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@@ -7,6 +7,8 @@
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*
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*
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*/
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*/
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#include <ray.h>
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#include <ray.h>
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+#include <transformation.h>
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+#include <object.h>
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#include <gtest/gtest.h>
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#include <gtest/gtest.h>
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@@ -29,4 +31,34 @@ TEST(RayTest, Computing_a_point_from_a_distance)
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ASSERT_EQ(r.position(1), Point(3, 3, 4));
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ASSERT_EQ(r.position(1), Point(3, 3, 4));
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ASSERT_EQ(r.position(-1), Point(1, 3, 4));
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ASSERT_EQ(r.position(-1), Point(1, 3, 4));
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ASSERT_EQ(r.position(2.5), Point(4.5, 3, 4));
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ASSERT_EQ(r.position(2.5), Point(4.5, 3, 4));
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+}
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+
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+TEST(RayTest, Translating_a_ray)
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+{
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+ Ray r = Ray(Point(1, 2, 3), Vector(0, 1, 0));
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+
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+ Matrix m = translation(3, 4, 5);
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+ Object o = Object();
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+
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+ o.setTransform(m);
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+
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+ Ray r2 = o.transform(r);
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+
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+ ASSERT_EQ(r2.origin, Point(4, 6, 8));
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+ ASSERT_EQ(r2.direction, Vector(0, 1, 0));
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+}
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+
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+TEST(RayTest, Scaling_a_ray)
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+{
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+ Ray r = Ray(Point(1, 2, 3), Vector(0, 1, 0));
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+
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+ Matrix m = scaling(2, 3, 4);
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+ Object o = Object();
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+
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+ o.setTransform(m);
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+
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+ Ray r2 = o.transform(r);
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+
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+ ASSERT_EQ(r2.origin, Point(2, 6, 12));
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+ ASSERT_EQ(r2.direction, Vector(0, 3, 0));
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}
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}
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