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Diffstat (limited to 'tests/gtests/blenlib/BLI_math_matrix_test.cc')
-rw-r--r-- | tests/gtests/blenlib/BLI_math_matrix_test.cc | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/tests/gtests/blenlib/BLI_math_matrix_test.cc b/tests/gtests/blenlib/BLI_math_matrix_test.cc deleted file mode 100644 index 9c47c02ceaf..00000000000 --- a/tests/gtests/blenlib/BLI_math_matrix_test.cc +++ /dev/null @@ -1,99 +0,0 @@ -/* Apache License, Version 2.0 */ - -#include "testing/testing.h" - -#include "BLI_math_matrix.h" - -TEST(math_matrix, interp_m4_m4m4_regular) -{ - /* Test 4x4 matrix interpolation without singularity, i.e. without axis flip. */ - - /* Transposed matrix, so that the code here is written in the same way as print_m4() outputs. */ - /* This matrix represents T=(0.1, 0.2, 0.3), R=(40, 50, 60) degrees, S=(0.7, 0.8, 0.9) */ - float matrix_a[4][4] = { - {0.224976f, -0.333770f, 0.765074f, 0.100000f}, - {0.389669f, 0.647565f, 0.168130f, 0.200000f}, - {-0.536231f, 0.330541f, 0.443163f, 0.300000f}, - {0.000000f, 0.000000f, 0.000000f, 1.000000f}, - }; - transpose_m4(matrix_a); - - float matrix_i[4][4]; - unit_m4(matrix_i); - - float result[4][4]; - const float epsilon = 1e-6; - interp_m4_m4m4(result, matrix_i, matrix_a, 0.0f); - EXPECT_M4_NEAR(result, matrix_i, epsilon); - - interp_m4_m4m4(result, matrix_i, matrix_a, 1.0f); - EXPECT_M4_NEAR(result, matrix_a, epsilon); - - /* This matrix is based on the current implementation of the code, and isn't guaranteed to be - * correct. It's just consistent with the current implementation. */ - float matrix_halfway[4][4] = { - {0.690643f, -0.253244f, 0.484996f, 0.050000f}, - {0.271924f, 0.852623f, 0.012348f, 0.100000f}, - {-0.414209f, 0.137484f, 0.816778f, 0.150000f}, - {0.000000f, 0.000000f, 0.000000f, 1.000000f}, - }; - - transpose_m4(matrix_halfway); - interp_m4_m4m4(result, matrix_i, matrix_a, 0.5f); - EXPECT_M4_NEAR(result, matrix_halfway, epsilon); -} - -TEST(math_matrix, interp_m3_m3m3_singularity) -{ - /* A singluarity means that there is an axis mirror in the rotation component of the matrix. This - * is reflected in its negative determinant. - * - * The interpolation of 4x4 matrices performs linear interpolation on the translation component, - * and then uses the 3x3 interpolation function to handle rotation and scale. As a result, this - * test for a singularity in the rotation matrix only needs to test the 3x3 case. */ - - /* Transposed matrix, so that the code here is written in the same way as print_m4() outputs. */ - /* This matrix represents R=(4, 5, 6) degrees, S=(-1, 1, 1) */ - float matrix_a[3][3] = { - {-0.990737f, -0.098227f, 0.093759f}, - {-0.104131f, 0.992735f, -0.060286f}, - {0.087156f, 0.069491f, 0.993768f}, - }; - transpose_m3(matrix_a); - EXPECT_NEAR(-1.0f, determinant_m3_array(matrix_a), 1e-6); - - /* This matrix represents R=(0, 0, 0), S=(-1, 0, 0) */ - float matrix_b[3][3] = { - {-1.0f, 0.0f, 0.0f}, - {0.0f, 1.0f, 0.0f}, - {0.0f, 0.0f, 1.0f}, - }; - transpose_m3(matrix_b); - - float result[3][3]; - interp_m3_m3m3(result, matrix_a, matrix_b, 0.0f); - EXPECT_M3_NEAR(result, matrix_a, 1e-5); - - interp_m3_m3m3(result, matrix_a, matrix_b, 1.0f); - EXPECT_M3_NEAR(result, matrix_b, 1e-5); - - interp_m3_m3m3(result, matrix_a, matrix_b, 0.5f); - float expect[3][3] = { - {-0.997681f, -0.049995f, 0.046186f}, - {-0.051473f, 0.998181f, -0.031385f}, - {0.044533f, 0.033689f, 0.998440f}, - }; - transpose_m3(expect); - EXPECT_M3_NEAR(result, expect, 1e-5); - - /* Interpolating between a matrix with and without axis flip can cause it to go through a zero - * point. The determinant det(A) of a matrix represents the change in volume; interpolating - * between matrices with det(A)=-1 and det(B)=1 will have to go through a point where - * det(result)=0, so where the volume becomes zero. */ - float matrix_i[3][3]; - unit_m3(matrix_i); - zero_m3(expect); - interp_m3_m3m3(result, matrix_a, matrix_i, 0.5f); - EXPECT_NEAR(0.0f, determinant_m3_array(result), 1e-5); - EXPECT_M3_NEAR(result, expect, 1e-5); -} |