/// <summary>
/// Given a node, pull the direction nodes out from underneath it and store them if necessary.
/// </summary>
/// <param name="taskToCheck">task to check if has a child direction node.</param>
private void GetDirectionTasks(BulletMLTask taskToCheck)
{
// Check if this fire task has a direction node
var directionNode = taskToCheck?.Node.GetChild(NodeName.direction) as DirectionNode;
if (directionNode == null)
{
return;
}
if (DirectionTask == null)
{
DirectionTask = new DirectionTask(directionNode, taskToCheck);
}
}
/// <summary>
/// Sets up the task to be run.
/// </summary>
/// <param name="bullet">The bullet.</param>
protected override void SetupTask(Bullet bullet)
{
// Get the direction to shoot the bullet
// Does this fire node contain a direction node?
if (DirectionTask != null)
{
// Set the fire direction to the "initial" value
var newBulletDirection = DirectionTask.GetNodeValue(bullet);
switch (DirectionTask.Node.NodeType)
{
case NodeType.absolute:
{
// The new bullet points right at a particular direction
FireDirection = newBulletDirection;
}
break;
case NodeType.relative:
{
// The new bullet's direction will be relative to the old bullet's one
FireDirection = MathHelper.ToDegrees(bullet.Direction) + newBulletDirection;
}
break;
case NodeType.aim:
{
// Aim the bullet at the player
FireDirection = MathHelper.ToDegrees(bullet.GetAimDirection()) + newBulletDirection;
}
break;
case NodeType.sequence:
{
// The new bullet's direction will be relative to the last fired bullet's one
if (_isRunning)
{
var lastFireDirection = MathHelper.ToDegrees(_lastFireDirection);
FireDirection = lastFireDirection + newBulletDirection;
}
else
{
var lastSetupDirection = MathHelper.ToDegrees(_lastSetupDirection);
FireDirection = lastSetupDirection + newBulletDirection;
}
}
break;
default:
{
// Aim the bullet at the player
FireDirection = MathHelper.ToDegrees(bullet.GetAimDirection()) + newBulletDirection;
}
break;
}
}
else
{
// There isn't direction task, so just aim at the player.
FireDirection = MathHelper.ToDegrees(bullet.GetAimDirection());
}
// Convert from degrees to radians
FireDirection = MathHelper.ToRadians(FireDirection);
// Set the speed to shoot the bullet
// Does this fire node contain a speed node?
if (SpeedTask != null)
{
// Set the shoot speed to the "initial" value.
var newBulletSpeed = SpeedTask.GetNodeValue(bullet);
switch (SpeedTask.Node.NodeType)
{
case NodeType.relative:
{
// The new bullet speed will be relative to the old bullet
FireSpeed = bullet.Speed + newBulletSpeed;
}
break;
case NodeType.sequence:
{
// If there is a sequence node, add the value to the bullet's speed
if (_isRunning)
{
FireSpeed = _lastFireSpeed + newBulletSpeed;
}
else
{
FireSpeed = _lastSetupSpeed + newBulletSpeed;
}
}
break;
default:
{
// The new bullet shoots at a predeterminde speed
FireSpeed = newBulletSpeed;
}
break;
}
}
else
{
// There is no speed node in the fire node
FireSpeed = Math.Abs(bullet.Speed) > float.Epsilon ? bullet.Speed : 0f;
}
if (ScaleTask != null)
{
var newBulletScale = ScaleTask.GetNodeValue(bullet);
switch (ScaleTask.Node.NodeType)
{
case NodeType.relative:
{
FireScale = bullet.Scale + newBulletScale;
}
break;
case NodeType.sequence:
{
if (_isRunning)
{
FireScale = _lastFireScale + newBulletScale;
}
else
{
FireScale = _lastSetupScale + newBulletScale;
}
}
break;
default:
{
FireScale = newBulletScale;
}
break;
}
}
else
{
FireScale = 1f;
}
// Store setup direction/speed for sequence type
_lastSetupDirection = FireDirection;
_lastSetupSpeed = FireSpeed;
_lastSetupScale = FireScale;
}