private Dictionary <PoolBall, PocketTrigger> FilterTheBestPocketForEachBallWithCueBall(Dictionary <PoolBall, List <PocketTrigger> > considerBalls, Vector3 cueBallPosition)
{
Dictionary <PoolBall, PocketTrigger> optimalBalls = new Dictionary <PoolBall, PocketTrigger>();
foreach (var v in considerBalls)
{
PoolBall ball = v.Key;
float bestAngle = 70;
PocketTrigger bestPocket = null;
for (int i = 0, count = v.Value.Count; i < count; i++)
{
PocketTrigger pocket = v.Value[i];
// is any obstacle between the ball hit position and the cueball ?
bool b1 = !CheckObastacleBetweenTargetPositionAndCueball(ball, ConsiderHitPoint(ball, pocket), cueBallPosition);
if (b1)
{
float angle = MathTools.AngleBetween(ball.transform.position - cueBallPosition, pocket.pointerPosition - ball.transform.position);
if (angle < bestAngle)
{
bestPocket = pocket;
bestAngle = angle;
}
}
}
optimalBalls.Add(ball, bestPocket);
}
return(optimalBalls);
}
private Vector3 ConsiderHitPoint(Dictionary <PoolBall, List <PocketTrigger> > considerBalls, Vector3 cueBallPosition, out PoolBall targetBall, out PocketTrigger targetTrigger)
{
Dictionary <PoolBall, PocketTrigger> optimalBalls = FilterTheBestPocketForEachBallWithCueBall(considerBalls, cueBallPosition);
//Dictionary<PoolBall, float> ballCuebalAngles = new Dictionary<PoolBall, float>();
List <float> angles = new List <float>();
List <PoolBall> balls = new List <PoolBall>();
float totleAngle = 0;
foreach (var v in optimalBalls)
{
PoolBall ball = v.Key;
PocketTrigger trigger = v.Value;
if (!trigger)
{
continue;
}
float angle = MathTools.AngleBetween(ball.transform.position - cueBallPosition, trigger.pointerPosition - ball.transform.position);
//夹角越大， 旋转击打这个球的概率就越小，所以这里用90 - angle
angle = 90 - angle;
totleAngle += angle;
balls.Add(ball);
angles.Add(angle);
}
//随机选择一个击打球
float rand = Random.Range(0, totleAngle), threshold = 0;
for (int i = 0, count = angles.Count; i < count; i++)
{
threshold += angles[i];
if (rand < threshold)
{
PoolBall k = balls[i];
targetBall = k;
targetTrigger = optimalBalls[k];
return(ConsiderHitPoint(targetBall, targetTrigger));
}
}
targetTrigger = null;
targetBall = null;
return(Vector3.zero);
}