Move Volumetric methods to Planner

Marlin/src/module/planner.cpp

@@ -105,6 +105,10 @@ float Planner::max_feedrate_mm_s[XYZE_N], // Max speeds in mm per second
 
 int16_t Planner::flow_percentage[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(100); // Extrusion factor for each extruder
 
+// Initialized by settings.load()
+float Planner::filament_size[EXTRUDERS],         // As a baseline for the multiplier, filament diameter
+      Planner::volumetric_multiplier[EXTRUDERS]; // May be auto-adjusted by a filament width sensor
+
 uint32_t Planner::max_acceleration_steps_per_s2[XYZE_N],
          Planner::max_acceleration_mm_per_s2[XYZE_N]; // Use M201 to override by software
 
@@ -539,6 +543,16 @@ void Planner::check_axes_activity() {
   #endif
 }
 
+inline float calculate_volumetric_multiplier(const float &diameter) {
+  if (!parser.volumetric_enabled || diameter == 0) return 1.0;
+  return 1.0 / CIRCLE_AREA(diameter * 0.5);
+}
+
+void Planner::calculate_volumetric_multipliers() {
+  for (uint8_t i = 0; i < COUNT(filament_size); i++)
+    volumetric_multiplier[i] = calculate_volumetric_multiplier(filament_size[i]);
+}
+
 #if PLANNER_LEVELING
   /**
    * lx, ly, lz - logical (cartesian, not delta) positions in mm