private static ObjectAction GetShootBulletAction(
Dictionary <string, DTDanmakuImage> spriteNameToImageDictionary,
Dictionary <string, EnemyObjectTemplate> enemyObjectTemplates,
GuidGenerator guidGenerator)
{
string angleVariable = guidGenerator.NextGuid();
string shootCooldownVariable = guidGenerator.NextGuid();
ObjectAction initializeAngleVariable = ObjectActionGenerator.DoOnce(
ObjectAction.SetNumericVariable(angleVariable, MathExpression.RandomInteger(360 * 1000)));
ObjectAction updateAngleVariableAction = ObjectAction.Union(
ObjectAction.SetNumericVariable(
angleVariable,
MathExpression.Add(MathExpression.Variable(angleVariable), MathExpression.Multiply(MathExpression.Constant(150), MathExpression.ElapsedMillisecondsPerIteration()))),
ObjectAction.Condition(
condition: BooleanExpression.GreaterThan(MathExpression.Variable(angleVariable), MathExpression.Constant(360 * 1000)),
action: ObjectAction.SetNumericVariable(angleVariable, MathExpression.Subtract(MathExpression.Variable(angleVariable), MathExpression.Constant(360 * 1000)))),
ObjectAction.Condition(
condition: BooleanExpression.GreaterThan(MathExpression.Variable(angleVariable), MathExpression.Constant(360 * 1000)),
action: ObjectAction.SetNumericVariable(angleVariable, MathExpression.Constant(0))));
ObjectAction createBulletAction = ObjectAction.Condition(
condition: BooleanExpression.Variable("can shoot"),
action: SpawnBullet(
bulletDirectionInMillidegrees: MathExpression.ParentVariable(angleVariable),
spriteNameToImageDictionary: spriteNameToImageDictionary,
enemyObjectTemplates: enemyObjectTemplates,
guidGenerator: guidGenerator));
IMathExpression shootCooldownInMillis = MathExpression.Constant(50);
ObjectAction startCooldownAction = ObjectAction.SetNumericVariable(shootCooldownVariable, shootCooldownInMillis);
ObjectAction decrementCooldownAction = ObjectAction.SetNumericVariable(shootCooldownVariable, MathExpression.Subtract(MathExpression.Variable(shootCooldownVariable), MathExpression.ElapsedMillisecondsPerIteration()));
ObjectAction createBulletWhenCooldownFinishedAction = ObjectAction.Condition(
condition: BooleanExpression.LessThanOrEqualTo(MathExpression.Variable(shootCooldownVariable), MathExpression.Constant(0)),
action: ObjectAction.Union(startCooldownAction, createBulletAction));
return(ObjectAction.Union(
initializeAngleVariable,
updateAngleVariableAction,
ObjectActionGenerator.DoOnce(startCooldownAction),
decrementCooldownAction,
createBulletWhenCooldownFinishedAction));
}
