473 lines
17 KiB
C#
473 lines
17 KiB
C#
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#if DEBUG
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//#define DEBUG_SHOW_RAYCAST_LINES
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#endif
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using UnityEngine;
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using UnityEngine.Serialization;
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namespace VLB
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{
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[ExecuteInEditMode]
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[HelpURL(Consts.Help.SD.UrlDynamicOcclusionRaycasting)]
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public class DynamicOcclusionRaycasting : DynamicOcclusionAbstractBase
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{
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public new const string ClassName = "DynamicOcclusionRaycasting";
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/// <summary>
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/// Should it interact with 2D or 3D occluders?
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/// </summary>
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public Dimensions dimensions = Consts.DynOcclusion.RaycastingDimensionsDefault;
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/// <summary>
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/// The beam can only be occluded by objects located on the layers matching this mask.
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/// It's very important to set it as restrictive as possible (checking only the layers which are necessary)
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/// to perform a more efficient process in order to increase the performance.
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/// </summary>
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public LayerMask layerMask = Consts.DynOcclusion.LayerMaskDefault;
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/// <summary>
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/// Should this beam be occluded by triggers or not?
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/// </summary>
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public bool considerTriggers = Consts.DynOcclusion.RaycastingConsiderTriggersDefault;
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/// <summary>
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/// Minimum 'area' of the collider to become an occluder.
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/// Colliders smaller than this value will not block the beam.
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/// </summary>
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public float minOccluderArea = Consts.DynOcclusion.RaycastingMinOccluderAreaDefault;
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/// <summary>
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/// Approximated percentage of the beam to collide with the surface in order to be considered as occluder
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/// </summary>
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public float minSurfaceRatio = Consts.DynOcclusion.RaycastingMinSurfaceRatioDefault;
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/// <summary>
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/// Max angle (in degrees) between the beam and the surface in order to be considered as occluder
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/// </summary>
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public float maxSurfaceDot = Consts.DynOcclusion.RaycastingMaxSurfaceDotDefault;
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/// <summary>
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/// Alignment of the computed clipping plane:
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/// </summary>
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public PlaneAlignment planeAlignment = Consts.DynOcclusion.RaycastingPlaneAlignmentDefault;
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/// <summary>
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/// Translate the plane. We recommend to set a small positive offset in order to handle non-flat surface better.
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/// </summary>
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public float planeOffset = Consts.DynOcclusion.RaycastingPlaneOffsetDefault;
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/// <summary>
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/// Fade out the beam before the computed clipping plane in order to soften the transition.
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/// </summary>
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[FormerlySerializedAs("fadeDistanceToPlane")]
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public float fadeDistanceToSurface = Consts.DynOcclusion.RaycastingFadeDistanceToSurfaceDefault;
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[System.Obsolete("Use 'fadeDistanceToSurface' instead")]
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public float fadeDistanceToPlane { get { return fadeDistanceToSurface; } set { fadeDistanceToSurface = value; } }
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public bool IsColliderHiddenByDynamicOccluder(Collider collider)
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{
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Debug.Assert(collider, "You should pass a valid Collider to VLB.DynamicOcclusion.IsColliderHiddenByDynamicOccluder");
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if (!planeEquationWS.IsValid())
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return false;
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var isInside = GeometryUtility.TestPlanesAABB(new Plane[] { planeEquationWS }, collider.bounds);
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return !isInside;
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}
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public struct HitResult
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{
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public HitResult(ref RaycastHit hit3D)
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{
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point = hit3D.point;
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normal = hit3D.normal;
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distance = hit3D.distance;
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collider3D = hit3D.collider;
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collider2D = null;
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}
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public HitResult(ref RaycastHit2D hit2D)
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{
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point = hit2D.point;
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normal = hit2D.normal;
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distance = hit2D.distance;
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collider2D = hit2D.collider;
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collider3D = null;
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}
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public Vector3 point;
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public Vector3 normal;
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public float distance;
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Collider2D collider2D;
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Collider collider3D;
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public bool hasCollider { get { return collider2D || collider3D; } }
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public string name
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{
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get
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{
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if (collider3D) return collider3D.name;
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else if (collider2D) return collider2D.name;
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else return "null collider";
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}
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}
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public Bounds bounds
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{
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get
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{
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if (collider3D) return collider3D.bounds;
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else if (collider2D) return collider2D.bounds;
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else return new Bounds();
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}
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}
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public void SetNull() { collider2D = null; collider3D = null; }
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}
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/// <summary>
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/// Get information about the current occluder hit by the beam.
