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WIP: Properly initialize all elements of LookAt matrix (#84)

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* Properly initialize all elements of LookAt matrix

* Update version and readme

* Add a test for LookAt

good enough
This commit is contained in:
Ben Visness
2018-06-03 18:42:09 -05:00
committed by GitHub
parent f8b3a84cec
commit bee0e0c569
3 changed files with 31 additions and 1 deletions
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24
test/categories/Transformation.h
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@@ -51,3 +51,27 @@ TEST(Transformations, Scale)
EXPECT_FLOAT_EQ(scaled.Z, 1.5f);
EXPECT_FLOAT_EQ(scaled.W, 1.0f);
}
TEST(Transformations, LookAt)
{
const float abs_error = 0.0001f;
hmm_mat4 result = HMM_LookAt(HMM_Vec3(1.0f, 0.0f, 0.0f), HMM_Vec3(0.0f, 2.0f, 1.0f), HMM_Vec3(2.0f, 1.0f, 1.0f));
EXPECT_NEAR(result.Elements[0][0], 0.169031f, abs_error);
EXPECT_NEAR(result.Elements[0][1], 0.897085f, abs_error);
EXPECT_NEAR(result.Elements[0][2], 0.408248f, abs_error);
EXPECT_FLOAT_EQ(result.Elements[0][3], 0.0f);
EXPECT_NEAR(result.Elements[1][0], 0.507093f, abs_error);
EXPECT_NEAR(result.Elements[1][1], 0.276026f, abs_error);
EXPECT_NEAR(result.Elements[1][2], -0.816497f, abs_error);
EXPECT_FLOAT_EQ(result.Elements[1][3], 0.0f);
EXPECT_NEAR(result.Elements[2][0], -0.845154f, abs_error);
EXPECT_NEAR(result.Elements[2][1], 0.345033f, abs_error);
EXPECT_NEAR(result.Elements[2][2], -0.408248f, abs_error);
EXPECT_FLOAT_EQ(result.Elements[2][3], 0.0f);
EXPECT_NEAR(result.Elements[3][0], -0.169031f, abs_error);
EXPECT_NEAR(result.Elements[3][1], -0.897085f, abs_error);
EXPECT_NEAR(result.Elements[3][2], -0.408248f, abs_error);
EXPECT_FLOAT_EQ(result.Elements[3][3], 1.0f);
}