373 lines
11 KiB
C#
373 lines
11 KiB
C#
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using UnityEngine;
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using System.Collections;
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using System.Collections.Generic;
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using Thousandto.Launcher.ExternalLibs;
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/// <summary>
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/// 创建一个产生实时阴影贴图的脚本
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/// </summary>
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public class ShadowMapScript : MonoBehaviour
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{
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#region 常量定义
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private const int CN_RESIZE_WIDTH = 1024;
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private const int CN_RTSIZE_HEIGHT = 1024;
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private const string DefaultShadowKeyWords = "_GONBEST_SHADOW_ON";
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#endregion
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#region 私有变量
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//是否支持阴影
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private bool _supportShadow = false;
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//支持的阴影贴图模式
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private RenderTextureFormat _texFormat = RenderTextureFormat.ARGB32;
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//阴影贴图深度值
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private int _texDepth = 0;
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//阴影开关
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private bool _isEnable = false;
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//阴影摄像机
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private Camera _shadowMapCamera = null;
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//矩阵
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private Matrix4x4 _shadowViewProj = Matrix4x4.zero;
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//阴影贴图
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private RenderTexture _shadownMap = null;
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//阴影shader
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private Shader _depthShader = null;
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//摄像机裁剪层
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[SerializeField]
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private LayerMask _Cameralayer = 1 << 28;
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//可接受阴影的render
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[SerializeField]
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private Renderer[] _shadowRenderers = null;
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//阴影强度
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[SerializeField]
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private float _shadowStrength = 0.7f;
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//阴影视口大小
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[SerializeField]
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private float _viewPortSize = 3;
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//是否使用深度处理
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[SerializeField]
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private bool _useDepth = false;
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//是否需要刷新
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[SerializeField]
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private bool _refresh = false;
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#endregion
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#region //重载MonoBehaviour的系统函数
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// Use this for initialization
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void Awake()
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{
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//1.初始化
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ResetShadowShaderParam();
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//2.判断是否支持阴影
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CheckSupportShadow();
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//3.刷新摄像机
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RefreshCamera();
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}
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private void OnEnable()
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{
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EnableEx();
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RefreshCamera();
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}
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private void OnDisable()
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{
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DisableEx();
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}
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// Update is called once per frame
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void Update()
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{
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if (_refresh)
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{
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_refresh = false;
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if (_shadowMapCamera != null)
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{
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if (_useDepth)
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{
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_depthShader = ShaderFactory.Find("Ares/SpecialEffect/MakeShadow_Depth");
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if (_depthShader == null)
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{
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Debug.LogError("阴影不生效,因为没有找到Shader:Ares/SpecialEffect/MakeShadow_Depth");
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}
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}
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else
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{
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_depthShader = ShaderFactory.Find("Ares/SpecialEffect/MakeShadow");
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if (_depthShader == null)
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{
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Debug.LogError("阴影不生效,因为没有找到Shader:Ares/SpecialEffect/MakeShadow");
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}
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}
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_shadowMapCamera.SetReplacementShader(_depthShader, "RenderType");
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}
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}
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this.Render();
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}
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private void OnValidate()
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{
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RefreshCamera();
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}
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private void OnDestroy()
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{
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ResetMaterial();
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ReleaseRenderTexture();
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if (_shadowMapCamera != null)
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{
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_shadowMapCamera.enabled = false;
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}
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}
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#endregion
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//刷新摄像机的值
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private void RefreshCamera()
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{
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if (!_supportShadow)
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return;
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if (_shadowMapCamera == null)
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{
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_shadowMapCamera = gameObject.GetComponent<Camera>();
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_shadowMapCamera.clearFlags = CameraClearFlags.Color;
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_shadowMapCamera.backgroundColor = Color.black;
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_shadowMapCamera.depth = -10f;
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_shadowMapCamera.useOcclusionCulling = false;
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_shadowMapCamera.orthographic = true;
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_shadowMapCamera.enabled = true;
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if (_useDepth)
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{
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_depthShader = ShaderFactory.Find("Ares/SpecialEffect/MakeShadow_Depth");
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}
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else
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{
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_depthShader = ShaderFactory.Find("Ares/SpecialEffect/MakeShadow");
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}
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if (_depthShader == null)
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{
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Debug.LogError("阴影不生效,因为没有找到Shader:Ares/SpecialEffect/MakeShadow");
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}
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_shadowMapCamera.SetReplacementShader(_depthShader, "RenderType");
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;
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}
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if (_shadowMapCamera != null)
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{
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_shadowMapCamera.cullingMask = _Cameralayer;
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_shadowMapCamera.orthographicSize = _viewPortSize;
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}
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}
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//创建RenderTexture
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private void CreateRenderTexture()
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{
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if (!_supportShadow)
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return;
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ReleaseRenderTexture();
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if (!_useDepth) _texDepth = 0;
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_shadownMap = RenderTexture.GetTemporary(CN_RESIZE_WIDTH, CN_RTSIZE_HEIGHT, _texDepth, _texFormat);
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_shadownMap.name = "RenderTexture86";
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_shadownMap.wrapMode = TextureWrapMode.Clamp;
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if (_shadownMap.format != _texFormat)
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{
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_shadownMap.format = _texFormat;
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}
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_shadownMap.filterMode = FilterMode.Bilinear;
