public long Evaluate(
EnemyObjectExpressionInfo enemyObjectExpressionInfo, // nullable
long playerXMillis,
long playerYMillis,
long elapsedMillisecondsPerIteration,
IDTDeterministicRandom rng)
{
long operand1 = this.operand1.Evaluate(
enemyObjectExpressionInfo: enemyObjectExpressionInfo,
playerXMillis: playerXMillis,
playerYMillis: playerYMillis,
elapsedMillisecondsPerIteration: elapsedMillisecondsPerIteration,
rng: rng);
long operand2 = this.operand2.Evaluate(
enemyObjectExpressionInfo: enemyObjectExpressionInfo,
playerXMillis: playerXMillis,
playerYMillis: playerYMillis,
elapsedMillisecondsPerIteration: elapsedMillisecondsPerIteration,
rng: rng);
if (this.changeUndefinedOutputToZero && operand1 == 0L && operand2 == 0L)
{
return(0);
}
return(DTMath.ArcTangentScaled(operand1, operand2));
}
// 0 degrees is going straight up
// 90 degrees is going right
// 180 degrees is straight down
// 270 degrees is going left
// (Note function returns value in millidegrees)
public static long?GetMovementDirectionInMillidegrees(long currentX, long currentY, long desiredX, long desiredY)
{
long deltaX = desiredX - currentX;
long deltaY = desiredY - currentY;
if (deltaX == 0 && deltaY == 0)
{
return(null);
}
long angleInMillidegrees = DTMath.ArcTangentScaled(x: deltaX, y: deltaY);
long angle2 = -angleInMillidegrees + 90L * 1000L;
return(DTMath.NormalizeAngleInMillidegrees(angle2));
}
