Subject:
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Re: Tilting the camera
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Newsgroups:
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lugnet.cad.ray
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Date:
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Tue, 18 Jun 2002 23:27:35 GMT
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Viewed:
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1069 times
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Lars C. Hassing wrote...
> Anders Isaksson wrote:
> > Modifying both SKY and RIGHT seems to do the job for me:
> >
> > #declare TiltAngle = 30
> > #declare CameraRoll = -TiltAngle*pi/180 // '-' to get CCW for positive
> > angles
> >
> > sky -y*cos(CameraRoll) - 4/3*x*sin(CameraRoll)
> > right -4/3*x*cos(CameraRoll) - y*sin(CameraRoll)
>
> Nope, sorry - it doesn't work if you look at the model from +x,
> e.g. with -cg30,90
> The solution must be to rotate (roll) the camera about the location-look_at vector
> using translate/rotate/matrix at the end of the camera definition.
location L3Location
sky -y
right -4/3*x
look_at L3LookAt
translate -L3Location
#declare vx=vaxis_rotate(x,L3LookAt-L3Location,L3RollAngle);
#declare vy=vaxis_rotate(y,L3LookAt-L3Location,L3RollAngle);
#declare vz=vaxis_rotate(z,L3LookAt-L3Location,L3RollAngle);
matrix <vx.x,vx.y,vx.z, vy.x,vy.y,vy.z, vz.x,vz.y,vz.z, 0,0,0>
translate L3Location
seems to work.
/Lars
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Message is in Reply To:
 | | Re: Tilting the camera
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| (...) Thanks, I guess it's ROLL then. (...) Hm, first vote for CCW. Why? (...) I agree, see also (URL) Modifying both SKY and RIGHT seems to do the job for me: (...) Nope, sorry - it doesn't work if you look at the model from +x, e.g. with -cg30,90 (...) (22 years ago, 30-May-02, to lugnet.cad.ray)
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