[Olena-patches] cleanup-2008 2208: Update rotation.

https://svn.lrde.epita.fr/svn/oln/branches/cleanup-2008/milena Index: ChangeLog from Ugo Jardonnet &lt;ugo.jardonnet(a)lrde.epita.fr&gt; Update rotation. * mln/fun/x2x/rotation.hh (give_h_mat): Add function. rotation.hh | 99 ++++++++++++++++++++++++++++++++++++++++++------------------ 1 file changed, 70 insertions(+), 29 deletions(-) Index: mln/fun/x2x/rotation.hh --- mln/fun/x2x/rotation.hh (revision 2207) +++ mln/fun/x2x/rotation.hh (working copy) @@ -48,6 +48,76 @@ namespace x2x { + namespace internal + { + template < unsigned n, typename C > + algebra::h_mat<n+1, C> + get_h_mat(const float alpha_, const algebra::vec<3,C>& axis_ + { + assert(!"get_h_mat : n not implemented"); + } + + template <typename C > + algebra::h_mat<4, C> + get_h_mat(const float alpha_, const algebra::vec<3,C>& axis_) + { + algebra::h_mat<4, C> m_; + + const float cos_a = cos(alpha_); + const float sin_a = sin(alpha_); + const float u = axis_[0]; + const float v = axis_[1]; + const float w = axis_[2]; + const float u2 = u * u; + const float v2 = v * v; + const float w2 = w * w; + const float uvw2 = u2 + v2 + w2; + + m_(0,0) = (u2 + (v2 + w2) * cos_a) / uvw2; + m_(0,1) = (u*v * (1 - cos_a) - u * math::sqrt(uvw2) * sin_a) / uvw2; + m_(0,2) = (u*w * (1 - cos_a) + v * math::sqrt(uvw2) * sin_a) / uvw2; + m_(0,3) = 0; + + m_(1,0) = (u*v * (1 - cos_a) + w * math::sqrt(uvw2) * sin_a) / uvw2; + m_(1,1) = (v2 + (u2 + w2) * cos_a) / uvw2; + m_(1,2) = (v*w * (1 - cos_a) - u * math::sqrt(uvw2) * sin_a) / uvw2; + m_(1,3) = 0; + + m_(2,0) = (u*w * (1 - cos_a) - v * math::sqrt(uvw2) * sin_a) / uvw2; + m_(2,1) = (v*w * (1 - cos_a) + u * math::sqrt(uvw2) * sin_a) / uvw2; + m_(2,1) = (u2 + (u2 + v2) * cos_a) / uvw2; + m_(2,3) = 0; + + m_(2,0) = 0; + m_(2,1) = 0; + m_(2,1) = 0; + m_(2,3) = 1; + + return m_; + } + + template <typename C > + algebra::h_mat<3, C> + get_h_mat(const float alpha_, const algebra::vec<2,C>& axis_ + { + algebra::h_mat<3, C> m_; + const float cos_a = cos(alpha_); + const float sin_a = sin(alpha_); + const algebra::vec<4,float> vec + = make::vec(cos_a, -sin_a, sin_a, cos_a); + unsigned k = 0; + for (unsigned i = 0; i < 3; ++i) + for (unsigned j = 0; j < 3; ++j) + { + if (j != this->dir_ && i != this->dir_) + this->m_(i, j) = vec[k++]; + else + this->m_(i, j) = (i == j); + } + } + } + + /*! \brief Represent a rotation function. * */ @@ -159,35 +229,6 @@ rotation<n,C>::update() { assert(n == 3); // debug - const float cos_a = cos(alpha_); - const float sin_a = sin(alpha_); - const float u = axis_[0]; - const float v = axis_[1]; - const float w = axis_[2]; - const float u2 = u * u; - const float v2 = v * v; - const float w2 = w * w; - const float uvw2 = u2 + v2 + w2; - - this->m_(0,0) = (u2 + (v2 + w2) * cos_a) / uvw2; - this->m_(0,1) = (u*v * (1 - cos_a) - u * math::sqrt(uvw2) * sin_a) / uvw2; - this->m_(0,2) = (u*w * (1 - cos_a) + v * math::sqrt(uvw2) * sin_a) / uvw2; - this->m_(0,3) = 0; - - this->m_(1,0) = (u*v * (1 - cos_a) + w * math::sqrt(uvw2) * sin_a) / uvw2; - this->m_(1,1) = (v2 + (u2 + w2) * cos_a) / uvw2; - this->m_(1,2) = (v*w * (1 - cos_a) - u * math::sqrt(uvw2) * sin_a) / uvw2; - this->m_(1,3) = 0; - - this->m_(2,0) = (u*w * (1 - cos_a) - v * math::sqrt(uvw2) * sin_a) / uvw2; - this->m_(2,1) = (v*w * (1 - cos_a) + u * math::sqrt(uvw2) * sin_a) / uvw2; - this->m_(2,1) = (u2 + (u2 + v2) * cos_a) / uvw2; - this->m_(2,3) = 0; - - this->m_(2,0) = 0; - this->m_(2,1) = 0; - this->m_(2,1) = 0; - this->m_(2,3) = 1; }