Hello , I’ve a shader effect that takes render texture from a video player component then use Graphics.Blit(source, destination, _material); .
I need to enable /disable the effect at runtime , unfortunately I can’t use ScriptableRenderPass andMonoBehaviour at the same time .
can someone please help me convert this into urp .
//vhsprocesseffect.cs
using UnityEngine;
using UnityEngine.Video;
using UnityEngine.UI;
namespace effect {
public class VHSPostProcessEffect : MonoBehaviour
{
public Shader shader;
public VideoClip VHSClip;
private float _yScanline;
private float _xScanline;
private Material _material = null;
private VideoPlayer _player;
//public bool rewinding = false;
private void OnEnable()
{
_material = new Material(shader);
_player = GetComponent<VideoPlayer>();
_player.isLooping = true;
_player.renderMode = VideoRenderMode.APIOnly;
_player.audioOutputMode = VideoAudioOutputMode.None;
_player.clip = VHSClip;
_player.Play();
}
void Start()
{
//
}
void OnRenderImage(RenderTexture source, RenderTexture destination)
{
_material.SetTexture("_VHSTex", _player.texture);
_yScanline += Time.deltaTime * 0.01f;
_xScanline -= Time.deltaTime * 0.1f;
if (_yScanline >= 1)
{
_yScanline = Random.value;
}
if (_xScanline <= 0 || Random.value < 0.05)
{
_xScanline = Random.value;
}
_material.SetFloat("_yScanline", _yScanline);
_material.SetFloat("_xScanline", _xScanline);
Graphics.Blit(source, destination, _material);
}
protected void OnDisable()
{
if (_material)
{
DestroyImmediate(_material);//
}
}
void update()
{
}
}
}
and here’s the shader
Shader "Hidden/VHSPostProcessEffect" {
Properties{
_MainTex("Base (RGB)", 2D) = "white" {}
_VHSTex("Base (RGB)", 2D) = "white" {}
}
SubShader{
Pass {
ZTest Always Cull Off ZWrite Off
Fog { Mode off }
CGPROGRAM
#pragma vertex vert_img
#pragma fragment frag
#pragma fragmentoption ARB_precision_hint_fastest
#include "UnityCG.cginc"
uniform sampler2D _MainTex;
uniform sampler2D _VHSTex;
float _yScanline;
float _xScanline;
float rand(float3 co) {
return frac(sin(dot(co.xyz ,float3(12.9898,78.233,45.5432))) * 43758.5453);
}
fixed4 frag(v2f_img i) : COLOR{
fixed4 vhs = tex2D(_VHSTex, i.uv);
float dx = 1 - abs(distance(i.uv.y, _xScanline));
float dy = 1 - abs(distance(i.uv.y, _yScanline));
//float x = ((int)(i.uv.x*320))/320.0;
dy = ((int)(dy * 15)) / 15.0;
dy = dy;
i.uv.x += dy * 0.025 + rand(float3(dy,dy,dy)).r / 500;//0.025;
float white = (vhs.r + vhs.g + vhs.b) / 3;
if (dx > 0.99)
i.uv.y = _xScanline;
//i.uv.y = step(0.99, dy) * (_yScanline) + step(dy, 0.99) * i.uv.y;
i.uv.x = i.uv.x % 1;
i.uv.y = i.uv.y % 1;
fixed4 c = tex2D(_MainTex, i.uv);
float bleed = tex2D(_MainTex, i.uv + float2(0.01, 0)).r;
bleed += tex2D(_MainTex, i.uv + float2(0.02, 0)).r;
bleed += tex2D(_MainTex, i.uv + float2(0.01, 0.01)).r;
bleed += tex2D(_MainTex, i.uv + float2(0.02, 0.02)).r;
bleed /= 6;
if (bleed > 0.1) {
vhs += fixed4(bleed * _xScanline, 0, 0, 0);
}
float x = ((int)(i.uv.x * 320)) / 320.0;
float y = ((int)(i.uv.y * 240)) / 240.0;
c -= rand(float3(x, y, _xScanline)) * _xScanline / 5;
return c + vhs;
}
ENDCG
}
}
Fallback off
}
I tried to use a library from github which convnert any material into render feature but
unfortunately it doesn’t affect sprites (it render at the background ) the original effect does applys for gui too .
also using render texture as overlay doesn’t looks good as it isn’t native post processing effect .
? but I didn’t set it up correctly ,