Fix vec3::reflect. Add tests for vec3::reflect and vec3::is_zero.

1 files changed, 24 insertions, 0 deletions

diff --git a/test_vec.cpp b/test_vec.cpp
index 1b765aa..143d5b3 100644
--- a/test_vec.cpp
+++ b/test_vec.cpp
@@ -74,4 +74,28 @@ TEST(Vec, Mod2) {
     vec3d b{2.5, 3, 1.2};
     ASSERT_EQ(a.mod2(), 14);
     ASSERT_LE(abs(b.mod2() - (2.5 * 2.5 + 3 * 3 + 1.2 * 1.2)), 1e-10);
+}
+
+TEST(Vec, IsZero) {
+    vec3i a{1,0,0}, b{0,-1,0}, c{1,2,3};
+    ASSERT_FALSE(a.is_zero());
+    ASSERT_FALSE(b.is_zero());
+    ASSERT_FALSE(c.is_zero());
+
+    vec3d d{0.1,0,0}, e{0,-0.1,0},f{0.1,0.1,0.1};
+    ASSERT_FALSE(d.is_zero());
+    ASSERT_FALSE(e.is_zero());
+    ASSERT_FALSE(f.is_zero());
+
+    vec3i g{0,0,0};
+    vec3d h{0,0,0}, i{1e-10,0,0}, j{1e-10,1e-10,1e-10};
+    ASSERT_TRUE(g.is_zero());
+    ASSERT_TRUE(h.is_zero());
+    ASSERT_TRUE(i.is_zero());
+    ASSERT_TRUE(j.is_zero());
+}
+
+TEST(Vec, Reflect) {
+    vec3d n{1,0,0}, u{-1,1.1,0}, v{1,1.1,0};
+    ASSERT_EQ(v, n.reflect(u));
 }
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