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Optimization in GLCanvas3D::reload_scene():

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Use sorting and binary search instead of linear search.
O(n log n) versus O(n^2)
This commit is contained in:
bubnikv 2019-12-10 11:12:17 +01:00
parent 24bbad634a
commit b12bc5c4d5
2 changed files with 11 additions and 15 deletions
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24
src/slic3r/GUI/GLCanvas3D.cpp
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@ -2063,9 +2063,11 @@ void GLCanvas3D::reload_scene(bool refresh_immediately, bool force_full_scene_re
struct GLVolumeState {
GLVolumeState() :
volume_idx(-1) {}
volume_idx(size_t(-1)) {}
GLVolumeState(const GLVolume* volume, unsigned int volume_idx) :
composite_id(volume->composite_id), volume_idx(volume_idx) {}
GLVolumeState(const GLVolume::CompositeID &composite_id) :
composite_id(composite_id), volume_idx(size_t(-1)) {}
GLVolume::CompositeID composite_id;
// Volume index in the old GLVolume vector.
@ -2191,22 +2193,13 @@ void GLCanvas3D::reload_scene(bool refresh_immediately, bool force_full_scene_re
}
}
sort_remove_duplicates(instance_ids_selected);
auto deleted_volumes_lower = [](const GLVolumeState &v1, const GLVolumeState &v2) { return v1.composite_id < v2.composite_id; };
std::sort(deleted_volumes.begin(), deleted_volumes.end(), deleted_volumes_lower);
if (m_reload_delayed)
return;
bool update_object_list = false;
auto find_old_volume_id = [&deleted_volumes](const GLVolume::CompositeID& id) -> unsigned int {
for (unsigned int i = 0; i < (unsigned int)deleted_volumes.size(); ++i)
{
const GLVolumeState& v = deleted_volumes[i];
if (v.composite_id == id)
return v.volume_idx;
}
return (unsigned int)-1;
};
if (m_volumes.volumes != glvolumes_new)
update_object_list = true;
m_volumes.volumes = std::move(glvolumes_new);
@ -2221,9 +2214,10 @@ void GLCanvas3D::reload_scene(bool refresh_immediately, bool force_full_scene_re
assert(it != model_volume_state.end() && it->geometry_id == key.geometry_id);
if (it->new_geometry()) {
// New volume.
unsigned int old_id = find_old_volume_id(it->composite_id);
if (old_id != (unsigned int)-1)
map_glvolume_old_to_new[old_id] = m_volumes.volumes.size();
auto it_old_volume = std::lower_bound(deleted_volumes.begin(), deleted_volumes.end(), GLVolumeState(it->composite_id), deleted_volumes_lower);
if (it_old_volume != deleted_volumes.end() && it_old_volume->composite_id == it->composite_id)
// If a volume changed its ObjectID, but it reuses a GLVolume's CompositeID, maintain its selection.
map_glvolume_old_to_new[it_old_volume->volume_idx] = m_volumes.volumes.size();
m_volumes.load_object_volume(&model_object, obj_idx, volume_idx, instance_idx, m_color_by, m_initialized);
m_volumes.volumes.back()->geometry_id = key.geometry_id;
update_object_list = true;