Titan Quest – Quick Guide to Projectiles

How Projectiles Are Behaving

In this guide we explain how projectiles are behaving and how the projectile speed work.

A projectile is another game object, it’s a mesh moving in space and it has the following specifications, for our case:

• Velocity
• Distancelimit
• Hitlifetime
• Misslifetime

An entity has a projectile speed which is actually a modifier:

• Projectilespeed

All units are guessed because there is no indication on what they are in the files, however the standard in video games is to use SI, so meters and seconds in our case.

The formulas to calculate the distance travelled are the following.

// Hit
Distance = (velocity * projectileSpeed) * HitLifetime

// Miss
Distance = (velocity * projectileSpeed) * MissLifetime

However, the game specifies a distance limit, so if the projectile distance is greater than the distanceLimit it will stop at the distanceLimit otherwise at distance. What passing through enemies means, is that the projectile is not stopped and use the MissLifetime instead of HitLifetime once it hits.

Example

I’ll use the default arrow.

Velocity        20 m/s
DistanceLimit   19 m
HitLifetime     2 s
MissLifetime    12 s

Distance = (velocity * projectileSpeed) * MissLifetime
120m = (20* 0.5) * 12 // If your `projectileSpeed` is 50%
240m = (20* 1.0) * 12 // If your `projectileSpeed` is 100%
360m = (20* 1.5) * 12 // If your `projectileSpeed` is 150%
480m = (20* 2.0) * 12 // If your `projectileSpeed` is 200%

I hope this was helpful to you!