323 lines
12 KiB
C++
323 lines
12 KiB
C++
/*!
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* 11_reflection_refraction.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: 05/03/2024
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*
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*/
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/*---------------------------------------------------------------------------*/
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#include <catch.hpp>
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#include "raytracing.h"
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using namespace Raytracer;
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/* ------------------------------------------------------------------------- */
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SCENARIO("Reflectivity for the default material", "[features/materials.feature]")
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{
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GIVEN("m <- material()")
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{
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Material m;
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THEN("m.reflective = 0.0")
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{
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REQUIRE(m.reflective() == 0);
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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("Precomputing the reflection vector", "[features/intersections.feature]")
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{
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GIVEN("shape <- plane()")
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{
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Plane shape;
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AND_GIVEN("r <- ray(point(0, 1, -1), vector(0, -sqrt(2)/2, sqrt(2)/2))")
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{
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Ray r(Tuple::Point(0, 1, -1), Tuple::Vector(0, -sqrt(2) / 2, sqrt(2) / 2));
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AND_GIVEN("i <- intersection(sqrt(2), shape)")
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{
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Intersection i(sqrt(2), &shape);
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WHEN("comps <- prepare_computation(i, r)")
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{
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IntersectionData comps = i.prepare_computations(r);
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THEN("comps.reflectv = vector(0, sqrt(2) / 2, sqrt(2) / 2)")
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{
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REQUIRE(comps.reflectv() == Tuple::Vector(0, sqrt(2) / 2, sqrt(2) / 2));
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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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/* ------------------------------------------------------------------------- */
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SCENARIO("The reflected color for a non reflective material", "[features/world.feature]")
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{
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GIVEN("w <- default_world()")
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{
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World w = World::default_world();
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AND_GIVEN("ray(point(0, 0, 0), vector(0, 0, 1)")
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{
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Ray r(Tuple::Point(0, 0, 0), Tuple::Vector(0, 0, 1));
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AND_GIVEN("shape <-the second object in w")
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{
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Shape *shape = w.objects(1);
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AND_GIVEN("shape.material.ambient <- 1")
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{
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shape->material().set_ambient(1);
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AND_GIVEN("i <- intersection(1, shape)")
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{
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Intersection i(1, shape);
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WHEN("comps <- prepare_computation(i, r)")
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{
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IntersectionData comps = i.prepare_computations(r);
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AND_WHEN("color <- reflected_color(w, comps)")
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{
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Color color = w.reflected_color(comps);
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THEN("color = color(0, 0, 0)")
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{
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REQUIRE(color == Color(0, 0, 0));
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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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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("The reflected color for a reflective material", "[features/world.feature]")
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{
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GIVEN("w <- default_world()")
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{
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World w = World::default_world();
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AND_GIVEN("shape <- plane() with:")
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// | material.reflective | 0.5 |
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// | transform | translation(0, -1, 0) |
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{
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Plane shape;
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shape.material().set_reflective(0.5);
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shape.set_transform(Matrix::translation(0, -1, 0));
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AND_GIVEN("shape is added to w")
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{
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w.add_object(&shape);
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AND_GIVEN("ray(point(0, 0, -3), vector(0, -sqrt(2) / 2, sqrt(2) / 2)")
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{
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Ray r(Tuple::Point(0, 0, -3), Tuple::Vector(0, -sqrt(2) / 2, sqrt(2) / 2));
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AND_GIVEN("i <- intersection(sqrt(2), shape)")
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{
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Intersection i(sqrt(2), &shape);
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WHEN("comps <- prepare_computation(i, r)")
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{
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IntersectionData comps = i.prepare_computations(r);
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AND_WHEN("color <- reflected_color(w, comps)")
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{
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Color color = w.reflected_color(comps);
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THEN("color = color(0.19032, 0.2379, 0.14274)")
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{
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REQUIRE(color == Color(0.19032, 0.2379, 0.14274));
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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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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("shade_it() with a reflective material", "[features/world.feature]")
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{
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GIVEN("w <- default_world()")
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{
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World w = World::default_world();
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AND_GIVEN("shape <- plane() with:")
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// | material.reflective | 0.5 |
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// | transform | translation(0, -1, 0) |
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{
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Plane shape;
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shape.material().set_reflective(0.5);
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shape.set_transform(Matrix::translation(0, -1, 0));
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AND_GIVEN("shape is added to w")
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{
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w.add_object(&shape);
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AND_GIVEN("ray(point(0, 0, -3), vector(0, -sqrt(2) / 2, sqrt(2) / 2)")
