71 lines
2.6 KiB
Plaintext
Executable File
71 lines
2.6 KiB
Plaintext
Executable File
.. _offsetsurf :
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 _place_holder;
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> **_OFFSETSURF_**
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>
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>> Offsets triangulated surfaces in the direction of the surface outward
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normal, i.e., normal surface motion. For each node a 'synthetic' unit outward
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normal **N** is computed based on the weighted average angle of the normals of
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the triangles shared by that node. old_cmo is the surface to be used in
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generating the offset surface. new_cmo is the name of the new surface.
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> > To add the nodes in the new surface to the main mesh object use the
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**copypts** command. To add the new surface to the main mesh object use a
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**surface** command with new_cmo as the sheet name (e.g.
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**surface**/s2d/bndy_typedist is given in user coordinates (i.e. whatever
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units the old_cmo mesh object was defined in.) The new node coordinates,
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R_new, are computed using the formula:
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>>
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>>> R_new = R_old + dist * N_node
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>>
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>> Various keywords control the behavior of the command:
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>>
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>>> The following keywords can appear in the 5th, 6th, 7th or 8th argument
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position.**
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keepatt****, keep_angle** -  _place_holder;Compute node angle weighted
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normals and keep the vector components in three scalar attributes x_n_norm,
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y_n_norm, z_n_norm
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**keep_area** - Compute node area weighted normals and keep the vector components in three scalar attributes, x_n_norm, y_n_norm, z_n_norm**
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xzero** _place_holder; - Compute the full offset direction vector but set
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x component to zero
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**yzero** _place_holder; - Compute the full offset direction vector but set x component to zero
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**zzero** _place_holder; - Compute the full offset direction vector but set x component to zero
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The following keywords can appear in the 5th argument position.
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**xy, xz, yx yz zx zy** - these keywords constrain the offset to be parallel to the specified plane. These arguments can be used with a line type mesh object to constrain the offset to a particular plane.
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>
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>> FORMAT:
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 _place_holder; **offsetsurf**/new_cmo/old_cmo/dist/keyword
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 _place_holder;
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 _place_holder; EXAMPLES: **offsetsurf/**cmo_out/cmo_in/d
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 _place_holder; _place_holder; _place_holder; _place_holder;&n
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bsp_place_holder; _place_holder; _place_holder; _place_holder;&nbs
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p_place_holder; offset a triangulated surface a distance d using angle
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weighted normals
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offsetsurf/cmo_out / cmo_in / d / keep_area  _place_holder; - offset using
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area weithted normals **offsetsurf/**cmo_out/cmo_in/d/[xy,xz,yx,yz,zx,zy]
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offset a line cmo a distance d in a direction parallel to the specified plane.
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**offsetsurf/**cmo_out/cmo_in/d/x y z offset a line cmo a distance d in the
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direction specified by the vector (x,y,z)
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