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using System;
namespace UnityEngine.Perception.Randomization.Parameters
{
/// <summary>
/// Used to apply sampled parameter values to a particular GameObject, Component, and property.
/// Typically managed by a parameter configuration.
/// </summary>
[Serializable]
public class ParameterTarget
{
[SerializeField] internal GameObject gameObject;
[SerializeField] internal Component component;
[SerializeField] internal string propertyName = "";
[SerializeField] internal FieldOrProperty fieldOrProperty;
[SerializeField] internal ParameterApplicationFrequency applicationFrequency;
/// <summary>
/// Assigns a new target
/// </summary>
/// <param name="targetObject">The target GameObject</param>
/// <param name="targetComponent">The target component on the target GameObject</param>
/// <param name="fieldOrPropertyName">The name of the property to apply the parameter to</param>
/// <param name="frequency">How often to apply the parameter to its target</param>
public void AssignNewTarget(
GameObject targetObject,
Component targetComponent,
string fieldOrPropertyName,
ParameterApplicationFrequency frequency)
{
gameObject = targetObject;
component = targetComponent;
propertyName = fieldOrPropertyName;
applicationFrequency = frequency;
var componentType = component.GetType();
fieldOrProperty = componentType.GetField(fieldOrPropertyName) != null
? FieldOrProperty.Field
: FieldOrProperty.Property;
}
internal void Clear()
{
gameObject = null;
component = null;
propertyName = string.Empty;
}
internal void ApplyValueToTarget(object value)
{
var componentType = component.GetType();
if (fieldOrProperty == FieldOrProperty.Field)
{
var field = componentType.GetField(propertyName);
if (field == null)
throw new ParameterValidationException(
$"Component type {componentType.Name} does not have a field named {propertyName}");
field.SetValue(component, value);
}
else
{
var property = componentType.GetProperty(propertyName);
if (property == null)
throw new ParameterValidationException(
$"Component type {componentType.Name} does not have a property named {propertyName}");
property.SetValue(component, value);
}
}
}
/// <summary>
/// How often to apply a new sample to a parameter's target
/// </summary>
public enum ParameterApplicationFrequency
{
OnIterationSetup,
EveryFrame
}
enum FieldOrProperty
{
Field, Property
}
}