IsSonic
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| Flag: | IsSonic |
| File(s): | Rules(md).ini |
| Values: | boolean |
| Default: | no |
| Applicable to: | Weapons |
If set, the game will draw a colored wave along the projectile path (It is used for the Disruptor in TS and the Dolphin in RA2). In TS, the wave is continuous, in RA2, it is not. In YR, IsMagBeam=yes provides a similar effect, but it is drawn in the reverse direction (from the target towards the firing unit) when attacking VehicleTypes.
Note: if the projectile is invisible, then the warhead will detonate when the wave hits the target. If it is visible, this wave will be only a graphic effect, and the warhead will detonate when the visible projectile hits. However, AI units will "sense" the wave and try to scatter before the projectile hits.
Damage calculation
As noted by some community members in the past, IsSonic deals more damage to closer units than to units that are further away. The reason for this lies (logically), in the way IsSonic works and applies its damage: A sonic wave exists for precisely 20 frames, regardless of how far it has to travel. On each of these frames, it will damage all targets it has passed up to that frame. This, in turn, means a target that is closer to the shooter, and is hit early in the life cycle of the wave, takes considerably more damage, simply because it is longer under the influence of the wave, and damage is applied to it more often.
Example
Let us assume there are three targets to be hit by a sonic wave.
One will be reached after 5 frames, one after 10, and one after 15 frames.
The table below illustrates how damage would be applied to them, and makes very obvious why closer targets take so much more damage than those further away:
| Frame | Target 1 | Target 2 | Target 3 |
|---|---|---|---|
| 1 | no damage | no damage | no damage |
| 2 | no damage | no damage | no damage |
| 3 | no damage | no damage | no damage |
| 4 | no damage | no damage | no damage |
| 5 | no damage | no damage | no damage |
| 6 | damage | no damage | no damage |
| 7 | damage | no damage | no damage |
| 8 | damage | no damage | no damage |
| 9 | damage | no damage | no damage |
| 10 | damage | no damage | no damage |
| 11 | damage | damage | no damage |
| 12 | damage | damage | no damage |
| 13 | damage | damage | no damage |
| 14 | damage | damage | no damage |
| 15 | damage | damage | no damage |
| 16 | damage | damage | damage |
| 17 | damage | damage | damage |
| 18 | damage | damage | damage |
| 19 | damage | damage | damage |
| 20 | damage | damage | damage |