using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class EdgeDetectNormalAndDepth : PostEffectBase
{
[SerializeField] private Shader _edgeSgader;
private Material _edgeMaterial;
[Range(0f, 1f)]
public float edgeOnly = 0f;
public Color edgeColor = Color.black;
public Color backgroundColor = Color.white;
public float sampleDistance = 1.0f;
public float sensitivityDepth = 1.0f;
public float sensitivityNormal = 1.0f;
private void OnEnable()
{
GetComponent<Camera>().depthTextureMode |= DepthTextureMode.DepthNormals;
}
public Material EdgeMaterial
{
get
{
_edgeMaterial = CheckShaderAndCreateMaterial(_edgeSgader, _edgeMaterial);
return _edgeMaterial;
}
}
private void OnRenderImage(RenderTexture src, RenderTexture dest)
{
if (EdgeMaterial != null)
{
EdgeMaterial.SetFloat("_EdgeOnly", edgeOnly);
EdgeMaterial.SetColor("_EdgeColor", edgeColor);
EdgeMaterial.SetColor("_BackgroundColor", backgroundColor);
EdgeMaterial.SetFloat("_SampleDistance", sampleDistance);
EdgeMaterial.SetVector("_Sensitivity", new Vector4(sensitivityNormal, sensitivityDepth, 0f, 0f));
Graphics.Blit(src, dest, EdgeMaterial);
}
else
{
Graphics.Blit(src, dest);
}
}
}
Shader "Hidden/EdgeDetectNormalAndDepth"
{
Properties
{
_MainTex ("Texture", 2D) = "white" {
}
_EdgeOnly ("Edge Only", Float) = 1.0
_EdgeColor ("Edge Color", Color) = (0, 0, 0, 1)
_BackgroundColor ("Background Color", Color) = (1, 1, 1, 1)
_SampleDistance ("Sample Distance", Float) = 1.0
_Sensitivity ("Sensitivity", Vector) = (1, 1, 1, 1)
}
SubShader
{
CGINCLUDE
#include "UnityCG.cginc"
sampler2D _MainTex;
half4 _MainTex_TexelSize;
sampler2D _CameraDepthNormalsTexture;
float _EdgeOnly;
fixed4 _EdgeColor;
fixed4 _BackgroundColor;
float _SampleDistance;
half4 _Sensitivity;
struct a2v
{
float4 vertex : POSITION;
float2 uv : TEXCOORD0;
};
struct v2f
{
float4 pos : SV_POSITION;
float2 uv[5] : TEXCOORD0;
};
v2f vert (a2v v)
{
v2f o;
o.pos = UnityObjectToClipPos(v.vertex);
half2 uv = v.uv;
o.uv[0] = uv;
#if UNITY_UV_STARTS_AT_TOP
if (_MainTex_TexelSize.y < 0)
uv.y = 1 - uv.y;
#endif
o.uv[1] = uv + _MainTex_TexelSize.xy * half2(-1, 1) * _SampleDistance;
o.uv[2] = uv + _MainTex_TexelSize.xy * half2(1, -1) * _SampleDistance;
o.uv[3] = uv + _MainTex_TexelSize.xy * half2(1, 1) * _SampleDistance;
o.uv[4] = uv + _MainTex_TexelSize.xy * half2(-1, -1) * _SampleDistance;
return o;
}
half CheckSame(half4 center, half4 sample)
{
half2 centerNormal = center.xy;
float centerDepth = DecodeFloatRG(center.zw);
half2 sampleNormal = sample.xy;
float sampleDepth = DecodeFloatRG(sample.zw);
half2 diffNormal = abs(centerNormal - sampleNormal) * _Sensitivity.x;
int isSameNormal = (diffNormal.x + diffNormal.y) < 0.1;
float diffDepth = abs(centerDepth - sampleDepth) * _Sensitivity.y;
int isSameDepth = diffDepth < 0.1 * centerDepth;
return isSameNormal * isSameDepth ? 1.0 : 0.0;
}
fixed4 frag (v2f i) : SV_Target
{
half4 sample1 = tex2D(_CameraDepthNormalsTexture, i.uv[1]);
half4 sample2 = tex2D(_CameraDepthNormalsTexture, i.uv[2]);
half4 sample3 = tex2D(_CameraDepthNormalsTexture, i.uv[3]);
half4 sample4 = tex2D(_CameraDepthNormalsTexture, i.uv[4]);
half edge = 1.0;
edge *= CheckSame(sample1, sample2);
edge *= CheckSame(sample3, sample4);
fixed4 withEdgeColor = lerp(_EdgeColor, tex2D(_MainTex, i.uv[0]), edge);
fixed4 onlyEdgeColor = lerp(_EdgeColor, _BackgroundColor, edge);
return lerp(withEdgeColor, onlyEdgeColor, _EdgeOnly);
}
ENDCG
Pass
{
Cull Off ZWrite Off ZTest Always
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
ENDCG
}
}
}