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/// Can be null if the beam is not occluded.
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/// </summary>
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HitResult m_CurrentHit;
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protected override string GetShaderKeyword() { return ShaderKeywords.SD.OcclusionClippingPlane; }
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protected override MaterialManager.SD.DynamicOcclusion GetDynamicOcclusionMode() { return MaterialManager.SD.DynamicOcclusion.ClippingPlane; }
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float m_RangeMultiplier = 1f;
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public Plane planeEquationWS { get; private set; }
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#if UNITY_EDITOR
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public HitResult editorCurrentHitResult { get { return m_CurrentHit; } }
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public struct EditorDebugData
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{
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public int lastFrameUpdate;
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}
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public EditorDebugData editorDebugData;
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public static bool editorShowDebugPlane = true;
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public static bool editorRaycastAtEachFrame = true;
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private static bool editorPrefsLoaded = false;
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public static void EditorLoadPrefs()
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{
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if (!editorPrefsLoaded)
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{
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editorShowDebugPlane = UnityEditor.EditorPrefs.GetBool(EditorPrefsStrings.DynOcclusion.PrefShowDebugPlane, true);
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editorRaycastAtEachFrame = UnityEditor.EditorPrefs.GetBool(EditorPrefsStrings.DynOcclusion.PrefRaycastingEditor, true);
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editorPrefsLoaded = true;
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}
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}
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#endif
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protected override void OnValidateProperties()
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{
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base.OnValidateProperties();
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minOccluderArea = Mathf.Max(minOccluderArea, 0f);
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fadeDistanceToSurface = Mathf.Max(fadeDistanceToSurface, 0f);
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}
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protected override void OnEnablePostValidate()
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{
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m_CurrentHit.SetNull();
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#if UNITY_EDITOR
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EditorLoadPrefs();
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editorDebugData.lastFrameUpdate = 0;
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#endif
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}
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protected override void OnDisable()
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{
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base.OnDisable();
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SetHitNull();
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}
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void Start()
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{
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if (Application.isPlaying)
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{
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var triggerZone = GetComponent<TriggerZone>();
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if (triggerZone)
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{
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m_RangeMultiplier = Mathf.Max(1f, triggerZone.rangeMultiplier);
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}
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}
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}
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Vector3 GetRandomVectorAround(Vector3 direction, float angleDiff)
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{
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var halfAngle = angleDiff * 0.5f;
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return Quaternion.Euler(Random.Range(-halfAngle, halfAngle), Random.Range(-halfAngle, halfAngle), Random.Range(-halfAngle, halfAngle)) * direction;
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}
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QueryTriggerInteraction queryTriggerInteraction { get { return considerTriggers ? QueryTriggerInteraction.Collide : QueryTriggerInteraction.Ignore; } }
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float raycastMaxDistance { get { return m_Master.raycastDistance * m_RangeMultiplier * m_Master.GetLossyScale().z; } }
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HitResult GetBestHit(Vector3 rayPos, Vector3 rayDir)
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{
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return dimensions == Dimensions.Dim2D ? GetBestHit2D(rayPos, rayDir) : GetBestHit3D(rayPos, rayDir);
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}
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HitResult GetBestHit3D(Vector3 rayPos, Vector3 rayDir)
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{
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var hits = Physics.RaycastAll(rayPos, rayDir, raycastMaxDistance, layerMask.value, queryTriggerInteraction);
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int bestHit = -1;
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float bestLength = float.MaxValue;
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for (int i = 0; i < hits.Length; ++i)
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{
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if (hits[i].collider.gameObject != m_Master.gameObject) // skip collider from TriggerZone
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{
