){n=n||1;var r=2*a.RANDOM()*Math.PI;return t[0]=Math.cos(r)*n,t[1]=Math.sin(r)*n,t},e.transformMat2=function(t,n,r){var a=n[0],e=n[1];return t[0]=r[0]*a+r[2]*e,t[1]=r[1]*a+r[3]*e,t},e.transformMat2d=function(t,n,r){var a=n[0],e=n[1];return t[0]=r[0]*a+r[2]*e+r[4],t[1]=r[1]*a+r[3]*e+r[5],t},e.transformMat3=function(t,n,r){var a=n[0],e=n[1];return t[0]=r[0]*a+r[3]*e+r[6],t[1]=r[1]*a+r[4]*e+r[7],t},e.transformMat4=function(t,n,r){var a=n[0],e=n[1];return t[0]=r[0]*a+r[4]*e+r[12],t[1]=r[1]*a+r[5]*e+...