Fix

MarlinKimbra/Marlin_main.cpp

@@ -6382,33 +6382,13 @@ bool setTargetedHotend(int code)
 }
 
 
-float calculate_volumetric_multiplier(float diameter) 
-{
-  float area = .0;
-  float radius = .0;
-
-  radius = diameter * .5;
-  if (! volumetric_enabled || radius == 0)
-  {
-    area = 1;
-  }
-  else
-  {
-    area = M_PI * pow(radius, 2);
-  }
-  return 1.0 / area;
+float calculate_volumetric_multiplier(float diameter) {
+  if (!volumetric_enabled || diameter == 0) return 1.0;
+  float d2 = diameter * 0.5;
+  return 1.0 / (M_PI * d2 * d2);
 }
 
-void calculate_volumetric_multipliers()
-{
-  volumetric_multiplier[0] = calculate_volumetric_multiplier(filament_size[0]);
-  #if EXTRUDERS > 1
-    volumetric_multiplier[1] = calculate_volumetric_multiplier(filament_size[1]);
-    #if EXTRUDERS > 2
-      volumetric_multiplier[2] = calculate_volumetric_multiplier(filament_size[2]);
-      #if EXTRUDERS > 3
-        volumetric_multiplier[3] = calculate_volumetric_multiplier(filament_size[3]);
-      #endif //EXTRUDERS > 3
-    #endif //EXTRUDERS > 2
-  #endif //EXTRUDERS > 1
+void calculate_volumetric_multipliers() {
+  for (int i=0; i<EXTRUDERS; i++)
+    volumetric_multiplier[i] = calculate_volumetric_multiplier(filament_size[i]);
 }