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Merged improvements of supports from stable to master.

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This commit is contained in:
bubnikv 2018-12-12 10:12:35 +01:00
parent c6bdf45323
commit 91102e2c9e
1 changed files with 207 additions and 11 deletions
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218
src/libslic3r/SupportMaterial.cpp
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@ -458,6 +458,8 @@ Polygons collect_slices_outer(const Layer &layer)
class SupportGridPattern
{
public:
// Achtung! The support_polygons need to be trimmed by trimming_polygons, otherwise
// the selection by island_samples (see the island_samples() method) will not work!
SupportGridPattern(
// Support islands, to be stretched into a grid. Already trimmed with min(lower_layer_offset, m_gap_xy)
const Polygons &support_polygons,
@ -485,6 +487,18 @@ public:
bbox.align_to_grid(grid_resolution);
m_grid.set_bbox(bbox);
m_grid.create(*m_support_polygons, grid_resolution);
#if 0
if (m_grid.has_intersecting_edges()) {
// EdgeGrid fails to produce valid signed distance function for self-intersecting polygons.
m_support_polygons_rotated = simplify_polygons(*m_support_polygons);
m_support_polygons = &m_support_polygons_rotated;
m_grid.set_bbox(bbox);
m_grid.create(*m_support_polygons, grid_resolution);
// assert(! m_grid.has_intersecting_edges());
printf("SupportGridPattern: fixing polygons with intersection %s\n",
m_grid.has_intersecting_edges() ? "FAILED" : "SUCCEEDED");
}
#endif
m_grid.calculate_sdf();
// Sample a single point per input support polygon, keep it as a reference to maintain corresponding
// polygons if ever these polygons get split into parts by the trimming polygons.
@ -499,9 +513,12 @@ public:
{
// Generate islands, so each island may be tested for overlap with m_island_samples.
assert(std::abs(2 * offset_in_grid) < m_grid.resolution());
ExPolygons islands = diff_ex(
m_grid.contours_simplified(offset_in_grid, fill_holes),
*m_trimming_polygons, false);
#ifdef SLIC3R_DEBUG
Polygons support_polygons_simplified = m_grid.contours_simplified(offset_in_grid, fill_holes);
ExPolygons islands = diff_ex(support_polygons_simplified, *m_trimming_polygons, false);
#else
ExPolygons islands = diff_ex(m_grid.contours_simplified(offset_in_grid, fill_holes), *m_trimming_polygons, false);
#endif
// Extract polygons, which contain some of the m_island_samples.
Polygons out;
@ -551,7 +568,10 @@ public:
bbox.merge(get_extents(islands));
if (!out.empty())
bbox.merge(get_extents(out));
if (!support_polygons_simplified.empty())
bbox.merge(get_extents(support_polygons_simplified));
SVG svg(debug_out_path("extract_support_from_grid_trimmed-%d.svg", iRun).c_str(), bbox);
svg.draw(union_ex(support_polygons_simplified), "gray", 0.25f);
svg.draw(islands, "red", 0.5f);
svg.draw(union_ex(out), "green", 0.5f);
svg.draw(union_ex(*m_support_polygons), "blue", 0.5f);
@ -568,7 +588,121 @@ public:
return out;
}
#ifdef SLIC3R_DEBUG
void serialize(const std::string &path)
{
FILE *file = ::fopen(path.c_str(), "wb");
::fwrite(&m_support_spacing, 8, 1, file);
::fwrite(&m_support_angle, 8, 1, file);
uint32_t n_polygons = m_support_polygons->size();
::fwrite(&n_polygons, 4, 1, file);
for (uint32_t i = 0; i < n_polygons; ++ i) {
const Polygon &poly = (*m_support_polygons)[i];
uint32_t n_points = poly.size();
::fwrite(&n_points, 4, 1, file);
for (uint32_t j = 0; j < n_points; ++ j) {
const Point &pt = poly.points[j];
::fwrite(&pt.x, sizeof(coord_t), 1, file);
::fwrite(&pt.y, sizeof(coord_t), 1, file);
}
}
n_polygons = m_trimming_polygons->size();
::fwrite(&n_polygons, 4, 1, file);
for (uint32_t i = 0; i < n_polygons; ++ i) {
const Polygon &poly = (*m_trimming_polygons)[i];
uint32_t n_points = poly.size();
::fwrite(&n_points, 4, 1, file);
for (uint32_t j = 0; j < n_points; ++ j) {
const Point &pt = poly.points[j];
::fwrite(&pt.x, sizeof(coord_t), 1, file);
::fwrite(&pt.y, sizeof(coord_t), 1, file);
}
}
::fclose(file);
}
static SupportGridPattern deserialize(const std::string &path, int which = -1)
{
SupportGridPattern out;
