504 lines
18 KiB
C++
504 lines
18 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 <catch2/catch_test_macros.hpp>
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#include "raytracing.h"
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#include "common_data.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 <- stripe_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 <- stripe_pattern(white, black)")
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{
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StripePattern pattern(Color::White(), Color::Black());
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THEN("pattern_at(pattern, point(0, 0, 0) = white")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0, 0, 0)) == Color::White());
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}
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AND_THEN("pattern_at(pattern, point(0, 1, 0) = white")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0, 1, 0)) == Color::White());
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}
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AND_THEN("pattern_at(pattern, point(0, 2, 0) = white")
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{
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REQUIRE(pattern.pattern_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 <- stripe_pattern(white, black)")
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{
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StripePattern pattern(Color::White(), Color::Black());
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THEN("pattern_at(pattern, point(0, 0, 0) = white")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0, 0, 0)) == Color::White());
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}
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AND_THEN("pattern_at(pattern, point(0, 0, 1) = white")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0, 0, 1)) == Color::White());
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}
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AND_THEN("pattern_at(pattern, point(0, 0, 2) = white")
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{
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REQUIRE(pattern.pattern_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 <- stripe_pattern(white, black)")
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{
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StripePattern pattern(Color::White(), Color::Black());
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THEN("pattern_at(pattern, point(0, 0, 0) = white")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0, 0, 0)) == Color::White());
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}
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AND_THEN("pattern_at(pattern, point(0.9, 0, 0) = white")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0.9, 0, 0)) == Color::White());
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}
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AND_THEN("pattern_at(pattern, point(1, 0, 0) = black")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(1, 0, 0)) == Color::Black());
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}
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AND_THEN("pattern_at(pattern, point(-0.1, 0, 0) = black")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(-0.1, 0, 0)) == Color::Black());
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}
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AND_THEN("pattern_at(pattern, point(-1, 0, 0) = black")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(-1, 0, 0)) == Color::Black());
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}
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AND_THEN("pattern_at(pattern, point(-1.1, 0, 0) = white")
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{
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REQUIRE(pattern.pattern_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 <- stripe_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 <- pattern_at_shape(pattern, object, point(1.5, 0, 0))")
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{
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Color c = pattern.pattern_at_shape(&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_transform(Matrix::scaling(2, 2, 2));
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WHEN("c <- pattern_at_shape(pattern, object, point(1.5, 0, 0))")
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{
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Color c = pattern.pattern_at_shape(&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_transform(Matrix::translation(0.5, 0, 0));
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WHEN("c <- pattern_at_object(pattern, object, point(2.5, 0, 0))")
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{
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Color c = pattern.pattern_at_shape(&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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/* ------------------------------------------------------------------------- */
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SCENARIO("The default pattern transformation", "[features/patterns.feature]")
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{
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GIVEN("pattern <- test_pattern()")
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{
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TestPattern pattern;
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THEN("pattern.transform = identity_matrix")
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{
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REQUIRE(pattern.transform() == Matrix::identity());
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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("Assigning a transformation to the pattern", "[features/patterns.feature]")
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{
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GIVEN("pattern <- test_pattern()")
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{
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TestPattern pattern;
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WHEN("set_pattern_transform(pattern, translation(1,2,3))")
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{
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pattern.set_transform(Matrix::translation(1, 2, 3));
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THEN("pattern.transform = translation(1, 2, 3)")
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{
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REQUIRE(pattern.transform() == Matrix::translation(1, 2, 3));
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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("A pattern with an object transformation", "[features/patterns.feature]")
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{
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GIVEN("shape <- sphere()")
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{
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Sphere shape;
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AND_GIVEN("set_transform(shape, scaling(2, 2, 2))")
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{
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shape.set_transform(Matrix::scaling(2, 2, 2));
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AND_GIVEN("pattern <- test_pattern()")
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{
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TestPattern pattern;
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WHEN("Color c <- pattern_at_shape(pattern, shape, point(2, 3, 4))")
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{
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Color c = pattern.pattern_at_shape(&shape, Tuple::Point(2, 3, 4));
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THEN("c = color(1, 1.5, 2)")
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{
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REQUIRE(c == Color(1, 1.5, 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("A pattern with a pattern transformation", "[features/patterns.feature]")
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{
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GIVEN("shape <- sphere()")
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{
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Sphere shape;
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AND_GIVEN("pattern <- test_pattern()")
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{
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TestPattern pattern;
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AND_GIVEN("set_pattern_transform(pattern, scaling(2, 2, 2))")
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{
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pattern.set_transform(Matrix::scaling(2, 2, 2));
