comparison armadillo-3.900.4/include/armadillo_bits/glue_cross_meat.hpp @ 49:1ec0e2823891

Switch to using subrepo copies of qm-dsp, nnls-chroma, vamp-plugin-sdk; update Armadillo version; assume build without external BLAS/LAPACK

+// Copyright (C) 2010-2013 NICTA (www.nicta.com.au)
+// Copyright (C) 2010-2013 Conrad Sanderson
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+
+//! \addtogroup glue_cross
+//! @{
+
+
+
+template<typename T1, typename T2>
+inline
+void
+glue_cross::apply(Mat<typename T1::elem_type>& out, const Glue<T1, T2, glue_cross>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const Proxy<T1> PA(X.A);
+  const Proxy<T2> PB(X.B);
+  
+  arma_debug_check( ((PA.get_n_elem() != 3) || (PB.get_n_elem() != 3)), "cross(): input vectors must have 3 elements" );
+  
+  const uword PA_n_rows = Proxy<T1>::is_row ? 1 : PA.get_n_rows();
+  const uword PA_n_cols = Proxy<T1>::is_col ? 1 : PA.get_n_cols();
+  
+  out.set_size(PA_n_rows, PA_n_cols);
+  
+  eT* out_mem = out.memptr();
+  
+  if( (Proxy<T1>::prefer_at_accessor == false) && (Proxy<T2>::prefer_at_accessor == false) )
+    {
+    typename Proxy<T1>::ea_type A = PA.get_ea();
+    typename Proxy<T2>::ea_type B = PB.get_ea();
+    
+    const eT ax = A[0];
+    const eT ay = A[1];
+    const eT az = A[2];
+    
+    const eT bx = B[0];
+    const eT by = B[1];
+    const eT bz = B[2];
+    
+    out_mem[0] = ay*bz - az*by;
+    out_mem[1] = az*bx - ax*bz;
+    out_mem[2] = ax*by - ay*bx;
+    }
+  else
+    {
+    const bool PA_is_col = Proxy<T1>::is_col ? true : (PA_n_cols       == 1);
+    const bool PB_is_col = Proxy<T2>::is_col ? true : (PB.get_n_cols() == 1);
+    
+    const eT ax = PA.at(0,0);
+    const eT ay = PA_is_col ? PA.at(1,0) : PA.at(0,1);
+    const eT az = PA_is_col ? PA.at(2,0) : PA.at(0,2);
+    
+    const eT bx = PB.at(0,0);
+    const eT by = PB_is_col ? PB.at(1,0) : PB.at(0,1);
+    const eT bz = PB_is_col ? PB.at(2,0) : PB.at(0,2);
+    
+    out_mem[0] = ay*bz - az*by;
+    out_mem[1] = az*bx - ax*bz;
+    out_mem[2] = ax*by - ay*bx;
+    }
+  }
+
+
+
+//! @}