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Improved adaptive layer height metrics: Using the area of a triangle

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delimited by the extrusion stepping and the sloping surface.
This leads to a yet different metric from Cura or upstream Slic3r.
This commit is contained in:
bubnikv 2019-12-13 13:43:16 +01:00
parent 792ee1be62
commit 65772958b7
6 changed files with 218 additions and 221 deletions
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98
src/libslic3r/Slicing.cpp
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@ -224,38 +224,14 @@ std::vector<coordf_t> layer_height_profile_from_ranges(
// Based on the work of @platsch
// Fill layer_height_profile by heights ensuring a prescribed maximum cusp height.
#if ENABLE_ADAPTIVE_LAYER_HEIGHT_PROFILE
std::vector<double> layer_height_profile_adaptive(const SlicingParameters& slicing_params,
const ModelObject& object, float cusp_value)
#else
std::vector<coordf_t> layer_height_profile_adaptive(
const SlicingParameters &slicing_params,
const t_layer_config_ranges & /* layer_config_ranges */,
const ModelVolumePtrs &volumes)
#endif // ENABLE_ADAPTIVE_LAYER_HEIGHT_PROFILE
std::vector<double> layer_height_profile_adaptive(const SlicingParameters& slicing_params, const ModelObject& object, float quality_factor)
{
#if ENABLE_ADAPTIVE_LAYER_HEIGHT_PROFILE
// 1) Initialize the SlicingAdaptive class with the object meshes.
SlicingAdaptive as;
as.set_slicing_parameters(slicing_params);
as.set_object(object);
#else
// 1) Initialize the SlicingAdaptive class with the object meshes.
SlicingAdaptive as;
as.set_slicing_parameters(slicing_params);
for (const ModelVolume* volume : volumes)
if (volume->is_model_part())
as.add_mesh(&volume->mesh());
#endif // ENABLE_ADAPTIVE_LAYER_HEIGHT_PROFILE
as.prepare();
as.prepare(object);
// 2) Generate layers using the algorithm of @platsch
// loop until we have at least one layer and the max slice_z reaches the object height
#if !ENABLE_ADAPTIVE_LAYER_HEIGHT_PROFILE
double cusp_value = 0.2;
#endif // !ENABLE_ADAPTIVE_LAYER_HEIGHT_PROFILE
std::vector<double> layer_height_profile;
layer_height_profile.push_back(0.0);
layer_height_profile.push_back(slicing_params.first_object_layer_height);
@ -263,39 +239,41 @@ std::vector<coordf_t> layer_height_profile_adaptive(
layer_height_profile.push_back(slicing_params.first_object_layer_height);
layer_height_profile.push_back(slicing_params.first_object_layer_height);
}
double slice_z = slicing_params.first_object_layer_height;
int current_facet = 0;
#if ENABLE_ADAPTIVE_LAYER_HEIGHT_PROFILE
while (slice_z <= slicing_params.object_print_z_height()) {
double height = slicing_params.max_layer_height;
#else
double height = slicing_params.first_object_layer_height;
while ((slice_z - height) <= slicing_params.object_print_z_height()) {
height = 999.0;
#endif // ENABLE_ADAPTIVE_LAYER_HEIGHT_PROFILE
double print_z = slicing_params.first_object_layer_height;
// last facet visited by the as.next_layer_height() function, where the facets are sorted by their increasing Z span.
size_t current_facet = 0;
// loop until we have at least one layer and the max slice_z reaches the object height
while (print_z + EPSILON < slicing_params.object_print_z_height()) {
float height = slicing_params.max_layer_height;
// Slic3r::debugf "\n Slice layer: %d\n", $id;
// determine next layer height
double cusp_height = as.cusp_height((float)slice_z, cusp_value, current_facet);
float cusp_height = as.next_layer_height(float(print_z), quality_factor, current_facet);
#if 0
// check for horizontal features and object size
/*
if($self->config->get_value('match_horizontal_surfaces')) {
my $horizontal_dist = $adaptive_slicing[$region_id]->horizontal_facet_distance(scale $slice_z+$cusp_height, $min_height);
if(($horizontal_dist < $min_height) && ($horizontal_dist > 0)) {
Slic3r::debugf "Horizontal feature ahead, distance: %f\n", $horizontal_dist;
# can we shrink the current layer a bit?
if($cusp_height-($min_height-$horizontal_dist) > $min_height) {
# yes we can
$cusp_height = $cusp_height-($min_height-$horizontal_dist);
Slic3r::debugf "Shrink layer height to %f\n", $cusp_height;
}else{
# no, current layer would become too thin
$cusp_height = $cusp_height+$horizontal_dist;
Slic3r::debugf "Widen layer height to %f\n", $cusp_height;
if (this->config.match_horizontal_surfaces.value) {
coordf_t horizontal_dist = as.horizontal_facet_distance(print_z + height, min_layer_height);
if ((horizontal_dist < min_layer_height) && (horizontal_dist > 0)) {
#ifdef SLIC3R_DEBUG
std::cout << "Horizontal feature ahead, distance: " << horizontal_dist << std::endl;
#endif
// can we shrink the current layer a bit?
if (height-(min_layer_height - horizontal_dist) > min_layer_height) {
// yes we can
height -= (min_layer_height - horizontal_dist);
#ifdef SLIC3R_DEBUG
std::cout << "Shrink layer height to " << height << std::endl;
#endif
} else {
// no, current layer would become too thin
height += horizontal_dist;
#ifdef SLIC3R_DEBUG
std::cout << "Widen layer height to " << height << std::endl;
#endif
}
}
}
*/
#endif
height = std::min(cusp_height, height);
// apply z-gradation
@ -308,22 +286,22 @@ std::vector<coordf_t> layer_height_profile_adaptive(
// look for an applicable custom range
/*
if (my $range = first { $_->[0] <= $slice_z && $_->[1] > $slice_z } @{$self->layer_height_ranges}) {
if (my $range = first { $_->[0] <= $print_z && $_->[1] > $print_z } @{$self->layer_height_ranges}) {
$height = $range->[2];
# if user set custom height to zero we should just skip the range and resume slicing over it
if ($height == 0) {
$slice_z += $range->[1] - $range->[0];
$print_z += $range->[1] - $range->[0];
next;
}
}
*/
layer_height_profile.push_back(slice_z);
layer_height_profile.push_back(print_z);
layer_height_profile.push_back(height);
slice_z += height;
print_z += height;
#if !ENABLE_ADAPTIVE_LAYER_HEIGHT_PROFILE
layer_height_profile.push_back(slice_z);
layer_height_profile.push_back(print_z);
layer_height_profile.push_back(height);
#endif // !ENABLE_ADAPTIVE_LAYER_HEIGHT_PROFILE
}
@ -722,11 +700,7 @@ int generate_layer_height_texture(
const Vec3crd &color1 = palette_raw[idx1];
const Vec3crd &color2 = palette_raw[idx2];
coordf_t z = cell_to_z * coordf_t(cell);
#if ENABLE_ADAPTIVE_LAYER_HEIGHT_PROFILE
assert((lo - EPSILON <= z) && (z <= hi + EPSILON));
#else
assert(z >= lo && z <= hi);
#endif // ENABLE_ADAPTIVE_LAYER_HEIGHT_PROFILE
assert(lo - EPSILON <= z && z <= hi + EPSILON);
// Intensity profile to visualize the layers.
coordf_t intensity = cos(M_PI * 0.7 * (mid - z) / h);
// Color mapping from layer height to RGB.