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OrcaSlicer-KX/src/libslic3r/GCode/CoolingBuffer.cpp
Noisyfox b90b8eda39 Exclude movements before first extrusion from layer time calculation when dealing with layer cooling (SoftFever/OrcaSlicer#7171) 
If layer starts with a color change, the full layer time will be much longer, which will trick the slicer to think this layer has enough cooling time.
However the actual filament extrusion time (the real "printing" part) won't necessarily have enough time to cool down, so if we don't do extra slowing down
before starting next layer, the filament could still be soft and lead to worse surface quality.
2024-10-24 17:24:09 +08:00

938 lines
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#include "../GCode.hpp"
#include "CoolingBuffer.hpp"
#include <boost/algorithm/string/predicate.hpp>
#include <boost/algorithm/string/replace.hpp>
#include <boost/log/trivial.hpp>
#include <iostream>
#include <float.h>
#include <system_error>
#include <unordered_map>
#if 0
#define DEBUG
#define _DEBUG
#undef NDEBUG
#endif
#include <assert.h>
namespace Slic3r {
CoolingBuffer::CoolingBuffer(GCode &gcodegen) : m_config(gcodegen.config()), m_toolchange_prefix(gcodegen.writer().toolchange_prefix()), m_current_extruder(0)
{
this->reset(gcodegen.writer().get_position());
const std::vector<Extruder> &extruders = gcodegen.writer().extruders();
m_extruder_ids.reserve(extruders.size());
for (const Extruder &ex : extruders) {
m_num_extruders = std::max(ex.id() + 1, m_num_extruders);
m_extruder_ids.emplace_back(ex.id());
}
}
void CoolingBuffer::reset(const Vec3d &position)
{
// BBS: add I and J axis to store center of arc
m_current_pos.assign(7, 0.f);
m_current_pos[0] = float(position.x());
m_current_pos[1] = float(position.y());
m_current_pos[2] = float(position.z());
m_current_pos[4] = float(m_config.travel_speed.value);
m_fan_speed = -1;
m_additional_fan_speed = -1;
m_current_fan_speed = -1;
}
struct CoolingLine
{
enum Type {
TYPE_SET_TOOL = 1 << 0,
TYPE_EXTRUDE_END = 1 << 1,
TYPE_OVERHANG_FAN_START = 1 << 2,
TYPE_OVERHANG_FAN_END = 1 << 3,
TYPE_G0 = 1 << 4,
TYPE_G1 = 1 << 5,
TYPE_ADJUSTABLE = 1 << 6,
TYPE_EXTERNAL_PERIMETER = 1 << 7,
// The line sets a feedrate.
TYPE_HAS_F = 1 << 8,
TYPE_WIPE = 1 << 9,
TYPE_G4 = 1 << 10,
TYPE_G92 = 1 << 11,
//BBS: add G2 G3 type
TYPE_G2 = 1 << 12,
TYPE_G3 = 1 << 13,
TYPE_FORCE_RESUME_FAN = 1 << 14,
TYPE_SUPPORT_INTERFACE_FAN_START = 1 << 15,
TYPE_SUPPORT_INTERFACE_FAN_END = 1 << 16,
};
CoolingLine(unsigned int type, size_t line_start, size_t line_end) :
type(type), line_start(line_start), line_end(line_end),
length(0.f), feedrate(0.f), time(0.f), time_max(0.f), slowdown(false) {}
bool adjustable(bool slowdown_external_perimeters) const {
return (this->type & TYPE_ADJUSTABLE) &&
(! (this->type & TYPE_EXTERNAL_PERIMETER) || slowdown_external_perimeters) &&
this->time < this->time_max;
}
bool adjustable() const {
return (this->type & TYPE_ADJUSTABLE) && this->time < this->time_max;
}
size_t type;
// Start of this line at the G-code snippet.
size_t line_start;
// End of this line at the G-code snippet.
size_t line_end;
// XY Euclidian length of this segment.
float length;
// Current feedrate, possibly adjusted.
float feedrate;
// Current duration of this segment.
float time;
// Maximum duration of this segment.
float time_max;
// If marked with the "slowdown" flag, the line has been slowed down.
bool slowdown;
};
// Calculate the required per extruder time stretches.
struct PerExtruderAdjustments
{
// Calculate the total elapsed time per this extruder, adjusted for the slowdown.
float elapsed_time_total() const {
float time_total = 0.f;
for (const CoolingLine &line : lines)
time_total += line.time;
return time_total;
}
// Calculate the total elapsed time when slowing down
// to the minimum extrusion feed rate defined for the current material.
float maximum_time_after_slowdown(bool slowdown_external_perimeters) const {
float time_total = 0.f;
for (const CoolingLine &line : lines)
if (line.adjustable(slowdown_external_perimeters)) {
if (line.time_max == FLT_MAX)
return FLT_MAX;
else
time_total += line.time_max;
} else
time_total += line.time;
return time_total;
}
// Calculate the adjustable part of the total time.
float adjustable_time(bool slowdown_external_perimeters) const {
float time_total = 0.f;
for (const CoolingLine &line : lines)
if (line.adjustable(slowdown_external_perimeters))
time_total += line.time;
return time_total;
}
// Calculate the non-adjustable part of the total time.
float non_adjustable_time(bool slowdown_external_perimeters) const {
float time_total = 0.f;
for (const CoolingLine &line : lines)
if (! line.adjustable(slowdown_external_perimeters))
time_total += line.time;
return time_total;
}
// Slow down the adjustable extrusions to the minimum feedrate allowed for the current extruder material.
