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fix Get Pocket Surfaces description

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Jeff Doyle (nfz) 2016-06-24 23:42:42 -03:00
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Blendercam-Tools.md

@ -57,10 +57,14 @@ Curve remove doubles - warning, removes beziers! Does not create a new curve but
This operator will convert the curve to a mesh, perform remove doubles on the mesh, and then convert it back to a curve. This can be used to fix curves that are imported into Blender from other applications i.e. stl, dxf, that may have overlapping control points in the curve which can be a problem when calculating an operation.
##Get pocket surfaces
## Get pocket surfaces
This operator will detect pockets in a mesh and extract them as curves. The curves can then be used for pocket operations.
The way the detection works is each face in the mesh is checked to see if it is horizontal and facing up by checking the face normal. There is an operator option called **horizontal threshold** that is used to determine if the face is horizontal. A value closer to 1.0 means that the face normal must be almost vertical ie the face must be almost perfectly flat. A value closer to 0.0 means that the face does not have to be perfectly horizontal ie part of a curved surface.
Operator Options:
* **horizontal threshold** - if 1.0 then perfectly flat survace, if < 1.0 then allow surfaces not perfectly flat.
* **z limit** - flat surfaces that are below the z limit are considered a pocket.
Operator option **z limit** controls which horizontal surfaces are considered a pocket. If the horizontal surface z location is below the z limit then the surface is considered a pocket.
The way the detection works is each face in the mesh is checked to see if it is horizontal and facing up by checking the face normal. There is an operator option called **horizontal threshold** that is used to determine if the face is horizontal. A value closer to 1.0 means that the face normal must be almost vertical ie the face must be almost perfectly flat. A value closer to 0.0 means that the face does not have to be perfectly horizontal ie part of a curved surface.
Operator option **z limit** controls which horizontal surfaces are considered a pocket. If the horizontal surface z location is below the z limit then the surface is considered a pocket. Setting z limit to 0.0 (default setting) should work for most situations if mesh top is at z=0.0.