add top two weapon comparison based on ratio

bin/mhdamage.py

@@ -186,6 +186,9 @@ def parse_args(argv):
     parser.add_argument("-p", "--parts",
                         help="Limit analysis to specified parts"
                             +" (comma separated list)")
+    parser.add_argument("-o", "--motion", type=int,
+                        help="Use specified motion value instead of weapon "
+                            +"average")
     parser.add_argument("-l", "--phial",
                         help="Show CB phial damage at the sepcified level"
                             +" (1, 2, 3, 5=ultra) instead of normal motion"
@@ -290,6 +293,24 @@ def print_sorted_damage(names, damage_map_base, weapon_damage_map, parts):
             print "% 2d" % part_damage.average(),
         print
 
+    if len(names) > 1:
+        w1 = weapon_damage_map[names_sorted[0]]
+        w2 = weapon_damage_map[names_sorted[1]]
+        m, ratio = w1.compare_break_even(w2)
+        print
+        print "Comparison of '%s' and '%s'" % (
+            names_sorted[0], names_sorted[1])
+        print "Hitbox ratio:", m, "%0.2f" % ratio
+
+        for line in w1.get_raw_element_ratios():
+            line = list(line)
+            if m*line[3] > m*ratio:
+                line.append(names_sorted[0])
+            else:
+                line.append(names_sorted[1])
+            # (part, raw, element, ratio)
+            print "%-22s   %02d  %02d  %0.2f  %s" % tuple(line)
+
 
 def print_damage_percent_diff(names, damage_map_base, weapon_damage_map, parts):
     for part in parts:
@@ -432,6 +453,9 @@ def main():
     motion = motiondb[weapon_type].average
     print "Weapon Type: %s" % weapon_type
     print "Average Motion: %0.1f" % motion
+    if args.motion:
+        motion = args.motion
+        print "Specified Motion: %0.1f" % motion
     print "Monster Breaks: %s" % ", ".join(monster_breaks)
     skill_names = get_skill_names(args)
     print "Common Skills:", ", ".join(skill for skill in skill_names if skill)

mhapi/damage.py

@@ -21,11 +21,19 @@ def raw_damage(true_raw, sharpness, affinity, monster_hitbox, motion):
     Calculate raw damage to a monster part with the given true raw,
     sharpness, monster raw weakness, and weapon motion value.
     """
-    return floor(true_raw
+    return floor(raw_damage_nohitbox(true_raw, sharpness, affinity, motion)
+                 * monster_hitbox / 100.0)
+
+
+def raw_damage_nohitbox(true_raw, sharpness, affinity, motion):
+    """
+    Calculate raw damage to a monster part with the given true raw,
+    sharpness, monster raw weakness, and weapon motion value.
+    """
+    return (true_raw
             * SharpnessLevel.raw_modifier(sharpness)
             * (1 + (affinity / 400.0))
-                 * motion / 100.0
-                 * monster_hitbox / 100.0)
+            * motion / 100.0)
 
 
 def element_damage(raw_element, sharpness, monster_ehitbox):
@@ -34,11 +42,19 @@ def element_damage(raw_element, sharpness, monster_ehitbox):
     attack, the given sharpness, and the given monster elemental weakness.
     Note that this is independent of the motion value of the attack.
     """
-    return floor(raw_element
-                 * SharpnessLevel.element_modifier(sharpness)
+    return floor(element_damage_nohitbox(raw_element, sharpness)
                  * monster_ehitbox / 100.0)
 
 
+def element_damage_nohitbox(raw_element, sharpness):
+    """
+    Calculate elemental damage to a monster part with the given elemental
+    attack, the given sharpness, and the given monster elemental weakness.
+    Note that this is independent of the motion value of the attack.
+    """
+    return (raw_element * SharpnessLevel.element_modifier(sharpness))
+
+
 class MotionType(object):
     CUT = "cut"
     IMPACT = "impact"
@@ -506,6 +522,52 @@ class WeaponMonsterDamage(object):
                 average += damage.total
         return average / self.break_count
 
+    def compare_break_even(self, other_wd, motion=None):
+        """
+        Compare with another weapon damage, to determine the break even
+        point of the raw/element hitbox. Assumes same element.
+
+        Returns (m, ratio), where ratio is the break even for the ratio of
+        raw hitbox to element hitbox. If m is 1, then self is better
+        when the ratio is larger (favors raw). If m is -1, then self is
+        better when the ratio is smaller (favors element).
+        """
+        r1, e1 = self.nohitbox_damage(motion)
+        r2, e2 = other_wd.nohitbox_damage(motion)
+        #print r1, e1
+        #print r2, e2
+        rdiff = r1 - r2
+        ediff = e2 - e1
+        m = 1
+        if rdiff < 0:
+            m = -1
+        return m, (float(ediff) / rdiff)
+
+    def get_raw_element_ratios(self):
+        # TODO: better MIXED handling
+        if self.damage_type in (WeaponType.CUT, WeaponType.MIXED):
+            raw_type = "cut"
+        else:
+            raw_type = "impact"
+        hitboxes = []
+        for row in self.monster_damage._rows:
+            part = row["body_part"]
+            hitbox = int(row[raw_type])
+            ehitbox = int(row[str(self.etype.lower())])
+            hitboxes.append((part, hitbox, ehitbox, float(hitbox) / ehitbox))
+        return hitboxes
+
+    def nohitbox_damage(self, motion=None):
+        """
+        Note: uses first element only, so not good for dual element DB.
+        """
+        if motion is None:
+            motion = self.motion
+        raw = raw_damage_nohitbox(self.true_raw, self.sharpness,
+                                  self.affinity, motion)
+        element = element_damage_nohitbox(self.eattack, self.sharpness)
+        return (raw, element)
+
     def __getitem__(self, key):
         return self.damage_map[key]