// Used by both proportional and non-proportional slow down.
float slowdown_to_minimum_feedrate(bool slowdown_external_perimeters) {
float time_total = 0.f;
for (CoolingLine &line : lines) {
if (line.adjustable(slowdown_external_perimeters)) {
assert(line.time_max >= 0.f && line.time_max < FLT_MAX);
line.slowdown = true;
line.time = line.time_max;
line.feedrate = line.length / line.time;
}
time_total += line.time;
}
return time_total;
}
// Slow down each adjustable G-code line proportionally by a factor.
// Used by the proportional slow down.
float slow_down_proportional(float factor, bool slowdown_external_perimeters) {
assert(factor >= 1.f);
float time_total = 0.f;
for (CoolingLine &line : lines) {
if (line.adjustable(slowdown_external_perimeters)) {
line.slowdown = true;
line.time = std::min(line.time_max, line.time * factor);
line.feedrate = line.length / line.time;
}
time_total += line.time;
}
return time_total;
}
// Sort the lines, adjustable first, higher feedrate first.
// Used by non-proportional slow down.
void sort_lines_by_decreasing_feedrate() {
std::sort(lines.begin(), lines.end(), [](const CoolingLine &l1, const CoolingLine &l2) {
bool adj1 = l1.adjustable();
bool adj2 = l2.adjustable();
return (adj1 == adj2) ? l1.feedrate > l2.feedrate : adj1;
});
for (n_lines_adjustable = 0;
n_lines_adjustable < lines.size() && this->lines[n_lines_adjustable].adjustable();
++ n_lines_adjustable);
time_non_adjustable = 0.f;
for (size_t i = n_lines_adjustable; i < lines.size(); ++ i)
time_non_adjustable += lines[i].time;
}
// Calculate the maximum time stretch when slowing down to min_feedrate.
// Slowdown to min_feedrate shall be allowed for this extruder's material.
// Used by non-proportional slow down.
float time_stretch_when_slowing_down_to_feedrate(float min_feedrate) const {
float time_stretch = 0.f;
assert(this->slow_down_min_speed < min_feedrate + EPSILON);
for (size_t i = 0; i < n_lines_adjustable; ++ i) {
const CoolingLine &line = lines[i];
if (line.feedrate > min_feedrate)
time_stretch += line.time * (line.feedrate / min_feedrate - 1.f);
}
return time_stretch;
}
// Slow down all adjustable lines down to min_feedrate.
// Slowdown to min_feedrate shall be allowed for this extruder's material.
// Used by non-proportional slow down.
void slow_down_to_feedrate(float min_feedrate) {
assert(this->slow_down_min_speed < min_feedrate + EPSILON);
for (size_t i = 0; i < n_lines_adjustable; ++ i) {
CoolingLine &line = lines[i];
if (line.feedrate > min_feedrate) {
line.time *= std::max(1.f, line.feedrate / min_feedrate);
line.feedrate = min_feedrate;
line.slowdown = true;
}
}
}
// Extruder, for which the G-code will be adjusted.
unsigned int extruder_id = 0;
// Is the cooling slow down logic enabled for this extruder's material?
bool cooling_slow_down_enabled = false;
// Slow down the print down to slow_down_min_speed if the total layer time is below slow_down_layer_time.
float slow_down_layer_time = 0.f;
// Minimum print speed allowed for this extruder.
float slow_down_min_speed = 0.f;
bool dont_slow_down_outer_wall = false;
// Parsed lines.
std::vector<CoolingLine> lines;
// The following two values are set by sort_lines_by_decreasing_feedrate():
// Number of adjustable lines, at the start of lines.
size_t n_lines_adjustable = 0;
// Non-adjustable time of lines starting with n_lines_adjustable.
float time_non_adjustable = 0;
// Current total time for this extruder.
float time_total = 0;
// Maximum time for this extruder, when the maximum slow down is applied.
float time_maximum = 0;
// Temporaries for processing the slow down. Both thresholds go from 0 to n_lines_adjustable.
size_t idx_line_begin = 0;
size_t idx_line_end = 0;
};
// Calculate a new feedrate when slowing down by time_stretch for segments faster than min_feedrate.
// Used by non-proportional slow down.
float new_feedrate_to_reach_time_stretch(
std::vector<PerExtruderAdjustments*>::const_iterator it_begin, std::vector<PerExtruderAdjustments*>::const_iterator it_end,
float min_feedrate, float time_stretch, size_t max_iter = 20)
{
float new_feedrate = min_feedrate;
for (size_t iter = 0; iter < max_iter; ++ iter) {
double nomin = 0;
double denom = time_stretch;
for (auto it = it_begin; it != it_end; ++ it) {
assert((*it)->slow_down_min_speed < min_feedrate + EPSILON);
for (size_t i = 0; i < (*it)->n_lines_adjustable; ++i) {
const CoolingLine &line = (*it)->lines[i];
if (line.feedrate > min_feedrate) {
nomin += (double)line.time * (double)line.feedrate;
denom += (double)line.time;
}
}
}
assert(denom > 0);
if (denom < 0)
return min_feedrate;
new_feedrate = (float)(nomin / denom);
assert(new_feedrate > min_feedrate - EPSILON);
if (new_feedrate < min_feedrate + EPSILON)
goto finished;
for (auto it = it_begin; it != it_end; ++ it)
for (size_t i = 0; i < (*it)->n_lines_adjustable; ++i) {
const CoolingLine &line = (*it)->lines[i];
if (line.feedrate > min_feedrate && line.feedrate < new_feedrate)
// Some of the line segments taken into account in the calculation of nomin / denom are now slower than new_feedrate,
// which makes the new_feedrate lower than it should be.
