diff options
Diffstat (limited to 'core/fxcrt')
| -rw-r--r-- | core/fxcrt/fx_coordinates_unittest.cpp | 158 |
1 files changed, 155 insertions, 3 deletions
diff --git a/core/fxcrt/fx_coordinates_unittest.cpp b/core/fxcrt/fx_coordinates_unittest.cpp index 6fec10ecac..15ee661509 100644 --- a/core/fxcrt/fx_coordinates_unittest.cpp +++ b/core/fxcrt/fx_coordinates_unittest.cpp @@ -229,7 +229,30 @@ TEST(CFX_Matrix, ReverseIdentity) { EXPECT_FLOAT_EQ(expected.y, result.y); } -TEST(CFX_Matrix, Reverse) { +TEST(CFX_Matrix, SetIdentity) { + CFX_Matrix m; + EXPECT_FLOAT_EQ(1.0, m.a); + EXPECT_FLOAT_EQ(0.0, m.b); + EXPECT_FLOAT_EQ(0.0, m.c); + EXPECT_FLOAT_EQ(1.0, m.d); + EXPECT_FLOAT_EQ(0.0, m.e); + EXPECT_FLOAT_EQ(0.0, m.f); + EXPECT_TRUE(m.IsIdentity()); + + m.a = -1; + EXPECT_FALSE(m.IsIdentity()); + + m.SetIdentity(); + EXPECT_FLOAT_EQ(1.0, m.a); + EXPECT_FLOAT_EQ(0.0, m.b); + EXPECT_FLOAT_EQ(0.0, m.c); + EXPECT_FLOAT_EQ(1.0, m.d); + EXPECT_FLOAT_EQ(0.0, m.e); + EXPECT_FLOAT_EQ(0.0, m.f); + EXPECT_TRUE(m.IsIdentity()); +} + +TEST(CFX_Matrix, GetInverse) { static constexpr float data[6] = {3, 0, 2, 3, 1, 4}; CFX_Matrix m(data); CFX_Matrix rev = m.GetInverse(); @@ -248,7 +271,7 @@ TEST(CFX_Matrix, Reverse) { } // Note, I think these are a bug and the matrix should be the identity. -TEST(CFX_Matrix, ReverseCR702041) { +TEST(CFX_Matrix, GetInverseCR702041) { // The determinate is < std::numeric_limits<float>::epsilon() static constexpr float data[6] = {0.947368443f, -0.108947366f, -0.923076928f, 0.106153846f, 18.0f, 787.929993f}; @@ -269,7 +292,7 @@ TEST(CFX_Matrix, ReverseCR702041) { EXPECT_FLOAT_EQ(expected.y, result.y); } -TEST(CFX_Matrix, ReverseCR714187) { +TEST(CFX_Matrix, GetInverseCR714187) { // The determinate is < std::numeric_limits<float>::epsilon() static constexpr float data[6] = {0.000037f, 0.0f, 0.0f, -0.000037f, 182.413101f, 136.977646f}; @@ -290,6 +313,135 @@ TEST(CFX_Matrix, ReverseCR714187) { EXPECT_FLOAT_EQ(expected.y, result.y); } +#define EXPECT_NEAR_FIVE_PLACES(a, b) EXPECT_NEAR((a), (b), 1e-5) + +TEST(CFX_Matrix, ComposeTransformations) { + // sin(FX_PI/2) and cos(FX_PI/2) have a tiny error and are not exactly 1.0f + // and 0.0f. The rotation matrix is thus not perfect. + + CFX_Matrix rotate_90; + rotate_90.Rotate(FX_PI / 2); + EXPECT_NEAR_FIVE_PLACES(0.0f, rotate_90.a); + EXPECT_NEAR_FIVE_PLACES(1.0f, rotate_90.b); + EXPECT_NEAR_FIVE_PLACES(-1.0f, rotate_90.c); + EXPECT_NEAR_FIVE_PLACES(0.0f, rotate_90.d); + EXPECT_FLOAT_EQ(0.0f, rotate_90.e); + EXPECT_FLOAT_EQ(0.0f, rotate_90.f); + + CFX_Matrix translate_23_11; + translate_23_11.Translate(23, 11); + EXPECT_FLOAT_EQ(1.0f, translate_23_11.a); + EXPECT_FLOAT_EQ(0.0f, translate_23_11.b); + EXPECT_FLOAT_EQ(0.0f, translate_23_11.c); + EXPECT_FLOAT_EQ(1.0f, translate_23_11.d); + EXPECT_FLOAT_EQ(23.0f, translate_23_11.e); + EXPECT_FLOAT_EQ(11.0f, translate_23_11.f); + + CFX_Matrix scale_5_13; + scale_5_13.Scale(5, 13); + EXPECT_FLOAT_EQ(5.0f, scale_5_13.a); + EXPECT_FLOAT_EQ(0.0f, scale_5_13.b); + EXPECT_FLOAT_EQ(0.0f, scale_5_13.c); + EXPECT_FLOAT_EQ(13.0f, scale_5_13.d); + EXPECT_FLOAT_EQ(0.0, scale_5_13.e); + EXPECT_FLOAT_EQ(0.0, scale_5_13.f); + + // Apply the transforms to points step by step. + CFX_PointF origin_transformed(0, 0); + CFX_PointF p_10_20_transformed(10, 20); + + origin_transformed = rotate_90.Transform(origin_transformed); + EXPECT_FLOAT_EQ(0.0f, origin_transformed.x); + EXPECT_FLOAT_EQ(0.0f, origin_transformed.y); + p_10_20_transformed = rotate_90.Transform(p_10_20_transformed); + EXPECT_FLOAT_EQ(-20.0f, p_10_20_transformed.x); + EXPECT_FLOAT_EQ(10.0f, p_10_20_transformed.y); + + origin_transformed = translate_23_11.Transform(origin_transformed); + EXPECT_FLOAT_EQ(23.0f, origin_transformed.x); + EXPECT_FLOAT_EQ(11.0f, origin_transformed.y); + p_10_20_transformed = translate_23_11.Transform(p_10_20_transformed); + EXPECT_FLOAT_EQ(3.0f, p_10_20_transformed.x); + EXPECT_FLOAT_EQ(21.0f, p_10_20_transformed.y); + + origin_transformed = scale_5_13.Transform(origin_transformed); + EXPECT_FLOAT_EQ(115.0f, origin_transformed.x); + EXPECT_FLOAT_EQ(143.0f, origin_transformed.y); + p_10_20_transformed = scale_5_13.Transform(p_10_20_transformed); + EXPECT_FLOAT_EQ(15.0f, p_10_20_transformed.x); + EXPECT_FLOAT_EQ(273.0f, p_10_20_transformed.y); + + // Apply the transforms to points in the reverse order. + origin_transformed = CFX_PointF(0, 0); + p_10_20_transformed = CFX_PointF(10, 20); + + origin_transformed = scale_5_13.Transform(origin_transformed); + EXPECT_FLOAT_EQ(0.0f, origin_transformed.x); + EXPECT_FLOAT_EQ(0.0f, origin_transformed.y); + p_10_20_transformed = scale_5_13.Transform(p_10_20_transformed); + EXPECT_FLOAT_EQ(50.0f, p_10_20_transformed.x); + EXPECT_FLOAT_EQ(260.0f, p_10_20_transformed.y); + + origin_transformed = translate_23_11.Transform(origin_transformed); + EXPECT_FLOAT_EQ(23.0f, origin_transformed.x); + EXPECT_FLOAT_EQ(11.0f, origin_transformed.y); + p_10_20_transformed = translate_23_11.Transform(p_10_20_transformed); + EXPECT_FLOAT_EQ(73.0f, p_10_20_transformed.x); + EXPECT_FLOAT_EQ(271.0f, p_10_20_transformed.y); + + origin_transformed = rotate_90.Transform(origin_transformed); + EXPECT_FLOAT_EQ(-11.0f, origin_transformed.x); + EXPECT_FLOAT_EQ(23.0f, origin_transformed.y); + p_10_20_transformed = rotate_90.Transform(p_10_20_transformed); + EXPECT_FLOAT_EQ(-271.0f, p_10_20_transformed.x); + EXPECT_FLOAT_EQ(73.0f, p_10_20_transformed.y); + + // Compose all transforms. + CFX_Matrix m; + m.Concat(rotate_90); + m.Concat(translate_23_11); + m.Concat(scale_5_13); + EXPECT_NEAR_FIVE_PLACES(0.0f, m.a); + EXPECT_NEAR_FIVE_PLACES(13.0f, m.b); + EXPECT_NEAR_FIVE_PLACES(-5.0f, m.c); + EXPECT_NEAR_FIVE_PLACES(0.0f, m.d); + EXPECT_FLOAT_EQ(115.0, m.e); + EXPECT_FLOAT_EQ(143.0, m.f); + + // Note how the results using the combined matrix are equal to the results + // when applying the three original matrices step-by-step. + origin_transformed = m.Transform(CFX_PointF(0, 0)); + EXPECT_FLOAT_EQ(115.0f, origin_transformed.x); + EXPECT_FLOAT_EQ(143.0f, origin_transformed.y); + + p_10_20_transformed = m.Transform(CFX_PointF(10, 20)); + EXPECT_FLOAT_EQ(15.0f, p_10_20_transformed.x); + EXPECT_FLOAT_EQ(273.0f, p_10_20_transformed.y); + + // Now compose all transforms prepending. + m.SetIdentity(); + m.Concat(rotate_90, true); + m.Concat(translate_23_11, true); + m.Concat(scale_5_13, true); + EXPECT_NEAR_FIVE_PLACES(0.0f, m.a); + EXPECT_NEAR_FIVE_PLACES(5.0f, m.b); + EXPECT_NEAR_FIVE_PLACES(-13.0f, m.c); + EXPECT_NEAR_FIVE_PLACES(0.0f, m.d); + EXPECT_FLOAT_EQ(-11.0, m.e); + EXPECT_FLOAT_EQ(23.0, m.f); + + // Note how the results using the combined matrix are equal to the results + // when applying the three original matrices step-by-step in the reverse + // order. + origin_transformed = m.Transform(CFX_PointF(0, 0)); + EXPECT_FLOAT_EQ(-11.0f, origin_transformed.x); + EXPECT_FLOAT_EQ(23.0f, origin_transformed.y); + + p_10_20_transformed = m.Transform(CFX_PointF(10, 20)); + EXPECT_FLOAT_EQ(-271.0f, p_10_20_transformed.x); + EXPECT_FLOAT_EQ(73.0f, p_10_20_transformed.y); +} + TEST(CFX_Matrix, RotateAt) { CFX_Matrix m; m.RotateAt(FX_PI, 10, 20); |