659
edits
Geometry package: Difference between revisions
Jump to navigation
Jump to search
m
small fixes
Carandraug (talk | contribs) m (small fixes) |
|||
| Line 27: | Line 27: | ||
Now we have our SVG as a polygon compatible with the Geometry package format. You can plot the polygon using the function {{Codeline|drawPolygon}}. | Now we have our SVG as a polygon compatible with the Geometry package format. You can plot the polygon using the function {{Codeline|drawPolygon}}. | ||
{{Code|Plotting a polygon compatible with geometry package|<pre> | {{Code|Plotting a polygon compatible with geometry package|<pre> | ||
drawPolygon (P, | drawPolygon (P, "-o"); | ||
</pre>}} | </pre>}} | ||
As you can see the polygon has lots of points. We need to simplify the polygon in order to obtain a mesh of reasonable size. Otherwise gmsh will have problems meshing and the result could be huge (or a segmentation fault :( ). | As you can see the polygon has lots of points. We need to simplify the polygon in order to obtain a mesh of reasonable size. Otherwise gmsh will have problems meshing and the result could be huge (or a segmentation fault :( ). The package geometry comes with a simplification function but as of version 1.4.0, this function is very naïve and wont fix this problem. If you know how to simplify polygons you can contribute! | ||
We are going to reduce the amount of points of the polygon in a drastic and destructive way (i.e. the shape may be considerably damaged). The codes to do so follows, in the future a better procedure will be published here. | We are going to reduce the amount of points of the polygon in a drastic and destructive way (i.e. the shape may be considerably damaged). The codes to do so follows, in the future a better procedure will be published here. | ||
{{Code|Symplification of a polygon compatible with geometry package|<pre> | {{Code|Symplification of a polygon compatible with geometry package|<pre> | ||
| Line 59: | Line 59: | ||
{{Code|Plotting mesh with fpl package|<pre> | {{Code|Plotting mesh with fpl package|<pre> | ||
pkg load fpl | pkg load fpl | ||
graphics_toolkit('fltk') | graphics_toolkit ('fltk') | ||
pdemesh (T.p, T.e, T.t); | pdemesh (T.p, T.e, T.t); | ||
view (2) | view (2) | ||