269 lines
9.7 KiB
C++
269 lines
9.7 KiB
C++
/*!
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* 10_patterns.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: 27/02/2024
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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("Creating a stripe pattern", "[features/patterns.feature]")
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{
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GIVEN("pattern <- strip_pattern(white, black)")
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{
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StripePattern pattern(Color::White(), Color::Black());
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THEN("pattern.a = white")
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{
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REQUIRE(pattern.a() == Color::White());
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}
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AND_THEN("pattern.b = black")
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{
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REQUIRE(pattern.b() == Color::Black());
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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("A stripe pattern is constant in y", "[features/patterns.feature]")
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{
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GIVEN("pattern <- strip_pattern(white, black)")
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{
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StripePattern pattern(Color::White(), Color::Black());
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THEN("stripe_at(pattern, point(0, 0, 0) = white")
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{
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REQUIRE(pattern.stripe_at(Tuple::Point(0, 0, 0)) == Color::White());
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}
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AND_THEN("stripe_at(pattern, point(0, 1, 0) = white")
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{
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REQUIRE(pattern.stripe_at(Tuple::Point(0, 1, 0)) == Color::White());
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}
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AND_THEN("stripe_at(pattern, point(0, 2, 0) = white")
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{
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REQUIRE(pattern.stripe_at(Tuple::Point(0, 2, 0)) == Color::White());
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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("A stripe pattern is constant in z", "[features/patterns.feature]")
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{
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GIVEN("pattern <- strip_pattern(white, black)")
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{
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StripePattern pattern(Color::White(), Color::Black());
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THEN("stripe_at(pattern, point(0, 0, 0) = white")
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{
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REQUIRE(pattern.stripe_at(Tuple::Point(0, 0, 0)) == Color::White());
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}
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AND_THEN("stripe_at(pattern, point(0, 0, 1) = white")
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{
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REQUIRE(pattern.stripe_at(Tuple::Point(0, 0, 1)) == Color::White());
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}
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AND_THEN("stripe_at(pattern, point(0, 0, 2) = white")
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{
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REQUIRE(pattern.stripe_at(Tuple::Point(0, 0, 2)) == Color::White());
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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("A stripe pattern alternates in x", "[features/patterns.feature]")
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{
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GIVEN("pattern <- strip_pattern(white, black)")
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{
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StripePattern pattern(Color::White(), Color::Black());
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THEN("stripe_at(pattern, point(0, 0, 0) = white")
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{
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REQUIRE(pattern.stripe_at(Tuple::Point(0, 0, 0)) == Color::White());
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}
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AND_THEN("stripe_at(pattern, point(0.9, 0, 0) = white")
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{
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REQUIRE(pattern.stripe_at(Tuple::Point(0.9, 0, 0)) == Color::White());
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}
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AND_THEN("stripe_at(pattern, point(1, 0, 0) = black")
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{
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REQUIRE(pattern.stripe_at(Tuple::Point(1, 0, 0)) == Color::Black());
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}
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AND_THEN("stripe_at(pattern, point(-0.1, 0, 0) = black")
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{
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REQUIRE(pattern.stripe_at(Tuple::Point(-0.1, 0, 0)) == Color::Black());
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}
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AND_THEN("stripe_at(pattern, point(-1, 0, 0) = black")
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{
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REQUIRE(pattern.stripe_at(Tuple::Point(-1, 0, 0)) == Color::Black());
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}
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AND_THEN("stripe_at(pattern, point(-1.1, 0, 0) = white")
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{
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REQUIRE(pattern.stripe_at(Tuple::Point(-1.1, 0, 0)) == Color::White());
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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("Lightning with a pattern applied", "[features/materials.feature]")
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{
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GIVEN("object <- sphere()")
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{
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Sphere object;
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Material m;
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GIVEN("m.pattern <- strip_pattern(color(1, 1, 1), color(0, 0, 0))")
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{
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m.set_pattern(new StripePattern(Color(1, 1, 1), Color(0, 0, 0)));
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AND_GIVEN("m.ambient <- 1")
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{
