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#if UNITY_EDITOR
using UnityEditor;
using UnityEditor.Experimental.Rendering.HDPipeline;
#endif
using UnityEngine.Serialization;
namespace UnityEngine.Experimental.Rendering.HDPipeline
{
// This enum extent the original LightType enum with new light type from HD
public enum LightTypeExtent
{
Punctual, // Fallback on LightShape type
Rectangle,
Line,
// Sphere,
// Disc,
};
public enum SpotLightShape { Cone, Pyramid, Box };
//@TODO: We should continuously move these values
// into the engine when we can see them being generally useful
[RequireComponent(typeof(Light))]
public class HDAdditionalLightData : MonoBehaviour
{
#pragma warning disable 414 // CS0414 The private field '...' is assigned but its value is never used
// We can't rely on Unity for our additional data, we need to version it ourself.
[SerializeField]
float m_Version = 1.0f;
#pragma warning restore 414
// To be able to have correct default values for our lights and to also control the conversion of intensity from the light editor (so it is compatible with GI)
// we add intensity (for each type of light we want to manage).
public float directionalIntensity = Mathf.PI; // In Lux
public float punctualIntensity = 600.0f; // Light default to 600 lumen, i.e ~48 candela
public float areaIntensity = 200.0f; // Light default to 200 lumen to better match point light
[Range(0.0f, 100.0f)]
public float m_InnerSpotPercent = 0.0f; // To display this field in the UI this need to be public
public float GetInnerSpotPercent01()
{
return Mathf.Clamp(m_InnerSpotPercent, 0.0f, 100.0f) / 100.0f;
}
[Range(0.0f, 1.0f)]
public float lightDimmer = 1.0f;
// Not used for directional lights.
public float fadeDistance = 10000.0f;
public bool affectDiffuse = true;
public bool affectSpecular = true;
public LightTypeExtent lightTypeExtent = LightTypeExtent.Punctual;
// Only for Spotlight, should be hide for other light
public SpotLightShape spotLightShape = SpotLightShape.Cone;
// Only for Rectangle/Line/box projector lights
public float shapeWidth = 0.5f;
// Only for Rectangle/box projector lights
public float shapeHeight = 0.5f;
// Only for pyramid projector
public float aspectRatio = 1.0f;
// Only for Sphere/Disc
public float shapeRadius = 0.0f;
// Only for Spot/Point - use to cheaply fake specular spherical area light
[Range(0.0f, 1.0f)]
public float maxSmoothness = 1.0f;
// If true, we apply the smooth attenuation factor on the range attenuation to get 0 value, else the attenuation is just inverse square and never reach 0
public bool applyRangeAttenuation = true;
// This is specific for the LightEditor GUI and not use at runtime
public bool useOldInspector = false;
public bool featuresFoldout = true;
public bool showAdditionalSettings = false;
#if UNITY_EDITOR
private void DrawGizmos(bool selected)
{
var light = gameObject.GetComponent<Light>();
var gizmoColor = light.color;
gizmoColor.a = selected ? 1.0f : 0.3f; // Fade for the gizmo
Gizmos.color = Handles.color = gizmoColor;
if (lightTypeExtent == LightTypeExtent.Punctual)
{
switch (light.type)
{
case LightType.Directional:
HDLightEditorUtilities.DrawDirectionalLightGizmo(light);
break;
case LightType.Point:
HDLightEditorUtilities.DrawPointlightGizmo(light, selected);
break;
case LightType.Spot:
if (spotLightShape == SpotLightShape.Cone)
HDLightEditorUtilities.DrawSpotlightGizmo(light, selected);
else if (spotLightShape == SpotLightShape.Pyramid)
HDLightEditorUtilities.DrawFrustumlightGizmo(light);
else if (spotLightShape == SpotLightShape.Box)
HDLightEditorUtilities.DrawFrustumlightGizmo(light);
break;
}
}
else
{
switch (lightTypeExtent)
{
case LightTypeExtent.Rectangle:
HDLightEditorUtilities.DrawArealightGizmo(light);
break;
case LightTypeExtent.Line:
HDLightEditorUtilities.DrawArealightGizmo(light);
break;
}
}
if (selected)
{
DrawVerticalRay();
}
}
// Trace a ray down to better locate the light location
private void DrawVerticalRay()
{
Ray ray = new Ray(transform.position, Vector3.down);
RaycastHit hit;
if (Physics.Raycast(ray, out hit))
{
Handles.color = Color.green;
Handles.zTest = UnityEngine.Rendering.CompareFunction.LessEqual;
Handles.DrawLine(transform.position, hit.point);
Handles.DrawWireDisc(hit.point, hit.normal, 0.5f);
Handles.color = Color.red;
Handles.zTest = UnityEngine.Rendering.CompareFunction.Greater;
Handles.DrawLine(transform.position, hit.point);
Handles.DrawWireDisc(hit.point, hit.normal, 0.5f);
}
}
private void OnDrawGizmos()
{
// DrawGizmos(false);
}
private void OnDrawGizmosSelected()
{
DrawGizmos(true);
}
#endif
// Caution: this function must match the one in HDLightEditor.UpdateLightIntensity - any change need to be replicated
public void ConvertPhysicalLightIntensityToLightIntensity()
{
var light = gameObject.GetComponent<Light>();
if (lightTypeExtent == LightTypeExtent.Punctual)
{
switch (light.type)
{
case LightType.Directional:
light.intensity = directionalIntensity;
break;
case LightType.Point:
light.intensity = LightUtils.ConvertPointLightIntensity(punctualIntensity);
break;
case LightType.Spot:
// Spot should used conversion which take into account the angle, and thus the intensity vary with angle.
// This is not easy to manipulate for lighter, so we simply consider any spot light as just occluded point light. So reuse the same code.
light.intensity = LightUtils.ConvertPointLightIntensity(punctualIntensity);
// TODO: What to do with box shape ?
// var spotLightShape = (SpotLightShape)m_AdditionalspotLightShape.enumValueIndex;
break;
}
}
else if (lightTypeExtent == LightTypeExtent.Rectangle)
{
light.intensity = LightUtils.ConvertRectLightIntensity(areaIntensity, shapeWidth, shapeHeight);
}
else if (lightTypeExtent == LightTypeExtent.Line)
{
light.intensity = LightUtils.CalculateLineLightIntensity(areaIntensity, shapeWidth);
}
}
// As we have our own default value, we need to initialize the light intensity correctly
public static void InitDefaultHDAdditionalLightData(HDAdditionalLightData lightData)
{
// At first init we need to initialize correctly the default value
lightData.ConvertPhysicalLightIntensityToLightIntensity();
// Special treatment for Unity builtin area light. Change it to our rectangle light
var light = lightData.gameObject.GetComponent<Light>();
// Sanity check: lightData.lightTypeExtent is init to LightTypeExtent.Punctual (in case for unknow reasons we recreate additional data on an existing line)
if (light.type == LightType.Area && lightData.lightTypeExtent == LightTypeExtent.Punctual)
{
lightData.lightTypeExtent = LightTypeExtent.Rectangle;
light.type = LightType.Point; // Same as in HDLightEditor
}
}
}
}