www.pudn.com > ekfcode.zip > get_beacons.m

function beacons=get_beacons 
% 
%  beacons=get_beacons 
% 
% HDW 28/04/00 
% function to graphically input beacon locations 
% beacons is 2*N matrix containing x,y locations of beacons 
 
 
% set up the figure 
 
globals; 
figure(PLAN_FIG) 
clf 
v=[0 WORLD_SIZE 0 WORLD_SIZE]; 
axis(v); 
hold on; 
bin=1; 
nbeacons=0; 
beacons=zeros(1,2); 
 
% now get beacons graphically until return  
while bin 
   [x,y]=ginput(1); 
   bin= ~isempty(x); 
   if bin 
      nbeacons=nbeacons+1; 
      plot(x,y,'go') 
      beacons(nbeacons,1)=x; 
      beacons(nbeacons,2)=y; 
   end 
end 
hold off