Article View: comp.lang.pascal.borland
Article #63Re: 3d programming
From: schumaker
Date: Thu, 15 Feb 1996 00:03
Date: Thu, 15 Feb 1996 00:03
36 lines
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1969 bytes
>> > > >Actually, you only need 2 points to define a plane: a point on the plane and >> > > >a normal vector. >> > > >> > > Sorry to quibble, but... >> > > >> > > A VECTOR IS NOT A POINT!!!! >> > > >> > > Now back to our regular program. >> > >> > Points are vectors. >> > ^^^^^^^^^^^^^^^^^^ >> >> Sorry, but I must take offense here. A point in Cartesian space has three >> aspects [X,Y,Z]. A vector requires a direction, and depending on how sticky you >> are, probably a length. This implies 6 independent aspects. Result; A plane >> requires 3 points. Always. > >You're wrong. A vector is any quantity with any given number of dimensions. The >number 5 is a vector, called a scalar. The vector [x,y,z] can refer to a position >vector (point) or direction vector. > >I suggest you take some math courses before you try to explain such basic concepts. your wrong a vector and a scalar are completely different. 5 is not a vector called a scalar it is a scalar. Look up in any physics book and a scalar is defined as any given value. 5,10,3.116, any # is a scalar but a vector is number WITH direction ie 5 at 13degress is a vector. matt
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Newsgroups: comp.lang.pascal.borland,comp.lang.pascal.mac,comp.lang.pascal.ansi-iso,comp.lang.pascal.misc,comp.sys.amiga.programmer,comp.graphics.algorithms,comp.os.ms-windows.programmer.graphics,comp.sys.amiga.graphics Path: arc1-ca.pugleaf.net!newsreader.jvnc.net!nbw-ts1-tty10 From: schumaker@tigger.jvnc.net (schumaker) Subject: Re: 3d programming Message-ID: <DMsIw4.HvL@tigger.jvnc.net> Sender: news@tigger.jvnc.net (Zee News Genie) Organization: JvNCnet X-Newsreader: News Xpress Version 1.0 Beta #4 References: <4f3od9$2jg@zeus.tcp.co.uk> <jderrick-0502961551360001@slip037.csc.cuhk.hk> <3118310E.52F@psu.edu> <4fiuh2$qrj@fulton.cs.unc.edu> <311E38D7.71BC@psu.edu> <311F9C84.3B26@structure.chimie.usherb.ca> <312028C1.C1F@nmsu.edu> Date: Thu, 15 Feb 1996 00:03:38 GMT