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validated matrix multiplication

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This commit is contained in:
Hartmut Seichter 2018-04-04 11:33:19 +02:00
parent 75fb4c27f7
commit d33a00721a
2 changed files with 21 additions and 7 deletions
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14
src/core/include/pw/core/matrix.hpp
View file

@ -94,14 +94,13 @@ public:
matrix<R,C,T>& operator *= (const matrix<R,C,T>& rhs);
matrix<R,C,T>& copyFrom(const T* src) { for (unsigned int i = 0; i < R*C; ++i) { (*this).at(i) = src[i]; } return *this; }
matrix<R,C,T>& copy_from_data(const T* src) { for (unsigned int i = 0; i < R*C; ++i) { (*this).at(i) = src[i]; } return *this; }
matrix<R,C,T> operator * (const matrix<R,C,T>& rhs) const {
return mul(*this,rhs);
}
matrix<C,R,T>
reshape() const {
const matrix<C,R,T> reshape() const {
matrix<C,R,T> m;
for (unsigned int r = 0; r < R; ++r)
for (unsigned int c = 0; c < C; ++c)
@ -109,12 +108,12 @@ public:
return m;
}
matrix<R,1,T> getColumn(unsigned int col) const {
const matrix<R,1,T> get_column(unsigned int col) const {
matrix<R,1,T> c; for (unsigned int r = 0; r < R; ++r) c(r,0) = (this)(r,col);
return c;
}
matrix<1,C,T> getRow(unsigned int row) const {
const matrix<1,C,T> get_row(unsigned int row) const {
matrix<1,C,T> r; for (unsigned int c = 0; c < C; ++c) r(0,c) = (this)(row,c);
return r;
}
@ -180,14 +179,15 @@ mul(const matrix<aR,aCbR,T>& A, const matrix<aCbR,bC,T>& B)
{
// aC == bR
// set all null
matrix<aR,bC,T> res = matrix<aR,bC,T>::All(0);
matrix<aR,bC,T> res;
res.fill(0);
// compute all resulting cells
for (unsigned int r = 0; r < aR; ++r) {
for (unsigned int c = 0; c < bC; ++c) {
// building inner product
for (unsigned int iI = 0; iI < aCbR;iI++) {
res(r,c) += A(r,iI) * B(iI,c);
res.at(r,c) += A.at(r,iI) * B.at(iI,c);
}
}
}

14
src/core/tests/pwcore_test_matrix.cpp
View file

@ -33,5 +33,19 @@ int main(int argc,char **argv) {
std::cout << "mscale = " << pw::serialize::matrix(mscale) << std::endl;
pw::matrix44d a;
for (int r = 0; r < m.rows(); r++) {
for (int c = 0; c < m.cols(); c++) {
a.at(r,c) = r * m.cols() + c;
}
}
std::cout << "a = " << pw::serialize::matrix(a) << std::endl;
pw::matrix44d r = a * mscale;
std::cout << "a * mscale = " << pw::serialize::matrix(r) << std::endl;
return 0;
}