XRay Shader 2017

XRay2017.shader

// xray mouse pos shader test v2.0 - mgear - http://unitycoder.com/blog

Shader "UnityLibrary/Effects/XRay2017"
{
	Properties 
	{
		_MainTex ("Base (RGB)", 2D) = "white" {}
		_ObjPos ("ObjPos", Vector) = (1,1,1,1)
		_Cutoff ("Alpha cutoff", Range(0,1)) = 0.5
		_Radius ("HoleRadius", Range(0.1,5)) = 2
	}
	SubShader 
	{
		Tags {"Queue"="AlphaTest" "IgnoreProjector"="True" "RenderType"="TransparentCutout"}
		LOD 100

		Cull Off // draw backfaces also, comment this line if no need for backfaces
		
		CGPROGRAM
		#pragma surface surf Lambert alphatest:_Cutoff

		struct Input 
		{
			float2 uv_MainTex;
			float3 worldPos;
		};
		
		sampler2D _MainTex;
		uniform float4 _ObjPos;
		uniform float _Radius;

		void surf (Input IN, inout SurfaceOutput o) 
		{
			half3 col = tex2D (_MainTex, IN.uv_MainTex).rgb;
			float dx = length(_ObjPos.x-IN.worldPos.x);
			float dy = length(_ObjPos.y-IN.worldPos.y);
			float dz = length(_ObjPos.z-IN.worldPos.z);
			float dist = (dx*dx+dy*dy+dz*dz)*_Radius;
			dist = clamp(dist,0,1);
			o.Albedo = col; // color is from texture
			o.Alpha = dist;  // alpha is from distance to the mouse
		}
		ENDCG
	} 
	FallBack "Diffuse"
}

Thanks for making this shader. I have ported the Javascript file to C# if you want to add it - works fine in Unity 2019.4

// update object position to shader v1.0 - mgear - http://unitycoder.com/blog

using UnityEngine;

public class MousePos2Shader : MonoBehaviour
{
private float radius = 2;
private RaycastHit hit;
private Ray ray;

void Update ()
{
// get mouse pos
ray = Camera.main.ScreenPointToRay(Input.mousePosition);

if (Physics.Raycast(ray, out hit, Mathf.Infinity)) 
{
	GetComponent<Renderer>().material.SetVector("_ObjPos", new Vector4(hit.point.x,hit.point.y,hit.point.z,0));
}

// box rotation for testing
if (Input.GetKey ("a"))
{
	transform.Rotate(new Vector3(0,30,0) * Time.deltaTime);
}
if (Input.GetKey ("d"))
{
	transform.Rotate(new Vector3(0,-30,0) * Time.deltaTime);
}

// mousewheel for radius
if (Input.GetAxis("Mouse ScrollWheel")!=0)
{
	radius += (float) Input.GetAxis("Mouse ScrollWheel")*0.8f;
	GetComponent<Renderer>().material.SetFloat( "_Radius", radius);
}

}
}