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Fixed element for lower triangular part of BTDMatrix #6050

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Fixed element for lower triangular part of BTDMatrix #6050

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2 changes: 1 addition & 1 deletion Sofa/framework/LinearAlgebra/src/sofa/linearalgebra/BTDMatrix.inl
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Original file line number Diff line number Diff line change
Expand Up @@ -121,7 +121,7 @@ SReal BTDMatrix<N, T>::element(Index i, Index j) const
const Index bi = i / BSIZE; i = i % BSIZE;
const Index bj = j / BSIZE; j = j % BSIZE;
const Index bindex = bj - bi + 1;
if (bindex >= 3) return (SReal)0;
if (bindex >= 3 || bindex < 0) return (SReal)0;
return data[bi*3+bindex](i,j);
}

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