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RE: [Virtools] Moving Objects using the mouse.

Title: Moving Objects using the mouse.
Hello,
 
Please find the equations down there:
 
XYZ are 3D coords of a point IN CAMERA REF
xy are screen coords as per the near clipping plane.
WH are width and height of the screen
then we have:
X=Z*tan(fov/2)*(2*x/W-1);//1
Y=Z*tan(fov/2)*(H-2*y)/W;//2
 
You need the object Z  (picked position) and transform it into the camera ref.
Then you position the object on a plane perpendicular to the camera dir at Z,
using X,Y.
 
Best regards,
 
Christian Garnier.

 -----Message d'origine-----
De : owner-virtools-user-group@lists.theswapmeet.com [mailto:owner-virtools-user-group@lists.theswapmeet.com]De la part de Kam Memarzia
Envoyé : mardi 9 avril 2002 10:18
À : 'Virtools Mailing List'
Objet : [Virtools] Moving Objects using the mouse.

Greetings,

I'd like to replicate the Move function in Dev within a cmo using the mouse.

So that once the object is clicked on, it can be dragged around in a plane (say X,Z) - whilst staying underneath the mouse.

Its translating the screen co-ordinates into world space I think.

Any clues, thoughts, equations or solutions would be most appriciated.

Thanks

Kam Memarzia



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