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Added a clarifying comment on the Invert versus Inverse issue

This commit is contained in:
Paolo Cignoni 2008-08-11 08:04:19 +00:00
parent 1e94f7cf46
commit 65320e40a7
1 changed files with 11 additions and 4 deletions
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15
vcg/math/matrix44.h
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@ -780,10 +780,18 @@ template <class T> Matrix44<T> &Transpose(Matrix44<T> &m) {
return m; return m;
} }
/*
To invert a matrix you can
either invert the matrix inplace calling
vcg::Invert(yourMatrix);
or get the inverse matrix of a given matrix without touching it:
invertedMatrix = vcg::Inverse(untouchedMatrix);
template <class T> Matrix44<T> &Invert(Matrix44<T> &m) { */
template <class T> Matrix44<T> & Invert(Matrix44<T> &m) {
LinearSolve<T> solve(m); LinearSolve<T> solve(m);
for(int j = 0; j < 4; j++) { //Find inverse by columns. for(int j = 0; j < 4; j++) { //Find inverse by columns.
@ -793,7 +801,6 @@ template <class T> Matrix44<T> &Invert(Matrix44<T> &m) {
for(int i = 0; i < 4; i++) for(int i = 0; i < 4; i++)
m.ElementAt(i, j) = col[i]; m.ElementAt(i, j) = col[i];
} }
return m;
} }
template <class T> Matrix44<T> Inverse(const Matrix44<T> &m) { template <class T> Matrix44<T> Inverse(const Matrix44<T> &m) {