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107 lines
3.1 KiB
C++
107 lines
3.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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/// OpenGL Mathematics (glm.g-truc.net)
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///
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/// Copyright (c) 2015 G-Truc Creation (www.g-truc.net)
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/// Permission is hereby granted, free of charge, to any person obtaining a copy
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/// of this software and associated documentation files (the "Software"), to deal
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/// in the Software without restriction, including without limitation the rights
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/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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/// copies of the Software, and to permit persons to whom the Software is
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/// furnished to do so, subject to the following conditions:
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///
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/// The above copyright notice and this permission notice shall be included in
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/// all copies or substantial portions of the Software.
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///
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/// Restrictions:
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/// By making use of the Software for military purposes, you choose to make
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/// a Bunny unhappy.
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///
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/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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/// THE SOFTWARE.
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///
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/// @file test/gtx/gtx_area.cpp
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/// @date 2015-09-27
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/// @author Jesse Talavera-Greenberg
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///////////////////////////////////////////////////////////////////////////////////
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#include <glm/gtx/area.hpp>
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#include <glm/vec2.hpp>
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#include <glm/gtc/epsilon.hpp>
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using namespace glm;
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const float EPSILON = epsilon<float>();
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int test_triangle_area_zero() {
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int Error(0);
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vec2 a(0, 0), b(0, 0), c(0, 0);
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Error += epsilonEqual(area(a, b, c), 0.0f, EPSILON) ? 0 : 1;
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return Error;
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}
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int test_triangle_area_clockwise_negative() {
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int Error(0);
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vec2 a(0, 1), b(-1, 0), c(1, 0);
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// Upward-facing triangle at the origin
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Error += epsilonEqual(area(a, c, b), -1.0f, EPSILON) ? 0 : 1;
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Error += epsilonEqual(area(b, a, c), -1.0f, EPSILON) ? 0 : 1;
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Error += epsilonEqual(area(c, b, a), -1.0f, EPSILON) ? 0 : 1;
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return Error;
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}
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int test_triangle_area_anticlockwise_positive() {
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int Error(0);
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vec2 a(0, 1), b(-1, 0), c(1, 0);
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Error += epsilonEqual(area(a, b, c), 1.0f, EPSILON) ? 0 : 1;
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Error += epsilonEqual(area(b, c, a), 1.0f, EPSILON) ? 0 : 1;
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Error += epsilonEqual(area(c, a, b), 1.0f, EPSILON) ? 0 : 1;
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return Error;
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}
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int test_triangle_area_collinear() {
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int Error(0);
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vec2 a(-1, 0), b(0, 0), c(1, 0);
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Error += epsilonEqual(area(a, b, c), 0.0f, EPSILON) ? 0 : 1;
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vec2 d(0, -1), e(0, 0), f(0, 1);
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Error += epsilonEqual(area(d, e, f), 0.0f, EPSILON) ? 0 : 1;
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return Error;
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}
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int test_polygon_area() {
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int Error(0);
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return Error;
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}
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int main()
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{
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int Error(0);
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Error += test_triangle_area_zero();
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Error += test_triangle_area_clockwise_negative();
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Error += test_triangle_area_anticlockwise_positive();
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Error += test_triangle_area_collinear();
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Error += test_polygon_area();
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return Error;
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}
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