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[ePiX-users] Fwd: Need help to find error


From: Gunnar Lindholm
Subject: [ePiX-users] Fwd: Need help to find error
Date: Sun, 2 May 2021 15:01:12 +0200

Hello.
Haven't used epix for some time, but I tried to create a two squares inside a half-circle, but it failed.

I use 1.2.18

and I got this error
Error: /undefined in getenv

I've attached the log file
and here is the code

/* -*-ePiX-*- */
#include "epix.h"
using namespace ePiX;
double f(double x)
{
  return sqrt(1-x*x);
}


int main()
{
  picture(P(-1, 0), P(1, 1), "2.5 x 1.25in");

  begin();

  h_axis(4);  
  v_axis(2);  
//  h_axis_labels(xsize(), P(0, -4), b);

  arc(P(0,0), 1, 0, M_PI);
  bold();

  double a,b,s1,s2;
  s2 = 0.8;
  a = f(s2);
  b = s2-a;
  s1 = -b/2 + sqrt(b*b/4+1-b*b);
 
  rect(P(-b,0), P(a, s2));
//  rect(P(-b-s1,0), P(-b, s1));

  label(P(a, f(a)), P(2,4), "$y=\\sqrt{1-x^2}$", tr);

  end();
}



Attachment: x_cpp.log
Description: Binary data


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