psychtoolbox-3-common 3.0.9+svn2579.dfsg1-1 / usr / share / psychtoolbox-3 / PsychRects / CenterRectOnPointd.m

function newRect = CenterRectOnPointd(rect,x,y)
% newRect = CenterRectOnPointd(rect,x,y)
% 
% CenterRectOnPointd offsets the rect to center it around an x and y position.
% The center of the rect is reported by RectCenterd. This is the same as
% CenterRectOnPoint, just that it returns floating point results instead of
% results that are rounded to integral pixel positions.
% 
% See also PsychRects, RectCenter, RectCenterd

% 9/13/99      Allen Ingling wrote it
% 10/6/99  dgp With permission from Allen, changed name from "PinRect", which 
%            conflicts with Apple's very different PinRect QuickDraw function, 
%            to CenterRectOnPoint. Simplified code.
% 5/18/08 mk Vectorized, ans uses RectCenterd for non-integral results.

[cX,cY] = RectCenterd(rect);
newRect=OffsetRect(rect,x-cX,y-cY);