3DPrinting/PrusaSlicer-NonPlainar
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Bugfix: tangent horizontal mesh surfaces were not included in slices under rare circumstances, generating almost invalid polygons that confused Clipper and caused skipped layers. Includes regression test

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This commit is contained in:
Alessandro Ranellucci 2015-01-28 13:00:38 +01:00
parent 8a5a0b6726
commit b1f1893481
4 changed files with 83 additions and 21 deletions
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42
xs/src/libslic3r/SVG.cpp
View File

@ -32,9 +32,17 @@ SVG::draw(const Line &line, std::string stroke)
}
void
SVG::AddLine(const IntersectionLine &line)
SVG::draw(const Lines &lines, std::string stroke)
{
this->draw(Line(line.a, line.b));
for (Lines::const_iterator it = lines.begin(); it != lines.end(); ++it)
this->draw(*it, stroke);
}
void
SVG::draw(const IntersectionLines &lines, std::string stroke)
{
for (IntersectionLines::const_iterator it = lines.begin(); it != lines.end(); ++it)
this->draw((Line)*it, stroke);
}
void
@ -50,11 +58,25 @@ SVG::draw(const ExPolygon &expolygon, std::string fill)
this->path(d, true);
}
void
SVG::draw(const ExPolygons &expolygons, std::string fill)
{
for (ExPolygons::const_iterator it = expolygons.begin(); it != expolygons.end(); ++it)
this->draw(*it, fill);
}
void
SVG::draw(const Polygon &polygon, std::string fill)
{
this->fill = fill;
this->path(this->get_path_d(polygon, true), true);
this->path(this->get_path_d(polygon, true), !fill.empty());
}
void
SVG::draw(const Polygons &polygons, std::string fill)
{
for (Polygons::const_iterator it = polygons.begin(); it != polygons.end(); ++it)
this->draw(*it, fill);
}
void
@ -64,6 +86,13 @@ SVG::draw(const Polyline &polyline, std::string stroke)
this->path(this->get_path_d(polyline, false), false);
}
void
SVG::draw(const Polylines &polylines, std::string stroke)
{
for (Polylines::const_iterator it = polylines.begin(); it != polylines.end(); ++it)
this->draw(*it, fill);
}
void
SVG::draw(const Point &point, std::string fill, unsigned int radius)
{
@ -75,6 +104,13 @@ SVG::draw(const Point &point, std::string fill, unsigned int radius)
fprintf(this->f, "%s\n", svg.str().c_str());
}
void
SVG::draw(const Points &points, std::string fill, unsigned int radius)
{
for (Points::const_iterator it = points.begin(); it != points.end(); ++it)
this->draw(*it, fill, radius);
}
void
SVG::path(const std::string &d, bool fill)
{

7
xs/src/libslic3r/SVG.hpp
View File

@ -15,12 +15,17 @@ class SVG
std::string fill, stroke;
SVG(const char* filename);
void AddLine(const IntersectionLine &line);
void draw(const Line &line, std::string stroke = "black");
void draw(const Lines &lines, std::string stroke = "black");
void draw(const IntersectionLines &lines, std::string stroke = "black");
void draw(const ExPolygon &expolygon, std::string fill = "grey");
void draw(const ExPolygons &expolygons, std::string fill = "grey");
void draw(const Polygon &polygon, std::string fill = "grey");
void draw(const Polygons &polygons, std::string fill = "grey");
void draw(const Polyline &polyline, std::string stroke = "black");
void draw(const Polylines &polylines, std::string stroke = "black");
void draw(const Point &point, std::string fill = "black", unsigned int radius = 3);
void draw(const Points &points, std::string fill = "black", unsigned int radius = 3);
void Close();
private:

