It seems I am doing something wrong - I am not getting the right values. MB
> Den 14. marts 2017 klokken 12:40 skrev [email protected]: > > > The easiest thing is to emit over the whole object then do what you did and > plug the output of your 'Less than' into a Delete Particle node. > > -----Original Message----- > From: Morten Bartholdy > Sent: Tuesday, March 14, 2017 11:19 AM > To: Official Softimage Users Mailing List. > https://groups.google.com/forum/#!forum/xsi_list ; [email protected] > Subject: Re: Emit particles frm surfaces facing a particular direction? > > Thanks Paul. I know stuf like this is trivial to you, but it is not so much > the method that escapes me as the lack of a tool that does this. > > I can figure out how to get a vector from a nulls position and Get Point > Normals from my geometry, I can then get the angle between them and put than > into a Less than or equal to node, but how to transform a threshold value > into either weightmap values, creating a sample set to emit from or > filtering an emission, I don't know. > > I was sort of hoping there would be a node or compound I had overlooked > which provided something I could use :) > > cheers > Morten > > > > Den 14. marts 2017 klokken 11:11 skrev [email protected]: > > > > > > You can either > > > > Emit from the whole and delete the ones that aren't pointing in the right > > direction, (based on comparing the normal angle to your preferred vector) > > > > Or create a weightmap on the object and use ICE to set the values based > > upon > > the normal angle and use the weightmap in the Emit node. (This wont work > > on > > low poly meshes for obvious reasons) > > > > Or make a duplicate of the surface, and use ICE to delete Polys that > > aren't > > pointing in the right direction, then emit from the resulting object. > > > > > > Number 1 is the easiest to set up. > > > > Paul > > > > > > -----Original Message----- > > From: Morten Bartholdy > > Sent: Tuesday, March 14, 2017 10:05 AM > > To: Userlist, Softimage > > Subject: Emit particles frm surfaces facing a particular direction? > > > > I have looked through the sample scenes but could not find something that > > does this. I want to emit particles from surfaces of an object that faces > > in > > a particular direction, either a custom vector or fom polygons facing a > > null. > > > > How can I do this? > > > > Thanks. > > > > Morten > > ------ > > Softimage Mailing List. > > To unsubscribe, send a mail to [email protected] > > with > > "unsubscribe" in the subject, and reply to confirm. > > > > ------ > > Softimage Mailing List. > > To unsubscribe, send a mail to [email protected] > > with "unsubscribe" in the subject, and reply to confirm. > ------ Softimage Mailing List. To unsubscribe, send a mail to [email protected] with "unsubscribe" in the subject, and reply to confirm.
