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modify code in the Matrix2x2 class

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This commit is contained in:
Daniel Chappuis 2013-05-09 19:47:09 +02:00
parent 7a2c2bdbd5
commit f23096af50
2 changed files with 13 additions and 15 deletions
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4
src/mathematics/Matrix2x2.cpp
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@ -80,9 +80,7 @@ Matrix2x2 Matrix2x2::getInverse() const {
decimal invDeterminant = decimal(1.0) / determinant;
// TODO : Implement this
assert(false);
Matrix2x2 tempMatrix;
Matrix2x2 tempMatrix(mRows[1][1], -mRows[0][1], -mRows[1][0], mRows[0][0]);
// Return the inverse matrix
return (invDeterminant * tempMatrix);

24
test/tests/mathematics/TestMatrix2x2.h
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@ -57,7 +57,6 @@ class TestMatrix2x2 : public Test {
TestMatrix2x2() : mIdentity(Matrix2x2::identity()),
mMatrix1(2, 24, -4, 5) {
}
/// Run the tests
@ -147,21 +146,22 @@ class TestMatrix2x2 : public Test {
test(mIdentity.getDeterminant() == 1);
// Test inverse
Matrix2x2 inverseMatrix = matrix.getInverse();
test(approxEqual(inverseMatrix[0][0], decimal(0.056369), decimal(10e-6)));
test(approxEqual(inverseMatrix[0][1], decimal(-0.049549), decimal(10e-6)));
test(approxEqual(inverseMatrix[1][0], decimal(0.029460), decimal(10e-6)));
test(approxEqual(inverseMatrix[1][1], decimal(0.038575), decimal(10e-6)));
Matrix2x2 matrix2(1, 2, 3, 4);
Matrix2x2 inverseMatrix = matrix2.getInverse();
test(approxEqual(inverseMatrix[0][0], decimal(-2), decimal(10e-6)));
test(approxEqual(inverseMatrix[0][1], decimal(1), decimal(10e-6)));
test(approxEqual(inverseMatrix[1][0], decimal(-0.75), decimal(10e-6)));
test(approxEqual(inverseMatrix[1][1], decimal(0.25), decimal(10e-6)));
Matrix2x2 inverseMatrix1 = mMatrix1.getInverse();
test(approxEqual(inverseMatrix1[0][0], decimal(0.030232), decimal(10e-6)));
test(approxEqual(inverseMatrix1[0][1], decimal(0.015676), decimal(10e-6)));
test(approxEqual(inverseMatrix1[1][0], decimal(-0.057410), decimal(10e-6)));
test(approxEqual(inverseMatrix1[1][1], decimal(0.039088), decimal(10e-6)));
test(approxEqual(inverseMatrix1[0][0], decimal(0.04716981), decimal(10e-6)));
test(approxEqual(inverseMatrix1[0][1], decimal(-0.2264150), decimal(10e-6)));
test(approxEqual(inverseMatrix1[1][0], decimal(0.0377358), decimal(10e-6)));
test(approxEqual(inverseMatrix1[1][1], decimal(0.0188679), decimal(10e-6)));
// Test absolute matrix
Matrix2x2 matrix2(-2, -3, -4, -5);
Matrix2x2 matrix3(-2, -3, -4, -5);
test(matrix.getAbsoluteMatrix() == Matrix2x2(24, 64, 253, 35));
Matrix2x2 absoluteMatrix = matrix2.getAbsoluteMatrix();
Matrix2x2 absoluteMatrix = matrix3.getAbsoluteMatrix();
test(absoluteMatrix == Matrix2x2(2, 3, 4, 5));
}