332 lines
9.2 KiB
C#
332 lines
9.2 KiB
C#
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using System;
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using UnityEditor;
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namespace UnityEngine.Rendering.Universal
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{
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/// <summary>The scaling mode to apply to decals that use the Decal Projector.</summary>
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public enum DecalScaleMode
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{
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/// <summary>Ignores the transformation hierarchy and uses the scale values in the Decal Projector component directly.</summary>
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ScaleInvariant,
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/// <summary>Multiplies the lossy scale of the Transform with the Decal Projector's own scale then applies this to the decal.</summary>
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[InspectorName("Inherit from Hierarchy")]
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InheritFromHierarchy,
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}
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/// <summary>
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/// Decal Projector component.
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/// </summary>
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[ExecuteAlways]
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#if UNITY_EDITOR
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[CanEditMultipleObjects]
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#endif
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[AddComponentMenu("Rendering/URP Decal Projector")]
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public class DecalProjector : MonoBehaviour
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{
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internal delegate void DecalProjectorAction(DecalProjector decalProjector);
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internal static event DecalProjectorAction onDecalAdd;
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internal static event DecalProjectorAction onDecalRemove;
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internal static event DecalProjectorAction onDecalPropertyChange;
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internal static event DecalProjectorAction onDecalMaterialChange;
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internal static Material defaultMaterial { get; set; }
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internal static bool isSupported => onDecalAdd != null;
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internal DecalEntity decalEntity { get; set; }
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[SerializeField]
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private Material m_Material = null;
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/// <summary>
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/// The material used by the decal.
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/// </summary>
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public Material material
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{
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get
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{
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return m_Material;
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}
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set
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{
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m_Material = value;
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OnValidate();
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}
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}
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[SerializeField]
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private float m_DrawDistance = 1000.0f;
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/// <summary>
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/// Distance from camera at which the Decal is not rendered anymore.
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/// </summary>
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public float drawDistance
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{
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get
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{
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return m_DrawDistance;
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}
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set
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{
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m_DrawDistance = Mathf.Max(0f, value);
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OnValidate();
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}
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}
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[SerializeField]
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[Range(0, 1)]
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private float m_FadeScale = 0.9f;
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/// <summary>
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/// Percent of the distance from the camera at which this Decal start to fade off.
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/// </summary>
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public float fadeScale
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{
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get
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{
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return m_FadeScale;
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}
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set
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{
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m_FadeScale = Mathf.Clamp01(value);
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OnValidate();
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}
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}
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[SerializeField]
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[Range(0, 180)]
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private float m_StartAngleFade = 180.0f;
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/// <summary>
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/// Angle between decal backward orientation and vertex normal of receiving surface at which the Decal start to fade off.
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/// </summary>
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public float startAngleFade
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{
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get
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{
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return m_StartAngleFade;
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}
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set
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{
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m_StartAngleFade = Mathf.Clamp(value, 0.0f, 180.0f);
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OnValidate();
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}
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}
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[SerializeField]
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[Range(0, 180)]
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private float m_EndAngleFade = 180.0f;
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/// <summary>
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/// Angle between decal backward orientation and vertex normal of receiving surface at which the Decal end to fade off.
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/// </summary>
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public float endAngleFade
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{
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get
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{
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return m_EndAngleFade;
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}
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set
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{
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m_EndAngleFade = Mathf.Clamp(value, m_StartAngleFade, 180.0f);
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OnValidate();
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}
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}
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[SerializeField]
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private Vector2 m_UVScale = new Vector2(1, 1);
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/// <summary>
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/// Tilling of the UV of the projected texture.
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/// </summary>
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public Vector2 uvScale
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{
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get
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{
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return m_UVScale;
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}
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set
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{
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m_UVScale = value;
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OnValidate();
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}
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}
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[SerializeField]
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private Vector2 m_UVBias = new Vector2(0, 0);
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/// <summary>
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/// Offset of the UV of the projected texture.
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/// </summary>
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public Vector2 uvBias
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{
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get
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{
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return m_UVBias;
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}
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set
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{
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m_UVBias = value;
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OnValidate();
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}
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}
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[SerializeField]
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private DecalScaleMode m_ScaleMode = DecalScaleMode.ScaleInvariant;
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/// <summary>
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/// The scaling mode to apply to decals that use this Decal Projector.