out.deserialize_(path, which);
return out;
}
// Deserialization constructor
bool deserialize_(const std::string &path, int which = -1)
{
FILE *file = ::fopen(path.c_str(), "rb");
if (file == nullptr)
return false;
m_support_polygons = &m_support_polygons_deserialized;
m_trimming_polygons = &m_trimming_polygons_deserialized;
::fread(&m_support_spacing, 8, 1, file);
::fread(&m_support_angle, 8, 1, file);
//FIXME
//m_support_spacing *= 0.01 / 2;
uint32_t n_polygons;
::fread(&n_polygons, 4, 1, file);
m_support_polygons_deserialized.reserve(n_polygons);
int32_t scale = 1;
for (uint32_t i = 0; i < n_polygons; ++ i) {
Polygon poly;
uint32_t n_points;
::fread(&n_points, 4, 1, file);
poly.points.reserve(n_points);
for (uint32_t j = 0; j < n_points; ++ j) {
coord_t x, y;
::fread(&x, sizeof(coord_t), 1, file);
::fread(&y, sizeof(coord_t), 1, file);
poly.points.emplace_back(Point(x * scale, y * scale));
}
if (which == -1 || which == i)
m_support_polygons_deserialized.emplace_back(std::move(poly));
printf("Polygon %d, area: %lf\n", i, area(poly.points));
}
::fread(&n_polygons, 4, 1, file);
m_trimming_polygons_deserialized.reserve(n_polygons);
for (uint32_t i = 0; i < n_polygons; ++ i) {
Polygon poly;
uint32_t n_points;
::fread(&n_points, 4, 1, file);
poly.points.reserve(n_points);
for (uint32_t j = 0; j < n_points; ++ j) {
coord_t x, y;
::fread(&x, sizeof(coord_t), 1, file);
::fread(&y, sizeof(coord_t), 1, file);
poly.points.emplace_back(Point(x * scale, y * scale));
}
m_trimming_polygons_deserialized.emplace_back(std::move(poly));
}
::fclose(file);
m_support_polygons_deserialized = simplify_polygons(m_support_polygons_deserialized, false);
//m_support_polygons_deserialized = to_polygons(union_ex(m_support_polygons_deserialized, false));
// Create an EdgeGrid, initialize it with projection, initialize signed distance field.
coord_t grid_resolution = coord_t(scale_(m_support_spacing));
BoundingBox bbox = get_extents(*m_support_polygons);
bbox.offset(20);
bbox.align_to_grid(grid_resolution);
m_grid.set_bbox(bbox);
m_grid.create(*m_support_polygons, grid_resolution);
m_grid.calculate_sdf();
// Sample a single point per input support polygon, keep it as a reference to maintain corresponding
// polygons if ever these polygons get split into parts by the trimming polygons.
m_island_samples = island_samples(*m_support_polygons);
return true;
}
const Polygons& support_polygons() const { return *m_support_polygons; }
const Polygons& trimming_polygons() const { return *m_trimming_polygons; }
const EdgeGrid::Grid& grid() const { return m_grid; }
#endif /* SLIC3R_DEBUG */
private:
SupportGridPattern() {}
SupportGridPattern& operator=(const SupportGridPattern &rhs);
#if 0
@ -639,6 +773,12 @@ private:
// Internal sample points of supporting expolygons. These internal points are used to pick regions corresponding
// to the initial supporting regions, after these regions werre grown and possibly split to many by the trimming polygons.
Points m_island_samples;
#ifdef SLIC3R_DEBUG
// support for deserialization of m_support_polygons, m_trimming_polygons
Polygons m_support_polygons_deserialized;
Polygons m_trimming_polygons_deserialized;
#endif /* SLIC3R_DEBUG */
};
namespace SupportMaterialInternal {
@ -783,17 +923,40 @@ namespace SupportMaterialInternal {
if (surface.surface_type == stBottomBridge && surface.bridge_angle != -1)
polygons_append(bridges, surface.expolygon);
//FIXME add the gap filled areas. Extrude the gaps with a bridge flow?
contact_polygons = diff(contact_polygons, bridges, true);
// Add the bridge anchors into the region.
// Remove the unsupported ends of the bridges from the bridged areas.
//FIXME add supports at regular intervals to support long bridges!
polygons_append(contact_polygons,
intersection(
bridges = diff(bridges,
// Offset unsupported edges into polygons.
offset(layerm->unsupported_bridge_edges.polylines, scale_(SUPPORT_MATERIAL_MARGIN), SUPPORT_SURFACES_OFFSET_PARAMETERS),
bridges));
offset(layerm->unsupported_bridge_edges.polylines, scale_(SUPPORT_MATERIAL_MARGIN), SUPPORT_SURFACES_OFFSET_PARAMETERS));
// Remove bridged areas from the supported areas.
