95 lines
3.3 KiB
C++
95 lines
3.3 KiB
C++
/*!
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* 12_cubes.cpp
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*
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* Copyright (c) 2015-2024, NADAL Jean-Baptiste. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*
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* @Author: NADAL Jean-Baptiste
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* @Date: 13/03/2024
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*
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*/
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/*---------------------------------------------------------------------------*/
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#include <external/catch.hpp>
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#include "raytracing.h"
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using namespace Raytracer;
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/* ------------------------------------------------------------------------- */
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class CubeTest
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{
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public:
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Tuple origin;
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Tuple direction;
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double t1;
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double t2;
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};
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/* ------------------------------------------------------------------------- */
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SCENARIO("A Ray intersects a cube", "[features/cubes.feature]")
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{
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// | | origin | direction | t1 | t2 |
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// | +x | point(5, 0.5, 0) | vector(-1, 0, 0) | 4 | 6 |
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// | -x | point(-5, 0.5, 0) | vector( 1, 0, 0) | 4 | 6 |
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// | +y | point(0.5, 5, 0) | vector( 0,-1, 0) | 4 | 6 |
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// | -y | point(0.5, -5, 0) | vector( 0, 1, 0) | 4 | 6 |
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// | +z | point(0.5, 0, 5) | vector( 0, 0,-1) | 4 | 6 |
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// | -z | point(0.5, 0, -5) | vector( 0, 0, 1) | 4 | 6 |
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// | inside | point(0, 0.5, 0) | vector( 0, 0, 1) | -1 | -1 |
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CubeTest the_test[7] = {
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{ Tuple::Point(5.0, 0.5, 0.0), Tuple::Vector(-1, 0, 0), 4, 6},
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{Tuple::Point(-5.0, 0.5, 0.0), Tuple::Vector(1, 0, 0), 4, 6},
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{ Tuple::Point(0.5, 5.0, 0.0), Tuple::Vector(0, -1, 0), 4, 6},
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{ Tuple::Point(0.5, -5.0, 0.0), Tuple::Vector(0, 1, 0), 4, 6},
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{ Tuple::Point(0.5, 0.0, 5.0), Tuple::Vector(0, 0, -1), 4, 6},
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{ Tuple::Point(0.5, 0.0, -5.0), Tuple::Vector(0, 0, 1), 4, 6},
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{ Tuple::Point(0.0, 0.5, 0.0), Tuple::Vector(0, 0, 1), -1, -1}
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};
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GIVEN("c <- cube()")
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{
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Cube c;
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AND_GIVEN("r <- ray(<origin>, <direction>)")
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{
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WHEN("xs <- local_intersect(c,r)")
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{
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for (int i = 0; i < 7; i++)
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{
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Ray r(the_test[i].origin, the_test[i].direction);
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Intersections xs = c.local_intersect(r);
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THEN("xs.count = 2")
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{
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REQUIRE(xs.count() == 2);
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}
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AND_THEN("xs[0].t = <t1>")
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{
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REQUIRE(xs[0].distance_t() == the_test[i].t1);
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}
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AND_THEN("xs[1].t = <t2>")
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{
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REQUIRE(xs[1].distance_t() == the_test[i].t2);
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}
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}
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}
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}
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}
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}
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