public EntitySliceConfiguration BeginSlice()
{
EntitySliceConfiguration newSlice = new EntitySliceConfiguration(this);
return(newSlice);
}
public static void SetupSlice <TSlice>(this EntityRegistry registry, ref TSlice slice) where TSlice : struct
{
EntitySliceConfiguration sliceConfiguration = registry.BeginSlice();
object boxedSlice = slice; //Box it so we can set members with reflection (otherwise they are lost when passed by value)
Type sliceType = typeof(TSlice);
//Find slice output and config members:
FieldInfo[] memberFields = sliceType.GetFields();
foreach (FieldInfo field in memberFields)
{
Type fieldType = field.FieldType;
if (fieldType.Name == typeof(SliceRequirementOutput <>).Name)
{
//Instantiate output and set it back on the slice struct
object outputInstance = Activator.CreateInstance(fieldType);
//Configure entity slice to require this component type and target this output
foreach (MethodInfo methodInfo in typeof(EntitySliceConfiguration).GetMethods())
{
if (methodInfo.IsGenericMethod && (methodInfo.Name == "Require") && (methodInfo.GetParameters().Length == 1))
{
MethodInfo requireMethod = methodInfo.MakeGenericMethod(fieldType.GenericTypeArguments[0]);
sliceConfiguration = (EntitySliceConfiguration)requireMethod.Invoke(sliceConfiguration, new object[] { outputInstance });
field.SetValue(boxedSlice, outputInstance);
break;
}
}
}
else if (fieldType.Name == typeof(SliceEntityOutput).Name)
{
//Instantiate output and set it back on the slice struct
object outputInstance = Activator.CreateInstance(fieldType);
MethodInfo requireMethod = typeof(EntitySliceConfiguration).GetMethod("GetEntities");
sliceConfiguration = (EntitySliceConfiguration)requireMethod.Invoke(sliceConfiguration, new object[] { outputInstance });
field.SetValue(boxedSlice, outputInstance);
}
else if (fieldType.Name == typeof(SliceRequirement <>).Name)
{
//Configure entity slice to require this component type
foreach (MethodInfo methodInfo in typeof(EntitySliceConfiguration).GetMethods())
{
if (methodInfo.IsGenericMethod && (methodInfo.Name == "Require") && (methodInfo.GetParameters().Length == 0))
{
MethodInfo requireMethod = methodInfo.MakeGenericMethod(fieldType.GenericTypeArguments[0]);
sliceConfiguration = (EntitySliceConfiguration)requireMethod.Invoke(sliceConfiguration, null);
break;
}
}
}
else if (fieldType.Name == typeof(SliceExclusion <>).Name)
{
//Configure entity slice to exclude this component type
MethodInfo requireMethod = typeof(EntitySliceConfiguration).GetMethod("Exclude");
MethodInfo genericRequire = requireMethod.MakeGenericMethod(fieldType.GenericTypeArguments[0]);
sliceConfiguration = (EntitySliceConfiguration)genericRequire.Invoke(sliceConfiguration, null);
}
}
sliceConfiguration.CompleteSlice(); //TODO: Would be great to check if a slice is just like another existing slice, and if so just reuse!
slice = (TSlice)boxedSlice;
}