Woah! thanks for the super answer! :D ----------------------------------------------------
Miquel Campos www.akaosaru.com 2013/2/18 Alok <[email protected]> > Sorry , correction in the last line : > > Find the distance between point p3 and vector **L through ICE. > > > On 18/02/2013 11:28 AM, Alok wrote: > > I did not get time go through Miquel's scene but here is way :- > > Refer to this diagram: > > > * > Part I (Finding whether the point is inside cone)* > This would be a better solution (found on web but the math seems right): > > S1 - Vector for one side of the cone = Vector p1 - vector p2 > S2 - Vector for the second side of the cone = Vector p1 - vector p4 > p3 - Point Vector to test > > Take the vector S2-S1 and the vector p3-S1. Normalize them both to unit > length. Take their dot product. If this number is greater than or equal to > the ***cosine of the half-angle* at the apex of the cone, then the point > is inside the cone. (If it's exactly equal, then P3 is on the cone.) > > ** cosine of the half angle at the apex of cone: Can be easily found in > ICE by angle between vectors node for the vector (S1 & S2). Divide by 2 and > then take a cos of that. > > > *Part II (Finding the distance of the point from the central line of the > cone)* > This one comes from me :) > > B = vector p4 - vector p2 > p5 = 1 /2 of B > > L = p1 - p5 > > Find the distance between point p3 and vector B through ICE. > > Cheers ! > > > On 18/02/2013 11:02 AM, Alan Fregtman wrote: > > Yes. > > For a bone, we'd be considering a cone drawing it out the direction of > the X axis of the bone's transform, knowing only its angle. Is the given > global pos inside it? And if so, how far is it from the imaginary center > line of said cone? > > > > On Mon, Feb 18, 2013 at 10:54 AM, Alok <[email protected]> wrote: > >> Do you have a ICE Scene setup ? You are wanting to test a point >> (represented as a pos vector) in a cone whose two inclined lines are >> defined by a vector, right ? >> >> On 18/02/2013 10:45 AM, Miquel Campos wrote: >> >> Hello, >> >> I struggling to found a method for test if a vector is inside a cone >> defined by two other vectors. For example for know if a point of a bended >> arm, is the internal part or the external of the elbow. >> >> Alan send me this link the other day, but I did not success getting >> anything working in ICE: >> http://stackoverflow.com/questions/10768142/verify-if-point-is-inside-a-cone-in-3d-space >> >> Someone have any idea? >> >> >> Thank you for the help!!. :D >> >> Miq >> ---------------------------------------------------- >> >> Miquel Campos >> www.akaosaru.com >> >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2012.0.2238 / Virus Database: 2639/5610 - Release Date: 02/17/13 >> >> >> > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2012.0.2238 / Virus Database: 2639/5610 - Release Date: 02/17/13 > > > >
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