private double CalculateDistanceToBullet(BulletWave ew)
{
var traveledDistance = ew.GetTraveledDistance(Time);
var curDistance = Helper.GetDistance(ew.StartX, ew.StartY, X, Y);
return(curDistance - traveledDistance);
}
// CREDIT: mini sized predictor from Apollon, by rozu
// http://robowiki.net?Apollon
private PointF PredictPosition(BulletWave surfWave, int direction)
{
PointF predictedPosition = new PointF((float)X, (float)Y);
double predictedVelocity = Velocity;
double predictedHeading = HeadingRadians;
double maxTurning, moveAngle, moveDir;
int counter = 0; // number of ticks in the future
bool intercepted = false;
do
{ // the rest of these code comments are rozu's
var angleInRadian = Helper.GetAbsBearingInRadian(surfWave.StartX, surfWave.StartY, predictedPosition.X, predictedPosition.Y) + (direction * (Math.PI / 2));
moveAngle = WallSmoothing(predictedPosition.X, predictedPosition.Y, angleInRadian, direction) - predictedHeading;
moveDir = 1;
if (Math.Cos(moveAngle) < 0)
{
moveAngle += Math.PI;
moveDir = -1;
}
moveAngle = Utils.NormalRelativeAngle(moveAngle);
// maxTurning is built in like this, you can't turn more then this in one tick
maxTurning = Math.PI / 720d * (40d - 3d * Math.Abs(predictedVelocity));
predictedHeading = Utils.NormalRelativeAngle(predictedHeading + Helper.Limit(-maxTurning, moveAngle, maxTurning));
// this one is nice ;). if predictedVelocity and moveDir have
// different signs you want to breack down
// otherwise you want to accelerate (look at the factor "2")
predictedVelocity += (predictedVelocity * moveDir < 0 ? 2 * moveDir : moveDir);
predictedVelocity = Helper.Limit(-8, predictedVelocity, 8);
// calculate the new predicted position
predictedPosition = Helper.GetProjection(predictedPosition.X, predictedPosition.Y, predictedHeading, predictedVelocity);
counter++;
//todo: check if we can add _radius
if (Helper.GetDistance(predictedPosition.X, predictedPosition.Y, surfWave.StartX, surfWave.StartY) + _radius <
surfWave.GetTraveledDistance(Time) + (counter + 1) * surfWave.Velocity)
{
intercepted = true;
}
} while (!intercepted && counter < 500);
return(predictedPosition);
}