I have macros for rounded_box, rounded_cylinder, and 
rounded_cylinder_section, for both CSG and isosurface.

I need help with the rounded_cylinder_section, isosurface.
I only need from >0 to 180 degrees sections
(I know this has no rounding yet)
How do I make my second cut at an angle?  Hints?

isosurface{
  function {
   max(
    sqrt(pow(x,2)+pow(z,2))-Radius+Block_gap,
    abs(y-Height/2)-Height/2+Block_gap,  // cylinder height
    abs(z-Radius/2)-Radius/2+Block_gap,  // my reference edge
    abs(x-Radius/2)-Radius/2+Block_gap   // wrong except for 90 degrees
    )
   +Block_surface_iso_noise(x,y,z)
  }
  contained_by { box { <-Radius,0,-Radius>, <Radius,Height,Radius> } }
}


The bottom right of the second image wants to be 120 degrees each.

Stephen S

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Attachments:
Download 'stone_blocks_csg.png' (733 KB) Download 'stone_blocks_isosurface.png' (776 KB)

Preview of image 'stone_blocks_csg.png'

Preview of image 'stone_blocks_isosurface.png'