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{
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Ray r(Tuple::Point(0, 0, -3), Tuple::Vector(0, -sqrt(2) / 2, sqrt(2) / 2));
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AND_GIVEN("i <- intersection(sqrt(2), shape)")
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{
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Intersection i(sqrt(2), &shape);
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WHEN("comps <- prepare_computation(i, r)")
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{
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IntersectionData comps = i.prepare_computations(r);
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AND_WHEN("color <- shade_hit(w, comps)")
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{
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Color color = w.shade_hit(comps);
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THEN("color = color(0.87677, 0.92436, 0.82918)")
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{
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REQUIRE(color == Color(0.87677, 0.92436, 0.82918));
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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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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("color_at() with mutually reflective surfaces", "[features/world.feature]")
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{
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GIVEN("w <- default_world()")
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{
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World w = World::default_world();
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AND_GIVEN("w.light <- point_light(point(0, 0, 0), color(1, 1, 1))")
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{
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w.set_light(PointLight(Tuple::Point(0, 0, 0), Color(1, 1, 1)));
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AND_GIVEN("lower <- plane() with:")
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// | material.reflective | 1 |
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// | transform | translation(0, -1, 0) |
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{
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Plane lower;
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lower.material().set_reflective(1);
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lower.set_transform(Matrix::translation(0, -1, 0));
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AND_GIVEN("lower is added to w")
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{
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w.add_object(&lower);
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AND_GIVEN("upper <- plane() with:")
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// | material.reflective | 1 |
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// | transform | translation(0, 1, 0) |
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{
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Plane upper;
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upper.material().set_reflective(1);
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upper.set_transform(Matrix::translation(0, 1, 0));
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AND_GIVEN("upper is added to w")
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{
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w.add_object(&upper);
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AND_GIVEN("ray(point(0, 0, 0), vector(0, 1, 0)")
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{
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Ray r(Tuple::Point(0, 0, 0), Tuple::Vector(0, 1, 0));
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THEN("color_at(w, r) terminate successfully")
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{
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w.color_at(r);
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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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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("The reflected color at the maximum recursive depth", "[features/world.feature]")
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{
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GIVEN("w <- default_world()")
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{
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World w = World::default_world();
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AND_GIVEN("shape <- plane() with:")
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// | material.reflective | 0.5 |
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// | transform | translation(0, -1, 0) |
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{
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Plane shape;
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shape.material().set_reflective(0.5);
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shape.set_transform(Matrix::translation(0, -1, 0));
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AND_GIVEN("shape is added to w")
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{
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w.add_object(&shape);
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AND_GIVEN("ray(point(0, 0, -3), vector(0, -sqrt(2) / 2, sqrt(2) / 2)")
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{
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Ray r(Tuple::Point(0, 0, -3), Tuple::Vector(0, -sqrt(2) / 2, sqrt(2) / 2));
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AND_GIVEN("i <- intersection(sqrt(2), shape)")
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{
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Intersection i(sqrt(2), &shape);
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WHEN("comps <- prepare_computation(i, r)")
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{
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IntersectionData comps = i.prepare_computations(r);
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AND_WHEN("color <- reflected_color(w, comps, 0)")
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{
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Color color = w.reflected_color(comps, 0);
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THEN("color = color(0.19032, 0.2379, 0.14274)")
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{
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REQUIRE(color == Color(0, 0, 0));
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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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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("Transparency and Refractive Index for the default material", "[features/materials.feature]")
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{
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GIVEN("m <- material()")
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{
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Material m;
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THEN("m.transparency = 0.0")
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{
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REQUIRE(m.transparency() == 0.0);
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}
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AND_THEN("m.refractive_index = 1.0")
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{
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REQUIRE(m.refractive_index() == 1.0);
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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("A helper for producing a sphere with a glassy material", "[features/spheres.feature]")
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{
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GIVEN("s <- glass_sphere()")
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{
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Sphere s = Sphere::Glass();
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THEN("s.transform = identity_matrix")
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{
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REQUIRE(s.transform() == Matrix::identity());
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}
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AND_THEN("s.material.transparency = 1.0")
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{
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REQUIRE(s.material().transparency() == 1.0);
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}
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AND_THEN("s.material.refractive_index = 1.5")
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{
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REQUIRE(s.material().refractive_index() == 1.5);
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}
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}
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}
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