3DPrinting/PrusaSlicer-NonPlainar
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Never scale TriangleMesh objects

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This commit is contained in:
Alessandro Ranellucci 2013-11-23 19:25:33 +01:00
parent 46e3b3180e
commit e75dbf37fa
6 changed files with 33 additions and 16 deletions
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2
lib/Slic3r/Layer.pm
View file

@ -11,7 +11,7 @@ has 'upper_layer' => (is => 'rw', weak_ref => 1);
has 'regions' => (is => 'ro', default => sub { [] });
has 'slicing_errors' => (is => 'rw');
has 'slice_z' => (is => 'ro', required => 1); # Z used for slicing in scaled coordinates
has 'slice_z' => (is => 'ro', required => 1); # Z used for slicing in unscaled coordinates
has 'print_z' => (is => 'ro', required => 1); # Z used for printing in unscaled coordinates
has 'height' => (is => 'ro', required => 1); # layer height in unscaled coordinates

2
lib/Slic3r/Layer/Region.pm
View file

@ -135,7 +135,7 @@ sub _merge_loops {
$slices = offset2_ex($slices, +$safety_offset, -$safety_offset);
Slic3r::debugf "Layer %d (slice_z = %.2f, print_z = %.2f): %d surface(s) having %d holes detected from %d polylines\n",
$self->id, unscale($self->slice_z), $self->print_z,
$self->id, $self->slice_z, $self->print_z,
scalar(@$slices), scalar(map @{$_->holes}, @$slices), scalar(@$loops)
if $Slic3r::debug;

9
lib/Slic3r/Print.pm
View file

@ -129,8 +129,6 @@ sub add_model {
$mesh->rotate($object->instances->[0]->rotation, $object->center_2D);
$mesh->scale($object->instances->[0]->scaling_factor);
}
$mesh->scale(1 / &Slic3r::SCALING_FACTOR);
$mesh->repair;
}
@ -140,6 +138,9 @@ sub add_model {
my @align2 = map -$bb->extents->[$_][MIN], (X,Y,Z);
$_->translate(@align2) for grep $_, @meshes;
my $scaled_bb = $bb->clone;
$scaled_bb->scale(1 / &Slic3r::SCALING_FACTOR);
# initialize print object
push @{$self->objects}, Slic3r::Print::Object->new(
print => $self,
@ -150,7 +151,7 @@ sub add_model {
? (map [ scale($_->offset->[X] - $align[X]) - $align2[X], scale($_->offset->[Y] - $align[Y]) - $align2[Y] ], @{$object->instances})
: [0,0],
],
size => $bb->size, # transformed size
size => $scaled_bb->size, # transformed size
input_file => $object->input_file,
config_overrides => $object->config,
layer_height_ranges => $object->layer_height_ranges,
@ -514,7 +515,7 @@ EOF
my @previous_layer_slices = ();
for my $layer_id (0..$self->layer_count-1) {
my @layers = map $_->layers->[$layer_id], @{$self->objects};
printf $fh qq{ <g id="layer%d" slic3r:z="%s">\n}, $layer_id, unscale +(grep defined $_, @layers)[0]->slice_z;
printf $fh qq{ <g id="layer%d" slic3r:z="%s">\n}, $layer_id, +(grep defined $_, @layers)[0]->slice_z;
my @current_layer_slices = ();
for my $obj_idx (0 .. $#{$self->objects}) {

2
lib/Slic3r/Print/Object.pm
View file

@ -63,7 +63,7 @@ sub BUILD {
id => $id,
height => $height,
print_z => $print_z,
slice_z => scale $slice_z,
slice_z => $slice_z,
);
if (@{$self->layers} >= 2) {
$self->layers->[-2]->upper_layer($self->layers->[-1]);

