
+class FloorplanFactorySVG {
+
+	/**
+	 * helper class for SVG floorplans.
+	 *
+	 * converts between the SVG's scale and real-world scale
+	 */
+	class SVGScaler {
+
+	private:
+
+		/** the scaling factor to apply to the svg data */
+		const double scalingFactor;
+
+	public:
+
+		/** ctor */
+		SVGScaler(const double scalingFactor) : scalingFactor(scalingFactor) {
+			;
+		}
+
+		/** scale (x, y) into (_x, _y) */
+		void scale(const double x, const double y, double& _x, double& _y) const {
+			_x = x * scalingFactor;
+			_y = y * scalingFactor;
+		}
+
+		/** scale the given point into a new output point */
+		K::Point scale(const K::Point p) const {
+			K::Point ret;
+			scale (p.x, p.y, ret.x, ret.y);
+			return ret;
+		}
+
+		/** scale the given line into a new output line */
+		Line2D scale(const K::Line l) const {
+			Line2D ret;
+			scale (l.p1.x, l.p1.y, ret.p1.x, ret.p1.y);
+			scale (l.p2.x, l.p2.y, ret.p2.x, ret.p2.y);
+			return ret;
+		}
+
+	};
+
+private:
+
+	K::SVGFile svg;
+	SVGScaler scaler;
+	double width;
+	double depth;
+
+public:
+
+	/** ctor with svg filename and scaling factor */
+	FloorplanFactorySVG(const std::string& file, const float scaling) : scaler(scaling) {
+
+		// load the SVG
+		K::SVGLoader::load(K::File(file), &svg);
+		scaler.scale(svg.getWidth(), svg.getHeight(), width, depth);
+
+	}
+
+	/** get the width of the building */
+	float getWidth() const {return width;}
+
+	/** get the depth of the building */
+	float getDepth() const {return depth;}
+
+	/** get the floor identified by the given layer name */
+	Floor getFloor(const std::string layerName) {
+
+		// get the requested SVG layer
+		K::SVGComposite* sc = svg.getLayers();
+		K::SVGLayer* layer = sc->getContainedLayerNamed(layerName);
+		if (!layer) {throw Exception("SVG has no layer named '" + layerName + "'");}
+
+		// create and parse the new floor
+		Floor floor(width, depth);
+		load(layer, floor);
+		return floor;
+
+
+	}
+
+private:
+
+	/** recursive loading/parsing of nested SVG elements */
+	void load(K::SVGElement* el, Floor& floor) {
+
+		switch (el->getType()) {
+
+			case SVGElementType::COMPOSITE: {
+				for (K::SVGElement* sub : ((K::SVGComposite*)el)->getChilds()) {
+					load(sub, floor);
+				}
+				break;
+			}
+
+			case SVGElementType::LAYER: {
+				K::SVGLayer* layer = (K::SVGLayer*) el;
+				for (K::SVGElement* sub : layer->getChilds()) {
+					load(sub, floor);
+				}
+				break;
+			}
+
+			case SVGElementType::PATH: {
+				for (const K::Line& line : ((K::SVGPath*)el)->getLines()) {
+					floor.addObstacle( scaler.scale(line) );
+				}
+				break;
+			}
+
+			case SVGElementType::TEXT: {
+				break;
+			}
+
+			default:
+				throw "should not happen!";
+
+		}
+	}
+
+};
+
+#endif // FLOORPLANFACTORYSVG_H