3d texture + slit-scan

slitscan with 3d texture

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class slitscan3d : MonoBehaviour
{
    public RenderTexture _rt3d;
    public Material _mat;
    private WebCamTexture _tex;
    private int _index=0;

    void Start()
    {

        Application.targetFrameRate=60;
        WebCamDevice[] devices = WebCamTexture.devices;
        _tex = new WebCamTexture(devices[1].name, 960, 540, 30);
        _tex.Play();

        var info = new RenderTextureDescriptor();

        info.dimension=UnityEngine.Rendering.TextureDimension.Tex3D;
        info.colorFormat = RenderTextureFormat.ARGB32;
        info.width = 512;
        info.height=256;        
        info.volumeDepth=90;
        info.depthBufferBits = 0;
        info.msaaSamples = 1;
        info.mipCount=0;

        _rt3d=new RenderTexture(info);
        _rt3d.name="TEST3DTEX";
        _rt3d.Create();

    }

    // Update is called once per frame
    void Update()
    {

        for(int i=_rt3d.volumeDepth-1;i>=1;i--){
            Graphics.CopyTexture(_rt3d,i-1,_rt3d,i);
        }
        
        Graphics.Blit(_tex,_rt3d,0,0);
        _mat.SetTexture("_Volume",_rt3d);

    }
}

Shader "VolumeRender/Tex3d"
{

Properties
{
    _Volume("Volume", 3D) = "" {}
    _Depth("_Depth",Range(0,10)) = 0
    _Brightness("_Brightness",Range(0,1)) = 1
}

CGINCLUDE

#include "UnityCG.cginc"

struct appdata
{
    float4 vertex : POSITION;
};

struct v2f
{
    float4 vertex : SV_POSITION;
    float3 uv : TEXCOORD0;
};

sampler3D _Volume;
float _Depth;
float _GlobalBrightness;
float _Brightness;

v2f vert(appdata v)
{
    v2f o;

    o.vertex = UnityObjectToClipPos(v.vertex);

    float4 wpos = mul(unity_ObjectToWorld, v.vertex);
    
    //-0 to 1
    o.uv.x = wpos.x * 0.5 + 0.5;
    o.uv.y = 1-(wpos.y * 0.5 + 0.5);
    o.uv.z = wpos.z * 0.5 + 0.5;
    //o.uv.z = wpos.z * 0.5 + 0.5;

    return o;
}

fixed4 frag(v2f i) : SV_Target
{
    //i.uv.z *= _Depth;
    //i.uv.z = saturate( i.uv.z )*0.99;
    return tex3D(_Volume, (i.uv) )*_Brightness;
}

ENDCG

SubShader
{

Tags 
{ 
    "RenderType"="Opaque" 
}

Pass
{
    CGPROGRAM
    #pragma vertex vert
    #pragma fragment frag
    ENDCG
}

}

}