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Removed the use of register hint and cleaned up indentation

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This commit is contained in:
Robert Osfield 2016-06-04 18:40:37 +01:00
parent c3f55ad1d8
commit 0a95fd875d
1 changed files with 13 additions and 11 deletions
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24
src/osg/Matrix_implementation.cpp
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@ -618,24 +618,26 @@ bool Matrix_implementation::invert_4x3( const Matrix_implementation& mat )
return invert_4x3(tm);
}
register value_type r00, r01, r02,
r10, r11, r12,
r20, r21, r22;
// Copy rotation components directly into registers for speed
r00 = mat._mat[0][0]; r01 = mat._mat[0][1]; r02 = mat._mat[0][2];
r10 = mat._mat[1][0]; r11 = mat._mat[1][1]; r12 = mat._mat[1][2];
r20 = mat._mat[2][0]; r21 = mat._mat[2][1]; r22 = mat._mat[2][2];
value_type r00 = mat._mat[0][0];
value_type r01 = mat._mat[0][1];
value_type r02 = mat._mat[0][2];
value_type r10 = mat._mat[1][0];
value_type r11 = mat._mat[1][1];
value_type r12 = mat._mat[1][2];
value_type r20 = mat._mat[2][0];
value_type r21 = mat._mat[2][1];
value_type r22 = mat._mat[2][2];
// Partially compute inverse of rot
// Partially compute inverse of rot
_mat[0][0] = r11*r22 - r12*r21;
_mat[0][1] = r02*r21 - r01*r22;
_mat[0][2] = r01*r12 - r02*r11;
// Compute determinant of rot from 3 elements just computed
register value_type one_over_det = 1.0/(r00*_mat[0][0] + r10*_mat[0][1] + r20*_mat[0][2]);
// Compute determinant of rot from 3 elements just computed
value_type one_over_det = 1.0/(r00*_mat[0][0] + r10*_mat[0][1] + r20*_mat[0][2]);
r00 *= one_over_det; r10 *= one_over_det; r20 *= one_over_det; // Saves on later computations
// Finish computing inverse of rot
// Finish computing inverse of rot
_mat[0][0] *= one_over_det;
_mat[0][1] *= one_over_det;
_mat[0][2] *= one_over_det;