More Tiles

添加更多可平铺的tile：

define s(v,r,sc) smoothstep(r+ sc*5./iResolution.y,r, v)

//2 arc
m = s(abs(length(gv-0.5)-0.5),w,scale)+s(abs(length(gv+0.5)-0.5),w,scale);

//1 arc m = s(abs(length(gv-0.5)-0.5),w,scale)+ s(length(gv+vec2(0,.5)),w,scale)+s(length(gv+vec2(.5,0)),w,scale); //1 line m = s(abs(gv.x),w,scale)+s(length(abs(gv)-vec2(.5,0)),w,scale); //t line m = s(gv.x,w,scale)-s(length(abs(gv)-vec2(.5)),2.w,scale)+s(length(gv+vec2(-.5,0)),w,scale); //+ line m = 1.-s(length(abs(gv)-vec2(.5)),2.w,scale); //4pt m = s(length(abs(gv)-vec2(0,.5)),w,scale)+s(length(abs(gv)-vec2(.5,0)),w,scale); 生成2维hash，一个分量控制旋转，一个分量控制类型。 vec2 n = hash(floor(uv1)); gv = rotate(gv,floor(n.x4.)1.5708);//n.x - random dirction int ty = int(floor(n.y*6.));//n.y - random tile

by ERIN.Z