addEmptyBackgroundToSlice.m
506c043e4ebdmaster

addEmptyBackgroundToSlice.m
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			function addEmptyBackgroundToSlice(obj,height,width)
			% The background is evenly added around the slice.
			% height and width must be given in pixels.

			sliceHeight = size(obj.sliced,1);
			sliceWidth = size(obj.sliced,2);
			height = max(height,sliceHeight);
			width = max(width,sliceWidth);

			top = 1+round(height/2-sliceHeight/2);
			left = 1+round(width/2-sliceWidth/2);
			bottom = top + sliceHeight-1;
			right = left + sliceWidth-1;

			newSlice = repmat(min(obj.sliced,[],'all'),[height width]);
			newSlice(top:bottom,left:right) = obj.sliced;
			obj.sliced = newSlice;

			newSliceX = -ones(height,width);
			newSliceX(top:bottom,left:right) = obj.slicedX;
			obj.slicedX = newSliceX;

			newSliceY = -ones(height,width);
			newSliceY(top:bottom,left:right) = obj.slicedY;
			obj.slicedY = newSliceY;

			newSliceZ = -ones(height,width);
			newSliceZ(top:bottom,left:right) = obj.slicedZ;
			obj.slicedZ = newSliceZ;

			newPointsInVolume = false(height,width);
			newPointsInVolume(top:bottom,left:right) = obj.pointsInVolume;
			obj.pointsInVolume = newPointsInVolume;
			end