// Re-run the calculation with a new min_feedrate limit, so that the segments with current feedrate lower than new_feedrate
// are not taken into account.
goto not_finished_yet;
}
goto finished;
not_finished_yet:
min_feedrate = new_feedrate;
}
// Failed to find the new feedrate for the time_stretch.
finished:
// Test whether the time_stretch was achieved.
#ifndef NDEBUG
{
float time_stretch_final = 0.f;
for (auto it = it_begin; it != it_end; ++ it)
time_stretch_final += (*it)->time_stretch_when_slowing_down_to_feedrate(new_feedrate);
assert(std::abs(time_stretch - time_stretch_final) < EPSILON);
}
#endif /* NDEBUG */
return new_feedrate;
}
std::string CoolingBuffer::process_layer(std::string &&gcode, size_t layer_id, bool flush)
{
// Cache the input G-code.
if (m_gcode.empty())
m_gcode = std::move(gcode);
else
m_gcode += gcode;
std::string out;
if (flush) {
// This is either an object layer or the very last print layer. Calculate cool down over the collected support layers
// and one object layer.
std::vector<PerExtruderAdjustments> per_extruder_adjustments = this->parse_layer_gcode(m_gcode, m_current_pos);
float layer_time_stretched = this->calculate_layer_slowdown(per_extruder_adjustments);
out = this->apply_layer_cooldown(m_gcode, layer_id, layer_time_stretched, per_extruder_adjustments);
m_gcode.clear();
}
return out;
}
// Parse the layer G-code for the moves, which could be adjusted.
// Return the list of parsed lines, bucketed by an extruder.
std::vector<PerExtruderAdjustments> CoolingBuffer::parse_layer_gcode(const std::string &gcode, std::vector<float> &current_pos) const
{
std::vector<PerExtruderAdjustments> per_extruder_adjustments(m_extruder_ids.size());
std::vector<size_t> map_extruder_to_per_extruder_adjustment(m_num_extruders, 0);
for (size_t i = 0; i < m_extruder_ids.size(); ++ i) {
PerExtruderAdjustments &adj = per_extruder_adjustments[i];
unsigned int extruder_id = m_extruder_ids[i];
adj.extruder_id = extruder_id;
adj.cooling_slow_down_enabled = m_config.slow_down_for_layer_cooling.get_at(extruder_id);
adj.slow_down_layer_time = float(m_config.slow_down_layer_time.get_at(extruder_id));
adj.slow_down_min_speed = float(m_config.slow_down_min_speed.get_at(extruder_id));
// ORCA: To enable dont slow down external perimeters feature per filament (extruder)
adj.dont_slow_down_outer_wall = m_config.dont_slow_down_outer_wall.get_at(extruder_id);
map_extruder_to_per_extruder_adjustment[extruder_id] = i;
}
unsigned int current_extruder = m_current_extruder;
PerExtruderAdjustments *adjustment = &per_extruder_adjustments[map_extruder_to_per_extruder_adjustment[current_extruder]];
const char *line_start = gcode.c_str();
const char *line_end = line_start;
// Index of an existing CoolingLine of the current adjustment, which holds the feedrate setting command
// for a sequence of extrusion moves.
size_t active_speed_modifier = size_t(-1);
// Orca: Whether we had our first extrusion in this layer.
// Time of any other movements before the first extrusion will be excluded from the layer time.
bool layer_had_extrusion = false;
for (; *line_start != 0; line_start = line_end)
{
while (*line_end != '\n' && *line_end != 0)
++ line_end;
// sline will not contain the trailing '\n'.
std::string sline(line_start, line_end);
// CoolingLine will contain the trailing '\n'.
if (*line_end == '\n')
++ line_end;
CoolingLine line(0, line_start - gcode.c_str(), line_end - gcode.c_str());
if (boost::starts_with(sline, "G0 "))
line.type = CoolingLine::TYPE_G0;
else if (boost::starts_with(sline, "G1 "))
line.type = CoolingLine::TYPE_G1;
else if (boost::starts_with(sline, "G92 "))
line.type = CoolingLine::TYPE_G92;
else if (boost::starts_with(sline, "G2 "))
line.type = CoolingLine::TYPE_G2;
else if (boost::starts_with(sline, "G3 "))
line.type = CoolingLine::TYPE_G3;
if (line.type) {
// G0, G1 or G92
// Parse the G-code line.
std::vector<float> new_pos(current_pos);
const char *c = sline.data() + 3;
for (;;) {
// Skip whitespaces.
for (; *c == ' ' || *c == '\t'; ++ c);
if (*c == 0 || *c == ';')
break;
assert(is_decimal_separator_point()); // for atof
//BBS: Parse the axis.
size_t axis = (*c >= 'X' && *c <= 'Z') ? (*c - 'X') :
(*c == 'E') ? 3 : (*c == 'F') ? 4 :
(*c == 'I') ? 5 : (*c == 'J') ? 6 : size_t(-1);
if (axis != size_t(-1)) {
new_pos[axis] = float(atof(++c));
if (axis == 4) {
// Convert mm/min to mm/sec.
new_pos[4] /= 60.f;
if ((line.type & CoolingLine::TYPE_G92) == 0)
// This is G0 or G1 line and it sets the feedrate. This mark is used for reducing the duplicate F calls.
line.type |= CoolingLine::TYPE_HAS_F;
} else if (axis == 5 || axis == 6) {
// BBS: get position of arc center
new_pos[axis] += current_pos[axis - 5];
}
}
// Skip this word.
