73 lines
1.6 KiB
C++
73 lines
1.6 KiB
C++
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: Apache-2.0 */
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#include "testing/testing.h"
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#include "BLI_math_solvers.h"
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TEST(math_solvers, Tridiagonal1)
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{
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const float a[1] = {1}; // ignored
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const float b[1] = {2};
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const float c[1] = {1}; // ignored
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const float d[1] = {4};
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float x[1];
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EXPECT_TRUE(BLI_tridiagonal_solve(a, b, c, d, x, 1));
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EXPECT_FLOAT_EQ(x[0], 2);
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}
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TEST(math_solvers, Tridiagonal3)
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{
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const float a[3] = {1, 2, 3}; // 1 ignored
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const float b[3] = {4, 5, 6};
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const float c[3] = {7, 8, 9}; // 9 ignored
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const float d[3] = {18, 36, 24};
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float x[3];
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EXPECT_TRUE(BLI_tridiagonal_solve(a, b, c, d, x, 3));
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EXPECT_FLOAT_EQ(x[0], 1);
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EXPECT_FLOAT_EQ(x[1], 2);
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EXPECT_FLOAT_EQ(x[2], 3);
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}
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TEST(math_solvers, CyclicTridiagonal1)
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{
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const float a[1] = {1};
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const float b[1] = {2};
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const float c[1] = {1};
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const float d[1] = {4};
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float x[1];
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EXPECT_TRUE(BLI_tridiagonal_solve_cyclic(a, b, c, d, x, 1));
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EXPECT_FLOAT_EQ(x[0], 1);
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}
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TEST(math_solvers, CyclicTridiagonal2)
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{
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const float a[2] = {1, 2};
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const float b[2] = {3, 4};
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const float c[2] = {5, 6};
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const float d[2] = {15, 16};
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float x[2];
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EXPECT_TRUE(BLI_tridiagonal_solve_cyclic(a, b, c, d, x, 2));
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EXPECT_FLOAT_EQ(x[0], 1);
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EXPECT_FLOAT_EQ(x[1], 2);
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}
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TEST(math_solvers, CyclicTridiagonal3)
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{
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const float a[3] = {1, 2, 3};
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const float b[3] = {4, 5, 6};
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const float c[3] = {7, 8, 9};
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const float d[3] = {21, 36, 33};
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float x[3];
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EXPECT_TRUE(BLI_tridiagonal_solve_cyclic(a, b, c, d, x, 3));
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EXPECT_FLOAT_EQ(x[0], 1);
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EXPECT_FLOAT_EQ(x[1], 2);
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EXPECT_FLOAT_EQ(x[2], 3);
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}
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