/usr/share/psychtoolbox-3/PsychDemos/MouseTraceDemo.m is in psychtoolbox-3-common 3.0.14.20170103+git6-g605ff5c.dfsg1-1build1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 | % MouseTraceDemo
% ___________________________________________________________________
%
% Draw a curve with the mouse.
% _______________________________________________________________________
%
% See also: PsychDemos, MouseTraceDemo2, GetMouse.
% HISTORY
% 8/12/97 dhb, wtf Wrote it.
% 8/13/97 dhb Small modifications.
% 8/15/97 dgp Drag mouse instead of clicking before and after.
% 8/07/01 awi Added font conditional, changed "button" to "buttons"
% and indexed the mouse button result for Windows.
% 4/11/01 awi Cosmetic editing of comments.
% 4/13/02 dgp Use Arial, no need for conditional.
% 11/18/04 awi Modified to make it work on OS X and renamed to MouseTraceDemoOSX.
% Changed the open command to specify double
% buffers and 32 depth because we don't yet support
% 8-bit depth on OS X.
% Double buffer the display;
% he path does not accumulate in the window so
% render the entire path on every frame, not just the
% path delta since the last segment was drawn.
% Added flip command because we are double
% buffered.
% Added try..catch to close onscreen window in
% event of failure.
% Open on the highest-numbered display and pass
% GetMouse the window pointer. Not necessary for OS
% X, but often desirable to use secondary display if
% available.
% 11/19/06 dhb Remove OSX from name.
try
% Open up a window on the screen and clear it.
whichScreen = max(Screen('Screens'));
[theWindow,theRect] = Screen('OpenWindow', whichScreen, 0);
% Move the cursor to the center of the screen
theX = round(theRect(RectRight) / 2);
theY = round(theRect(RectBottom) / 2);
SetMouse(theX,theY,whichScreen);
ShowCursor;
% Wait for a click and hide the cursor
Screen(theWindow,'FillRect',0);
Screen(theWindow,'DrawText','Drag mouse (i.e. hold button down) to draw',50,50,255);
Screen('Flip', theWindow);
while (1)
[x,y,buttons] = GetMouse(theWindow);
if buttons(1) || KbCheck
break;
end
end
Screen(theWindow,'DrawText','Drag mouse (i.e. hold button down) to draw',50,50,0);
% Loop and track the mouse, drawing the contour
[theX,theY] = GetMouse(theWindow);
thePoints = [theX theY];
Screen(theWindow,'DrawLine',255,theX,theY,theX,theY);
Screen('Flip', theWindow);
sampleTime = 0.01;
startTime = GetSecs;
nextTime = startTime+sampleTime;
while 1
[x,y,buttons] = GetMouse(theWindow);
if ~buttons(1)
break;
end
if (x ~= theX || y ~= theY)
[numPoints, two]=size(thePoints);
for i= 1:numPoints-1
Screen(theWindow,'DrawLine',128,thePoints(i,1),thePoints(i,2),thePoints(i+1,1),thePoints(i+1,2));
end
Screen('Flip', theWindow);
theX = x; theY = y;
end
if (GetSecs > nextTime)
thePoints = [thePoints ; x y];
nextTime = nextTime+sampleTime;
end
end
% Close up
sca;
% Plot the contour in a Matlab figure
plot(thePoints(:,1),theRect(RectBottom)-thePoints(:,2));
catch
sca;
psychrethrow(psychlasterror);
end %try..catch..
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