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/** @file
* @brief Unit tests for EllipticalArc.
* Uses the Google Testing Framework
*//*
* Authors:
* Krzysztof Kosiński <tweenk.pl@gmail.com>
*
* Copyright 2015 Authors
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*/
#include "testing.h"
#include <2geom/elliptical-arc.h>
#include <glib.h>
using namespace Geom;
TEST(EllipticalArcTest, PointAt) {
EllipticalArc a(Point(0,0), Point(10,20), M_PI/2, false, true, Point(-40,0));
EXPECT_near(a.pointAt(0), a.initialPoint(), 1e-14);
EXPECT_near(a.pointAt(1), a.finalPoint(), 1e-14);
EXPECT_near(a.pointAt(0.5), Point(-20,10), 1e-14);
EllipticalArc b(Point(0,0), Point(10,20), 0, false, true, Point(-40,0));
EXPECT_near(b.pointAt(0), b.initialPoint(), 1e-14);
EXPECT_near(b.pointAt(1), b.finalPoint(), 1e-14);
EXPECT_near(b.pointAt(0.5), Point(-20,40), 1e-14);
EllipticalArc c(Point(200,0), Point(40,20), Angle::from_degrees(90), false, false, Point(200,100));
EXPECT_near(c.pointAt(0), c.initialPoint(), 1e-13);
EXPECT_near(c.pointAt(1), c.finalPoint(), 1e-13);
EXPECT_near(c.pointAt(0.5), Point(175, 50), 1e-13);
}
TEST(EllipticalArc, Transform) {
EllipticalArc a(Point(0,0), Point(10,20), M_PI/2, false, true, Point(-40,0));
EllipticalArc b(Point(-40,0), Point(10,20), M_PI/2, false, true, Point(0,0));
EllipticalArc c = a;
Affine m = Rotate::around(Point(-20,0), M_PI);
c.transform(m);
for (unsigned i = 0; i <= 100; ++i) {
Coord t = i/100.;
EXPECT_near(c.pointAt(t), b.pointAt(t), 1e-12);
EXPECT_near(a.pointAt(t)*m, c.pointAt(t), 1e-12);
}
}
TEST(EllipticalArcTest, Duplicate) {
EllipticalArc a(Point(0,0), Point(10,20), M_PI/2, true, false, Point(-40,0));
EllipticalArc *b = static_cast<EllipticalArc*>(a.duplicate());
EXPECT_EQ(a, *b);
delete b;
}
TEST(EllipticalArcTest, LineSegmentIntersection) {
std::vector<CurveIntersection> r1;
EllipticalArc a3(Point(0,0), Point(5,1.5), 0, true, true, Point(0,2));
LineSegment ls(Point(0,5), Point(7,-3));
r1 = a3.intersect(ls);
EXPECT_EQ(r1.size(), 2u);
EXPECT_intersections_valid(a3, ls, r1, 1e-10);
}
TEST(EllipticalArcTest, ArcIntersection) {
std::vector<CurveIntersection> r1, r2;
EllipticalArc a1(Point(0,0), Point(6,3), 0.1, false, false, Point(10,0));
EllipticalArc a2(Point(0,2), Point(6,3), -0.1, false, true, Point(10,2));
r1 = a1.intersect(a2);
EXPECT_EQ(r1.size(), 2u);
EXPECT_intersections_valid(a1, a2, r1, 1e-10);
EllipticalArc a3(Point(0,0), Point(5,1.5), 0, true, true, Point(0,2));
EllipticalArc a4(Point(3,5), Point(5,1.5), M_PI/2, true, true, Point(5,0));
r2 = a3.intersect(a4);
EXPECT_EQ(r2.size(), 3u);
EXPECT_intersections_valid(a3, a4, r2, 1e-10);
}
TEST(EllipticalArcTest, BezierIntersection) {
std::vector<CurveIntersection> r1, r2;
EllipticalArc a3(Point(0,0), Point(1.5,5), M_PI/2, true, true, Point(0,2));
CubicBezier bez1(Point(0,3), Point(7,3), Point(0,-1), Point(7,-1));
r1 = a3.intersect(bez1);
EXPECT_EQ(r1.size(), 2u);
EXPECT_intersections_valid(a3, bez1, r1, 1e-10);
EllipticalArc a4(Point(3,5), Point(5,1.5), 3*M_PI/2, true, true, Point(5,5));
CubicBezier bez2(Point(0,5), Point(10,-4), Point(10,5), Point(0,-4));
r2 = a4.intersect(bez2);
EXPECT_EQ(r2.size(), 4u);
EXPECT_intersections_valid(a4, bez2, r2, 1e-10);
}
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