ToonLitSwaying.shader

// by Joyce @MinionsArt
// https://twitter.com/i/web/status/894576554411470848
// http://archive.is/avJyM
// https://pastebin.com/xLmcqPuP

Shader "Toon/Lit Swaying" {
    Properties {
        _Color ("Main Color", Color) = (0.5,0.5,0.5,1)
        _MainTex ("Base (RGB)", 2D) = "white" {}
        _Ramp ("Toon Ramp (RGB)", 2D) = "gray" {}
        _Speed ("MoveSpeed", Range(20,50)) = 25 // speed of the swaying
            _Rigidness("Rigidness", Range(1,50)) = 25 // lower makes it look more "liquid" higher makes it look rigid
        _SwayMax("Sway Max", Range(0, 0.1)) = .005 // how far the swaying goes
        _YOffset("Y offset", float) = 0.5// y offset, below this is no animation

    }

    SubShader {
        Tags { "RenderType"="Opaque" "DisableBatching" = "True" }// disable batching lets us keep object space
        LOD 200


CGPROGRAM
#pragma surface surf ToonRamp vertex:vert addshadow // addshadow applies shadow after vertex animation

sampler2D _Ramp;

// custom lighting function that uses a texture ramp based
// on angle between light direction and normal
#pragma lighting ToonRamp exclude_path:prepass
inline half4 LightingToonRamp (SurfaceOutput s, half3 lightDir, half atten)
{
    #ifndef USING_DIRECTIONAL_LIGHT
    lightDir = normalize(lightDir);
    #endif

    half d = dot (s.Normal, lightDir)*0.5 + 0.5;
    half3 ramp = tex2D (_Ramp, float2(d,d)).rgb;

    half4 c;
    c.rgb = s.Albedo * _LightColor0.rgb * ramp * (atten * 2);
    c.a = 0;
    return c;
}


sampler2D _MainTex;
float4 _Color;

float _Speed;
float _SwayMax;
float _YOffset;
float _Rigidness;


struct Input {
    float2 uv_MainTex : TEXCOORD0;
};
void vert(inout appdata_full v)//
{
    float3 wpos = mul(unity_ObjectToWorld, v.vertex).xyz;// world position
    float x = sin(wpos.x / _Rigidness + (_Time.x * _Speed)) *(v.vertex.y - _YOffset) * 5;// x axis movements
    float z = sin(wpos.z / _Rigidness + (_Time.x * _Speed)) *(v.vertex.y - _YOffset) * 5;// z axis movements
    v.vertex.x += step(0,v.vertex.y - _YOffset) * x * _SwayMax;// apply the movement if the vertex's y above the YOffset
    v.vertex.z += step(0,v.vertex.y - _YOffset) * z * _SwayMax;

}

void surf (Input IN, inout SurfaceOutput o) {
    half4 c = tex2D(_MainTex, IN.uv_MainTex) * _Color;
    o.Albedo = c.rgb;
    o.Alpha = c.a;
}
ENDCG

    }

    Fallback "Diffuse"
}