/*
 * © Copyright 2014 – Urheberrechtshinweis
 * Alle Rechte vorbehalten / All Rights Reserved
 *
 * Programmcode ist urheberrechtlich geschuetzt.
 * Das Urheberrecht liegt, soweit nicht ausdruecklich anders gekennzeichnet, bei Frank Ebner.
 * Keine Verwendung ohne explizite Genehmigung.
 * (vgl. § 106 ff UrhG / § 97 UrhG)
 */

#ifndef FLOORPLAN_3D_TUBE_H
#define FLOORPLAN_3D_TUBE_H


#include "../../../math/Matrix4.h"
#include "Mesh.h"

namespace Floorplan3D {

	/** walled cylinder */
	class Tube : public Mesh {

	public:

		/** ctor */
		Tube() {
			;
		}


		/** get a transformed version */
		Tube transformed(const Matrix4& mat) const {
			Tube res = *this;
			res.transform(mat);
			return res;
		}

		/** build */
		void addSegment(const float from_deg, const float to_deg, const float rInner, const float rOuter, const float h, bool closeSides, bool topAndBottom) {

			const int tiles = 32;
			const float deg_per_tile = 360.0f / tiles;
			const float rad_per_tile = deg_per_tile / 180.0f * M_PI;
			const int startTile = std::round(from_deg / deg_per_tile);
			const int endTile = std::round(to_deg / deg_per_tile);

			for (int i = startTile; i < endTile; ++i) {

				const float startRad = (i+0) * rad_per_tile;
				const float endRad = (i+1) * rad_per_tile;

				const float xo0 = std::cos(startRad) * rOuter;
				const float yo0 = std::sin(startRad) * rOuter;
				const float xo1 = std::cos(endRad) * rOuter;
				const float yo1 = std::sin(endRad) * rOuter;

				const float xi0 = std::cos(startRad) * rInner;
				const float yi0 = std::sin(startRad) * rInner;
				const float xi1 = std::cos(endRad) * rInner;
				const float yi1 = std::sin(endRad) * rInner;

				if (closeSides) {

					// close start of segment
					if (i == startTile) {
						addQuad(
							Point3(xi0, yi0, -h),
							Point3(xo0, yo0, -h),
							Point3(xo0, yo0, +h),
							Point3(xi0, yi0, +h)
						);
					}

					// close end of segment
					if (i == endTile-1) {
						addQuad(
							Point3(xi1, yi1, +h),
							Point3(xo1, yo1, +h),
							Point3(xo1, yo1, -h),
							Point3(xi1, yi1, -h)
						);
					}

				}

				// outer
				addQuad(
					Point3(xo0, yo0, -h),
					Point3(xo1, yo1, -h),
					Point3(xo1, yo1, +h),
					Point3(xo0, yo0, +h)
				);

				// innser
				addQuad(
					Point3(xi0, yi0, +h),
					Point3(xi1, yi1, +h),
					Point3(xi1, yi1, -h),
					Point3(xi0, yi0, -h)
				);

				if (topAndBottom) {

					// top
					addQuad(
						Point3(xi0, yi0, h),
						Point3(xo0, yo0, h),
						Point3(xo1, yo1, h),
						Point3(xi1, yi1, h)
					);

					// bottom
					addQuad(
						Point3(xi1, yi1, -h),
						Point3(xo1, yo1, -h),
						Point3(xo0, yo0, -h),
						Point3(xi0, yi0, -h)
					);

				}

			}

		}



	};

}

#endif // FLOORPLAN_3D_TUBE_H