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_shadownMap.antiAliasing = 1;
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Graphics.Blit(Texture2D.blackTexture, _shadownMap);
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_shadowMapCamera.targetTexture = _shadownMap;
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_shadowMapCamera.RenderWithShader(_depthShader, "RenderType");
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}
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//释放RenderTexture
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private void ReleaseRenderTexture()
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{
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if (_shadownMap != null)
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{
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RenderTexture.ReleaseTemporary(_shadownMap);
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_shadownMap = null;
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}
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if (_shadowMapCamera != null)
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_shadowMapCamera.targetTexture = null;
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}
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//判断是否支持阴影
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private bool CheckSupportShadow()
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{
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_supportShadow = true;
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if (_useDepth)
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{
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if (SystemInfo.SupportsRenderTextureFormat(RenderTextureFormat.ARGB32))
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{
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_texFormat = RenderTextureFormat.ARGB32;
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}
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else
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{
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_supportShadow = false;
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Debug.LogError("阴影不生效,因为当前设备不支持RenderTexture的图片格式!");
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}
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}
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else
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{
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if (SystemInfo.SupportsRenderTextureFormat(RenderTextureFormat.RGB565))
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{
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_texFormat = RenderTextureFormat.RGB565;
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}
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else if (SystemInfo.SupportsRenderTextureFormat(RenderTextureFormat.ARGB4444))
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{
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_texFormat = RenderTextureFormat.ARGB4444;
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}
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else if (SystemInfo.SupportsRenderTextureFormat(RenderTextureFormat.ARGB1555))
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{
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_texFormat = RenderTextureFormat.ARGB1555;
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}
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else if (SystemInfo.SupportsRenderTextureFormat(RenderTextureFormat.ARGB32))
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{
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_texFormat = RenderTextureFormat.ARGB32;
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}
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else
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{
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_supportShadow = false;
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Debug.LogError("阴影不生效,因为当前设备不支持RenderTexture的图片格式!");
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}
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}
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return _supportShadow;
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}
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//实时获取阴影摄像机的数据,并为Shader所需传递参数
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public void Render()
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{
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if (!_supportShadow)
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return;
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if (!_isEnable)
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return;
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if (_depthShader == null)
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return;
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if (_shadowMapCamera == null)
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return;
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Matrix4x4 proj = _shadowMapCamera.projectionMatrix;
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Matrix4x4 view = _shadowMapCamera.worldToCameraMatrix;
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proj = GL.GetGPUProjectionMatrix(_shadowMapCamera.projectionMatrix, true);
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if (_shadowRenderers != null)
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{
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for (int i = 0; i < _shadowRenderers.Length; ++i)
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{
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var render = _shadowRenderers[i];
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if (render != null && render.sharedMaterial != null)
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{
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render.sharedMaterial.SetMatrix("_MyWorld2ShadowProj", proj * view);
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render.sharedMaterial.SetTexture("_MyShadowMap", _shadownMap);
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render.sharedMaterial.SetFloat("_ShadowIntensity", _shadowStrength);
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}
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}
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}
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}
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//开启阴影
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private void EnableEx()
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{
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_isEnable = true;
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if (!_supportShadow) return;
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ResetShadowShaderParam();
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if (_shadowMapCamera != null)
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_shadowMapCamera.enabled = true;
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CreateRenderTexture();
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if (_shadowRenderers != null)
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{
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for (int i = 0; i < _shadowRenderers.Length; ++i)
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{
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var render = _shadowRenderers[i];
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if (render != null && render.sharedMaterial != null)
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{
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//Debug.LogError("Eanble:"+ render.name);
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render.sharedMaterial.EnableKeyword(DefaultShadowKeyWords);
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}
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}
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}
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}
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//关闭阴影
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private void DisableEx()
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{
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_isEnable = false;
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if (!_supportShadow) return;
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ResetShadowShaderParam();
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if (_shadowMapCamera != null)
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_shadowMapCamera.enabled = false;
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ReleaseRenderTexture();
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if (_shadowRenderers != null)
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{
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for (int i = 0; i < _shadowRenderers.Length; ++i)
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{
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var render = _shadowRenderers[i];
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if (render != null && render.sharedMaterial != null)
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{
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//Debug.LogError("Disable:" + render.name);
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render.sharedMaterial.DisableKeyword(DefaultShadowKeyWords);
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}
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}
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}
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}
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//重置一下阴影的shader参数
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private void ResetShadowShaderParam()
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{
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if (_shadowRenderers != null)
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{
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for (int i = 0; i < _shadowRenderers.Length; ++i)
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{
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var render = _shadowRenderers[i];
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if (render != null && render.sharedMaterial != null)
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{
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render.sharedMaterial.SetTexture("_MyShadowMap", Texture2D.blackTexture);
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render.sharedMaterial.SetFloat("_ShadowIntensity", 1);
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}
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}
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}
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}
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//重置一下阴影的shader参数
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private void ResetMaterial()
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{
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if (_shadowRenderers != null)
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{
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for (int i = 0; i < _shadowRenderers.Length; ++i)
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{
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var render = _shadowRenderers[i];
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if (render != null && render.sharedMaterial != null)
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{
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render.sharedMaterial.shader = render.sharedMaterial.shader;
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}
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}
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}
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}
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}
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