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From: Marcin Polkowski on 10 Oct 2009 14:12
Hi,

How can I create my own simulink block with 3-D input and output (RGB image in and out)? I've tried with "MATLAB fcn" and "Level-2 S-function" but both this methods has 2-D limit...

Thanks and regards,
Marcin
From: Phil Goddard on 10 Oct 2009 21:24
As of R2007a level-2 S-functions have allowed multidimensional inputs and outputs.
The trick is to define
block.AllowSignalsWithMoreThan2D = true;
in the setup function.

Below is an example:

%%%%%%%%Cut Here%%%%%%%%%%
function multiDimSfun(block)
setup(block);
%endfunction

function setup(block)

% Register number of ports
block.NumInputPorts = 1;
block.NumOutputPorts = 1;

% Allow multidimensional signals
block.AllowSignalsWithMoreThan2D = true;

% Setup port properties to be inherited or dynamic
block.SetPreCompInpPortInfoToDynamic;
block.SetPreCompOutPortInfoToDynamic;

% Override input port properties
block.InputPort(1).DatatypeID = 0; % double
block.InputPort(1).Complexity = 'Real';
block.InputPort(1).DirectFeedthrough = true;

% Override output port properties
block.OutputPort(1).DatatypeID = 0; % double
block.OutputPort(1).Complexity = 'Real';

% Register parameters
block.NumDialogPrms = 0;

% Register sample times
block.SampleTimes = [-1 0];

block.SetAccelRunOnTLC(false);
block.RegBlockMethod('SetInputPortDimensions', @SetInpPortDims);
block.RegBlockMethod('SetOutputPortDimensions', @SetOutPortDims);
block.RegBlockMethod('Outputs', @Outputs);

function SetInpPortDims(block, idx, di)
block.InputPort(idx).Dimensions = di;
%endfunction

function SetOutPortDims(block, idx, di)
block.OutputPort(idx).Dimensions = di;
%endfunction

function Outputs(block)
block.OutputPort(1).Data = 2*block.InputPort(1).Data;
%endfunction

%%%%%%% Cut Here %%%%%%%%%%%

Phil.
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