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/// </summary>
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public DecalScaleMode scaleMode
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{
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get => m_ScaleMode;
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set
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{
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m_ScaleMode = value;
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OnValidate();
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}
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}
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[SerializeField]
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internal Vector3 m_Offset = new Vector3(0, 0, 0.5f);
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/// <summary>
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/// Change the offset position.
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/// Do not expose: Could be changed by the inspector when manipulating the gizmo.
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/// </summary>
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public Vector3 pivot
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{
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get
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{
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return m_Offset;
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}
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set
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{
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m_Offset = value;
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OnValidate();
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}
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}
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[SerializeField]
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internal Vector3 m_Size = new Vector3(1, 1, 1);
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/// <summary>
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/// The size of the projection volume.
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/// </summary>
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public Vector3 size
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{
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get
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{
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return m_Size;
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}
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set
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{
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m_Size = value;
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OnValidate();
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}
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}
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[SerializeField]
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[Range(0, 1)]
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private float m_FadeFactor = 1.0f;
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/// <summary>
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/// Controls the transparency of the decal.
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/// </summary>
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public float fadeFactor
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{
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get
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{
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return m_FadeFactor;
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}
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set
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{
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m_FadeFactor = Mathf.Clamp01(value);
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OnValidate();
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}
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}
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private Material m_OldMaterial = null;
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/// <summary>A scale that should be used for rendering and handles.</summary>
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internal Vector3 effectiveScale => m_ScaleMode == DecalScaleMode.InheritFromHierarchy ? transform.lossyScale : Vector3.one;
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/// <summary>current size in a way the DecalSystem will be able to use it</summary>
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internal Vector3 decalSize => new Vector3(m_Size.x, m_Size.z, m_Size.y);
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/// <summary>current size in a way the DecalSystem will be able to use it</summary>
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internal Vector3 decalOffset => new Vector3(m_Offset.x, -m_Offset.z, m_Offset.y);
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/// <summary>current uv parameters in a way the DecalSystem will be able to use it</summary>
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internal Vector4 uvScaleBias => new Vector4(m_UVScale.x, m_UVScale.y, m_UVBias.x, m_UVBias.y);
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void InitMaterial()
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{
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if (m_Material == null)
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{
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#if UNITY_EDITOR
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m_Material = defaultMaterial;
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#endif
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}
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}
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void OnEnable()
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{
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InitMaterial();
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m_OldMaterial = m_Material;
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onDecalAdd?.Invoke(this);
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#if UNITY_EDITOR
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// Handle scene visibility
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UnityEditor.SceneVisibilityManager.visibilityChanged += UpdateDecalVisibility;
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#endif
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}
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#if UNITY_EDITOR
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void UpdateDecalVisibility()
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{
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// Fade out the decal when it is hidden by the scene visibility
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if (UnityEditor.SceneVisibilityManager.instance.IsHidden(gameObject))
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{
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onDecalRemove?.Invoke(this);
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}
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else
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{
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onDecalAdd?.Invoke(this);
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onDecalPropertyChange?.Invoke(this); // Scene culling mask may have changed.
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}
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}
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#endif
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void OnDisable()
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{
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onDecalRemove?.Invoke(this);
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#if UNITY_EDITOR
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UnityEditor.SceneVisibilityManager.visibilityChanged -= UpdateDecalVisibility;
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#endif
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}
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internal void OnValidate()
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{
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if (!isActiveAndEnabled)
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return;
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if (m_Material != m_OldMaterial)
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{
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onDecalMaterialChange?.Invoke(this);
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m_OldMaterial = m_Material;
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}
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else
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onDecalPropertyChange?.Invoke(this);
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}
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public bool IsValid()
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{
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if (material == null)
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return false;
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if (material.FindPass(DecalShaderPassNames.DBufferProjector) != -1)
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return true;
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if (material.FindPass(DecalShaderPassNames.DecalProjectorForwardEmissive) != -1)
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return true;
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if (material.FindPass(DecalShaderPassNames.DecalScreenSpaceProjector) != -1)
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return true;
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if (material.FindPass(DecalShaderPassNames.DecalGBufferProjector) != -1)
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return true;
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return false;
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}
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}
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}
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