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World is on the verge of working!

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Godzil
2020-02-20 01:41:53 +00:00
parent be6b472472
commit 999419dfe1
6 changed files with 170 additions and 0 deletions
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44
tests/intersect_test.cpp
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@@ -7,6 +7,7 @@
*
*/
#include <intersect.h>
#include <intersection.h>
#include <sphere.h>
#include <gtest/gtest.h>
@@ -129,4 +130,47 @@ TEST(IntersectTest, The_hit_is_always_the_lowest_nonnegative_intersection)
Intersection i = xs.hit();
ASSERT_EQ(i, i4);
}
TEST(IntersectTest, Precomputing_the_state_of_an_intersection)
{
Ray r = Ray(Point(0, 0, -5), Vector(0, 0, 1));
Sphere shape = Sphere();
Intersection i = Intersection(4, &shape);
Computation comps = i.prepareComputation(r);
ASSERT_EQ(comps.t, i.t);
ASSERT_EQ(comps.object, i.object);
ASSERT_EQ(comps.hitPoint, Point(0, 0, -1));
ASSERT_EQ(comps.eyeVector, Vector(0, 0, -1));
ASSERT_EQ(comps.normalVector, Vector(0, 0, -1));
}
TEST(IntersectTest, The_hit_when_an_intersection_occurs_on_the_outside)
{
Ray r = Ray(Point(0, 0, -5), Vector(0, 0, 1));
Sphere shape = Sphere();
Intersection i = Intersection(4, &shape);
Computation comps = i.prepareComputation(r);
ASSERT_EQ(comps.inside, false);
}
TEST(IntersectTest, The_hit_when_an_intersection_occurs_on_the_inside)
{
Ray r = Ray(Point(0, 0, 0), Vector(0, 0, 1));
Sphere shape = Sphere();
Intersection i = Intersection(1, &shape);
Computation comps = i.prepareComputation(r);
ASSERT_EQ(comps.hitPoint, Point(0, 0, 1));
ASSERT_EQ(comps.eyeVector, Vector(0, 0, -1));
ASSERT_EQ(comps.inside, true);
/* Normal vector would have been (0, 0, 1); but is inverted ! */
ASSERT_EQ(comps.normalVector, Vector(0, 0, -1));
}