private int GetAlphaForCoordinates(int objX, int objY, ICharacter character)
{
if (!_configurationProvider.ShowTransition)
{
return(255);
}
//get the farther away of X or Y coordinate for the map object
var metric = Math.Max(Math.Abs(objX - character.RenderProperties.MapX),
Math.Abs(objY - character.RenderProperties.MapY));
int alpha;
if (!_mapTransitionState.StartTime.HasValue ||
metric < _mapTransitionState.TransitionMetric ||
_mapTransitionState.TransitionMetric == 0)
{
alpha = 255;
}
else if (metric == _mapTransitionState.TransitionMetric)
{
var ms = (DateTime.Now - _mapTransitionState.StartTime).TotalMilliseconds;
alpha = (int)Math.Round(ms / TRANSITION_TIME_MS * 255);
if (ms / TRANSITION_TIME_MS >= 1)
{
_mapTransitionState = new MapTransitionState(DateTime.Now, _mapTransitionState.TransitionMetric + 1);
}
}
else
{
alpha = 0;
}
return(alpha);
}
public void StartMapTransition()
{
_mapTransitionState = new MapTransitionState(DateTime.Now, 1);
}