vb_cross2

PURPOSE

SYNOPSIS

DESCRIPTION

 Fast calculation of cross product
 c = vb_cross2(a,b)
 c = a x b
 a, b , c : N x 3 

 Copyright (C) 2011, ATR All Rights Reserved.
 License : New BSD License(see VBMEG_LICENSE.txt)

CROSS-REFERENCE INFORMATION

• vb_calc_patch_area --- get area of patches
• vb_mesh_area area of patch triangle
• vb_solid_angle_check total solid angle for surface
• vb_surf_smooth smoothing surface by spring model
• vb_surf_smooth_data smoothing surface by spring model and 3D-image data
• vb_surf_smooth_fit Fit surface to the boundary of the mask
• vb_surf_smooth_out Fit surface to the boundary of the mask
• vb_triangle_normal normal vector of patch triangle
• vb_bem_meg_linear_grk magnetic field by using BEM method
• vb_sensor_mag 境界三角形 (x1, x2, x3) の単位電流 が X に作る磁場の Q 方向射影
• vb_solid_angle_grk solid angle calculation by Gararkin method
• vb_solid_other solid angle calculation by Gararkin method
• vb_bem_eeg_linear_grk EEG potencial for multilayer model
• vb_make_fullsphere Make vertex points on a sphere
• vb_make_halfsphere 球面三角分割
• make_orthogonal_vec make orthogonal vector to dX in 3D space
• make_orthogonal_vec_old make orthogonal vector to dX in 3D space
• plane_cross_section Find the shortest path from V1 to V2 along surface

SOURCE CODE

0001 function    c = vb_cross2(a,b)
0002 % Fast calculation of cross product
0003 % c = vb_cross2(a,b)
0004 % c = a x b
0005 % a, b , c : N x 3
0006 %
0007 % Copyright (C) 2011, ATR All Rights Reserved.
0008 % License : New BSD License(see VBMEG_LICENSE.txt)
0009 
0010 c = [a(:,2).*b(:,3)-a(:,3).*b(:,2), ...
0011      a(:,3).*b(:,1)-a(:,1).*b(:,3), ...
0012      a(:,1).*b(:,2)-a(:,2).*b(:,1)];