Every now and then your crude and harsh Matlab plots can benefit from some graphical enhancements. This class adds a fully customisable dropshadow to the plot objects in your axes. It takes a "snapshot" of the current axes and renders a dropshadow image using 2D convolution with a Gaussian kernel. Still, the figure can be exported to a vector graphics format, making it ideal for printed reports or PDFs.
ShadowObj = dropshadow(hAxes) creates a dropshadow object for the plot objects in the specified axes. The shadow image is rendered using 2D convolution of a Gaussian kernel based on the properties Color, Angle, Distance, Spread and Size. The original plot objects are kept, such that the figure can still be exported to a vector graphics format such as EPS or PDF.
ShadowObj = dropshadow(hAxes,'Prop1',Value1,...) creates the dropshadow and sets the specified properties.
The dropshadow object is updated whenever a change is made to one of the properties. The object is deleted upon axes deletion.
Note that the shadow is always put as a 2D image in the background of the plot axes, regardless of 3D rotations.
The current implementation uses the java.awt.Robot to make a snapshot. This will not work with docked figures. A workaround is to use the built-in getframe function, which is activated by setting the hidden property ShadowObj.SnapMethod = 'getframe'. Suggestions for more robust implementations are welcome!
Maarten van der Seijs (2021). dropshadow - Drop Shadow class for plot objects (https://www.mathworks.com/matlabcentral/fileexchange/39024-dropshadow-drop-shadow-class-for-plot-objects), MATLAB Central File Exchange. Retrieved .
Thanks for this submission. I had to update a few things but now it runs in R2018b.
1. assert(strcmp(get(h,'type'),'axes'),'Parent must be an axes handle.') % update assertion
2. obj.listeners.ObjectBeingDestroyed = listener(h, 'ObjectBeingDestroyed', @(~,~) delete(obj)); % update handle.listener to listener
3. rect = hgconvertunits(h.Parent,h.Position,h.Units,'pixels',h.Parent); % undocumented hgconvertunits requires a figure handle so I used h.Parent for the first argument
4. classdef (ConstructOnLoad = true) dropshadow < matlab.mixin.SetGet % for future compatibility
This is a great lightweight helper. I want to get a mesh to throw a shadow and I'm not winning. I see that there is a private function that does a drop shadow for a ShadowObj. Is this the right idea? how do I access it if so?
Yes, I'm using the 2014b version. And thanks, I'll try it on an older version.
Hi Janneke, I guess you are using Matlab version 2014b or newer? The function appears to be incompatible with the updated graphics system (HG2). I haven't been able to fix this; to use it I would suggest to use a Matlab version not newer than 2014a.
I am trying to use the dropshadow effect, using the given example in the script. When I run it, I get the following error:
Error using dropshadow (line 86)
Parent must be an axes handle.
How can I fix this?
Great effect! Just make sure the 'units' of root are pixels before getting the monitor size.
Inspired by: getscreen
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