private void UpdateBallDirAndSpeed(float ticksToTravel)
{
Vector2 endPos = mRoad.RoadSegmentEndPos(mCurrentRoadSegment);
Vector2 dir = endPos - Center;
VelocityDirection = dir;
// amount of time we have to travel the remaining of the road segment
float totalLength = mRoad.RoadSegmentLength(mCurrentRoadSegment);
float remainLehgth = dir.Length();
float percentLeft = remainLehgth / totalLength;
float ticksLeft = ticksToTravel * percentLeft;
Speed = remainLehgth / ticksLeft;
}
private void UpdateCarDirAndSpeed()
{
Vector2 targetDir = mRoad.RoadSegmentEndPos(mCurrentRoadSegment) - Center;
targetDir.Normalize();
float theta = (float)((180.0 / Math.PI) *
Math.Acos((double)Vector2.Dot(FrontDirection, targetDir)));
if (theta > 0.001f)
{ // if not already in the same direction
Vector3 myDir3 = new Vector3(FrontDirection, 0f);
Vector3 targetDir3 = new Vector3(targetDir, 0f);
Vector3 sign = Vector3.Cross(myDir3, targetDir3);
RotateAngle += Math.Sign(sign.Z) * theta * mTurnRate;
VelocityDirection = FrontDirection;
}
}