simple_Xu.tens

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[constants]
  ls:=sqrt(2)   % length of struts
  fs:=-4        % max. compression 
  lc:=2         % max. length of cables
  sc:=1         % stiffness of cables
 
  rad:=0.02

  x1:=-0.063907076477190
  y1:= 0.892724035478908

[planar structure]
  strut s1: n1 n3 
            length ls 
            force [fs,0]
            radius rad
            
  strut s2: n2 n4 
            length ls 
            force [fs,0]
            radius rad
            
  cable c1: n1 n2 
            length [0,lc] 
            stiffness sc 
            rest [0,lc]
            
  cable c2: n2 n3 
            length [0,lc] 
            stiffness sc 
            rest [0,lc]
            
  cable c3: n3 n4
            length [0,lc] 
            stiffness sc 
            rest [0,lc]
            
  cable c4: n1 n4 
            length [0,lc] 
            stiffness sc 
            rest [0,lc]
            
[fixed points]
  n1=(0,0,0)
  n2(y)=0
  
  % n2=(1,0,0)
  % n3=(1,1,0)
  % n4=(1-ls*cos(35*pi/180),ls*sin(35*pi/180),0)

[obstacles]
  obs : box (-0.2,y1,-0.05) (x1,1.2,0.05) red

[collisions]
  check: obs