ParinNoise
#include "UnityCG.cginc"
float4 permute(float4 x){
return fmod(34.0 * pow(x, 2) + x, 289.0);
}
float2 fade(float2 t){
return 6.0 * pow(t, 5.0) - 15.0 * pow(t, 4.0) + 10.0 * pow(t, 3.0);
}
float4 taylorInvSqrt(float4 r) {
return 1.79284291400159 - 0.85373472095314 * r;
}
#define DIV_289 0.0034602076124567474048442906
float mod289(float x) {
return x - floor(x * DIV_289) * 289.0;
}
float PerlinNoise2D(float2 P){
float4 Pi = floor(P.xyxy) + float4(0.0, 0.0, 1.0, 1.0);
float4 Pf = frac (P.xyxy) - float4(0.0, 0.0, 1.0,1.0);
float4 ix = Pi.xzxz;
float4 iy = Pi.yyww;
float4 fx = Pf.xzxz;
float4 fy = Pf.yyww;
float4 i = permute(permute(ix) + iy);
float4 gx = frac(i / 41.0) * 2.0 - 1.0 ;
float4 gy = abs(gx) - 0.5 ;
float4 tx = floor(gx + 0.5);
gx = gx - tx;
float2 g00 = float2(gx.x,gy.x);
float2 g10 = float2(gx.y,gy.y);
float2 g01 = float2(gx.z,gy.z);
float2 g11 = float2(gx.w,gy.w);
float4 norm = taylorInvSqrt(float4(dot(g00, g00), dot(g01, g01), dot(g10, g10), dot(g11, g11)));
g00 *= norm.x;
g01 *= norm.y;
g10 *= norm.z;
float n00 = dot(g00, float2(fx.x, fy.x));
float n10 = dot(g10, float2(fx.y, fy.y));
float n01 = dot(g01, float2(fx.z, fy.z));
float n11 = dot(g11, float2(fx.w, fy.w));
float2 fade_xy = fade(Pf.xy);
float2 n_x = lerp(float2(n00, n01), float2(n10, n11), fade_xy.x);
float n_xy = lerp(n_x.x, n_x.y, fade_xy.y);
return 2.3 * n_xy;
}
float GetNoise(float2 xy,float scroll,float size){
xy *= size;
xy += float2(scroll,1);
float ns = PerlinNoise2D(xy) / 2 + 0.5f;
return ns;
}
Shader "Custom/TexBug" {
Properties{
_MainTex("MainTex",2D) = "white"{}
_Height("Height",float) = 1.8//アバターの足裏をゼロとした場合の頭頂部の位置、つまり身長
_Width("Width",float) = 0.3//アバターの中心からの横幅
_Digit("Digit",Range(1,10)) = 1
_ChangeFrec("ChangeFrec",Range(1,500)) = 1 //バグ発生個所の変更頻度
_MaxBoxSize("MaxBoxSize",Range(0,0.1)) = 0.1
_MaxNoiseLen("MaxNoiseLen",Range(0,0.5)) = 0.5
_BugLoop("BugLoop",Range(1,50)) = 30
_BugLineColor("BugLineColor",Color) = (1,0,0,1)
_BugLineWidth("BugLineWidth",Range(0,0.01)) = 0.01
_BugSpd("BugSpd",Range(1,10)) = 3
_BugNum("BugNum",Range(1,20)) = 2
}
SubShader{
Tags{"RenderType"="Opaque" "DisableBatching"="true"}
//透明部分のあるテクスチャを使う場合
//Tags{"Queue" = "Transparent" "RenderType" = "Transparent"}
//Blend SrcAlpha OneMinusSrcAlpha
Lighting Off
Pass{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
#include "ParinNoise.cginc"
struct appdata {
float4 vertex:POSITION;
float4 uv:TEXCOORD0;
};
struct v2f {
float4 pos:SV_POSITION;
float4 uv:TEXCOORD0;
float type:TEXCOORD1;
};
float _PI = 3.141592;
sampler2D _MainTex;
float _Height;
float _Width;
float _Digit;
float _ChangeFrec;
float _MaxBoxSize;
float _MaxNoiseLen;
float _BugLoop;
float4 _BugLineColor;
float _BugLineWidth;
float _BugSpd;
float _BugNum;