for (; *c != ' ' && *c != '\t' && *c != 0; ++ c);
}
bool external_perimeter = boost::contains(sline, ";_EXTERNAL_PERIMETER");
bool wipe = boost::contains(sline, ";_WIPE");
if (external_perimeter)
line.type |= CoolingLine::TYPE_EXTERNAL_PERIMETER;
if (wipe)
line.type |= CoolingLine::TYPE_WIPE;
// Orca: only slow down movements since the first extrusion
if (boost::contains(sline, ";_EXTRUDE_SET_SPEED"))
layer_had_extrusion = true;
// ORCA: Dont slowdown external perimeters for layer time feature
// use the adjustment pointer to ensure the value for the current extruder (filament) is used.
bool adjust_external = true;
if(adjustment->dont_slow_down_outer_wall && external_perimeter) adjust_external = false;
// ORCA: Dont slowdown external perimeters for layer time works by not marking the external perimeter as adjustable,
// hence the slowdown algorithm ignores it.
if (boost::contains(sline, ";_EXTRUDE_SET_SPEED") && ! wipe && adjust_external) {
line.type |= CoolingLine::TYPE_ADJUSTABLE;
active_speed_modifier = adjustment->lines.size();
}
if ((line.type & CoolingLine::TYPE_G92) == 0) {
//BBS: G0, G1, G2, G3. Calculate the duration.
if (m_config.use_relative_e_distances.value)
// Reset extruder accumulator.
current_pos[3] = 0.f;
float dif[4];
for (size_t i = 0; i < 4; ++ i)
dif[i] = new_pos[i] - current_pos[i];
float dxy2 = 0;
//BBS: support to calculate length of arc
if (line.type & CoolingLine::TYPE_G2 || line.type & CoolingLine::TYPE_G3) {
Vec3f start(current_pos[0], current_pos[1], 0);
Vec3f end(new_pos[0], new_pos[1], 0);
Vec3f center(new_pos[5], new_pos[6], 0);
bool is_ccw = line.type & CoolingLine::TYPE_G3;
float dxy = ArcSegment::calc_arc_length(start, end, center, is_ccw);
dxy2 = dxy * dxy;
} else {
dxy2 = dif[0] * dif[0] + dif[1] * dif[1];
}
float dxyz2 = dxy2 + dif[2] * dif[2];
if (dxyz2 > 0.f) {
// Movement in xyz, calculate time from the xyz Euclidian distance.
line.length = sqrt(dxyz2);
} else if (std::abs(dif[3]) > 0.f) {
// Movement in the extruder axis.
line.length = std::abs(dif[3]);
}
line.feedrate = new_pos[4];
assert((line.type & CoolingLine::TYPE_ADJUSTABLE) == 0 || line.feedrate > 0.f);
if (line.length > 0)
line.time = line.length / line.feedrate;
line.time_max = line.time;
if ((line.type & CoolingLine::TYPE_ADJUSTABLE) || active_speed_modifier != size_t(-1))
line.time_max = (adjustment->slow_down_min_speed == 0.f) ? FLT_MAX : std::max(line.time, line.length / adjustment->slow_down_min_speed);
// BBS: add G2 and G3 support
if (active_speed_modifier < adjustment->lines.size() && ((line.type & CoolingLine::TYPE_G1) ||
(line.type & CoolingLine::TYPE_G2) ||
(line.type & CoolingLine::TYPE_G3))) {
// Inside the ";_EXTRUDE_SET_SPEED" blocks, there must not be a G1 Fxx entry.
assert((line.type & CoolingLine::TYPE_HAS_F) == 0);
CoolingLine &sm = adjustment->lines[active_speed_modifier];
assert(sm.feedrate > 0.f);
sm.length += line.length;
sm.time += line.time;
if (sm.time_max != FLT_MAX) {
if (line.time_max == FLT_MAX)
sm.time_max = FLT_MAX;
else
sm.time_max += line.time_max;
}
// Don't store this line.
line.type = 0;
}
}
current_pos = std::move(new_pos);
} else if (boost::starts_with(sline, ";_EXTRUDE_END")) {
line.type = CoolingLine::TYPE_EXTRUDE_END;
active_speed_modifier = size_t(-1);
} else if (boost::starts_with(sline, m_toolchange_prefix)) {
unsigned int new_extruder = 0;
auto ret = std::from_chars(sline.data() + m_toolchange_prefix.size(), sline.data() + sline.size(), new_extruder);
if (std::errc::invalid_argument != ret.ec) {
// Only change extruder in case the number is meaningful. User could provide an out-of-range index through custom gcodes -
// those shall be ignored.
if (new_extruder < map_extruder_to_per_extruder_adjustment.size()) {
if (new_extruder != current_extruder) {
// Switch the tool.
line.type = CoolingLine::TYPE_SET_TOOL;
current_extruder = new_extruder;
adjustment = &per_extruder_adjustments[map_extruder_to_per_extruder_adjustment[current_extruder]];
}
} else {
// Only log the error in case of MM printer. Single extruder printers likely ignore any T anyway.
if (map_extruder_to_per_extruder_adjustment.size() > 1)
BOOST_LOG_TRIVIAL(error) << "CoolingBuffer encountered an invalid toolchange, maybe from a custom gcode: " << sline;
}
}
} else if (boost::starts_with(sline, ";_OVERHANG_FAN_START")) {
line.type = CoolingLine::TYPE_OVERHANG_FAN_START;
} else if (boost::starts_with(sline, ";_OVERHANG_FAN_END")) {
line.type = CoolingLine::TYPE_OVERHANG_FAN_END;
} else if (boost::starts_with(sline, ";_SUPP_INTERFACE_FAN_START")) {
line.type = CoolingLine::TYPE_SUPPORT_INTERFACE_FAN_START;
} else if (boost::starts_with(sline, ";_SUPP_INTERFACE_FAN_END")) {
line.type = CoolingLine::TYPE_SUPPORT_INTERFACE_FAN_END;
} else if (boost::starts_with(sline, "G4 ")) {
// Parse the wait time.
