[PD] Re : camera angle

IOhannes m zmoelnig zmoelnig at iem.at
Thu Nov 15 13:47:10 CET 2007

IOhannes m zmoelnig wrote:
> Raphaël ILIAS wrote:
>> the gemwin-helpfile i had read only explained five arguments with 
>> 'view' message, instead of nine which seems to be a different method.
>> thanks a lot !
> well, obviously it has more information when it has 9 values instead of 5.
> if the explanation is missing from [gemwin]s helpfile, then somebody has 
> taken it out. i am sure it was there!

and having a quick look, i indeed read:

view <x> <y> <z> <azimuth> <elevation>::

  translate/rotate camera/viewpoint; the "up" direction will still be 
the y-axis

  default: 0 0 4 0 0

view <view_x> <view_y> <view_z> <target_x> <target_y> <target_z> <up_x> 
<up_y> <up_z>::

  set viewpoint (view_X view_Y view_Z). the camera will look at the 
target-point (target_X, target_Y, target_Z). "up" is defined via the 
vector (up_X, up_Y, up_Z)

  default: 0 0 4 0 0 0 0 1 0

i think this does pretty much explain that there can be 5 or 9 values 
(or 3 or 4, but i skipped this here) given to the [view( message and 
what they mean.


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