assimp/test/unit/AssimpAPITest_aiMatrix3x3.cpp

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#include "UnitTestPCH.h"
#include "MathTest.h"
#include <array>

using namespace Assimp;

class AssimpAPITest_aiMatrix3x3 : public AssimpMathTest {
protected:
    void SetUp() override {
        result_c = result_cpp = aiMatrix3x3();
    }

    aiMatrix3x3 result_c, result_cpp;
};

TEST_F(AssimpAPITest_aiMatrix3x3, aiIdentityMatrix3Test) {
    // Force a non-identity matrix.
    result_c = aiMatrix3x3(0,0,0,0,0,0,0,0,0);
    aiIdentityMatrix3(&result_c);
    EXPECT_EQ(result_cpp, result_c);
}

TEST_F(AssimpAPITest_aiMatrix3x3, aiMatrix3FromMatrix4Test) {
    const auto m = random_mat4();
    result_cpp = aiMatrix3x3(m);
    aiMatrix3FromMatrix4(&result_c, &m);
    EXPECT_EQ(result_cpp, result_c);
}

TEST_F(AssimpAPITest_aiMatrix3x3, aiMatrix3FromQuaternionTest) {
    const auto q = random_quat();
    result_cpp = q.GetMatrix();
    aiMatrix3FromQuaternion(&result_c, &q);
    EXPECT_EQ(result_cpp, result_c);
}

TEST_F(AssimpAPITest_aiMatrix3x3, aiMatrix3AreEqualTest) {
    result_c = result_cpp = random_mat3();
    EXPECT_EQ(result_cpp == result_c,
        (bool)aiMatrix3AreEqual(&result_cpp, &result_c));
}

TEST_F(AssimpAPITest_aiMatrix3x3, aiMatrix3AreEqualEpsilonTest) {
    result_c = result_cpp = random_mat3();
    EXPECT_EQ(result_cpp.Equal(result_c, Epsilon),
        (bool)aiMatrix3AreEqualEpsilon(&result_cpp, &result_c, Epsilon));
}

TEST_F(AssimpAPITest_aiMatrix3x3, aiMultiplyMatrix3Test) {
    const auto m = random_mat3();
    result_c = result_cpp = random_mat3();
    result_cpp *= m;
    aiMultiplyMatrix3(&result_c, &m);
    EXPECT_EQ(result_cpp, result_c);
}

TEST_F(AssimpAPITest_aiMatrix3x3, aiTransposeMatrix3Test) {
    result_c = result_cpp = random_mat3();
    result_cpp.Transpose();
    aiTransposeMatrix3(&result_c);
    EXPECT_EQ(result_cpp, result_c);
}

TEST_F(AssimpAPITest_aiMatrix3x3, aiMatrix3InverseTest) {
    // Use a predetermined matrix to prevent arbitrary
    // cases where it could have a null determinant.
    result_c = result_cpp = aiMatrix3x3(
        5, 2, 7,
        4, 6, 9,
        1, 8, 3);
    result_cpp.Inverse();
    aiMatrix3Inverse(&result_c);
    EXPECT_EQ(result_cpp, result_c);
}

inline void AI_EXPECT_REAL_EQ(ai_real val1, ai_real val2) {
#ifdef ASSIMP_DOUBLE_PRECISION
    EXPECT_DOUBLE_EQ((val1), (val2));
#else
    EXPECT_FLOAT_EQ((val1), (val2));
#endif
}

TEST_F(AssimpAPITest_aiMatrix3x3, aiMatrix3DeterminantTest) {
    result_c = result_cpp = random_mat3();
    const ai_real det_1 = result_cpp.Determinant();
    const ai_real det_2 = aiMatrix3Determinant(&result_c);
    AI_EXPECT_REAL_EQ(det_1, det_2);
}

TEST_F(AssimpAPITest_aiMatrix3x3, aiMatrix3RotationZTest) {
    const float angle(RandPI.next());
    aiMatrix3x3::RotationZ(angle, result_cpp);
    aiMatrix3RotationZ(&result_c, angle);
    EXPECT_EQ(result_cpp, result_c);
}

TEST_F(AssimpAPITest_aiMatrix3x3, aiMatrix3FromRotationAroundAxisTest) {
    const float angle(RandPI.next());
    const auto axis = random_unit_vec3();
    aiMatrix3x3::Rotation(angle, axis, result_cpp);
    aiMatrix3FromRotationAroundAxis(&result_c, &axis, angle);
    EXPECT_EQ(result_cpp, result_c);
}

TEST_F(AssimpAPITest_aiMatrix3x3, aiMatrix3TranslationTest) {
    const auto axis = random_vec2();
    aiMatrix3x3::Translation(axis, result_cpp);
    aiMatrix3Translation(&result_c, &axis);
    EXPECT_EQ(result_cpp, result_c);
}

TEST_F(AssimpAPITest_aiMatrix3x3, aiMatrix3FromToTest) {
    // Use predetermined vectors to prevent running into division by zero.
    const auto from = aiVector3D(1,2,1).Normalize(), to = aiVector3D(-1,1,1).Normalize();
    aiMatrix3x3::FromToMatrix(from, to, result_cpp);
    aiMatrix3FromTo(&result_c, &from, &to);
    EXPECT_TRUE(result_cpp.Equal(result_c, Epsilon));
}

TEST_F(AssimpAPITest_aiMatrix3x3, operatorTest) {
    std::array<ai_real, 9> value = { 1, 2, 3, 4, 5, 6, 7, 8,9};
    result_cpp = aiMatrix3x3( value[0], value[1], value[2], value[3],
                              value[4], value[5], value[6], value[7],
                              value[8]);
    size_t idx=0;
    for (unsigned int i = 0; i < 3; ++i) {
       for (unsigned int j = 0; j < 3; ++j) {
            ai_real curValue = result_cpp[i][j];
            EXPECT_EQ(curValue, value[idx]);
            idx++;
       }
    }
}