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56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
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/*
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* ops.c - Higher-level toolpath operations
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*
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* Written 2010 by Werner Almesberger
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* Copyright 2010 Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include "path.h"
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#include "ops.h"
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static void tool_comp_1(struct path *path, int inside, int dog_bone)
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{
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int left;
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struct path *new;
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left = path_tool_is_left(path);
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if (inside)
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new = path_offset(path, !left, path->notch);
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else
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new = path_offset(path, left, path->notch || dog_bone);
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path_replace(path, new);
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}
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void tool_comp_paths(struct path *paths, int dog_bone)
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{
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struct path *leftmost, *path;
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/*
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* We don't have an algorithm (yet) that can detect which paths are
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* inside other paths. Therefore, we fake it by looking for the path
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* that contains lowest x coordinate. This ought to be the outer
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* boundary of the piece.
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*
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* Note that this heuristic falls apart when a job consists of
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* multiple pieces. In this case, the #%outside hint can be used to
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* explicitly tell cameo to treat the path as an outside edge.
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*/
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leftmost = path_find_leftmost(paths);
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for (path = paths; path; path = path->next)
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if (path != leftmost && !path->outside)
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tool_comp_1(path, 1, dog_bone);
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for (path = paths; path; path = path->next)
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if (path != leftmost && path->outside)
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tool_comp_1(path, 0, dog_bone);
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tool_comp_1(leftmost, 0, dog_bone);
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}
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