Ha Ha ,shame on me,thanks a lot John ! What dumb mistake..Kind of irritating stuff you could spend hours on I should defenitely take a break from coding ... :)
On Sat, Dec 4, 2010 at 8:07 PM, John Brookea out s <[email protected]>wrote: > Crossproduct returns a vector3D > > trace(mouseVector.crossProduct(vector)) > trace(mouseVector) > > > > On 4 December 2010 16:34, Michael Iv <[email protected]> wrote: > >> Hi all. I have been working on converting some stuff to Away3.6/ >> I was surprised to find that Flash player vector.crossProduct() returns >> quite different result than number3D.cross(). >> First of all I am sure that number3d.cross() is right because calculating >> cross product manually I arrived to the same result.Here is example. >> >> Cross by number3d.cross: >> var vector:Vector3D=new Vector3D(); >> >> var mouseVector:Vector3D=new Vector3D(400 - mouseX, mouseY >> - 300, 0); >> >> vector.cross(new Vector3D(0,0,1),mouseVector) >> >> let's say mouseVector is 87,2,0 then the result is ----->2,-87,0 >> also doing it manually based on 3d math operation: >> >> private function crossP(v1:Vector3D,v2:Vector3D):Vector3D{ >> var crossVec:Vector3D=new Vector3D(); >> crossVec.x=v1.y*v2.z-v1.z*v2.y; >> crossVec.y=v1.z*v2.x-v1.x*v2.z; >> crossVec.z=v1.x*v2.y-v1.y*v2.x; >> return crossVec; >> >> } >> rerturns the same result . >> >> Now check this out: >> var vector:Vector3D=new Vector3D(0,0,1); >> >> var mouseVector:Vector3D=new Vector3D(400 - mouseX, mouseY >> - 300, 0); >> >> mouseVector.crossProduct(vector); >> >> mouseVector is-->87,2,0 >> >> WTF???? >> >> >> >> -- >> Michael Ivanov ,Programmer >> Neurotech Solutions Ltd. >> Flex|Air |3D|Unity| >> www.neurotechresearch.com >> http://blog.alladvanced.net >> http://www.meetup.com/GO3D-Games-Opensource-3D/ >> Tel:054-4962254 >> [email protected] >> [email protected] >> >> > -- Michael Ivanov ,Programmer Neurotech Solutions Ltd. Flex|Air |3D|Unity| www.neurotechresearch.com http://blog.alladvanced.net http://www.meetup.com/GO3D-Games-Opensource-3D/ Tel:054-4962254 [email protected] [email protected]
