# Classes:InterpolationPoint

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Interpolation point
Actor type Script thing Game (ZDoom)
DoomEd Number 9070 Class Name InterpolationPoint

Classes: InterpolationPoint

Interpolation points define a path to follow. They operate similarly to the patrol points of a monster patrol route.

### Arguments

Interpolation points take five arguments:

• args[0] → pitch of camera in degrees, equal to the angle subtracted from 256.
• args[1] → time (in octics) to travel to next node.
• args[2] → time (in octics) to stop at this node before continuing
• args[3] → low byte of tid of next InterpolationPoint in the path.
• args[4] → high byte of tid of next InterpolationPoint in the path.

args[3] has the low byte, and args[4] has the high byte, so the tid is args[3]+(args[4]*256). This lets you use more than 255 points for all paths. For example, if the next point had a tid of 4 then the low byte is 4 and the high byte is 0. But if the next point has a tid of 3027, the low byte is 211 and the high byte is 11 (11×256 + 211 = 3027).

Since an interpolation point needs parameters to work, it cannot have a thing special. To have a thing special executed when an interpolation point is used by one of the moving objects (ActorMover, MovingCamera or PathFollower), you need to create a an interpolation special with the same TID as the interpolation point.

#### DECORATE definition

```ACTOR InterpolationPoint native
{
+NOBLOCKMAP
+NOGRAVITY
+DONTSPLASH
RenderStyle None
}
```