/// <summary>
/// Captures the current values for a given entity and creates a keyframe
/// at the given time and with the captured values
/// </summary>
/// <param name="entity">entity to capture</param>
/// <param name="time">Time to create keyframe at</param>
public void Capture(Entity entity, int time)
{
if (entity == null)
{
throw new ArgumentNullException(nameof(entity), "entity cannot be null");
}
PerfStopwatch stopwatch = PerfStopwatch.StartNew("Capturing New keyframe");
//Get all behaviours on entity
IEnumerable <BehaviourComponent> behaviours = entity.Components;
List <KeyframePropertyData> propertyData = new List <KeyframePropertyData>();
foreach (BehaviourComponent behaviour in behaviours)
{
//Check if the cache contains entry for this behaviour
if (!keyframeInfoCache.ContainsKey(behaviour))
{
//Get all properties with the KeyframeAnimationProperty attribute
Type behaviourType = behaviour.GetType();
IEnumerable <PropertyInfo> reflectedProperties = behaviourType.GetProperties().Where(
prop => Attribute.IsDefined(prop, typeof(KeyframeProperty))
);
List <KeyframePropertyInfo> propInfos = new List <KeyframePropertyInfo>();
foreach (PropertyInfo propInfo in reflectedProperties)
{
if (!propInfo.CanWrite || !propInfo.CanRead)
{
DebugUtil.LogWithLocation($"Property {propInfo.Name} needs both read and write access");
continue;
}
propInfos.Add(new KeyframePropertyInfo(propInfo, PropertyType.Interpolatable));
}
keyframeInfoCache.Add(behaviour, propInfos.ToArray());
}
KeyframePropertyInfo[] properties = keyframeInfoCache[behaviour];
for (int i = 0, l = properties.Length; i < l; i++)
{
object currentPropertyValue = properties[i].Property.GetValue(behaviour);
KeyframePropertyData key = new ValueKeyframe(properties[i], behaviour, currentPropertyValue);
//Add it to the timeline
propertyData.Add(key);
}
}
//Check if entity has a timeline or if we need to create one for it
if (!timelines.ContainsKey(entity))
{
CreateTimeline(entity);
}
KeyContainer newKey = new KeyContainer(propertyData);
newKey.Time = time;
timelines[entity].AddKeyframe(newKey);
stopwatch.Stop();
}
private void SeekValueKeyframe(KeyframeTimeline timeline, KeyframePropertyInfo property, int time)
{
//Get closest keys
KeySet interval = timeline.GetClosestKeys(property, time);
//int t = 5;
Type valueType = property.Property.PropertyType;
//If both keys are the same, no need for interpolation
if (interval.TimeBefore == interval.TimeAfter)
{
ValueKeyframe value = timeline.GetPropertyKey(property, interval.TimeBefore) as ValueKeyframe;
if (value == null)
{
//Property had no keyframes or was not a value keyframe there is nothing to do, just return
return;
}
property.Property.SetValue(value.Target, value.Value);
}
else
{
if (interpolatorCache.ContainsKey(valueType))
{
ValueKeyframe from = timeline.GetPropertyKey(property, interval.TimeBefore) as ValueKeyframe;
ValueKeyframe to = timeline.GetPropertyKey(property, interval.TimeAfter) as ValueKeyframe;
double diff = interval.TimeAfter - interval.TimeBefore;
double diffFromLowest = time - interval.TimeBefore;
if (diff == 0)
{
DebugUtil.LogWithLocation($"Difference between keyframes was 0, cannot continue");
return;
}
double t = diffFromLowest / diff;
object interpolatedValue = interpolatorCache[valueType].InterpolateBetween(from.Value, to.Value, t);
property.Property.SetValue(from.Target, interpolatedValue);
}
else
{
DebugUtil.LogWithLocation($"Interpolator cache did not contain a implementation for type {valueType}");
}
}
}
