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There will be times where you will see a character reacting to, or sometimes outright dodging various projectiles, such as arrows, bullets, and even something much, much faster. Thus, in order to calculate how fast one must move in order to dodge incoming projectiles, there are a couple of things you must know beforehand.

  • What is the speed of said projectile?
  • How far was the projectile away from the person before he/she dodged said projectile?
  • How much distance did he/she cover when the projectile was dodged?

OR

  • How much distance did he/she cover when the projectile was deflected?

Speed of Various Projectiles

Credit to Numbersguy for the idea

Angsizing

  • Angsizing may be involved in some of the steps.
  • Angsizing equation = 2atan(tan(35deg)*(object size in pixels/panel height in pixels)). This lets you find the field of view of angle for an object in the panel, which is in degrees.
  • Angsize Calculator = Plug your angle and size of object shown in this calculator, and you will get the distance.

You can read more about it here

Steps to Calculate Speed

STEP 1. Find the distance the bullet covered.

STEP 2. Find the distance the character covered.

STEP 3. Find the ratio between the distance the character covered and the bullet covered. Multiply this ratio by the speed of bullet.

The formula is:

  • (Distance the character moved in meters) x (Speed of projectile in meters/s) / (Distance the projectile was away from the character when he/she started to move in meters)

This will get you the speed of character in meters/s

Note. Keep in mind that if said character was shown to move BEFORE the bullet was fired, this would be classified as Aim Dodging, and thus, would not be a valid reaction feat for said character.

Examples

1: Standard Dodging Feat 1

A standard rifle is fired, with the muzzle velocity of the bullet said to be 370m/s. Character B notices the bullet when the bullet is 32m away, and quickly dives to the right to dodge it. Character B lunged about 5.2m to the size; at the same time, the bullet had pierced the ground. Find the speed of Character B.

  • STEP 1: Find the distance the bullet covered. In this example, the bullet had traveled 32m before it pierced the ground, thus the bullet covered 32m in distance.
  • STEP 2: Find the distance said character covered. Here, the "Character B" moved 5.2m by the time the bullet managed to pierce the ground.
  • STEP 3: Find the ratio of distance covered between the character and the bullet. So, we do...
    • (Distance the character moved = 5.2m) x (Speed of projectile = 370m/s) / (Distance the projectile was away from the character = 32m)) = 60.13m/s; Subsonic

2: Standard Dodging Feat 2

A ranger on a dirt road notices that there is a tank turned backwards in front of him. In the screen, the height of the panel was shown to be 800px high, and the width of the tank to be 246px wide. The tank was shown to be about 6 meters in width/size. We are in the ranger's point of view, seeing the tank directly in front of him.

As soon as the tank fires the ranger dashes; only a tenth of a second had passed after the bullet was fired when the ranger immediately dashes ahead of the tank, catches the ammo and stops it in its tracks. Find the speed of the ranger. The velocity of the tank round is 1750m/s in this case.

  • STEP 1: Find the distance between the tank and the ranger. Using the angsizing equation 2atan(tan(35deg)*(246px/800px)), you get an angle of 24.3 degrees. Plug the angle as well as the size of tank into the angsize calculator, and you get a distance of 13.934m.
  • STEP 2: Find the timeframe. In this case, only 1/50th of a second had passed in this case, thus we have a timeframe of 0.1 seconds.
  • STEP 3: Find the distance the tank round covered in the given timeframe. In this case, the velocity of the tank round is 1750m/s, and the timeframe is 1/50th of a second. Since Distance = Velocity x Time, Distance = (1750m/s) x (0.02 s), which turns out to be 35m.
  • STEP 4: Find the ratio between the distance the character covered and the bullet covered. Multiply this ratio by the speed of bullet. So, we do...
    • (Distance the character moved = 13.934+35 m) x (Speed of projectile = 1750m/s) / (Distance the projectile was away from the tank = 35m)) = 2446.7 m/s; Hypersonic

Common Debunk: Aim Dodging

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Spider-Man's precognition allows him to avoid projectiles and lasers much swifter than he is generally portrayed to be.

Aim Dodging refers to the technique of avoiding linear attacks by re-positioning oneself away from the path of the attack before it is fired.

This technique is widely seen in fiction, and allows a lot of characters to dodge attacks/projectiles much faster than their own reactions (like bullets or lasers/beams), even if not explicitly stated as such.

Taking these instances as actual reaction feats might cause conflicts with the speeds and reactions generally displayed by characters. By default, as long as the character can see the source of the attack/projectile (for example, a character having line of sight on a soldier pointing a gun at them), the feat will be considered aim dodging unless one or more of the following conditions are fulfilled:

  1. The attack/projectile's path is non-linear and/or unpredictable in such a way that it makes aim dodging by perception impossible. For example, an attack that follows a random path or bends its path in the air. However, previous knowledge of the attack/projectile's pattern will count as aim dodging unless sufficient proof to the contrary can be presented, as the attack could be dodged via prior knowledge instead of reaction. Precognition, future sight, or any ability or skill that help the character predict the attack's path beforehand in any form are also considered as "prior knowledge".
  2. The character is clearly and explicitly shown to move after the attack/projectile is in motion, depicting quite clearly that the character is reacting to the attack/projectile itself and not its source. For example, a character who is shot at, moving the body after the bullet has left the gun, to dodge it. Just having the attack/projectile be shown in motion simultaneously with the dodge or the attack/projectile be shown in motion with the dodger off panel is not enough. The projectile must be shown in motion with the dodger in the same panel and the dodge coming afterwards. These two feats would not be allowed, but these two would.

Discussions

Discussion threads involving Projectile Dodging Feats
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