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In the camera metaphor, a dolly is a stage that enables movement of the camera from side to side with respect to the scene. The camdolly command implements similar behavior by moving both the position of the camera and the position of the camera target in unison (or just the camera position if you so desire).
This example illustrates how to use camdolly to explore different regions of an image. It shows how to use the following functions:
First load the Cape Cod image and zoom in by setting the camera view angle (using camva).
load cape image(X) colormap(map) axis image camva(camva/2.5)
Then use ginput to select the x- and y-coordinates of the camera target and camera position.
while 1 [x,y] = ginput(1); if ~strcmp(get(gcf,'SelectionType'),'normal') break end ct = camtarget; dx = x - ct(1); dy = y - ct(2); camdolly(dx,dy,ct(3),'movetarget','data') drawnow end