contact_polygons = diff(contact_polygons, bridges, true);
}
}
#if 0
static int Test()
{
// for (int i = 0; i < 30; ++ i)
{
int i = -1;
// SupportGridPattern grid("d:\\temp\\support-top-contacts-final-run1-layer460-z70.300000-prev.bin", i);
// SupportGridPattern grid("d:\\temp\\support-top-contacts-final-run1-layer460-z70.300000.bin", i);
auto grid = SupportGridPattern::deserialize("d:\\temp\\support-top-contacts-final-run1-layer27-z5.650000.bin", i);
std::vector<std::pair<EdgeGrid::Grid::ContourEdge, EdgeGrid::Grid::ContourEdge>> intersections = grid.grid().intersecting_edges();
if (! intersections.empty())
printf("Intersections between contours!\n");
Slic3r::export_intersections_to_svg("d:\\temp\\support_polygon_intersections.svg", grid.support_polygons());
Slic3r::SVG::export_expolygons("d:\\temp\\support_polygons.svg", union_ex(grid.support_polygons(), false));
Slic3r::SVG::export_expolygons("d:\\temp\\trimming_polygons.svg", union_ex(grid.trimming_polygons(), false));
Polygons extracted = grid.extract_support(scale_(0.21 / 2), true);
Slic3r::SVG::export_expolygons("d:\\temp\\extracted.svg", union_ex(extracted, false));
printf("hu!");
}
return 0;
}
static int run_support_test = Test();
#endif /* SLIC3R_DEBUG */
// Generate top contact layers supporting overhangs.
// For a soluble interface material synchronize the layer heights with the object, otherwise leave the layer height undefined.
// If supports over bed surface only are requested, don't generate contact layers over an object.
@ -1096,6 +1259,8 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::top_contact_
}
}
// Achtung! The contact_polygons need to be trimmed by slices_margin_cached, otherwise
// the selection by island_samples (see the SupportGridPattern::island_samples() method) will not work!
SupportGridPattern support_grid_pattern(
// Support islands, to be stretched into a grid.
contact_polygons,
@ -1114,9 +1279,14 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::top_contact_
// Reduce the amount of dense interfaces: Do not generate dense interfaces below overhangs with 60% overhang of the extrusions.
Polygons dense_interface_polygons = diff(overhang_polygons,
offset2(lower_layer_polygons, - no_interface_offset * 0.5f, no_interface_offset * (0.6f + 0.5f), SUPPORT_SURFACES_OFFSET_PARAMETERS));
// offset(lower_layer_polygons, no_interface_offset * 0.6f, SUPPORT_SURFACES_OFFSET_PARAMETERS));
if (! dense_interface_polygons.empty()) {
//FIXME do it for the bridges only?
dense_interface_polygons =
// Achtung! The dense_interface_polygons need to be trimmed by slices_margin_cached, otherwise
// the selection by island_samples (see the SupportGridPattern::island_samples() method) will not work!
diff(
// Regularize the contour.
offset(dense_interface_polygons, no_interface_offset * 0.1f),
slices_margin_cached);
SupportGridPattern support_grid_pattern(
// Support islands, to be stretched into a grid.
dense_interface_polygons,
@ -1126,8 +1296,34 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::top_contact_
m_object_config->support_material_spacing.value + m_support_material_flow.spacing(),
Geometry::deg2rad(m_object_config->support_material_angle.value));
new_layer.polygons = support_grid_pattern.extract_support(m_support_material_flow.scaled_spacing()/2 + 5, false);
#ifdef SLIC3R_DEBUG
{
support_grid_pattern.serialize(debug_out_path("support-top-contacts-final-run%d-layer%d-z%f.bin", iRun, layer_id, layer.print_z));
BoundingBox bbox = get_extents(contact_polygons);
bbox.merge(get_extents(new_layer.polygons));
::Slic3r::SVG svg(debug_out_path("support-top-contacts-final0-run%d-layer%d-z%f.svg", iRun, layer_id, layer.print_z));
svg.draw(union_ex(*new_layer.contact_polygons, false), "gray", 0.5f);
svg.draw(union_ex(contact_polygons, false), "blue", 0.5f);
svg.draw(union_ex(dense_interface_polygons, false), "green", 0.5f);
svg.draw(union_ex(new_layer.polygons, true), "red", 0.5f);
svg.draw_outline(union_ex(new_layer.polygons, true), "black", "black", scale_(0.1f));
}
#endif /* SLIC3R_DEBUG */
}
}
#ifdef SLIC3R_DEBUG
{
BoundingBox bbox = get_extents(contact_polygons);
bbox.merge(get_extents(new_layer.polygons));
::Slic3r::SVG svg(debug_out_path("support-top-contacts-final-run%d-layer%d-z%f.svg", iRun, layer_id, layer.print_z));
svg.draw(union_ex(*new_layer.contact_polygons, false), "gray", 0.5f);
svg.draw(union_ex(contact_polygons, false), "blue", 0.5f);
svg.draw(union_ex(overhang_polygons, false), "green", 0.5f);
svg.draw(union_ex(new_layer.polygons, true), "red", 0.5f);
svg.draw_outline(union_ex(new_layer.polygons, true), "black", "black", scale_(0.1f));
}
#endif /* SLIC3R_DEBUG */
// Even after the contact layer was expanded into a grid, some of the contact islands may be too tiny to be extruded.
// Remove those tiny islands from new_layer.polygons and new_layer.contact_polygons.