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if (hits[i].collider.bounds.GetMaxArea2D() >= minOccluderArea)
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{
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if (hits[i].distance < bestLength)
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{
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bestLength = hits[i].distance;
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bestHit = i;
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}
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}
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}
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}
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#if DEBUG_SHOW_RAYCAST_LINES
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Debug.DrawLine(rayPos, rayPos + rayDir * raycastMaxDistance, bestHit != -1 ? Color.green : Color.red);
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#endif
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if (bestHit != -1)
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return new HitResult(ref hits[bestHit]);
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else
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return new HitResult();
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}
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HitResult GetBestHit2D(Vector3 rayPos, Vector3 rayDir)
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{
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var hits = Physics2D.RaycastAll(new Vector2(rayPos.x, rayPos.y), new Vector2(rayDir.x, rayDir.y), raycastMaxDistance, layerMask.value);
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int bestHit = -1;
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float bestLength = float.MaxValue;
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for (int i = 0; i < hits.Length; ++i)
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{
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if (!considerTriggers && hits[i].collider.isTrigger) // do not query triggers if considerTriggers is disabled
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continue;
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if (hits[i].collider.gameObject != m_Master.gameObject) // skip collider from TriggerZone
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{
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if (hits[i].collider.bounds.GetMaxArea2D() >= minOccluderArea)
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{
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if (hits[i].distance < bestLength)
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{
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bestLength = hits[i].distance;
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bestHit = i;
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}
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}
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}
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}
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#if DEBUG_SHOW_RAYCAST_LINES
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Debug.DrawLine(rayPos, rayPos + rayDir * raycastMaxDistance, bestHit != -1 ? Color.green : Color.red);
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#endif
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if (bestHit != -1)
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return new HitResult(ref hits[bestHit]);
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else
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return new HitResult();
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}
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enum Direction {
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Up,
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Down,
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Left,
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Right,
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Max2D = Down,
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Max3D = Right,
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};
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uint m_PrevNonSubHitDirectionId = 0;
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uint GetDirectionCount() { return dimensions == Dimensions.Dim2D ? ((uint)Direction.Max2D + 1) : ((uint)Direction.Max3D + 1); }
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Vector3 GetDirection(uint dirInt)
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{
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dirInt = dirInt % GetDirectionCount();
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switch (dirInt)
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{
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case (uint)Direction.Up: return m_Master.raycastGlobalUp;
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case (uint)Direction.Right: return m_Master.raycastGlobalRight;
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case (uint)Direction.Down: return -m_Master.raycastGlobalUp;
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case (uint)Direction.Left: return -m_Master.raycastGlobalRight;
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}
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return Vector3.zero;
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}
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bool IsHitValid(ref HitResult hit, Vector3 forwardVec)
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{
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if (hit.hasCollider)
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{
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float dot = Vector3.Dot(hit.normal, -forwardVec);
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return dot >= maxSurfaceDot;
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}
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return false;
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}
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protected override bool OnProcessOcclusion(ProcessOcclusionSource source)
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{
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#if UNITY_EDITOR
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editorDebugData.lastFrameUpdate = Time.frameCount;
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#endif
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var raycastGlobalForward = m_Master.raycastGlobalForward;
