MATLAB color mixing gcode hack

%gcode hack
clear
clc

codeStart = 1297;
layerDelimiter = 'G92 E0';
fileName = 'vase.gcode';
lineTweak = 0;

cyan = 0;
magenta = 1;
yellow = 2;
ocean = 3;
blue = 4;
violet = 5;
raspberry = 6;
red = 7;
orange = 8;
springGreen = 9;
green = 10;
Turquoise = 11;

extruderOrder = [
             cyan;          ...
             ocean;          ...
             blue;          ...
             violet;          ...
             magenta;          ...
             raspberry;          ...
             red;          ...
             orange;          ...
             yellow;          ...
             springGreen;          ...
             green;          ...
             Turquoise;          ...
           ];

numExtruders = length(extruderOrder);

fileID = fopen(fileName);
data = textscan(fileID,'%s','delimiter','\n');%,'whitespace','');
data = data{1};
fclose(fileID);
numOriginalLines = length(data);
currentExtruder = 1;
layerNumber = 0;
previousLocation = codeStart;

for currentLine = codeStart+3:numOriginalLines

locationOfLayerDelimter = findstr(data{currentLine}, layerDelimiter);

if ~isempty(locationOfLayerDelimter)
    layerNumber = layerNumber + 1;
    blockStart = previousLocation;
    blockStop = currentLine;

    linesPerCurrentLayer = blockStop - blockStart;
    blockData(layerNumber,:) = [blockStart+lineTweak, blockStop+lineTweak, linesPerCurrentLayer];

    previousLocation = currentLine;
end
end

numberOfLayers = layerNumber;
numberOfToolChanges = numberOfLayers*numExtruders;
newDataNumLines = numOriginalLines + numberOfToolChanges;
toolChangeLineNumber = zeros(1,numberOfToolChanges);

for currentLayer = 1:numberOfLayers
    blockData(currentLayer,1) = blockData(currentLayer,1) + (currentLayer-1)*numExtruders;
    blockData(currentLayer,2) = blockData(currentLayer,2) + (currentLayer)*numExtruders;
    blockData(currentLayer,3) = blockData(currentLayer,3) + numExtruders;
end

pointer = 1;
for currentLayer = 1:numberOfLayers
    linesPerCurrentLayer = blockData(currentLayer,3);
    blockStart = blockData(currentLayer,1);
    blockStop = blockData(currentLayer,2);
    toolChangeLineNumber(pointer:pointer+numExtruders) = floor(linspace(blockStart,blockStop,numExtruders+1));
    pointer = pointer+numExtruders;
end

oldDataPointer = 1;
toolChangePointer = 1;
%allBookmarksUsed = false;
for currentLine = 1:newDataNumLines
    if (currentLine == toolChangeLineNumber(toolChangePointer))% && (allBookmarksUsed == false)
        s = sprintf(['T' int2str(extruderOrder(currentExtruder))]);
        newData{currentLine} = s;%cellstr(s);

        currentExtruder = currentExtruder + 1;
        if currentExtruder > numExtruders
            currentExtruder = 1;
        end

        toolChangePointer = toolChangePointer + 1; %now look for the next bookmark
        if toolChangePointer >= numberOfToolChanges
            toolChangePointer = numberOfToolChanges;
            allBookmarksUsed = true;
        end
    else
        newData{currentLine} = data{oldDataPointer};
        oldDataPointer = oldDataPointer + 1; % only increment if an old data point is used
    end

end

fileOUTID = fopen('vaseTest.gcode','w');
for i = 1:newDataNumLines
    fprintf(fileOUTID,[newData{i} '\n']);
end
fclose(fileOUTID);