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WHEN("c <- pattern_at_shape(pattern, shape, point(2, 3, 4))")
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{
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Color c = pattern.pattern_at_shape(&shape, Tuple::Point(2, 3, 4));
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THEN("c = color(1, 1.5, 2)")
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{
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REQUIRE(c == Color(1, 1.5, 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("A pattern with both an object and a pattern transformation", "[features/patterns.feature]")
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{
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GIVEN("shape <- sphere()")
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{
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Sphere shape;
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AND_GIVEN("set_transform(shape, scaling(2, 2, 2))")
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{
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shape.set_transform(Matrix::scaling(2, 2, 2));
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AND_GIVEN("pattern <- test_pattern()")
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{
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TestPattern pattern;
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AND_GIVEN("set_pattern_transform(pattern, translation(0.5, 1, 1.5))")
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{
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pattern.set_transform(Matrix::translation(0.5, 1, 1.5));
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WHEN("c <- pattern_at_shape(pattern, shape, point(2.5, 3, 3.5))")
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{
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Color c = pattern.pattern_at_shape(&shape, Tuple::Point(2.5, 3, 3.5));
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THEN("c = color(0.75, 0.5, 0.25)")
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{
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REQUIRE(c == Color(0.75, 0.5, 0.25));
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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("A gradient linearly interpolates between colors", "[features/patterns.feature]")
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{
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GIVEN("pattern <- gradient_pattern(white, black)")
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{
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GradientPattern pattern(Color::White(), Color::Black());
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THEN("pattern_at(pattern, point(0, 0, 0)) == white")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0, 0, 0)) == Color::White());
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}
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AND_THEN("pattern_at(pattern, point(0.25, 0, 0)) == color(0.75, 0.75, 0.75)")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0.25, 0, 0)) == Color(0.75, 0.75, 0.75));
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}
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AND_THEN("pattern_at(pattern, point(0.5, 0, 0)) == color(0.5, 0.5, 0.5)")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0.5, 0, 0)) == Color(0.5, 0.5, 0.5));
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}
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AND_THEN("pattern_at(pattern, point(0.75, 0, 0)) == color(0,25, 0.25, 0.25)")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0.75, 0, 0)) == Color(0.25, 0.25, 0.25));
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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("A ring should extend in both x and z", "[features/patterns.feature]")
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{
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GIVEN("pattern <- ring_pattern(white, black)")
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{
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RingPattern pattern(Color::White(), Color::Black());
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THEN("pattern_at(pattern, point(0, 0, 0)) == white")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0, 0, 0)) == Color::White());
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}
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AND_THEN("pattern_at(pattern, point(1, 0, 0)) == black")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(1, 0, 0)) == Color::Black());
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}
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AND_THEN("pattern_at(pattern, point(0, 0, 1)) == black")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0, 0, 1)) == Color::Black());
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}
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// 0.708 = just slightly more than sqrt(2)2
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AND_THEN("pattern_at(pattern, point(0.708, 0, 0.708)) == black")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0.708, 0, 0.708)) == Color::Black());
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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("Checkers should repeat in x", "[features/patterns.feature]")
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{
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GIVEN("pattern <- checkers_pattern(white, black)")
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{
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CheckersPattern pattern(Color::White(), Color::Black());
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THEN("pattern_at(pattern, point(0, 0, 0)) == white")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0, 0, 0)) == Color::White());
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}
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AND_THEN("pattern_at(pattern, point(0.99, 0, 0)) == white")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0.99, 0, 0)) == Color::White());
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}
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AND_THEN("pattern_at(pattern, point(1.01, 0, 0)) == black")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(1.01, 0, 0)) == Color::Black());
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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("Checkers should repeat in y", "[features/patterns.feature]")
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{
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GIVEN("pattern <- checkers_pattern(white, black)")
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{
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CheckersPattern pattern(Color::White(), Color::Black());
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THEN("pattern_at(pattern, point(0, 0, 0)) == white")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0, 0, 0)) == Color::White());
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}
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AND_THEN("pattern_at(pattern, point(0, 0.99, 0)) == white")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0, 0.99, 0)) == Color::White());
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}
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AND_THEN("pattern_at(pattern, point(0, 1.01, 0)) == black")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0, 1.01, 0)) == Color::Black());
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}
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}
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}
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/* ------------------------------------------------------------------------- */
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SCENARIO("Checkers should repeat in z", "[features/patterns.feature]")
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{
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GIVEN("pattern <- checkers_pattern(white, black)")
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{
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CheckersPattern pattern(Color::White(), Color::Black());
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THEN("pattern_at(pattern, point(0, 0, 0)) == white")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0, 0, 0)) == Color::White());
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}
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AND_THEN("pattern_at(pattern, point(0, 0, 0.99)) == white")
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{
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REQUIRE(pattern.pattern_at(Tuple::Point(0, 0, 0.99)) == Color::White());
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}
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AND_THEN("pattern_at(pattern, point(0, 0, 1.01)) == black")
|
|
{
|
|
REQUIRE(pattern.pattern_at(Tuple::Point(0, 0, 1.01)) == Color::Black());
|
|
}
|
|
}
|
|
}
|