I have found where I was wrong.
Thanks.
----- Original Message -----
From: "Dipl. Ing. Paul Szawlowski" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, May 31, 2001 10:47 AM
Subject: Re: [JAVA3D] set the view position
| Borja Marcos Su�rez schrieb:
|
| > I still dont understand this.
| >
| > Lets see an example:
|
| Assume the transformations are applied to the vieplatform.
|
| >
| >
| > Front view:
| > setTranslation (0,0,50);
|
| e.g. eye: 0,0,50
| center: 0,0,0
| up: 0,1,0
|
| >
| >
| > Top view:
| > setTranslation (0,50,0);
| > rotY((Math.PI/180)*-90);
|
| e.g.:
| eye: 0,50,0
| center: -1,50,0
| up: 0,1,0
|
| an example to see how the up vector works would be:
| rotZ( Math.PI)
| e.g:
| eye: 0,0,0
| center:0,0,-1
| up: 0,-1,0
|
| or
| rotZ(Math.PI/2)
| eye:0,0,0
| center:0,0,-1
| up:1,0,0
|
| >
| >
| > How can I do this two views with lookAt method?
| >
| > Thanks in advance.
|
| Anybody correct me if i'm wrong.
|
| >
| >
| > --
| > Borja
| >
| > ----- Original Message -----
| > From: "Dipl. Ing. Paul Szawlowski" <[EMAIL PROTECTED]>
| > To: <[EMAIL PROTECTED]>
| > Sent: Thursday, May 31, 2001 9:00 AM
| > Subject: Re: [JAVA3D] set the view position
| >
| > | You need all of these parameters to completely define the local coordinate
|system of the camera. With the eye
| > | parameter you specify the translation, together with the center parameter you
|specify the local z axes. But how to
| > | position the y and x-axes ? Therefore you specify the the direction of he
|positve x - axis by doing the cross
| > | product of the direction vector and the up vector. Since it is defined which
|coordinate system (left or right
| > | handed) is used, the third axes is also specified.
| > |
| > | Borja Marcos Suarez schrieb:
| > |
| > | > I need that users set the position of the view. The method that I think i have
|to use is myViewTransform.lookAt.
| > | >
| > | > It needs 3 parameters:
| > | > .- eye: the position that users set.
| > | > .- center: in my program is Point3d (0,0,0)
| > | > .- up: I dont have idea what this mean.
| > | >
| > | > I have looked the docs and I understand the frustrum idea, but not what is the
|vector up.
| > | >
| > | > When I have front view I set the view position in (0,0,50), but what I have to
|put with this method?
| > | >
| > | > Please help me... is urgent.
| > | >
| > | > ----------------------------------------------------------
| > | > Borja Marcos Suarez
| > | > mail: [EMAIL PROTECTED]
| > | > icq: 41472800
| > | > msn: [EMAIL PROTECTED]
| > | >
| > | > Java 3D Spanish Group - http://lapagina.de/java3d
| > | > Lista de correo [EMAIL PROTECTED]
| > | > ----------------------------------------------------------
| > | >
| > | > ===========================================================================
| > | > 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".
|
| ===========================================================================
| 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".
