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vendor/assimp/test/unit/AssimpAPITest_aiMatrix3x3.cpp

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+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2026, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+#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++;
+       }
+    }
+}