{$0=0>sin(p=atan2($2-$6,$1-$5)-atan2($4-$6,$3-$5))*sin(p-atan2($2-$8,$1-$7)+atan2($4-$8,$3-$7))}1
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
download
return to the top page