private int m_TargetId = 0; // id of the last modified state (for triggering enable / disable callbacks)
/// <summary>
/// manages a list of states and corresponding presets for a
/// component. loads the presets into memory on startup, and
/// allows applying them from memory to the component.
/// states are enabled in a layered manner, that is: the
/// default state is always alive, and any enabled states are
/// applied on top of it in the order of which they were enabled.
///
/// this class doesn't store any preset data between sessions.
/// it is merely used to manipulate the component using a list
/// of states that is sent along at startup. it is very silent
/// and forgiving; it won't complain if a state isn't found
/// (since providing a certain state should not be considered
/// mandatory for a component, and states can be set recursively).
/// it will also ignore empty presets
/// </summary>
public vp_AIStateManager(vp_AIComponent component, List <vp_AIState> states)
{
m_States = states;
m_Component = component;
// create default state and add it to the list
m_Component.RefreshDefaultState();
// refresh the initial state, needed for being able to save
// partial presets in the editor
#if UNITY_EDITOR
m_Component.RefreshInitialState();
#endif
// load states and initialize the state id dictionary
m_StateIds = new Dictionary <string, int>(System.StringComparer.CurrentCulture);
foreach (vp_AIState s in m_States)
{
s.StateManager = this;
// store the name and list index of each state in a dictionary for
// fast lookup. IMPORTANT: the state list (m_States) must never be
// modified at runtime (i.e. have states reordered, added, renamed
// or removed) or the dictionary (m_StateIds) will be out of date
if (!m_StateIds.ContainsKey(s.Name))
{
m_StateIds.Add(s.Name, m_States.IndexOf(s));
}
else
{
Debug.LogWarning("Warning: " + m_Component.GetType() + " on '" + m_Component.name + "' has more than one state named: '" + s.Name + "'. Only the topmost one will be used.");
m_States[m_DefaultId].StatesToBlock.Add(m_States.IndexOf(s));
}
// load up the preset of each user assigned state and
if (s.Preset == null)
{
s.Preset = new vp_AIComponentPreset();
}
if (s.TextAsset != null)
{
s.Preset.LoadFromTextAsset(s.TextAsset);
}
}
// the default state of a component is always the last one in the list
m_DefaultId = m_States.Count - 1;
}
/// <summary>
/// combines all the states in the list to a temporary state,
/// and sets it on the component
/// </summary>
public void CombineStates()
{
// go backwards so default state is applied first
for (int v = m_States.Count - 1; v > -1; v--)
{
if (v != m_DefaultId)
{
if (!m_States[v].Enabled)
{
continue;
}
if (m_States[v].Blocked)
{
continue;
}
if (m_States[v].TextAsset == null)
{
continue;
}
}
if (m_States[v].Preset == null)
{
continue;
}
if (m_States[v].Preset.ComponentType == null)
{
continue;
}
vp_AIComponentPreset.Apply(m_Component, m_States[v].Preset);
}
#if UNITY_EDITOR
m_Component.RefreshInitialState();
#endif
}