31
xs/src/TriangleMesh.cpp
View file

@ -165,7 +165,7 @@ void
TriangleMesh::slice(const std::vector<double> &z, std::vector<Polygons> &layers)
{
/*
This method gets called with a list of Z coordinates and outputs
This method gets called with a list of unscaled Z coordinates and outputs
a vector pointer having the same number of items as the original list.
Each item is a vector of polygons created by slicing our mesh at the
given heights.
@ -240,10 +240,21 @@ TriangleMesh::slice(const std::vector<double> &z, std::vector<Polygons> &layers)
std::vector<IntersectionLines> lines(z.size());
// clone shared vertices coordinates and scale them
stl_vertex* v_scaled_shared = (stl_vertex*)calloc(this->stl.stats.shared_vertices, sizeof(stl_vertex));
std::copy(this->stl.v_shared, this->stl.v_shared + this->stl.stats.shared_vertices, v_scaled_shared);
for (int i = 0; i < this->stl.stats.shared_vertices; i++) {
v_scaled_shared[i].x /= SCALING_FACTOR;
v_scaled_shared[i].y /= SCALING_FACTOR;
v_scaled_shared[i].z /= SCALING_FACTOR;
}
for (int facet_idx = 0; facet_idx < this->stl.stats.number_of_facets; facet_idx++) {
stl_facet* facet = &(this->stl.facet_start[facet_idx]);
float min_z = fminf(facet->vertex[0].z, fminf(facet->vertex[1].z, facet->vertex[2].z));
float max_z = fmaxf(facet->vertex[0].z, fmaxf(facet->vertex[1].z, facet->vertex[2].z));
stl_facet* facet = &this->stl.facet_start[facet_idx];
// find facet extents
double min_z = fminf(facet->vertex[0].z, fminf(facet->vertex[1].z, facet->vertex[2].z));
double max_z = fmaxf(facet->vertex[0].z, fmaxf(facet->vertex[1].z, facet->vertex[2].z));
#ifdef SLIC3R_DEBUG
printf("\n==> FACET %d (%f,%f,%f - %f,%f,%f - %f,%f,%f):\n", facet_idx,
@ -260,6 +271,7 @@ TriangleMesh::slice(const std::vector<double> &z, std::vector<Polygons> &layers)
continue;
}
// find layer extents
std::vector<double>::const_iterator min_layer, max_layer;
min_layer = std::lower_bound(z.begin(), z.end(), min_z); // first layer whose slice_z is >= min_z
max_layer = std::upper_bound(z.begin() + (min_layer - z.begin()), z.end(), max_z) - 1; // last layer whose slice_z is <= max_z
@ -269,7 +281,8 @@ TriangleMesh::slice(const std::vector<double> &z, std::vector<Polygons> &layers)
for (std::vector<double>::const_iterator it = min_layer; it != max_layer + 1; ++it) {
std::vector<double>::size_type layer_idx = it - z.begin();
double slice_z = *it;
double slice_z_u = *it; // unscaled
double slice_z = slice_z_u / SCALING_FACTOR;
std::vector<IntersectionPoint> points;
std::vector< std::vector<IntersectionPoint>::size_type > points_on_layer;
bool found_horizontal_edge = false;
@ -289,8 +302,8 @@ TriangleMesh::slice(const std::vector<double> &z, std::vector<Polygons> &layers)
int edge_id = facets_edges[facet_idx][j % 3];
int a_id = this->stl.v_indices[facet_idx].vertex[j % 3];
int b_id = this->stl.v_indices[facet_idx].vertex[(j+1) % 3];
stl_vertex* a = &(this->stl.v_shared[a_id]);
stl_vertex* b = &(this->stl.v_shared[b_id]);
stl_vertex* a = &v_scaled_shared[a_id];
stl_vertex* b = &v_scaled_shared[b_id];
if (a->z == b->z && a->z == slice_z) {
// edge is horizontal and belongs to the current layer
@ -298,7 +311,7 @@ TriangleMesh::slice(const std::vector<double> &z, std::vector<Polygons> &layers)
/* We assume that this method is never being called for horizontal
facets, so no other edge is going to be on this layer. */
IntersectionLine line;
if (facet->vertex[0].z < slice_z || facet->vertex[1].z < slice_z || facet->vertex[2].z < slice_z) {
if (facet->vertex[0].z < slice_z_u || facet->vertex[1].z < slice_z_u || facet->vertex[2].z < slice_z_u) {
line.edge_type = feTop;
std::swap(a, b);
std::swap(a_id, b_id);
@ -367,6 +380,8 @@ TriangleMesh::slice(const std::vector<double> &z, std::vector<Polygons> &layers)
}
}
free(v_scaled_shared);
// build loops
layers.resize(z.size());
for (std::vector<IntersectionLines>::iterator it = lines.begin(); it != lines.end(); ++it) {

3
xs/t/01_trianglemesh.t
View file

@ -80,9 +80,10 @@ my $cube = {
$m->repair;
my @z = (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) {
is scalar(@{$result->[$i]}), 1, 'number of returned polygons per layer';
is $result->[$i][0]->area, 20*20, 'size of returned polygon';
is $result->[$i][0]->area, 20*20/($SCALING_FACTOR**2), 'size of returned polygon';
ok $result->[$i][0]->is_counter_clockwise, 'orientation of returned polygon';
}
}