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Bruno

matrix multiplication

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Hello, This is from the nvidia matrix class : matrix4 & mult_right( const matrix4 & b ) { matrix4 mt(*this); set_value(real(0)); for(int i=0; i < 4; i++) for(int j=0; j < 4; j++) for(int c=0; c < 4; c++) element(i,j) += mt(i,c) * b(c,j); return *this; } matrix4 & operator *= ( const matrix4 & mat ) { mult_right( mat ); return *this; } And it's used like this : matrix4f m_matrix = P * M; It's not a standard matrix * matrix operation, what are they doing here ? thanks, Bruno

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This is an ordinary matrix multiplication operation; the three loops are just a slick way to multiply everything.

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