line.type = CoolingLine::TYPE_G4;
size_t pos_S = sline.find('S', 3);
size_t pos_P = sline.find('P', 3);
assert(is_decimal_separator_point()); // for atof
line.time = line.time_max = float(
(pos_S > 0) ? atof(sline.c_str() + pos_S + 1) :
(pos_P > 0) ? atof(sline.c_str() + pos_P + 1) * 0.001 : 0.);
} else if (boost::starts_with(sline, ";_FORCE_RESUME_FAN_SPEED")) {
line.type = CoolingLine::TYPE_FORCE_RESUME_FAN;
}
// Orca: For any movements before this layer's first ever extrusion, we exclude them from the layer time calculation.
if (!layer_had_extrusion) {
assert((line.type & CoolingLine::TYPE_ADJUSTABLE) == 0);
line.time = line.time_max = 0;
}
if (line.type != 0)
adjustment->lines.emplace_back(std::move(line));
}
return per_extruder_adjustments;
}
// Slow down an extruder range to slow_down_layer_time.
// Return the total time for the complete layer.
static inline void extruder_range_slow_down_non_proportional(
std::vector<PerExtruderAdjustments*>::iterator it_begin,
std::vector<PerExtruderAdjustments*>::iterator it_end,
float time_stretch)
{
// Slow down. Try to equalize the feedrates.
std::vector<PerExtruderAdjustments*> by_min_print_speed(it_begin, it_end);
// Find the next highest adjustable feedrate among the extruders.
float feedrate = 0;
for (PerExtruderAdjustments *adj : by_min_print_speed) {
adj->idx_line_begin = 0;
adj->idx_line_end = 0;
assert(adj->idx_line_begin < adj->n_lines_adjustable);
if (adj->lines[adj->idx_line_begin].feedrate > feedrate)
feedrate = adj->lines[adj->idx_line_begin].feedrate;
}
assert(feedrate > 0.f);
// Sort by slow_down_min_speed, maximum speed first.
std::sort(by_min_print_speed.begin(), by_min_print_speed.end(),
[](const PerExtruderAdjustments *p1, const PerExtruderAdjustments *p2){ return p1->slow_down_min_speed > p2->slow_down_min_speed; });
// Slow down, fast moves first.
for (;;) {
// For each extruder, find the span of lines with a feedrate close to feedrate.
for (PerExtruderAdjustments *adj : by_min_print_speed) {
for (adj->idx_line_end = adj->idx_line_begin;
adj->idx_line_end < adj->n_lines_adjustable && adj->lines[adj->idx_line_end].feedrate > feedrate - EPSILON;
++ adj->idx_line_end) ;
}
// Find the next highest adjustable feedrate among the extruders.
float feedrate_next = 0.f;
for (PerExtruderAdjustments *adj : by_min_print_speed)
if (adj->idx_line_end < adj->n_lines_adjustable && adj->lines[adj->idx_line_end].feedrate > feedrate_next)
feedrate_next = adj->lines[adj->idx_line_end].feedrate;
// Slow down, limited by max(feedrate_next, slow_down_min_speed).
for (auto adj = by_min_print_speed.begin(); adj != by_min_print_speed.end();) {
// Slow down at most by time_stretch.
if ((*adj)->slow_down_min_speed == 0.f) {
// All the adjustable speeds are now lowered to the same speed,
// and the minimum speed is set to zero.
float time_adjustable = 0.f;
for (auto it = adj; it != by_min_print_speed.end(); ++ it)
time_adjustable += (*it)->adjustable_time(true);
float rate = (time_adjustable + time_stretch) / time_adjustable;
for (auto it = adj; it != by_min_print_speed.end(); ++ it)
(*it)->slow_down_proportional(rate, true);
return;
} else {
float feedrate_limit = std::max(feedrate_next, (*adj)->slow_down_min_speed);
bool done = false;
float time_stretch_max = 0.f;
for (auto it = adj; it != by_min_print_speed.end(); ++ it)
time_stretch_max += (*it)->time_stretch_when_slowing_down_to_feedrate(feedrate_limit);
if (time_stretch_max >= time_stretch) {
feedrate_limit = new_feedrate_to_reach_time_stretch(adj, by_min_print_speed.end(), feedrate_limit, time_stretch, 20);
done = true;
} else
time_stretch -= time_stretch_max;
for (auto it = adj; it != by_min_print_speed.end(); ++ it)
(*it)->slow_down_to_feedrate(feedrate_limit);
if (done)
return;
}
// Skip the other extruders with nearly the same slow_down_min_speed, as they have been processed already.
auto next = adj;
for (++ next; next != by_min_print_speed.end() && (*next)->slow_down_min_speed > (*adj)->slow_down_min_speed - EPSILON; ++ next);
adj = next;
}
if (feedrate_next == 0.f)
// There are no other extrusions available for slow down.
break;
for (PerExtruderAdjustments *adj : by_min_print_speed) {
adj->idx_line_begin = adj->idx_line_end;
feedrate = feedrate_next;
}
}
}
// Calculate slow down for all the extruders.
float CoolingBuffer::calculate_layer_slowdown(std::vector<PerExtruderAdjustments> &per_extruder_adjustments)
{
// Sort the extruders by an increasing slow_down_layer_time.
