t[0]=r,t[1]=a,t[2]=e,t[3]=Math.sqrt(Math.abs(1-r*r-a*a-e*e)),t},i.dot=o.dot,i.lerp=o.lerp,i.slerp=function(t,n,r,a){var e,u,o,i,c,f=n[0],s=n[1],h=n[2],M=n[3],l=r[0],v=r[1],m=r[2],p=r[3];return u=f*l+s*v+h*m+M*p,0>u&&(u=-u,l=-l,v=-v,m=-m,p=-p),1-u>1e-6?(e=Math.acos(u),o=Math.sin(e),i=Math.sin((1-a)*e)/o,c=Math.sin(a*e)/o):(i=1-a,c=a),t[0]=i*f+c*l,t[1]=i*s+c*v,t[2]=i*h+c*m,t[3]=i*M+c*p,t},i.sqlerp=function(){var t=i.create(),n=i.create();return function(r,a,e,u,o,c){return i.slerp(t,a,o,c),i.slerp(n,e,u,c),i....