using?UnityEngine;
using?System.Collections;

[ExecuteInEditMode]
public?class?DepthOfFiled?:?PostEffectbase
{

????[Range（0.0f?100.0f）]
????public?float?focalDistance?=?10.0f;
????[Range（0.0f?100.0f）]
????public?float?nearBlurScale?=?0.0f;
????[Range（0.0f?1000.0f）]
????public?float?farBlurScale?=?50.0f;
????//分辨率
????public?int?downSample?=?1;
????//采樣率
????public?int?samplerScale?=?1;

????private?Camera?_mainCam?=?null;
????public?Camera?MainCam
????{
????????get
????????{
????????????if?（_mainCam?==?null）
????????????????_mainCam?=?GetComponent（）;
????????????return?_mainCam;
????????}
????}

????void?OnEnable（）
????{
????????//maincam的depthTextureMode是通過(guò)位運(yùn)算開(kāi)啟與關(guān)閉的
????????MainCam.depthTextureMode?|=?DepthTextureMode.Depth;
????}

????void?OnDisable（）
????{
????????MainCam.depthTextureMode?&=?~DepthTextureMode.Depth;
????}

????void?OnRenderImage（RenderTexture?source?RenderTexture?destination）
????{
????????if?（_Material）
????????{
????????????//首先將我們?cè)O(shè)置的焦點(diǎn)限制在遠(yuǎn)近裁剪面之間
????????????Mathf.Clamp（focalDistance?MainCam.nearClipPlane?MainCam.farClipPlane）;

????????????//申請(qǐng)兩塊RT，并且分辨率按照downSameple降低
????????????RenderTexture?temp1?=?RenderTexture.GetTemporary（source.width?>>?downSample?source.height?>>?downSample?0?source.format）;
????????????RenderTexture?temp2?=?RenderTexture.GetTemporary（source.width?>>?downSample?source.height?>>?downSample?0?source.format）;

????????????//直接將場(chǎng)景圖拷貝到低分辨率的RT上達(dá)到降分辨率的效果
????????????Graphics.Blit（source?temp1）;

????????????//高斯模糊，兩次模糊，橫向縱向，使用pass0進(jìn)行高斯模糊
????????????_Material.SetVector（“_offsets“?new?Vector4（0?samplerScale?0?0））;
????????????Graphics.Blit（temp1?temp2?_Material?0）;
????????????_Material.SetVector（“_offsets“?new?Vector4（samplerScale?0?0?0））;
????????????Graphics.Blit（temp2?temp1?_Material?0）;

????????????//景深操作，景深需要兩的模糊效果圖我們通過(guò)_BlurTex變量傳入shader
????????????_Material.SetTexture（“_BlurTex“?temp1）;
????????????//設(shè)置shader的參數(shù)，主要是焦點(diǎn)和遠(yuǎn)近模糊的權(quán)重，權(quán)重可以控制插值時(shí)使用模糊圖片的權(quán)重
????????????_Material.SetFloat（“_focalDistance“?FocalDistance01（focalDistance））;
????????????_Material.SetFloat（“_nearBlurScale“?nearBlurScale）;
????????????_Material.SetFloat（“_farBlurScale“?farBlurScale）;

????????????//使用pass1進(jìn)行景深效果計(jì)算，清晰場(chǎng)景圖直接從source輸入到shader的_MainTex中
????????????Graphics.Blit（source?destination?_Material?1）;

????????????//釋放申請(qǐng)的RT
????????????RenderTexture.ReleaseTemporary（temp1）;
????????????RenderTexture.ReleaseTemporary（temp2）;
????????}
????}

????//計(jì)算設(shè)置的焦點(diǎn)被轉(zhuǎn)換到01空間中的距離，以便shader中通過(guò)這個(gè)01空間的焦點(diǎn)距離與depth比較
????private?float?FocalDistance01（float?distance）
????{
????????return?MainCam.WorldToViewportPoint（（distance?-?MainCam.nearClipPlane）?*?MainCam.transform.forward?+?MainCam.transform.position）.z?/?（MainCam.farClipPlane?-?MainCam.nearClipPlane）;
????}


}

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2020-01-11?10:59??景深效果\
?????文件????????4222??2020-01-11?10:40??景深效果\DepthOfField.shader
?????文件????????3292??2020-01-11?10:40??景深效果\DepthOfFiled.cs
?????文件????????1158??2020-01-11?10:42??景深效果\PostEffectbase.cs