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Working on groups

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Godzil
2020-02-24 09:25:52 +00:00
parent 80f59efa43
commit 7c794f0496
8 changed files with 272 additions and 9 deletions
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46
tests/shape_test.cpp
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@@ -9,6 +9,8 @@
#include <shape.h>
#include <testshape.h>
#include <matrix.h>
#include <group.h>
#include <sphere.h>
#include <transformation.h>
#include <gtest/gtest.h>
@@ -94,5 +96,49 @@ TEST(ShapeTest, Computing_the_normal_on_a_tranformed_shape)
ASSERT_EQ(n, Vector(0, 0.97014, -0.24254));
set_equal_precision(FLT_EPSILON);
}
TEST(ShapeTest, A_shape_has_a_parent_attribute)
{
TestShape s = TestShape();
ASSERT_EQ(s.parent, nullptr);
}
TEST(TestShape, Converting_a_point_from_world_to_object_space)
{
Group g1 = Group();
g1.setTransform(rotationY(M_PI / 2));
Group g2 = Group();
g2.setTransform(scaling(2, 2, 2));
g1.addObject(&g2);
Sphere s = Sphere();
s.setTransform(translation(5, 0, 0));
g2.addObject(&s);
Tuple p = s.worldToObject(Point(-2, 0, -10));
ASSERT_EQ(p, Point(0, 0, -1));
}
TEST(TestShape, Converting_a_normal_form_object_to_world_space)
{
Group g1 = Group();
g1.setTransform(rotationY(M_PI / 2));
Group g2 = Group();
g2.setTransform(scaling(1, 2, 3));
g1.addObject(&g2);
Sphere s = Sphere();
s.setTransform(translation(5, 0, 0));
g2.addObject(&s);
Tuple p = s.normalToWorld(Point(sqrt(3)/3, sqrt(3)/3, sqrt(3)/3));
/* Temporary lower the precision */
set_equal_precision(0.0001);
ASSERT_EQ(p, Point(0.2857, 0.4286, -0.8571));
set_equal_precision(FLT_EPSILON);
}