[vtkusers] rescaling glyphs.??

[Rakesh Patil]

 Hello sir.Thanks a lot for your kindness.. Now its bot clear to me and I'm sure i'll come out with the result.Thanks for your guidance.. Thanks a lot.RegardsRakesh Patil Original message From:David Gobbi< david.gobbi at gmail.com >Date: 09 Feb 10 19:52:32Subject:Re: rescaling glyphs.??To: Rakesh Patil Hi Rakesh,This will have to be the last email that I answer in this discussion.Since every glyph is at a different position, you will have to do thecomputation for every glyph.The result of the dot product is the depth.Once you have the depth,you must compute the scale factor.Here's a hint: the scale factorwill be proportional to 1/depth.Good luck. DavidOn Tue, Feb 9, 2010 at 7:13 AM, Rakesh Patilwrote:> hello sir,>> Now suppose, i have to show glyphs at following positions:>> 78.23564 8.28372 5> 78.32127 8.32736 10> 78.34723 8.42864 50> ...> 80.23574 9.37256 1800>> then, for each point i need to calculate the difference and get the dot> product with projection direction??>> is th
 e result of these dot products the scale factor??> Coz in that code i didnt find and depth parameter.. only position is there..> Am i correct??>> Thanks>>  Original message > From:David Gobbi< david.gobbi at gmail.com >> Date: 09 Feb 10 19:05:11> Subject: Re: rescaling glyphs.??> To: Rakesh Patil>> Let camera position be p1, which you can get from camera>GetPosition().>> Let object position be p2, i.e. the position of a glyph.>> The vector "v" is the p2  p1:> v[0] = p2[0]  p1[0];> v[1] = p2[1]  p1[1];> v[2] = p2[2]  p1[2];>> That's all there is to it.>>>> On Tue, Feb 9, 2010 at 6:24 AM, Rakesh Patil wrote:>> Hello sir,>>>> Thanks a lot for you guidance. Please pardon me if am going wrong at any>> point.>> I'm am still not clear with this point what you said>>>> "The depth is the dot product of the camera's directionofprojection with>> the vector from the camera's position to the object's position.">>>> what exactly is a vector from the camera's position to object's position??>>
 >> Thanks> 
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