/*
 * © 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)
 */

#include "../../../fixC11.h"

#include "Handrail.h"

#include <Indoor/geo/Point3.h>
#include "Shader.h"

Handrail::Handrail(const Point2 from, const Point2 to, float atHeight, float height) :
	from(from), to(to), atHeight(atHeight), height(height) {

	;

}

void Handrail::render(const RenderSettings& rs) {

	rs.shader->bind();
	rs.shader->setColor(0.8, 0.8, 0.8);
	rs.shader->setModelMatrix(QMatrix4x4());

	const float z1 = atHeight;
	const float z2 = atHeight + height;

	// polygon edges
	Point3 p1 = Point3(from.x, from.y, z1);
	Point3 p2 = Point3(to.x, to.y, z1);

	Point3 p3 = Point3(from.x, from.y, z2);
	Point3 p4 = Point3(to.x, to.y, z2);

	std::vector<float> vertices;

	// top
	vertices.insert( vertices.end(), {p3.x, p3.y, p3.z} );
	vertices.insert( vertices.end(), {p4.x, p4.y, p4.z} );

	// start bar
	vertices.insert( vertices.end(), {p1.x, p1.y, p1.z} );
	vertices.insert( vertices.end(), {p3.x, p3.y, p3.z} );

	// end bar
	vertices.insert( vertices.end(), {p2.x, p2.y, p2.z} );
	vertices.insert( vertices.end(), {p4.x, p4.y, p4.z} );

	// intermediate bars
	const Point3 d1 = p2-p1;
	const Point3 d2 = p4-p3;
	const int numBars = d2.length() / 1;
	for (int i = 1; i < numBars; ++i) {
		const Point3 s = p1 + d1 * i / numBars;
		const Point3 e = p3 + d2 * i / numBars;
		vertices.insert( vertices.end(), {s.x, s.y, s.z} );
		vertices.insert( vertices.end(), {e.x, e.y, e.z} );
	}

	rs.shader->setVertices(vertices.data());
    rs.funcs->glDrawArrays(GL_LINES, 0, vertices.size() / 3);
	rs.shader->unsetVertices();

	rs.shader->release();

	/*

	TODO_GL

	glDisable(GL_LIGHTING);
	glBegin(GL_LINES);

		glColor3f(0.9, 0.9, 0.9);

		// top
		glVertex3f(p3.x, p3.y, p3.z);
		glVertex3f(p4.x, p4.y, p4.z);

		// start bar
		glVertex3f(p1.x, p1.y, p1.z);
		glVertex3f(p3.x, p3.y, p3.z);

		// end bar
		glVertex3f(p2.x, p2.y, p2.z);
		glVertex3f(p4.x, p4.y, p4.z);

		glColor3f(0.6, 0.6, 0.6);

		// intermediate bars
		const Point3 d1 = p2-p1;
		const Point3 d2 = p4-p3;
		const int numBars = d2.length() / 1;
		for (int i = 1; i < numBars; ++i) {
			const Point3 s = p1 + d1 * i / numBars;
			const Point3 e = p3 + d2 * i / numBars;
			glVertex3f(s.x, s.y, s.z);
			glVertex3f(e.x, e.y, e.z);
		}

	glEnd();
	glEnable(GL_LIGHTING);

	*/



}