[Unity Shaders] map and character occlusion processing

[Unity Shaders] map and character occlusion processing

The first method:
Methods of radiographic Inspection
Idea: Make a ray between the main camera and the character, if the wall on the map obscures the character model, this ray must be
Walls intersect. The wall's material is set to a transparent material after the intersection is detected. Implements the display of masked characters.
Not much nonsense to say on the picture:

When doing the ray, the ray is very easy and the character intersects, therefore must add a judgment the tags,

Release the code below

The/** Ray detects the colliding body between the camera and the player, setting the transparent material */using System.Collections;
Using System.Collections.Generic;

Using Unityengine;
    public class Raytest:monobehaviour {public Camera playercamera;
    Public Material Blendmat;

    Public Material Commonmat;
        Private Transform Playerpos {get {return gameobject.getcomponent<transform> ();

    }} private Gameobject Blendwall;

        Use the For initialization void Start () {}//update is called once per frame void update () {

        var direction = playerpos.position-playercamera.transform.position;

        Raycasthit hit; if (Physics.raycast (PlayerCamera.transform.position, vector3.normalize (direction), out hit, Vector3.magnitude ( direction)) {if (Hit.collider.tag = = "Wall") {Debug.drawline (playercame
                Ra.transform.position, Hit.point, color.red);
  Blendwall = Hit.collider.gameObject;              Blendwall.getcomponent<renderer> (). material = Blendmat;
            Return
    }} if (Blendwall! = null) blendwall.getcomponent<renderer> (). material = Commonmat; }
}

Result screenshot

* Second Method *
Methods for drawing using Ztest
Ideas:
Modify the rendering order of the people and place the rendering of the characters behind the wall.

Tags {"Queue" = "transparent+5"}

No occlusion part zwrite on ZTest lequal
Partially occluded ZTest Greater Lighting off Zwrite off

If the wall is transparent, you must ensure that the wall's depth cache is written.

Pass
{
    zwrite on
    colormask 0
}

Also make a pass to write the depth cache
Release part of the code:

Pass
        {
            offset-50,0

            ZTest Greater 
            Lighting off
            zwrite off

            Blend srcalpha Oneminussrcalpha

            cgprogram
            #pragma vertex vertblend
            #pragma fragment fragblend

            ENDCG
        }

        Pass 
        {
            Zwrite on
            ZTest lequal

            cgprogram
            #pragma vertex vert
            #pragma fragment frag

            ENDCG
        }

My second method is mainly referring to this article