// The layers with a lower slow_down_layer_time are slowed down
// together with all the other layers with slow_down_layer_time above.
std::vector<PerExtruderAdjustments*> by_slowdown_time;
by_slowdown_time.reserve(per_extruder_adjustments.size());
// Only insert entries, which are adjustable (have cooling enabled and non-zero stretchable time).
// Collect total print time of non-adjustable extruders.
float elapsed_time_total0 = 0.f;
for (PerExtruderAdjustments &adj : per_extruder_adjustments) {
// Curren total time for this extruder.
adj.time_total = adj.elapsed_time_total();
// Maximum time for this extruder, when all extrusion moves are slowed down to min_extrusion_speed.
adj.time_maximum = adj.maximum_time_after_slowdown(true);
if (adj.cooling_slow_down_enabled && adj.lines.size() > 0) {
by_slowdown_time.emplace_back(&adj);
// sorts the lines, also sets adj.time_non_adjustable
adj.sort_lines_by_decreasing_feedrate();
} else
elapsed_time_total0 += adj.elapsed_time_total();
}
std::sort(by_slowdown_time.begin(), by_slowdown_time.end(),
[](const PerExtruderAdjustments *adj1, const PerExtruderAdjustments *adj2)
{ return adj1->slow_down_layer_time < adj2->slow_down_layer_time; });
for (auto cur_begin = by_slowdown_time.begin(); cur_begin != by_slowdown_time.end(); ++ cur_begin) {
PerExtruderAdjustments &adj = *(*cur_begin);
// Calculate the current adjusted elapsed_time_total over the non-finalized extruders.
float total = elapsed_time_total0;
for (auto it = cur_begin; it != by_slowdown_time.end(); ++ it)
total += (*it)->time_total;
float slow_down_layer_time = adj.slow_down_layer_time * 1.001f;
if (total > slow_down_layer_time) {
// The current total time is above the minimum threshold of the rest of the extruders, don't adjust anything.
} else {
// Adjust this and all the following (higher m_config.slow_down_layer_time) extruders.
// Sum maximum slow down time as if everything was slowed down including the external perimeters.
float max_time = elapsed_time_total0;
for (auto it = cur_begin; it != by_slowdown_time.end(); ++ it)
max_time += (*it)->time_maximum;
if (max_time > slow_down_layer_time) {
extruder_range_slow_down_non_proportional(cur_begin, by_slowdown_time.end(), slow_down_layer_time - total);
} else {
// Slow down to maximum possible.
for (auto it = cur_begin; it != by_slowdown_time.end(); ++ it)
(*it)->slowdown_to_minimum_feedrate(true);
}
}
elapsed_time_total0 += adj.elapsed_time_total();
}
return elapsed_time_total0;
}
// Apply slow down over G-code lines stored in per_extruder_adjustments, enable fan if needed.
// Returns the adjusted G-code.
std::string CoolingBuffer::apply_layer_cooldown(
// Source G-code for the current layer.
const std::string &gcode,
// ID of the current layer, used to disable fan for the first n layers.
size_t layer_id,
// Total time of this layer after slow down, used to control the fan.
float layer_time,
// Per extruder list of G-code lines and their cool down attributes.
std::vector<PerExtruderAdjustments> &per_extruder_adjustments)
{
// First sort the adjustment lines by of multiple extruders by their position in the source G-code.
std::vector<const CoolingLine*> lines;
{
size_t n_lines = 0;
for (const PerExtruderAdjustments &adj : per_extruder_adjustments)
n_lines += adj.lines.size();
lines.reserve(n_lines);
for (const PerExtruderAdjustments &adj : per_extruder_adjustments)
for (const CoolingLine &line : adj.lines)
lines.emplace_back(&line);
std::sort(lines.begin(), lines.end(), [](const CoolingLine *ln1, const CoolingLine *ln2) { return ln1->line_start < ln2->line_start; } );
}
// Second generate the adjusted G-code.
std::string new_gcode;
new_gcode.reserve(gcode.size() * 2);
bool overhang_fan_control= false;
int overhang_fan_speed = 0;
bool supp_interface_fan_control= false;
int supp_interface_fan_speed = 0;
auto change_extruder_set_fan = [ this, layer_id, layer_time, &new_gcode, &overhang_fan_control, &overhang_fan_speed, &supp_interface_fan_control, &supp_interface_fan_speed](bool immediately_apply) {
#define EXTRUDER_CONFIG(OPT) m_config.OPT.get_at(m_current_extruder)
float fan_min_speed = EXTRUDER_CONFIG(fan_min_speed);
float fan_speed_new = EXTRUDER_CONFIG(reduce_fan_stop_start_freq) ? fan_min_speed : 0;
//BBS
int additional_fan_speed_new = EXTRUDER_CONFIG(additional_cooling_fan_speed);
int close_fan_the_first_x_layers = EXTRUDER_CONFIG(close_fan_the_first_x_layers);
// Is the fan speed ramp enabled?
int full_fan_speed_layer = EXTRUDER_CONFIG(full_fan_speed_layer);
supp_interface_fan_speed = EXTRUDER_CONFIG(support_material_interface_fan_speed);
if (close_fan_the_first_x_layers <= 0 && full_fan_speed_layer > 0) {
// When ramping up fan speed from close_fan_the_first_x_layers to full_fan_speed_layer, force close_fan_the_first_x_layers above zero,
// so there will be a zero fan speed at least at the 1st layer.
