Optimize g-code generation for Klipper: combine accel and jerk command

.github/workflows/build_orca.yml

@@ -155,6 +155,7 @@ jobs:
       - name: Install nsis
         if: matrix.os == 'windows-latest'
         run: |
+          dir "C:/Program Files (x86)/Windows Kits/10/Include"
           choco install nsis
 
       - name: download deps

src/libslic3r/GCode.cpp

@@ -3457,6 +3457,7 @@ LayerResult GCode::process_layer(
 
     //BBS
     if (first_layer) {
+        // Orca: we don't need to optimize the Klipper as only set once
         if (m_config.default_acceleration.value > 0 && m_config.initial_layer_acceleration.value > 0) {
             gcode += m_writer.set_print_acceleration((unsigned int)floor(m_config.initial_layer_acceleration.value + 0.5));
         }
@@ -3483,9 +3484,10 @@ LayerResult GCode::process_layer(
           gcode += this->unretract();
         }
       }
-      // BBS:  reset acceleration at sencond layer
+      // Reset acceleration at sencond layer
+      // Orca: only set once, don't need to call set_accel_and_jerk
       if (m_config.default_acceleration.value > 0 && m_config.initial_layer_acceleration.value > 0) {
-        gcode += m_writer.set_print_acceleration((unsigned int)floor(m_config.default_acceleration.value + 0.5));
+        gcode += m_writer.set_print_acceleration((unsigned int) floor(m_config.default_acceleration.value + 0.5));
       }
 
       if (m_config.default_jerk.value > 0 && m_config.initial_layer_jerk.value > 0) {
@@ -4501,6 +4503,10 @@ std::string GCode::_extrude(const ExtrusionPath &path, std::string description,
     // compensate retraction
     gcode += this->unretract();
     m_config.apply(m_calib_config);
+
+    // Orca: optimize for Klipper, set acceleration and jerk in one command
+    unsigned int acceleration_i = 0;
+    double jerk = 0;
     // adjust acceleration
     if (m_config.default_acceleration.value > 0) {
         double acceleration;
@@ -4525,12 +4531,11 @@ std::string GCode::_extrude(const ExtrusionPath &path, std::string description,
         } else {
             acceleration = m_config.default_acceleration.value;
         }
-        gcode += m_writer.set_print_acceleration((unsigned int)floor(acceleration + 0.5));
+        acceleration_i = (unsigned int)floor(acceleration + 0.5);
     }
 
     // adjust X Y jerk
     if (m_config.default_jerk.value > 0) {
-        double jerk;
         if (this->on_first_layer() && m_config.initial_layer_jerk.value > 0) {
             jerk = m_config.initial_layer_jerk.value;
         } else if (m_config.outer_wall_jerk.value > 0 && is_external_perimeter(path.role())) {
@@ -4545,6 +4550,13 @@ std::string GCode::_extrude(const ExtrusionPath &path, std::string description,
         else {
             jerk = m_config.default_jerk.value;
         }
+    }
+
+    if (m_writer.get_gcode_flavor() == gcfKlipper) {
+        gcode += m_writer.set_accel_and_jerk(acceleration_i, jerk);
+
+    } else {
+        gcode += m_writer.set_print_acceleration(acceleration_i);
         gcode += m_writer.set_jerk_xy(jerk);
     }
 
@@ -5017,23 +5029,31 @@ std::string GCode::travel_to(const Point &point, ExtrusionRole role, std::string
     const bool used_external_mp_once  = m_avoid_crossing_perimeters.used_external_mp_once();
     std::string gcode;
 