//0~1を返す
float rand(float2 co){
return frac(sin(dot(co.xy ,float2(12.9898,78.233))) * 43758.5453);
}
float noise(float2 xy){
return frac(sin(dot(xy, float2(1000, 1000))) * 2000);
}
float NormalizeX(float x){
return x/_Width;
}
//-1~1に
float NormalizeY(float y){
return y/_Height;
}
float Pow(float val,int times){
float res = 1;
for(int k=0;k<times;k++){
res *= val;
}
return res;
}
float GetNumByTime(float digit,float change_frec){
int d = trunc(digit);
float tm = _Time.y/change_frec*Pow(10,d);
float mx = trunc(tm);//小数部3桁を整数部に移動
return frac(mx/10000);//整数部5桁を小数部に移動しそれのみxに代入
}
//-1~1の値を取る
float2 BugCenterPos(float av){
float x = rand(GetNumByTime(_Digit,_ChangeFrec)+av);
float y = rand(float2(x,x));
x = (x - 0.5)*2;
y = (y - 0.5)*2;
//return float2(0,0);
return float2(x,y);
}
//箱の距離関数
float rectangle(float2 p, float2 size){
return max(abs(p.x) - size.x/_Width, abs(p.y) - size.y/_Height);
}
float4 BugBoxFrame(float4 c,float2 p,float ActBoxSizeX,float ActBoxSizeY){
float leng = rectangle(p,float2(ActBoxSizeX+_BugLineWidth,ActBoxSizeY+_BugLineWidth));
return lerp(c,_BugLineColor,step(leng,0.001));
}
float4 BugBoxCont(float4 c,float2 p,float ActBoxSizeX,float ActBoxSizeY){
float leng = rectangle(p,float2(ActBoxSizeX,ActBoxSizeY));
return lerp(c,float4(0,0,0,0),step(leng,0.001));
}
v2f vert(appdata v){
v2f o = (v2f)0;
o.pos = UnityObjectToClipPos(v.vertex);
o.uv = v.uv;
float nx = NormalizeX(v.vertex.x);
float ny = NormalizeY(v.vertex.y);
for(int j=0;j<_BugNum;j++){
float2 o_cpos = BugCenterPos(rand(j));
float time = GetNumByTime(_Digit,_ChangeFrec/_BugSpd);
//unroll内の数値は_BugLoopに合わせて置き換える
//ループ展開するだけのはずだが結果が変わる場合がある
//[unroll(10)]
for(int k=0;k<_BugLoop;k++){
float2 cpos = o_cpos;
uint f = k - k % 2;
//中心となる位置から少しずらしたランダムなBoxの位置
cpos.x = o_cpos.x + (noise(float2(rand(f+0.1+time),rand(f+0.2+time)))-0.5)*2*_MaxNoiseLen/_Width;
cpos.y = o_cpos.y + (noise(float2(rand(f+0.3+time),rand(f+0.4+time)))-0.5)*2*_MaxNoiseLen/_Height;
//_MaxBoxSizeを最大値としたランダムな数
float mx = rand(f+0.5+time)*_MaxBoxSize;
float ActBoxSizeX = _MaxBoxSize - mx;
//_MaxBoxSizeを最大値としたランダムな数
float my = rand(f+0.7+time)*_MaxBoxSize;
float ActBoxSizeY = _MaxBoxSize - my;
float2 p = float2(cpos.x-nx,cpos.y-ny);
if(rectangle(p,float2(ActBoxSizeX,ActBoxSizeY))<0.00001){
o.type = 1;//clip(-1)
return o;
}
if(rectangle(p,float2(ActBoxSizeX+_BugLineWidth,ActBoxSizeY+_BugLineWidth))<0.00001){
o.type = 2;//BugLineColor
return o;
}
}
}
o.type = 0;//DefaultTex
return o;
}
float4 frag(v2f i) :SV_Target {
if(i.type >=0 && i.type < 0.66) return tex2D(_MainTex,i.uv);
if(i.type >=0.66 && i.type < 1.32) clip(-1);
if(i.type >=1.32 && i.type <=2 ) _BugLineColor;
return float4(0,0,1,1);
}
ENDCG
}//Pass
}//SubShader
//FallBack "Diffuse"
}