close_fan_the_first_x_layers = 1;
}
if (int(layer_id) >= close_fan_the_first_x_layers) {
float fan_max_speed = EXTRUDER_CONFIG(fan_max_speed);
float slow_down_layer_time = float(EXTRUDER_CONFIG(slow_down_layer_time));
float fan_cooling_layer_time = float(EXTRUDER_CONFIG(fan_cooling_layer_time));
//BBS: always enable the fan speed interpolation according to layer time
//if (EXTRUDER_CONFIG(cooling)) {
if (layer_time < slow_down_layer_time) {
// Layer time very short. Enable the fan to a full throttle.
fan_speed_new = fan_max_speed;
} else if (layer_time < fan_cooling_layer_time) {
// Layer time quite short. Enable the fan proportionally according to the current layer time.
assert(layer_time >= slow_down_layer_time);
double t = (layer_time - slow_down_layer_time) / (fan_cooling_layer_time - slow_down_layer_time);
fan_speed_new = int(floor(t * fan_min_speed + (1. - t) * fan_max_speed) + 0.5);
}
//}
overhang_fan_speed = EXTRUDER_CONFIG(overhang_fan_speed);
if (int(layer_id) >= close_fan_the_first_x_layers && int(layer_id) + 1 < full_fan_speed_layer) {
// Ramp up the fan speed from close_fan_the_first_x_layers to full_fan_speed_layer.
float factor = float(int(layer_id + 1) - close_fan_the_first_x_layers) / float(full_fan_speed_layer - close_fan_the_first_x_layers);
fan_speed_new = std::clamp(int(float(fan_speed_new) * factor + 0.5f), 0, 255);
overhang_fan_speed = std::clamp(int(float(overhang_fan_speed) * factor + 0.5f), 0, 255);
}
supp_interface_fan_speed = EXTRUDER_CONFIG(support_material_interface_fan_speed);
supp_interface_fan_control = supp_interface_fan_speed >= 0;
#undef EXTRUDER_CONFIG
overhang_fan_control= overhang_fan_speed > fan_speed_new;
} else {
overhang_fan_control= false;
overhang_fan_speed = 0;
fan_speed_new = 0;
additional_fan_speed_new = 0;
supp_interface_fan_control= false;
supp_interface_fan_speed = 0;
}
if (fan_speed_new != m_fan_speed) {
m_fan_speed = fan_speed_new;
m_current_fan_speed = fan_speed_new;
if (immediately_apply)
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, m_fan_speed);
}
//BBS
if (additional_fan_speed_new != m_additional_fan_speed) {
m_additional_fan_speed = additional_fan_speed_new;
if (immediately_apply && m_config.auxiliary_fan.value)
new_gcode += GCodeWriter::set_additional_fan(m_additional_fan_speed);
}
};
const char *pos = gcode.c_str();
int current_feedrate = 0;
change_extruder_set_fan(true);
// Orca: Reduce set fan commands by deferring the GCodeWriter::set_fan calls. Inspired by SuperSlicer
// define fan_speed_change_requests and initialize it with all possible types fan speed change requests
std::unordered_map<int, bool> fan_speed_change_requests = {{CoolingLine::TYPE_OVERHANG_FAN_START, false},
{CoolingLine::TYPE_SUPPORT_INTERFACE_FAN_START, false},
{CoolingLine::TYPE_FORCE_RESUME_FAN, false}};
bool need_set_fan = false;
for (const CoolingLine *line : lines) {
const char *line_start = gcode.c_str() + line->line_start;
const char *line_end = gcode.c_str() + line->line_end;
if (line_start > pos)
new_gcode.append(pos, line_start - pos);
if (line->type & CoolingLine::TYPE_SET_TOOL) {
unsigned int new_extruder = 0;
auto ret = std::from_chars(line_start + m_toolchange_prefix.size(), line_end, new_extruder);
if (std::errc::invalid_argument != ret.ec) {
if (new_extruder != m_current_extruder) {
m_current_extruder = new_extruder;
change_extruder_set_fan(true);
}
}
new_gcode.append(line_start, line_end - line_start);
} else if (line->type & CoolingLine::TYPE_OVERHANG_FAN_START) {
if (overhang_fan_control && !fan_speed_change_requests[CoolingLine::TYPE_OVERHANG_FAN_START]) {
need_set_fan = true;
fan_speed_change_requests[CoolingLine::TYPE_OVERHANG_FAN_START] = true;
}
} else if (line->type & CoolingLine::TYPE_OVERHANG_FAN_END) {
if (overhang_fan_control && fan_speed_change_requests[CoolingLine::TYPE_OVERHANG_FAN_START]) {
fan_speed_change_requests[CoolingLine::TYPE_OVERHANG_FAN_START] = false;
}
need_set_fan = true;
} else if (line->type & CoolingLine::TYPE_SUPPORT_INTERFACE_FAN_START) {
if (supp_interface_fan_control && !fan_speed_change_requests[CoolingLine::TYPE_SUPPORT_INTERFACE_FAN_START]) {
fan_speed_change_requests[CoolingLine::TYPE_SUPPORT_INTERFACE_FAN_START] = true;
need_set_fan = true;
}
} else if (line->type & CoolingLine::TYPE_SUPPORT_INTERFACE_FAN_END && fan_speed_change_requests[CoolingLine::TYPE_SUPPORT_INTERFACE_FAN_START]) {
if (supp_interface_fan_control) {
fan_speed_change_requests[CoolingLine::TYPE_SUPPORT_INTERFACE_FAN_START] = false;
}
need_set_fan = true;
} else if (line->type & CoolingLine::TYPE_FORCE_RESUME_FAN) {
// check if any fan speed change request is active
if (m_fan_speed != -1 && !std::any_of(fan_speed_change_requests.begin(), fan_speed_change_requests.end(), [](const std::pair<int, bool>& p) { return p.second; })){
fan_speed_change_requests[CoolingLine::TYPE_FORCE_RESUME_FAN] = true;
need_set_fan = true;
}
if (m_additional_fan_speed != -1 && m_config.auxiliary_fan.value)
new_gcode += GCodeWriter::set_additional_fan(m_additional_fan_speed);
}
else if (line->type & CoolingLine::TYPE_EXTRUDE_END) {
// Just remove this comment.
