3DPrinting/PrusaSlicer-NonPlainar
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Fix of Complete individual objects: "checker" bug #1911"

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Also fix of an arrangement issue for instances with some transformation
around X or Y axis applied.
This commit is contained in:
bubnikv 2019-04-18 12:45:43 +02:00
parent 63a0d1aeee
commit 5ec507e9ea
4 changed files with 34 additions and 35 deletions
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2
src/libslic3r/Model.cpp
View file

@ -943,7 +943,7 @@ BoundingBoxf3 ModelObject::instance_bounding_box(size_t instance_idx, bool dont_
// Calculate 2D convex hull of of a projection of the transformed printable volumes into the XY plane.
// This method is cheap in that it does not make any unnecessary copy of the volume meshes.
// This method is used by the auto arrange function.
Polygon ModelObject::convex_hull_2d(const Transform3d &trafo_instance)
Polygon ModelObject::convex_hull_2d(const Transform3d &trafo_instance) const
{
Points pts;
for (const ModelVolume *v : this->volumes)

2
src/libslic3r/Model.hpp
View file

@ -234,7 +234,7 @@ public:
// Calculate 2D convex hull of of a projection of the transformed printable volumes into the XY plane.
// This method is cheap in that it does not make any unnecessary copy of the volume meshes.
// This method is used by the auto arrange function.
Polygon convex_hull_2d(const Transform3d &trafo_instance);
Polygon convex_hull_2d(const Transform3d &trafo_instance) const;
#if ENABLE_VOLUMES_CENTERING_FIXES
void center_around_origin(bool include_modifiers = true);

31
src/libslic3r/ModelArrange.cpp
View file

@ -1,5 +1,6 @@
#include "ModelArrange.hpp"
#include "Model.hpp"
#include "Geometry.hpp"
#include "SVG.hpp"
#include <libnest2d.h>
@ -551,7 +552,7 @@ ShapeData2D projectModelFromTop(const Slic3r::Model &model) {
ret.reserve(s);
for(ModelObject* objptr : model.objects) {
if(objptr) {
if (! objptr->instances.empty()) {
// TODO export the exact 2D projection. Cannot do it as libnest2d
// does not support concave shapes (yet).
@ -572,23 +573,23 @@ ShapeData2D projectModelFromTop(const Slic3r::Model &model) {
clpath = Slic3rMultiPoint_to_ClipperPath(p);
}
Vec3d rotation0 = objptr->instances.front()->get_rotation();
rotation0(2) = 0.;
for(ModelInstance* objinst : objptr->instances) {
if(objinst) {
ClipperLib::Polygon pn;
pn.Contour = clpath;
ClipperLib::Polygon pn;
pn.Contour = clpath;
// Efficient conversion to item.
Item item(std::move(pn));
// Efficient conversion to item.
Item item(std::move(pn));
// Invalid geometries would throw exceptions when arranging
if(item.vertexCount() > 3) {
item.rotation(objinst->get_rotation(Z));
item.translation({
ClipperLib::cInt(objinst->get_offset(X)/SCALING_FACTOR),
ClipperLib::cInt(objinst->get_offset(Y)/SCALING_FACTOR)
});
ret.emplace_back(objinst, item);
}
// Invalid geometries would throw exceptions when arranging
if(item.vertexCount() > 3) {
item.rotation(float(Geometry::rotation_diff_z(rotation0, objinst->get_rotation()))),
item.translation({
ClipperLib::cInt(objinst->get_offset(X)/SCALING_FACTOR),
ClipperLib::cInt(objinst->get_offset(Y)/SCALING_FACTOR)
});
ret.emplace_back(objinst, item);
}
}
}

34
src/libslic3r/Print.cpp
View file

@ -1139,31 +1139,29 @@ std::string Print::validate() const
// Check horizontal clearance.
{
Polygons convex_hulls_other;
for (const PrintObject *object : m_objects) {
for (const PrintObject *print_object : m_objects) {
assert(! print_object->model_object()->instances.empty());
assert(! print_object->copies().empty());
// Get convex hull of all meshes assigned to this print object.
Polygon convex_hull;
{
Polygons mesh_convex_hulls;
for (const std::vector<int> &volumes : object->region_volumes)
for (int volume_id : volumes)
mesh_convex_hulls.emplace_back(object->model_object()->volumes[volume_id]->mesh.convex_hull());
// make a single convex hull for all of them
convex_hull = Slic3r::Geometry::convex_hull(mesh_convex_hulls);
}
// Apply the same transformations we apply to the actual meshes when slicing them.
object->model_object()->instances.front()->transform_polygon(&convex_hull);
ModelInstance *model_instance0 = print_object->model_object()->instances.front();
Vec3d rotation = model_instance0->get_rotation();
rotation.z() = 0.;
// Calculate the convex hull of a printable object centered around X=0,Y=0.
// Grow convex hull with the clearance margin.
// FIXME: Arrangement has different parameters for offsetting (jtMiter, limit 2)
// which causes that the warning will be showed after arrangement with the
// appropriate object distance. Even if I set this to jtMiter the warning still shows up.
convex_hull = offset(convex_hull, scale_(m_config.extruder_clearance_radius.value)/2, jtRound, scale_(0.1)).front();
Polygon convex_hull0 = offset(
print_object->model_object()->convex_hull_2d(
Geometry::assemble_transform(Vec3d::Zero(), rotation, model_instance0->get_scaling_factor(), model_instance0->get_mirror())),
scale_(m_config.extruder_clearance_radius.value) / 2., jtRound, scale_(0.1)).front();
// Now we check that no instance of convex_hull intersects any of the previously checked object instances.
for (const Point &copy : object->m_copies) {
Polygon p = convex_hull;
p.translate(copy);
if (! intersection(convex_hulls_other, p).empty())
for (const Point &copy : print_object->m_copies) {
Polygon convex_hull = convex_hull0;
convex_hull.translate(copy);
if (! intersection(convex_hulls_other, convex_hull).empty())
return L("Some objects are too close; your extruder will collide with them.");
polygons_append(convex_hulls_other, p);
polygons_append(convex_hulls_other, convex_hull);
}
}
}