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- /*
- * DoRayMe - a quick and dirty Raytracer
- * Smooth Triangle unit tests
- *
- * Created by Manoël Trapier
- * Copyright (c) 2020 986-Studio.
- *
- */
- #include <smoothtriangle.h>
- #include <math.h>
- #include <gtest/gtest.h>
- class SmoothTriTest : public SmoothTriangle
- {
- public:
- SmoothTriTest(Point p1, Point p2, Point p3, Vector n1, Vector n2, Vector n3) : SmoothTriangle(p1, p2, p3, n1, n2, n3) {};
- void doLocalIntersect(Ray ray, Intersect &xs)
- {
- this->localIntersect(ray, xs);
- };
- Tuple doLocalNormalAt(Tuple point, Intersection *hit)
- {
- return this->localNormalAt(point, hit);
- };
- };
- Point p1 = Point(0, 1, 0);
- Point p2 = Point(-1, 0, 0);
- Point p3 = Point(1, 0, 0);
- Vector n1 = Vector(0, 1, 0);
- Vector n2 = Vector(-1, 0, 0);
- Vector n3 = Vector(1, 0, 0);
- SmoothTriTest tri = SmoothTriTest(p1, p2, p3, n1, n2, n3);
- TEST(SmoothTriangleTest, Construcring_a_smooth_triangle)
- {
- ASSERT_EQ(tri.p1, p1);
- ASSERT_EQ(tri.p2, p2);
- ASSERT_EQ(tri.p3, p3);
- ASSERT_EQ(tri.n1, n1);
- ASSERT_EQ(tri.n2, n2);
- ASSERT_EQ(tri.n3, n3);
- }
- TEST(SmoothTriangleTest, An_intersection_with_a_smooth_triangle_stores_u_v)
- {
- Ray r = Ray(Point(-0.2, 0.3, -2), Vector(0, 0, 1));
- Intersect xs; tri.doLocalIntersect(r, xs);
- ASSERT_TRUE(double_equal(xs[0].u, 0.45));
- ASSERT_TRUE(double_equal(xs[0].v, 0.25));
- }
- TEST(SmoothTriangleTest, A_smooth_triangle_uses_u_v_to_interpolate_the_normal)
- {
- Intersection i = Intersection(1, &tri, 0.45, 0.25);
- Tuple n = tri.doLocalNormalAt(Point(0, 0, 0), &i);
- /* Temporary lower the precision */
- set_equal_precision(0.00001);
- ASSERT_EQ(n, Vector(-0.5547, 0.83205, 0));
- set_equal_precision(FLT_EPSILON);
- }
- TEST(SmoothTriangleTest, Preparing_a_normal_on_a_smooth_triangle)
- {
- Intersection i = Intersection(1, &tri, 0.45, 0.25);
- Tuple n = tri.normalAt(Point(0, 0, 0), &i);
- /* Temporary lower the precision */
- set_equal_precision(0.00001);
- ASSERT_EQ(n, Vector(-0.5547, 0.83205, 0));
- set_equal_precision(FLT_EPSILON);
- }
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