72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
/*
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* This file is part of the ZoneMinder Project. See AUTHORS file for Copyright information
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "zm_catch2.h"
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#include "zm_poly.h"
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TEST_CASE("Polygon: default constructor") {
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Polygon p;
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REQUIRE(p.Area() == 0);
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REQUIRE(p.Centre() == Vector2(0, 0));
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}
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TEST_CASE("Polygon: construct from vertices") {
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std::vector<Vector2> vertices{{{0, 0}, {6, 0}, {0, 6}}};
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Polygon p(vertices);
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REQUIRE(p.Area() == 18);
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REQUIRE(p.Extent().Size() == Vector2(6, 6));
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}
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TEST_CASE("Polygon: clipping") {
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// This a concave polygon in a shape resembling a "W"
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std::vector<Vector2> v = {
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{3, 1},
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{5, 1},
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{6, 3},
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{7, 1},
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{9, 1},
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{10, 8},
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{8, 8},
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{7, 5},
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{5, 5},
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{4, 8},
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{2, 8}
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};
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Polygon p(v);
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REQUIRE(p.GetVertices().size() == 11);
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REQUIRE(p.Extent().Size() == Vector2(8, 7));
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SECTION("boundary box larger than polygon") {
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p.Clip(Box({1, 0}, {11, 9}));
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REQUIRE(p.GetVertices().size() == 11);
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REQUIRE(p.Extent().Size() == Vector2(8, 7));
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}
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SECTION("boundary box smaller than polygon") {
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p.Clip(Box({2, 4}, {10, 7}));
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REQUIRE(p.GetVertices().size() == 8);
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REQUIRE(p.Extent().Size() == Vector2(8, 3));
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}
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}
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