i've made a mistake - modeled a complex (consisting of a number of meshes) object without a mirror modifier.

and now i came to unwrapping and decided to use mirror modifier. but stuck. i don't know how to split this object into halves, because tools i know (knife, edge loop, bisect) won't do it.

i was adviced to use boolean modifier first with a cube. it seems to work, but may be there is some simplier way?

EDIT: boolean worked only on somehow simple objects, but failed on something more complex.

here is the image: enter image description here it is perfectly symmetrical. it not always has edges in the middle, but i think it's not a problem (faces there are flat)?

here is the blend: http://www.pasteall.org/blend/43072

  • $\begingroup$ Does the geometry have a straight edges at the center,where the cut would be made? $\endgroup$ – Omar Emara Aug 11 '16 at 7:41
  • $\begingroup$ It largely depends on the object. Can you add an image to your question? $\endgroup$ – Timaroberts Aug 11 '16 at 7:42
  • $\begingroup$ and is your model totally symmetrical ? $\endgroup$ – lemon Aug 11 '16 at 7:42
  • $\begingroup$ Could you split the object into multiple, boolean that and recombine them? $\endgroup$ – Bradman175 Aug 11 '16 at 9:45
  • $\begingroup$ The knife tool would work for this. Follow my answer, but also press Z before making the cut. $\endgroup$ – David Aug 11 '16 at 15:25

'Knife project' works well here :

  • Add a plane
  • Place one of its edges along the middle (at the exact center)
  • You may work in a ortho view and along the axis (here top ortho)
  • Stretch it so that it covers your mesh
  • Select your mesh (keeping the plane selected) and enter edit mode
  • Hit 'knife project' and make sure the option is 'cut through'
  • Select the half to remove and add the mirror modifier

enter image description here

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  • $\begingroup$ wow! cool! thank you! i have never used this tool and thought it something identical to simple knife, lol $\endgroup$ – curly brace Aug 11 '16 at 10:14

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