www.gusucode.com > Simscape Tutorial Exercises工具箱matlab源码 > Simscape Tutorial Exercises/Simscape_Exercises_R18b/Ex_02d/Contact_Forces/Scripts_Data/Extrusions/Extr_Data_Link2Hole.m
function [xy_data] = Extr_Data_Link2Hole(L, W, r, varargin) %Extr_Data_Link2Hole Produce extrusion data for a link with half a hole at each end. % [xy_data] = Extr_Data_Link2Hole(L, W, r) % This function returns x-y data for a link with half a hole at each end. % You can specify: % Length L % Width W % Hole radius r % % To see a plot showing parameter values, enter the name % of the function with no arguments % >> Extr_Data_Link2Hole % % To see a plot created with your parameter values, % add 'plot' as the final argument % >> Extr_Data_Link2Hole(10,5,2,'plot') % Copyright 2012-2018 The MathWorks, Inc. % Default data to show diagram if (nargin == 0) L = 10; W = 5; r = 2; end % Check if plot should be produced if (isempty(varargin)) showplot = 'n'; else showplot = char(varargin); end top_xsec = [L/2 W/2; -L/2 W/2]; theta = (90:-1:-90)*pi/180; left_semi_hole_xsec = [-L/2+r*cos(theta') r*sin(theta')]; bottom_xsec = [-L/2 -W/2; L/2 -W/2]; theta = (270:-1:90)*pi/180; right_semi_hole_xsec = [L/2+r*cos(theta') r*sin(theta')]; xy_data = [ top_xsec; left_semi_hole_xsec; ... bottom_xsec; right_semi_hole_xsec]; % Plot diagram to show parameters and extrusion if (nargin == 0 || strcmpi(showplot,'plot')) % Figure name figString = ['h1_' mfilename]; % Only create a figure if no figure exists figExist = 0; fig_hExist = evalin('base',['exist(''' figString ''')']); if (fig_hExist) figExist = evalin('base',['ishandle(' figString ') && strcmp(get(' figString ', ''type''), ''figure'')']); end if ~figExist fig_h = figure('Name',figString); assignin('base',figString,fig_h); else fig_h = evalin('base',figString); end figure(fig_h) clf(fig_h) % Plot extrusion patch(xy_data(:,1),xy_data(:,2),[1 1 1]*0.90,'EdgeColor','none'); hold on plot(xy_data(:,1),xy_data(:,2),'-','Marker','o','MarkerSize',4,'LineWidth',2); axis('equal'); axis([-1 1 -1 1]*(L+W)*1.1/2); % Show parameters hold on plot([-L/2 L/2],[0 0],'r-d','MarkerFaceColor','r'); text(-L/4,W/10,'{\color{red}L}'); plot([L/4 L/4],[-W/2 W/2],'g-d','MarkerFaceColor','g'); text(L/3.8,W/4,'{\color{green}W}'); plot([-L/2 -L/2+r*sin(30*pi/180)],[0 r*cos(30*pi/180)],'k-d','MarkerFaceColor','k'); text(-L/2+r*sin(30*pi/180)*1.4,1.4*r*cos(30*pi/180),'r'); title(['[xy\_data] = Extr\_Data\_Link2Hole(L, W, r);']); hold off box on clear xy_data end