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m.set_ambient(1);
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AND_GIVEN("m.diffuse <- 0")
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{
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m.set_diffuse(0);
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AND_GIVEN("m.specular <- 0")
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{
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m.set_specular(0);
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AND_GIVEN("eyev <- vector(0, 0, -1)")
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{
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Tuple eyev = Tuple::Vector(0, 0, -1);
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AND_GIVEN("normalv <- vector(0, 0, -1)")
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{
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Tuple normalv = Tuple::Vector(0, 0, -1);
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AND_GIVEN("light <- point_light(point(0, 0, -10), color(1, 1, 1))")
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{
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PointLight light = PointLight(Tuple::Point(0, 0, -10), Color(1, 1, 1));
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WHEN("c1 <- lighting(m, light, point(0.9, 0, 0), eyev, normalv, false)")
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{
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Color c1 =
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m.lighting(&object, light, Tuple::Point(0.9, 0, 0), eyev, normalv, false);
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AND_WHEN("c2 <- lighting(m, light, point(1.1, 0, 0), eyev, normalv, false)")
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{
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Color c2 = m.lighting(&object, light, Tuple::Point(1.1, 0, 0), eyev,
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normalv, false);
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THEN("c1 = color(1, 1, 1)")
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{
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REQUIRE(c1 == Color(1, 1, 1));
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}
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AND_THEN("c2 = color(0, 0, 0)")
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{
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REQUIRE(c2 == 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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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("Stripes with an object transformation", "[features/patterns.feature]")
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{
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GIVEN("object <- sphere()")
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{
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Sphere object;
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AND_GIVEN("set_transform(object, scaling(2, 2, 2))")
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{
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object.set_transform(Matrix::scaling(2, 2, 2));
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AND_GIVEN("pattern <- stripe_pattern(white, black)")
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{
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StripePattern pattern(Color::White(), Color::Black());
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WHEN("c <- stripe_at_object(pattern, object, point(1.5, 0, 0))")
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{
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Color c = pattern.stripe_at_object(&object, Tuple::Point(1.5, 0, 0));
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THEN("c = white")
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{
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REQUIRE(c == Color::White());
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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("Stripes with an pattern transformation", "[features/patterns.feature]")
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{
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GIVEN("object <- sphere()")
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{
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Sphere object;
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AND_GIVEN("pattern <- stripe_pattern(white, black)")
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{
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StripePattern pattern(Color::White(), Color::Black());
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AND_GIVEN("set_transform(pattern, scaling(2, 2, 2))")
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{
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pattern.set_pattern_transform(Matrix::scaling(2, 2, 2));
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WHEN("c <- stripe_at_object(pattern, object, point(1.5, 0, 0))")
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{
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Color c = pattern.stripe_at_object(&object, Tuple::Point(1.5, 0, 0));
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THEN("c = white")
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{
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REQUIRE(c == Color::White());
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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("Stripes with both an object and pattern transformation", "[features/patterns.feature]")
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{
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GIVEN("object <- sphere()")
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{
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Sphere object;
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AND_GIVEN("set_transform(object, scaling(2, 2, 2))")
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{
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object.set_transform(Matrix::scaling(2, 2, 2));
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AND_GIVEN("pattern <- stripe_pattern(white, black)")
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{
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StripePattern pattern(Color::White(), Color::Black());
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AND_GIVEN("set_pattern_transform(pattern, translation(0.5, 0, 0)))")
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{
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pattern.set_pattern_transform(Matrix::translation(0.5, 0, 0));
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WHEN("c <- stripe_at_object(pattern, object, point(2.5, 0, 0))")
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{
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Color c = pattern.stripe_at_object(&object, Tuple::Point(1.5, 0, 0));
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THEN("c = white")
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{
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REQUIRE(c == Color::White());
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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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