Thank you again :) I am continuing testing in my side. I will keep you posted too. :)
---------------------------------------------------- Miquel Campos www.akaosaru.com 2013/2/18 Alok Gandhi <[email protected]> > Nope parts are two different solutions part 1 for testing point inside > cone and part 2 for getting distance between point and axis of the cone. I > am going to set a small scene and check myself it this works (in theory it > should). > > Will keep you posted. > > > On Mon, Feb 18, 2013 at 12:23 PM, Miquel Campos > <[email protected]>wrote: > >> First patr doesn't give the value that I was expecting. Not sure If I >> mistake something. >> >> Now I gone a try with part II >> >> >> BTW: Part == approach ?? :P >> >> ---------------------------------------------------- >> >> Miquel Campos >> www.akaosaru.com >> >> >> >> 2013/2/18 Miquel Campos <[email protected]> >> >>> 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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