Thank you mike, The scale will give me the distance betetween point-0 and point-3 if i anderstoud. It looks good for me. I thought this but i am not so good in vector calculation.
Thank again, -----Message d'origine----- De : Mike Pilone <[EMAIL PROTECTED]> Ŕ : [EMAIL PROTECTED] <[EMAIL PROTECTED]> Date : jeudi 27 mai 2004 12:54 Objet : Re: [JAVA3D] point projection using angle. >Hello, > >Not to get too much into detail, you can do this using simple vector math. >Create a vector to p1, then p2. Subtract the vectors to get the resulting >vector from p1 to p2. Get the distance of the vector and scale it to be >wherever you want p3. > >Java3D provides the Vector3* and Vector4* classes for this, so the math is >mostly done for you. The tricky part is just remembering which point to >subtract from which. You can find more information on this at places like >Dr. Math and Mathworld. Just google it a bit. > >Good luck, >-mike > > >-----Original Message----- >From: Discussion list for Java 3D API [mailto:[EMAIL PROTECTED] >On Behalf Of hterrolle >Sent: Thursday, May 27, 2004 4:23 AM >To: [EMAIL PROTECTED] >Subject: [JAVA3D] point projection using angle. > >Hi, > >I got a little problem. I woul like to do some point projection using angle >calculation. I really do not know how to do it. I have seen the Project >method inside the point.class. But i do not think this will help me. > >What i want to do is : > > i want to do a parralelle projection of a point. Example i got point-1 >(0,0,0) and point-2 (1,2.5,3) and i would like to create a thrid point at >2.0 of distance from point-2 on the same direction that point-1,point-2. > > Point-1 point-2 point-3 ( parrlelle >projection) > O-----------------O---------------O > > >Thanks a lot. > > Herve >=========================================================================== >To unsubscribe, send email to [EMAIL PROTECTED] and include in the body >of the message "signoff JAVA3D-INTEREST". For general help, send email to >[EMAIL PROTECTED] and include in the body of the message "help". > >=========================================================================== >To unsubscribe, send email to [EMAIL PROTECTED] and include in the body >of the message "signoff JAVA3D-INTEREST". For general help, send email to >[EMAIL PROTECTED] and include in the body of the message "help". > > =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
