vrotation

PURPOSE ^

This function rotates an entrire matrix by the angle phi (in radians).

SYNOPSIS ^

function [rx, ry, rz] = vrotation(X,Y,Z,phi)

DESCRIPTION ^

 This function rotates an entrire matrix by the angle phi (in radians). 
 The output are the new vector head coordinates for each element in the 
 matrix. The required inputs (ie, X, Y, and Z matrices) must be the same 
 dimensions.
 
 For a discussion on how vector rotation works, see: 
         http://www.kwon3d.com/theory/transform/rot.html

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 function [rx, ry, rz] = vrotation(X,Y,Z,phi)
0002 
0003 % This function rotates an entrire matrix by the angle phi (in radians).
0004 % The output are the new vector head coordinates for each element in the
0005 % matrix. The required inputs (ie, X, Y, and Z matrices) must be the same
0006 % dimensions.
0007 %
0008 % For a discussion on how vector rotation works, see:
0009 %         http://www.kwon3d.com/theory/transform/rot.html
0010 
0011 % Written by:
0012 % Frank L. Engel (fengel2@illinois.edu)
0013 
0014 % Last edited: 8/26/2009
0015 
0016 
0017 % Rotation matrix
0018 Rz = [cos(phi) -sin(phi) 0;...
0019     sin(phi) cos(phi) 0;...
0020     0 0 1];
0021 
0022 % Rotate every element in the matrix
0023 for i=1:size(X,2)
0024     for j = 1:size(X,1)
0025         XYZ = [X(j,i);Y(j,i);Z(j,i)];
0026         Rotated = Rz*XYZ;
0027         rx(j,i) = Rotated(1);
0028         ry(j,i) = Rotated(2);
0029         rz(j,i) = Rotated(3);
0030     end
0031 end

Generated on Thu 21-Aug-2014 10:40:31 by m2html © 2005