hello,

i want to model cable with 2 parts : cylindrical and part of torus.

for cylindrical, i have no problem. code i use is :

#declare p1 = 8;    // number of helixes 
#declare p2 = 0.25; // number of turns per unit length 
#declare p3 = 1.75; // minor radius
#declare p4 = 1.50; // major radius
#declare p5 = 1.00; // shape parameter
#declare p6 = 1;    // cross section type -> circle
#declare p7 = 0;    // cross section rotation angle

#declare containerSize = 3.20;
#declare maxGradiantValue = 10;

#declare cableFunction = function { f_helix1(x, y, z, p1, p2, p3, p4, 
p5, p6, p7) }

#declare cableCyl = isosurface {
  function { cableFunction(x,y,z) }
  contained_by { 
    box { <+containerSize, 0.00, +containerSize> <-containerSize, 
-cableLen, -containerSize>   }
    }
  max_gradient maxGradiantValue
  }


for "torus part", i do this code :

#declare cableTorus = isosurface {
  function { cableFunction(f_r(x,y,z)-MajorRadius, y, f_th(x,y,z)) }
  contained_by { 
    sphere { 0,*MajorRadius1.2 }
    }
  max_gradient maxGradiantValue
  rotate 90*x 
  }
with MajorRadius = 80.00


... but all the thing a get is a plain torus !!!

anyone can help me ?
thanks

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