36
xs/src/libslic3r/TriangleMesh.cpp
View File

@ -181,6 +181,7 @@ TriangleMesh::WriteOBJFile(char* output_file) {
void TriangleMesh::scale(float factor)
{
stl_scale(&(this->stl), factor);
stl_invalidate_shared_vertices(&this->stl);
}
void TriangleMesh::scale(const Pointf3 &versor)
@ -190,41 +191,49 @@ void TriangleMesh::scale(const Pointf3 &versor)
fversor[1] = versor.y;
fversor[2] = versor.z;
stl_scale_versor(&this->stl, fversor);
stl_invalidate_shared_vertices(&this->stl);
}
void TriangleMesh::translate(float x, float y, float z)
{
stl_translate_relative(&(this->stl), x, y, z);
stl_invalidate_shared_vertices(&this->stl);
}
void TriangleMesh::rotate_x(float angle)
{
stl_rotate_x(&(this->stl), angle);
stl_invalidate_shared_vertices(&this->stl);
}
void TriangleMesh::rotate_y(float angle)
{
stl_rotate_y(&(this->stl), angle);
stl_invalidate_shared_vertices(&this->stl);
}
void TriangleMesh::rotate_z(float angle)
{
stl_rotate_z(&(this->stl), angle);
stl_invalidate_shared_vertices(&this->stl);
}
void TriangleMesh::flip_x()
{
stl_mirror_yz(&this->stl);
stl_invalidate_shared_vertices(&this->stl);
}
void TriangleMesh::flip_y()
{
stl_mirror_xz(&this->stl);
stl_invalidate_shared_vertices(&this->stl);
}
void TriangleMesh::flip_z()
{
stl_mirror_xy(&this->stl);
stl_invalidate_shared_vertices(&this->stl);
}
void TriangleMesh::align_to_origin()
@ -507,7 +516,7 @@ TriangleMeshSlicer::slice(const std::vector<float> &z, std::vector<ExPolygons>*
for (std::vector<Polygons>::const_iterator loops = layers_p.begin(); loops != layers_p.end(); ++loops) {
#ifdef SLIC3R_DEBUG
size_t layer_id = loops - layers_p.begin();
printf("Layer %zu (slice_z = %.2f): ", layer_id, z[layer_id]);
printf("Layer %zu (slice_z = %.2f):\n", layer_id, z[layer_id]);
#endif
this->make_expolygons(*loops, &(*layers)[ loops - layers_p.begin() ]);
@ -542,15 +551,19 @@ TriangleMeshSlicer::slice_facet(float slice_z, const stl_facet &facet, const int
if (a->z == b->z && a->z == slice_z) {
// edge is horizontal and belongs to the current layer
/* We assume that this method is never being called for horizontal
facets, so no other edge is going to be on this layer. */
stl_vertex* v0 = &this->v_scaled_shared[ this->mesh->stl.v_indices[facet_idx].vertex[0] ];
stl_vertex* v1 = &this->v_scaled_shared[ this->mesh->stl.v_indices[facet_idx].vertex[1] ];
stl_vertex* v2 = &this->v_scaled_shared[ this->mesh->stl.v_indices[facet_idx].vertex[2] ];
stl_vertex &v0 = this->v_scaled_shared[ this->mesh->stl.v_indices[facet_idx].vertex[0] ];
stl_vertex &v1 = this->v_scaled_shared[ this->mesh->stl.v_indices[facet_idx].vertex[1] ];
stl_vertex &v2 = this->v_scaled_shared[ this->mesh->stl.v_indices[facet_idx].vertex[2] ];
IntersectionLine line;
if (min_z == max_z) {
line.edge_type = feHorizontal;
} else if (v0->z < slice_z || v1->z < slice_z || v2->z < slice_z) {
if (this->mesh->stl.facet_start[facet_idx].normal.z < 0) {
/* if normal points downwards this is a bottom horizontal facet so we reverse
its point order */
std::swap(a, b);
std::swap(a_id, b_id);
}
} else if (v0.z < slice_z || v1.z < slice_z || v2.z < slice_z) {
line.edge_type = feTop;
std::swap(a, b);
std::swap(a_id, b_id);
@ -624,12 +637,9 @@ TriangleMeshSlicer::slice_facet(float slice_z, const stl_facet &facet, const int
void
TriangleMeshSlicer::make_loops(std::vector<IntersectionLine> &lines, Polygons* loops)
{
/*
SVG svg("lines.svg");
for (IntersectionLines::iterator line = lines.begin(); line != lines.end(); ++line) {
svg.AddLine(*line);
}
svg.draw(lines);
svg.Close();
*/
@ -837,9 +847,9 @@ TriangleMeshSlicer::make_expolygons(const Polygons &loops, ExPolygons* slices)
of the loops, since the Orientation() function provided by Clipper
would do the same, thus repeating the calculation */
Polygons::const_iterator loop = loops.begin() + *loop_idx;
if (area[*loop_idx] >= 0) {
if (area[*loop_idx] > +EPSILON) {
p_slices.push_back(*loop);
} else {
} else if (area[*loop_idx] < -EPSILON) {
diff(p_slices, *loop, &p_slices);
}
}

17
xs/t/01_trianglemesh.t
View File

@ -4,7 +4,7 @@ use strict;
use warnings;
use Slic3r::XS;
use Test::More tests => 46;
use Test::More tests => 49;
is Slic3r::TriangleMesh::hello_world(), 'Hello world!',
'hello world';
@ -79,7 +79,7 @@ my $cube = {
my $m = Slic3r::TriangleMesh->new;
$m->ReadFromPerl($cube->{vertices}, $cube->{facets});
$m->repair;
my @z = (2,4,8,6,8,10,12,14,16,18,20);
my @z = (0,2,4,8,6,8,10,12,14,16,18,20);
my $result = $m->slice(\@z);
my $SCALING_FACTOR = 0.000001;
for my $i (0..$#z) {
@ -95,8 +95,19 @@ my $cube = {
[ [0,1,2],[2,1,3],[1,0,4],[5,1,4],[0,2,4],[4,2,6],[7,6,8],[4,6,7],[9,4,7],[7,8,10],[2,3,6],[11,3,12],[7,12,9],[13,12,7],[6,3,11],[11,12,13],[3,1,5],[12,3,5],[5,4,9],[12,5,9],[13,7,10],[14,13,10],[8,15,10],[10,15,14],[6,11,8],[8,11,15],[15,11,13],[14,15,13] ],
);
$m->repair;
{
# at Z = 10 we have a top horizontal surface
my $slices = $m->slice([ 5, 10 ]);
is $slices->[0][0]->area, $slices->[1][0]->area, 'slicing a tangent plane includes its area';
is $slices->[0][0]->area, $slices->[1][0]->area, 'slicing a top tangent plane includes its area';
}
$m->flip_z;
{
# this second test also checks that performing a second slice on a mesh after
# a transformation works properly (shared_vertices is correctly invalidated);
# at Z = -10 we have a bottom horizontal surface
my $slices = $m->slice([ -5, -10 ]);
is $slices->[0][0]->area, $slices->[1][0]->area, 'slicing a bottom tangent plane includes its area';
}
}
{