How to rotate a vector?
Posted: Wed Mar 08, 2017 1:26 am
While modding a map for MH I run into the task to create a pinball ball that is just flying (linear) around in a walled area, being reflected at walls and damaging players if that ball hits him. To give the trajectory a bit randomness I'd like to change the direction (but not the length) of the resulting velocity vector after a wall hit. For now I've been using this, but I'm sure there is an easier way:
Code: Select all
var(Movement) int BounceVariance;
simulated function float VaryValue(float Value, int Vary) {
return (1 - 2 * fRand()) * Vary + Value;
}
simulated function HitWall(vector HitNormal, actor Wall) {
local rotator r;
[... code of Mover(Wall).bDamageTriggered left out ...]
if (BounceVariance != 0)
{
r = rotator(HitNormal);
r.yaw = VaryValue(r.yaw, BounceVariance);
r.pitch = VaryValue(r.pitch, BounceVariance);
r.roll = VaryValue(r.roll, BounceVariance);
HitNormal = Normal(vector(r));
}
Velocity = MirrorVectorByNormal(Velocity, HitNormal);
}