putline.m

Univ. of Calgary CREWS的免费地震研究软件

function h=putline(xnot,ynot,slope,length,color)

% h=putline(xnot,ynot,slope,length,color)
% h=putline(xnot,ynot,length,slope)
%
% PUTLINE draws a line in the current axes at the point (xnot,ynot) having
% slope 'slope' and length 'length'. Color is a normal matlab color
% spec giving the color. The return value is the handle of the line.
%
% G.F. Margrave November, 1993
% 
% NOTE: It is illegal for you to use this software for a purpose other
% than non-profit education or research UNLESS you are employed by a CREWES
% Project sponsor. By using this software, you are agreeing to the terms
% detailed in this software's Matlab source file.
 
% BEGIN TERMS OF USE LICENSE
%
% This SOFTWARE is maintained by the CREWES Project at the Department
% of Geology and Geophysics of the University of Calgary, Calgary,
% Alberta, Canada.  The copyright and ownership is jointly held by 
% its author (identified above) and the CREWES Project.  The CREWES 
% project may be contacted via email at:  [e-mail]
% 
% The term 'SOFTWARE' refers to the Matlab source code, translations to
% any other computer language, or object code
%
% Terms of use of this SOFTWARE
%
% 1) Use of this SOFTWARE by any for-profit commercial organization is
%    expressly forbidden unless said organization is a CREWES Project
%    Sponsor.
%
% 2) A CREWES Project sponsor may use this SOFTWARE under the terms of the 
%    CREWES Project Sponsorship agreement.
%
% 3) A student or employee of a non-profit educational institution may 
%    use this SOFTWARE subject to the following terms and conditions:
%    - this SOFTWARE is for teaching or research purposes only.
%    - this SOFTWARE may be distributed to other students or researchers 
%      provided that these license terms are included.
%    - reselling the SOFTWARE, or including it or any portion of it, in any
%      software that will be resold is expressly forbidden.
%    - transfering the SOFTWARE in any form to a commercial firm or any 
%      other for-profit organization is expressly forbidden.
%
% END TERMS OF USE LICENSE

	theta=atan(slope);

	delta=abs(length*cos(theta)/2.);

	x1=xnot-delta;
	x2=xnot+delta;

	y1=slope*(x1-xnot)+ynot;
	y2=slope*(x2-xnot)+ynot;

	if( nargin > 4)
		h=line([x1 x2],[y1 y2],'color',color);
	else
		h=line([x1 x2],[y1 y2]);
	end