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@@ -7,19 +7,20 @@
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*
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*/
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#include <shape.h>
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+#include <testshape.h>
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#include <matrix.h>
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#include <transformation.h>
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#include <gtest/gtest.h>
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TEST(ShapeTest, The_default_transformation)
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{
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- Shape s = Shape();
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+ TestShape s = TestShape();
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ASSERT_EQ(s.transformMatrix, Matrix4().identity());
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}
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TEST(ShapeTest, Assigning_a_transformation)
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{
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- Shape s = Shape();
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+ TestShape s = TestShape();
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s.setTransform(translation(2, 3, 4));
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@@ -28,18 +29,70 @@ TEST(ShapeTest, Assigning_a_transformation)
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TEST(ShapeTest, The_default_material)
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{
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- Shape s = Shape();
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+ TestShape s = TestShape();
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ASSERT_EQ(s.material, Material());
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}
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TEST(ShapeTest, Assigning_a_material)
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{
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- Shape s = Shape();
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+ TestShape s = TestShape();
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Material m = Material();
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m.ambient = 1;
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s.material = m;
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ASSERT_EQ(s.material, m);
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+}
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+
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+TEST(ShapeTest, Intersecting_a_scaled_shape_with_a_ray)
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+{
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+ Ray r = Ray(Point(0, 0, -5), Vector(0, 0, 1));
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+ TestShape s = TestShape();
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+
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+ s.setTransform(scaling(2, 2, 2));
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+ Intersect xs = s.intersect(r);
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+
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+ ASSERT_EQ(s.localRay.origin, Point(0, 0, -2.5));
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+ ASSERT_EQ(s.localRay.direction, Vector(0, 0, 0.5));
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+}
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+
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+TEST(ShapeTest, Intersecting_a_translated_shape_with_a_ray)
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+{
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+ Ray r = Ray(Point(0, 0, -5), Vector(0, 0, 1));
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+ TestShape s = TestShape();
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+
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+ s.setTransform(translation(5, 0, 0));
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+ Intersect xs = s.intersect(r);
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+
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+ ASSERT_EQ(s.localRay.origin, Point(-5, 0, -5));
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+ ASSERT_EQ(s.localRay.direction, Vector(0, 0, 1));
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+}
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+
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+TEST(ShapeTest, Computing_the_normal_on_a_translated_shape)
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+{
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+ TestShape s = TestShape();
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+ s.setTransform(translation(0, 1, 0));
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+ Tuple n = s.normalAt(Point(0, 1.70711, -0.70711));
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+
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+ /* Temporary lower the precision */
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+ set_equal_precision(0.00001);
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+
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+ ASSERT_EQ(n, Vector(0, 0.70711, -0.70711));
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+
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+ set_equal_precision(FLT_EPSILON);
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+}
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+
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+TEST(ShapeTest, Computing_the_normal_on_a_tranformed_shape)
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+{
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+ TestShape s = TestShape();
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+ s.setTransform(scaling(1, 0.5, 1) * rotationZ(M_PI / 5));
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+ Tuple n = s.normalAt(Point(0, sqrt(2)/2, -sqrt(2)/2));
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+
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+ /* Temporary lower the precision */
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+ set_equal_precision(0.00001);
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+
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+ ASSERT_EQ(n, Vector(0, 0.97014, -0.24254));
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+
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+ set_equal_precision(FLT_EPSILON);
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}
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