public static Offset GetOffset(
long speedInMillipixelsPerMillisecond,
long movementDirectionInMillidegrees,
long elapsedMillisecondsPerIteration)
{
if (speedInMillipixelsPerMillisecond < 0)
{
throw new Exception();
}
if (speedInMillipixelsPerMillisecond == 0)
{
return new Offset {
DeltaXInMillipixels = 0, DeltaYInMillipixels = 0
}
}
;
movementDirectionInMillidegrees = DTMath.NormalizeAngleInMillidegrees(movementDirectionInMillidegrees);
long numberOfMillipixels = speedInMillipixelsPerMillisecond * elapsedMillisecondsPerIteration;
return(new Offset
{
DeltaXInMillipixels = numberOfMillipixels * DTMath.SineScaled(milliDegrees: movementDirectionInMillidegrees) / 1000L,
DeltaYInMillipixels = numberOfMillipixels * DTMath.CosineScaled(milliDegrees: movementDirectionInMillidegrees) / 1000L
});
}
public long Evaluate(
EnemyObjectExpressionInfo enemyObjectExpressionInfo, // nullable
long playerXMillis,
long playerYMillis,
long elapsedMillisecondsPerIteration,
IDTDeterministicRandom rng)
{
long operand = this.operand.Evaluate(
enemyObjectExpressionInfo: enemyObjectExpressionInfo,
playerXMillis: playerXMillis,
playerYMillis: playerYMillis,
elapsedMillisecondsPerIteration: elapsedMillisecondsPerIteration,
rng: rng);
return(DTMath.SineScaled(operand));
}