2.1.14. geom_translate


Purpose

translate microstructure indices (shift or substitute) and/or geometry origin.

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Usage

> geom_translate options [geomfile(s)]

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Options

-o / --origin
offset from old to new origin of grid
-m / --microstructure
offset from old to new microstructure indices
-s / --substitute
substitutions of microstructure indices from,to,from,to,...


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Example

> geom_translate --origin 0.5 0.5 0 --substitute 1,-7 --microstructure 8 < micro.geom > micro_translated.geom

This example demonstrates the combination of grid origin shifting, index substitution, and the overall shift of microstructure indices for a geometry of dimension 1 x 1 x 0.5 containing eight (periodic) grains discretized by 16 x 16 x 8 voxels.

  • The original geometry (Figure 1 (a)) is taken from micro.geom. Resulting geometry (Figure 1 (b)) is output to micro_translated.geom.
  • Option --origin 0.5 0.5 0.0 moves the origin by this relative amount, i.e. to the x-y center of the patch.
  • Next, --substitute 1,-7 replaces all instances of microstructure index 1 with -7.
  • Lastly, --microstructure 8 adds +8 to all microstructure indices in the geometry file.

Note that any substitution always precedes the index shifting.

original
(a) Eight (periodic) grains discretized with 16 by 16 by 8 voxels
after translation
(b) Grain patch after translating the origin by 0.5, 0.5, 0.0, substituting (old) microstructure index 1 with -7, and finally shifting all indices by +8. Original microstructure index 1 (cyan) remains constant, since 1 = -7 + 8.
Figure 1: Original grain patch and resulting patch changed in one step

Topic revision: r12 - 06 Jul 2016, MartinDiehl


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