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var bestHit = GetBestHit(transform.position, raycastGlobalForward);
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if (IsHitValid(ref bestHit, raycastGlobalForward))
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{
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if (minSurfaceRatio > 0.5f)
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{
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var raycastDistance = m_Master.raycastDistance;
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for (uint i = 0; i < GetDirectionCount(); i++)
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{
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var dir3 = GetDirection(i + m_PrevNonSubHitDirectionId) * (minSurfaceRatio * 2 - 1);
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dir3.Scale(transform.localScale);
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var startPt = transform.position + dir3 * m_Master.coneRadiusStart;
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var newPt = transform.position + dir3 * m_Master.coneRadiusEnd + raycastGlobalForward * raycastDistance;
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var bestHitSub = GetBestHit(startPt, (newPt - startPt).normalized);
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if (IsHitValid(ref bestHitSub, raycastGlobalForward))
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{
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if (bestHitSub.distance > bestHit.distance)
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{
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bestHit = bestHitSub;
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}
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}
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else
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{
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m_PrevNonSubHitDirectionId = i;
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bestHit.SetNull();
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break;
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}
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}
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}
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}
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else
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{
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bestHit.SetNull();
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}
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SetHit(ref bestHit);
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return bestHit.hasCollider;
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}
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void SetHit(ref HitResult hit)
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{
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if (!hit.hasCollider)
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{
|
|||
|
|
SetHitNull();
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
switch (planeAlignment)
|
|||
|
|
{
|
|||
|
|
case PlaneAlignment.Beam:
|
|||
|
|
SetClippingPlane(new Plane(-m_Master.raycastGlobalForward, hit.point));
|
|||
|
|
break;
|
|||
|
|
case PlaneAlignment.Surface:
|
|||
|
|
default:
|
|||
|
|
SetClippingPlane(new Plane(hit.normal, hit.point));
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
m_CurrentHit = hit;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void SetHitNull()
|
|||
|
|
{
|
|||
|
|
SetClippingPlaneOff();
|
|||
|
|
m_CurrentHit.SetNull();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
protected override void OnModifyMaterialCallback(MaterialModifier.Interface owner)
|
|||
|
|
{
|
|||
|
|
Debug.Assert(owner != null);
|
|||
|
|
var planeWS = planeEquationWS;
|
|||
|
|
owner.SetMaterialProp(ShaderProperties.SD.DynamicOcclusionClippingPlaneWS, new Vector4(planeWS.normal.x, planeWS.normal.y, planeWS.normal.z, planeWS.distance));
|
|||
|
|
owner.SetMaterialProp(ShaderProperties.SD.DynamicOcclusionClippingPlaneProps, fadeDistanceToSurface);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void SetClippingPlane(Plane planeWS)
|
|||
|
|
{
|
|||
|
|
planeWS = planeWS.TranslateCustom(planeWS.normal * planeOffset);
|
|||
|
|
SetPlaneWS(planeWS);
|
|||
|
|
Debug.Assert(m_MaterialModifierCallbackCached != null);
|
|||
|
|
m_Master._INTERNAL_SetDynamicOcclusionCallback(GetShaderKeyword(), m_MaterialModifierCallbackCached);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void SetClippingPlaneOff()
|
|||
|
|
{
|
|||
|
|
SetPlaneWS(new Plane());
|
|||
|
|
m_Master._INTERNAL_SetDynamicOcclusionCallback(GetShaderKeyword(), null);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void SetPlaneWS(Plane planeWS)
|
|||
|
|
{
|
|||
|
|
planeEquationWS = planeWS;
|
|||
|
|
|
|||
|
|
#if UNITY_EDITOR
|
|||
|
|
m_DebugPlaneLocal = planeWS;
|
|||
|
|
if (m_DebugPlaneLocal.IsValid())
|
|||
|
|
{
|
|||
|
|
float dist;
|
|||
|
|
if (m_DebugPlaneLocal.Raycast(new Ray(transform.position, m_Master.raycastGlobalForward), out dist))
|
|||
|
|
m_DebugPlaneLocal.distance = dist; // compute local distance
|
|||
|
|
}
|
|||
|
|
#endif
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#if UNITY_EDITOR
|
|||
|
|
void LateUpdate()
|
|||
|
|
{
|
|||
|
|
if (!Application.isPlaying)
|
|||
|
|
{
|
|||
|
|
// In Editor, process raycasts at each frame update
|
|||
|
|
if (!editorRaycastAtEachFrame)
|
|||
|
|
SetHitNull();
|
|||
|
|
else
|
|||
|
|
ProcessOcclusion(ProcessOcclusionSource.EditorUpdate);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
Plane m_DebugPlaneLocal;
|
|||
|
|
|
|||
|
|
void OnDrawGizmos()
|
|||
|
|
{
|
|||
|
|
if (!editorShowDebugPlane)
|
|||
|
|
return;
|
|||
|
|
|
|||
|
|
if (m_DebugPlaneLocal.IsValid())
|
|||
|
|
{
|
|||
|
|
var planePos = transform.position + m_DebugPlaneLocal.distance * m_Master.raycastGlobalForward;
|
|||
|
|
float planeDistNormalized = Mathf.Clamp01(Mathf.InverseLerp(0f, m_Master.raycastDistance, m_DebugPlaneLocal.distance));
|
|||
|
|
float planeSize = Mathf.Lerp(m_Master.coneRadiusStart, m_Master.coneRadiusEnd, planeDistNormalized);
|
|||
|
|
|
|||
|
|
var color = m_Master.ComputeColorAtDepth(planeDistNormalized).ComputeComplementaryColor(false);
|
|||
|
|
Utils.GizmosDrawPlane(
|
|||
|
|
m_DebugPlaneLocal.normal,
|
|||
|
|
planePos,
|
|||
|
|
color,
|
|||
|
|
Matrix4x4.identity,
|
|||
|
|
planeSize,
|
|||
|
|
planeSize * 0.5f);
|
|||
|
|
|
|||
|
|
UnityEditor.Handles.color = color;
|
|||
|
|
UnityEditor.Handles.DrawWireDisc(planePos,
|
|||
|
|
m_DebugPlaneLocal.normal,
|
|||
|
|
planeSize * (minSurfaceRatio * 2 - 1));
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
#endif
|
|||
|
|
}
|
|||
|
|
}
|