|
![](/i/fill.gif) |
>> All these years, I thought the correct way to compute the cross
>> product of two vectors is
>>
>> x3 = y1 z2 - z1 y2
>> y3 = x1 z2 - z1 x2
>> z3 = x1 y2 - y1 x2
>>
>> But, apparently, I was wrong. The correct way is in fact
>>
>> x3 = y1 z2 - z1 y2
>> y3 = z1 x2 - x1 z2
>> z3 = x1 y2 - y1 x2
>>
>
> You should have caught that based on symmetry.
Well, the rule seems clear: the expression for (say) Y involves every
coordinate except Y itself. I never realised it actually matters which
order you put them in...
Post a reply to this message
|
![](/i/fill.gif) |