Use some accel/jerk settings as Method Bead Mode values

Populate Method series .makerbot files' meta.json with accel override settings,
for the print globally and for 'bead modes' pertaining to specific features,
per extruder. Currently, extruder-specific bead mode settings will only be
added to the meta.json if the value is non-zero.

Also disallow setting per mesh/extruder/meshgroup for accel/jerk _enabled,
_print, _travel, _travel_enabled for method-based printers

plugins/MakerbotWriter/MakerbotWriter.py

@@ -254,6 +254,75 @@ def _getMeta(self, root_nodes: List[SceneNode]) -> Tuple[Dict[str, any], str]:
             "printMode": CuraApplication.getInstance().getIntentManager().currentIntentCategory,
         }
 
+        if file_format == "application/x-makerbot":
+            accel_overrides = meta["accel_overrides"] = {}
+            bead_mode_overrides = accel_overrides["bead_mode"] = {}
+
+            if global_stack.getProperty('acceleration_enabled', 'value'):
+                global_accel_setting = global_stack.getProperty('acceleration_print', 'value')
+                accel_overrides["rate_mm_per_s_sq"] = {
+                    "x": global_accel_setting,
+                    "y": global_accel_setting
+                }
+            if global_stack.getProperty('acceleration_travel_enabled', 'value'):
+                travel_accel_setting = global_stack.getProperty('acceleration_travel', 'value')
+                bead_mode_overrides['Travel Move'] = {
+                    "rate_mm_per_s_sq": {
+                        "x": travel_accel_setting,
+                        "y": travel_accel_setting
+                    }
+                }
+
+            if global_stack.getProperty('jerk_enabled', 'value'):
+                global_jerk_setting = global_stack.getProperty('jerk_print', 'value')
+                accel_overrides["max_speed_change_mm_per_s"] = {
+                    "x": global_jerk_setting,
+                    "y": global_jerk_setting
+                }
+            if global_stack.getProperty('jerk_travel_enabled', 'value'):
+                travel_jerk_setting = global_stack.getProperty('jerk_travel', 'value')
+                if 'Travel Move' not in bead_mode_overrides:
+                    bead_mode_overrides['Travel Move' ] = {}
+                bead_mode_overrides['Travel Move'].update({
+                    "max_speed_change_mm_per_s": {
+                        "x": travel_jerk_setting,
+                        "y": travel_jerk_setting
+                    }
+                })
+
+
+            # Get bead mode settings per extruder
+            available_bead_modes = {
+                "infill": "FILL",
+                "prime_tower": "PRIME_TOWER",
+                "roofing": "TOP_SURFACE",
+                "support_infill": "SUPPORT",
+                "support_interface": "SUPPORT_INTERFACE",
+                "wall_0": "WALL_OUTER",
+                "wall_x": "WALL_INNER",
+                "skirt_brim": "SKIRT"
+            }
+            for idx, extruder in enumerate(extruders):
+                for bead_mode_setting, bead_mode_tag in available_bead_modes.items():
+                    if bead_mode_tag == "":
+                        continue
+                    ext_specific_tag = "%s_%s" % (bead_mode_tag, idx)
+                    accel_val = extruder.getProperty('acceleration_%s' % bead_mode_setting, 'value')
+                    jerk_val = extruder.getProperty('jerk_%s' % bead_mode_setting, 'value')
+                    if accel_val != 0 or jerk_val != 0:
+                        bead_mode_overrides[ext_specific_tag] = {}
+
+                    if accel_val != 0:
+                        bead_mode_overrides[ext_specific_tag]["rate_mm_per_s_sq"] = {
+                            "x": accel_val,
+                            "y": accel_val
+                        }
+                    if jerk_val != 0:
+                        bead_mode_overrides[ext_specific_tag][ "max_speed_change_mm_per_s"] = {
+                            "x": jerk_val,
+                            "y": jerk_val
+                        }
+
         meta["miracle_config"] = {"gaggles": {"instance0": {}}}
 
         version_info = dict()