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Add rewind function.

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This commit is contained in:
Hermann Kraus 2012-08-10 02:14:05 +02:00
parent 3db18cfa50
commit 2252e128bd
1 changed files with 12 additions and 6 deletions
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18
include/mapnik/vertex_cache.hpp
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@ -88,6 +88,7 @@ public:
bool forward(double length);
bool backward(double length);
bool move(double length); //Move works in both directions
void rewind();
state save_state() const;
void restore_state(state s);
@ -198,12 +199,7 @@ bool vertex_cache::next_subpath()
current_subpath_++;
}
if (current_subpath_ == subpaths_.end()) return false;
current_segment_ = current_subpath_->vector.begin();
//All subpaths contain at least one segment
current_position_ = current_segment_->pos;
position_in_segment_ = 0;
segment_starting_point_ = current_position_;
angle_valid_ = false;
rewind();
return true;
}
@ -276,6 +272,16 @@ bool vertex_cache::move(double length)
return true;
}
void vertex_cache::rewind()
{
current_segment_ = current_subpath_->vector.begin();
//All subpaths contain at least one segment
current_position_ = current_segment_->pos;
position_in_segment_ = 0;
segment_starting_point_ = current_position_;
angle_valid_ = false;
}
vertex_cache::state vertex_cache::save_state() const
{