public static DReal RandomRange(DReal min, DReal max)
{
var range = DReal.Max(0, max - min);
var n = RandomValue() / (uint)0xFFFFFFFF;
return(n * range + min);
}
// This could be smarter. If dest is too close & perpendicular, then the tank
// can end up circling around.
public void MoveTowards(DVector2 dest)
{
ComSat.Trace(this, "MoveTowards");
var dir = dest - entity.position; // also vector to dest.
var targetAngle = DVector2.ToAngle(dir);
var baseAngle = Utility.CalculateNewAngle(entity.rotation, targetAngle, DReal.Radians(turnSpeed));
entity.rotation = baseAngle;
// Move along current heading. Ramp speed up as the angle gets closer.
// Augh.
// [-pi,pi] => [0,2pi]
if (targetAngle < 0)
{
targetAngle += DReal.TwoPI;
}
// Get targetAngle within +/- pi of baseAngle.
if (targetAngle < baseAngle - DReal.PI)
{
targetAngle += DReal.TwoPI;
}
else if (targetAngle > baseAngle + DReal.PI)
{
targetAngle -= DReal.TwoPI;
}
var diff = DReal.Abs(baseAngle - targetAngle);
if (canMoveWithoutTurning || diff < maxMoveAngle)
{
var distance = dir.magnitude;
//print("Distance: " + distance + " speed is: " + tickSpeed);
var speed = minSpeed + (maxSpeed - minSpeed) * (1 - (diff / DReal.PI));
if (distance < speed)
{
speed = DReal.Max(minSpeed, distance);
}
entity.velocity = canMoveWithoutTurning ? dir.normalized * speed : DVector2.FromAngle(baseAngle) * speed;
}
else
{
Stop();
}
}