-    // SoftFever
+    // Orca: we don't need to optimize the Klipper as only set once
+    double jerk_to_set = 0.0;
+    unsigned int acceleration_to_set = 0;
     if (this->on_first_layer()) {
         if (m_config.default_acceleration.value > 0 && m_config.initial_layer_acceleration.value > 0) {
-            gcode += m_writer.set_travel_acceleration((unsigned int)floor(m_config.initial_layer_acceleration.value + 0.5));
+            acceleration_to_set = (unsigned int) floor(m_config.initial_layer_acceleration.value + 0.5);
         }
         if (m_config.default_jerk.value > 0 && m_config.initial_layer_jerk.value > 0) {
-            gcode += m_writer.set_jerk_xy(m_config.initial_layer_jerk.value);
+            jerk_to_set = m_config.initial_layer_jerk.value;
         }
     } else {
         if (m_config.default_acceleration.value > 0 && m_config.travel_acceleration.value > 0) {
-            gcode += m_writer.set_travel_acceleration((unsigned int)floor(m_config.travel_acceleration.value + 0.5));
+            acceleration_to_set = (unsigned int) floor(m_config.travel_acceleration.value + 0.5);
         }
-
         if (m_config.default_jerk.value > 0 && m_config.travel_jerk.value > 0) {
-            gcode += m_writer.set_jerk_xy(m_config.travel_jerk.value);
+            jerk_to_set = m_config.travel_jerk.value;
         }
     }
+    if (m_writer.get_gcode_flavor() == gcfKlipper) {
+        gcode += m_writer.set_accel_and_jerk(acceleration_to_set, jerk_to_set);
+    } else {
+        gcode += m_writer.set_travel_acceleration(acceleration_to_set);
+        gcode += m_writer.set_jerk_xy(jerk_to_set);
+    }
+
     // if a retraction would be needed, try to use reduce_crossing_wall to plan a
     // multi-hop travel path inside the configuration space
     if (needs_retraction

src/libslic3r/GCodeWriter.cpp

@@ -248,6 +248,48 @@ std::string GCodeWriter::set_jerk_xy(double jerk)
 
 }
 
+std::string GCodeWriter::set_accel_and_jerk(unsigned int acceleration, double jerk)
+{
+    // Only Klipper supports setting acceleration and jerk at the same time. Throw an error if we try to do this on other flavours.
+    if(FLAVOR_IS_NOT(gcfKlipper))
+        throw std::runtime_error("set_accel_and_jerk() is only supported by Klipper");
+
+    // Clamp the acceleration to the allowed maximum.
+    if (m_max_acceleration > 0 && acceleration > m_max_acceleration)
+        acceleration = m_max_acceleration;
+    
+    bool is_empty = true;
+    std::ostringstream gcode;
+    gcode << "SET_VELOCITY_LIMIT";
+    if (acceleration != 0 && acceleration != m_last_acceleration) {
+        gcode << " ACCEL=" << acceleration;
+        if (this->config.accel_to_decel_enable) {
+            gcode << " ACCEL_TO_DECEL=" << acceleration * this->config.accel_to_decel_factor / 100;
+        }
+        m_last_acceleration = acceleration;
+        is_empty = false;
+    }
+    // Clamp the jerk to the allowed maximum.
+    if (m_max_jerk > 0 && jerk > m_max_jerk)
+        jerk = m_max_jerk;
+
+    if (jerk > 0.01 && !is_approx(jerk, m_last_jerk)) {
+        gcode << " SQUARE_CORNER_VELOCITY=" << jerk;
+        m_last_jerk = jerk;
+        is_empty = false;
+    }
+
+    if(is_empty)
+        return std::string();
+
+    if (GCodeWriter::full_gcode_comment)
+        gcode << " ; adjust VELOCITY_LIMIT(accel/jerk)";
+    gcode << "\n";
+
+    return gcode.str();
+
+}
+
 std::string GCodeWriter::set_pressure_advance(double pa) const
 {
     std::ostringstream gcode;

src/libslic3r/GCodeWriter.hpp

@@ -49,6 +49,8 @@ public:
     std::string set_print_acceleration(unsigned int acceleration)   { return set_acceleration_internal(Acceleration::Print, acceleration); }
     std::string set_travel_acceleration(unsigned int acceleration)  { return set_acceleration_internal(Acceleration::Travel, acceleration); }
     std::string set_jerk_xy(double jerk);
+    // Orca: set acceleration and jerk in one command for Klipper
+    std::string set_accel_and_jerk(unsigned int acceleration, double jerk);
     std::string set_pressure_advance(double pa) const;
     std::string reset_e(bool force = false);
     std::string update_progress(unsigned int num, unsigned int tot, bool allow_100 = false) const;
@@ -112,6 +114,7 @@ public:
     void set_is_bbl_machine(bool bval) {m_is_bbl_printers = bval;}
     const bool is_bbl_printers() const {return m_is_bbl_printers;}
     void set_is_first_layer(bool bval) { m_is_first_layer = bval; }
+    GCodeFlavor get_gcode_flavor() const { return config.gcode_flavor; }
 
   private:
 	// Extruders are sorted by their ID, so that binary search is possible.