root/OptimizingMATLABCode/Truss/plotTruss.m @ 11
| 10 | anderm8 | function plotTruss(Yr,bars,L,N,H)
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% plotTruss(Yr,bars,L,N,H)
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% Copyright 2015 The MathWorks, Inc.
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% Make sure five inputs are passed in
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narginchk(5,5)
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% Displacements of nodes at each time step
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dispX = Yr(:,1:2:end); % odd columns are x displacements
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dispY = Yr(:,2:2:end); % even columns are y displacements
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% Initial node locations
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topCord = [(0:N)*L/N; zeros(1,N+1)]; % [x; y] coordinates of top cord
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botCord = [(0:N-1)*L/N; ones(1,N)*(-H)]; % [x; y] coordinates of bottom cord
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xyBase = [topCord,botCord]; % The truss is defined from bottom left corner counter clockwise
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% Base locations
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xyStartBase = xyBase(:,bars(:,5));
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xyFinishBase = xyBase(:,bars(:,6));
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% Figure out how many time steps to show
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tsteps = size(dispX,1);
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skpr = max(1,floor(tsteps/300));
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% Loop over time and draw the deformed truss at each time step
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for ii=1:skpr:tsteps
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% Where are the two ends of each truss element?
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xyStart = xyStartBase + [dispX(ii,bars(:,5)); dispY(ii,bars(:,5))];
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xyFinish = xyFinishBase + [dispX(ii,bars(:,6)); dispY(ii,bars(:,6))];
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% Plotting
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if ii == 1
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% First iteration, build the figure and line
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figure
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h = plot([xyStart(1,:); xyFinish(1,:)],[xyStart(2,:); xyFinish(2,:)],'linewidth',1.5);
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% Adjust the axes and title
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axis([0, 1.2*L, -2*H, H])
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set(gca,'XTick',[])
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set(gca,'YTick',[])
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title('Truss')
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elseif ishandle(h(1))
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% Otherwise update its Data
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for jj = 1:numel(h)
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% Update each line's data
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set(h(jj),'XData',[xyStart(1,jj) xyFinish(1,jj)]);
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set(h(jj),'YData',[xyStart(2,jj) xyFinish(2,jj)]);
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end
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else
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% Figure closed interactively
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break
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end
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% Force update and slow it down for animation
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pause(0.025)
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end
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end
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