} else if (line->type & (CoolingLine::TYPE_ADJUSTABLE | CoolingLine::TYPE_EXTERNAL_PERIMETER | CoolingLine::TYPE_WIPE | CoolingLine::TYPE_HAS_F)) {
// Find the start of a comment, or roll to the end of line.
const char *end = line_start;
for (; end < line_end && *end != ';'; ++ end);
// Find the 'F' word.
const char *fpos = strstr(line_start + 2, " F") + 2;
int new_feedrate = current_feedrate;
// Modify the F word of the current G-code line.
bool modify = false;
// Remove the F word from the current G-code line.
bool remove = false;
assert(fpos != nullptr);
new_feedrate = line->slowdown ? int(floor(60. * line->feedrate + 0.5)) : atoi(fpos);
if (new_feedrate == current_feedrate) {
// No need to change the F value.
if ((line->type & (CoolingLine::TYPE_ADJUSTABLE | CoolingLine::TYPE_EXTERNAL_PERIMETER | CoolingLine::TYPE_WIPE)) || line->length == 0.)
// Feedrate does not change and this line does not move the print head. Skip the complete G-code line including the G-code comment.
end = line_end;
else
// Remove the feedrate from the G0/G1 line. The G-code line may become empty!
remove = true;
} else if (line->slowdown) {
// The F value will be overwritten.
modify = true;
} else {
// The F value is different from current_feedrate, but not slowed down, thus the G-code line will not be modified.
// Emit the line without the comment.
new_gcode.append(line_start, end - line_start);
current_feedrate = new_feedrate;
}
if (modify || remove) {
if (modify) {
// Replace the feedrate.
new_gcode.append(line_start, fpos - line_start);
current_feedrate = new_feedrate;
char buf[64];
sprintf(buf, "%d", int(current_feedrate));
new_gcode += buf;
} else {
// Remove the feedrate word.
const char *f = fpos;
// Roll the pointer before the 'F' word.
for (f -= 2; f > line_start && (*f == ' ' || *f == '\t'); -- f);
if ((f - line_start == 1) && *line_start == 'G' && (*f == '1' || *f == '0')) {
// BBS: only remain "G1" or "G0" of this line after remove 'F' part, don't save
} else {
// Append up to the F word, without the trailing whitespace.
new_gcode.append(line_start, f - line_start + 1);
}
}
// Skip the non-whitespaces of the F parameter up the comment or end of line.
for (; fpos != end && *fpos != ' ' && *fpos != ';' && *fpos != '\n'; ++ fpos);
// Append the rest of the line without the comment.
if (fpos < end)
// The G-code line is not empty yet. Emit the rest of it.
new_gcode.append(fpos, end - fpos);
else if (remove && new_gcode == "G1") {
// The G-code line only contained the F word, now it is empty. Remove it completely including the comments.
new_gcode.resize(new_gcode.size() - 2);
end = line_end;
}
}
// Process the rest of the line.
if (end < line_end) {
if (line->type & (CoolingLine::TYPE_ADJUSTABLE | CoolingLine::TYPE_EXTERNAL_PERIMETER | CoolingLine::TYPE_WIPE)) {
// Process comments, remove ";_EXTRUDE_SET_SPEED", ";_EXTERNAL_PERIMETER", ";_WIPE"
std::string comment(end, line_end);
boost::replace_all(comment, ";_EXTRUDE_SET_SPEED", "");
if (line->type & CoolingLine::TYPE_EXTERNAL_PERIMETER)
boost::replace_all(comment, ";_EXTERNAL_PERIMETER", "");
if (line->type & CoolingLine::TYPE_WIPE)
boost::replace_all(comment, ";_WIPE", "");
new_gcode += comment;
} else {
// Just attach the rest of the source line.
new_gcode.append(end, line_end - end);
}
}
} else {
new_gcode.append(line_start, line_end - line_start);
}
if (need_set_fan) {
if (fan_speed_change_requests[CoolingLine::TYPE_OVERHANG_FAN_START]){
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, overhang_fan_speed);
m_current_fan_speed = overhang_fan_speed;
}
else if (fan_speed_change_requests[CoolingLine::TYPE_SUPPORT_INTERFACE_FAN_START]){
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, supp_interface_fan_speed);
m_current_fan_speed = supp_interface_fan_speed;
}
else if(fan_speed_change_requests[CoolingLine::TYPE_FORCE_RESUME_FAN] && m_current_fan_speed != -1){
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, m_current_fan_speed);
fan_speed_change_requests[CoolingLine::TYPE_FORCE_RESUME_FAN] = false;
}
else
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, m_fan_speed);
need_set_fan = false;
}
pos = line_end;
}
const char *gcode_end = gcode.c_str() + gcode.size();
if (pos < gcode_end)
new_gcode.append(pos, gcode_end - pos);
return new_gcode;
}
} // namespace Slic3r
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