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I want to add an edge from A to B and i want the line to be perpendicular to the target edge. so it should make 90 deg angle like in the image. How to do this ? do i need addons ? Does anyone know the good one ?

Thanks.

enter image description here

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  • $\begingroup$ its simple if your edge is aligned with one of the axes otherwise you could have more trouble and may need an addon. I will have to think about this $\endgroup$ – HenrikD Dec 30 '18 at 7:58
  • $\begingroup$ blendermarket.com/products/snap-utilities this is a good addon, but it seems that it's not working in 2.8. $\endgroup$ – andio Dec 30 '18 at 13:29
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It can be frustrating in other ways, but this just happens to be what the Blender snap system does without add-ons.

  • Set snap to 'Vertex' and 'Active'
  • CtrlAltSpace Create a Custom Orientation from side B. (Check 'Use after creation')
  • K Cut an edge from side A to side B
  • With Snap on, G Y Ymove point B up and down its edge

it will snap to the point on side B from which a perpendicular is dropped to point A.

What if the new edge isn't in the right place?

  • Cut another edge, and G G slide it up and down the face, making the edge parallel to the correctly oriented one by hitting E, and F if necessary.
| improve this answer | |
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It can be frustrating in other ways, but this just happens to be what the Blender snap system does without add-ons.

  • Set snap to 'Vertex' and 'Active'
  • CtrlAltSpace Create a Custom Orientation from side B. (Check 'Use after creation')
  • K Cut an edge from side A to side B
  • With Snap on, G Y Ymove point B up and down its edge

When you hover over point A, it will snap to the point on side B from which a perpendicular is dropped to it.

What if the new edge isn't in the right place?

  • Cut another edge, and G G slide it up and down the face, making the edge parallel to the correctly oriented one by hitting E, and F if necessary.
| improve this answer | |
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