Geo_Setup_Explicit.m

function[AnchorXu,AnchorYu,AnchLineConnect,...
    LineConnect,TurbLineConnect,TurbAnchConnect,NAnchs,NLines,...
    AnchTurbConnect,LineFail,AnchorFail,TurbFail,AnchAnchConnect,...
    LineAnchConnect,LineLineConnect,LAC,ALC] =...
    Geo_Setup_Explicit(TurbX,TurbY,TADistance,NTurbs)
Angles = [180 300 420]; %Line angles
rotorDiameter = 126;
minTurbDist = rotorDiameter*10;
minAnchDist = TADistance/2;
eps = 1e-9; %Machine epsilon to account for rounding errors

%Preallocation of anchor and turbine coordinates
AnchorX = zeros((NTurbs),3);
AnchorY = zeros((NTurbs),3);

%Randomly create TurbX and TurbY positions, which determine turbine
%coordinates on the given site size. If statement is included to constrain
%layout so avoid conflicts as specified.
for j = 1:NTurbs
    % Anchor positions are generated in identical configurations for each
    % turbine, based on the turbine placement
    AnchorX(j,:) = TurbX(j) + TADistance*cosd(Angles);
    AnchorY(j,:) = TurbY(j) + TADistance*sind(Angles);
    % After the first iteration, turbine placements need to be compared to
    % existing turbine locations to prevent turbines or anchors from being
    % too close to each other (10 rotor diameters for turbines, 500 meters
    % for anchors by default)
    if j > 1
        [TurbDists,AnchDists] = ComponentDistance(TurbX(j),TurbX(1:j-1),...
            TurbY(j),TurbY(1:j-1),AnchorX(j,:),AnchorX(1:j-1,:),...
            AnchorY(j,:),AnchorY(1:j-1,:));
        % If turbines are too close, move the current turbine to a random
        % other location until all conflicts resolve
        if any(TurbDists < minTurbDist & TurbDists > eps)
            warning(['Turbine #',num2str(j),' is less than seven rotor',...
                ' diameters from other turbines, making wake effects',...
                ' non-negligible. Increasing turbine distances is suggested.'])
        end
        if any(AnchDists(:) < minAnchDist & AnchDists(:) > eps)
            warning(['Turbine #',num2str(j),' has anchors less than ',...
                num2str(minAnchDist),'m from other anchors.',...
                'Relocating the turbine to increase anchor distances is suggested.'])
        end
    end
end

% Rearrange anchors into a vector form, and if anchors are in identical
% coordinates, delete redundant anchors (this is only relevant for
% multiline configurations)
AnchorYr = reshape(AnchorY',[],1);
AnchorXr = reshape(AnchorX',[],1);
XY = [AnchorXr,AnchorYr];
XY = round(XY*1000000)/1000000;
[~,ind] = unique(XY,'rows','first');
XYu = XY(sort(ind),:);

AnchorXu = XYu(:,1);
AnchorYu = XYu(:,2);
NAnchs = length(AnchorXu); %Total number of anchors
%% Now map the connections between the floaters and the anchors
% This gives us connectivity matrices that can be used as lookup tables
% later on
AList = 1:length(AnchorXu); %List of anchor numbers
NLines = NTurbs*3; %Total number of lines
LineConnect = zeros(NLines,2); %Turbine/line connectivity
TurbLineConnect = zeros(NTurbs,3); %Line/turbine connectivity
TurbAnchConnect = zeros(3,NTurbs); %Turbine anchor connectivity

%% Turbine anchor and line connectivity
for i = 1:NTurbs    
    Ax = round((TurbX(i) + TADistance*cosd(Angles))*1000000)/1000000;
    Ay = round((TurbY(i) + TADistance*sind(Angles))*1000000)/1000000;
    
    TurbAnchConnect(1,i) = AList(AnchorXu == Ax(1) & AnchorYu == Ay(1));
    TurbAnchConnect(2,i) = AList(AnchorXu == Ax(2) & AnchorYu == Ay(2));
    TurbAnchConnect(3,i) = AList(AnchorXu == Ax(3) & AnchorYu == Ay(3));
    
    LineConnect(3*i-2:3*i,1) = i;
    LineConnect(3*i-2,2) = TurbAnchConnect(1,i);
    LineConnect(3*i-1,2) = TurbAnchConnect(2,i);
    LineConnect(3*i,2) = TurbAnchConnect(3,i);
    
    TurbLineConnect(i,1) = 3*i-2;
    TurbLineConnect(i,2) = 3*i-1;
    TurbLineConnect(i,3) = 3*i;
end

%% Anchor connectivity
AnchTurbConnect = zeros(3,NAnchs);
for i = 1:NAnchs
    [a,b] = find(TurbAnchConnect == i);
    ind = [];
    if i == 12
        6;
    end
    for j = 1:length(a)
        if a(j) == 1
            ind(j) = 2;
        elseif a(j) == 2
            ind(j) = 3;
        elseif a(j) == 3
            ind(j) = 1;
        end        
    end
    AnchTurbConnect(ind,i) = b;
end

%% Anchor line connections
AnchLineConnect = zeros(NAnchs,9); %All lines associated with given anchor
for i = 1:NAnchs
    [r,c] = find(TurbAnchConnect == i); %Find turbines directly connected to this anchor
    for j = 1:length(r)
        if r(j) == 1 %Upwind line
            AnchLineConnect(i,1:3) = TurbLineConnect(c(j),:);
        elseif r(j) == 2 %bottom right line
            AnchLineConnect(i,4:6) = TurbLineConnect(c(j),:);
        elseif r(j) == 3 %top right line
            AnchLineConnect(i,7:9) = TurbLineConnect(c(j),:);
        end
    end
end

%% Develop anchor to anchor connections (Anchor associated with all other anchors)
AnchAnchConnect = zeros(NAnchs,9); %All anchors associated with given anchor
for i = 1:NAnchs
    [r,c] = find(TurbAnchConnect == i); %Find turbines directly connected to this anchor
    for j = 1:length(r)
        if r(j) == 1 %Upwind line
            AnchAnchConnect(i,1:3) = TurbAnchConnect(:,c(j));
        elseif r(j) == 2 %Bottom right line
            AnchAnchConnect(i,4:6) = TurbAnchConnect(:,c(j));
        elseif r(j) == 3 %Top right line
            AnchAnchConnect(i,7:9) = TurbAnchConnect(:,c(j));
        end
    end
end

%% Develop line and anchor connections
LineAnchConnect = zeros(NLines,3); %All anchors associated with a given line
LineLineConnect = zeros(NLines,3); %All lines associated with a given line
for i = 1:NLines
    TurbNum = LineConnect(i,1);
    Anums = TurbAnchConnect(:,TurbNum);
    LineAnchConnect(i,:) = Anums;
    
    LineNums = TurbLineConnect(TurbNum,:);
    LineLineConnect(i,:) = LineNums;
end

LineFail = zeros(NTurbs*3,6); %Preallocated line failures
AnchorFail = zeros(NAnchs,1); %Preallocated anchor failures
TurbFail = zeros(NTurbs,1); %Preallocated turbine failures

%% Make a list showing which line is directly connected to which anchor
LAC = zeros(NLines,1);
for i = 1:NTurbs
    LineNums = TurbLineConnect(i,:);
    AnchNums = TurbAnchConnect(:,i);
    LAC(LineNums) = AnchNums;
end

%% Make a list that goes from anchor to lines
ALC = zeros(NAnchs,3);
LineList = 1:NLines;
for i = 1:NAnchs
    ac = LineList(LAC==i);
    ALC(i,1:length(ac)) = ac;
end