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