To revise top missile/munition speed for disco

[dd84ai]

Aingar, King of FLServer — Today at 1:11 PM
@darkwind the Dark Duck Since we introduced 'top speed' mechanic for missiles, you may want to revise those stats in DarkStat.

[Munition] ini block can contain an optional top_speed = float variable. It caps out the speed that a missile can reach.

This obviously changes the calculations for the max range, so you'll need to adjust those. That said, from what I can tell you simply pick muzzle_velocity, multiply by lifetime and end it there, ignoring the missile's motor.

This is the cpp code I use to calculate a missile's actual range including the top speed limit and it's motor:

string GetRangeAtSpeed(const Archetype::MotorData* motor, Archetype::Munition* munition, float muzzleVelocity, float shipVelocity)
{
    map<uint, float>::iterator topSpeedIter = munitionTopSpeedMap.find(munition->iArchID);

    float startSpeed = muzzleVelocity + shipVelocity;

    float baseDistance = munition->fLifeTime * startSpeed;

    float motorLifetime = min(motor->motorLifetime, munition->fLifeTime - motor->motorDelay);
    if (topSpeedIter != munitionTopSpeedMap.end())
    {
        motorLifetime = min(motorLifetime, max(0.0f, topSpeedIter->second - startSpeed) / motor->motorAcceleration);
    }

    float motorAcceleration = motor->motorAcceleration * motorLifetime;

    float motorDistance = motorAcceleration * motorLifetime * 0.5f;

    float timeMaxSpeed = max(0.0f, munition->fLifeTime - motor->motorDelay - motorLifetime);
    float maxspeedDistance = motorAcceleration * timeMaxSpeed;
    
    float totalDistance = baseDistance + motorDistance + maxspeedDistance;

    char buf[10];
    sprintf(buf, "%0.0fm", totalDistance);
    return string(buf);
}