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"OpalPlanet" <ecs### [at] msn com> wrote:
> I'm new to POV, and I'm trying to make a camera follow a certain path. For a
> total time of 5, I want the camera to spend 0<t<1 at a certain point, then
> move along a specific circular path over time 1<t<2, and then remain at the
> end
> point of this path for t>2. This is the code i wrote for it, but it doesn't
> seem to work. I'm sure I'm missing someting stupidly obvious, but could
> someone give me a hand. Either de-bug or a pointer in the right direction
> would be helpful.
>
> Thx,
> OpalPlanet
>
>
> //declare variables for camera motion
> #declare loopcount = 0;
> #declare X = 0;
> #declare Y = 0;
> #declare Z = -3.5;
> #declare Ystep = -.01375;
> #declare Zstep = -.0125;
>
> #if (clock <= 1)
> camera {
> location <0,0,-3.5 >
> look_at <0,0,0>}
>
> #else #if (clock <= 2)
> //move camera coords
> #while loopcount <= 200
> Y = Y + Ystep;
> Z = Z + Zstep;
> #end // end while
> camera {
> location <0, Y, Z >
> look_at <0,0,0>
> }
>
> #else
> camera{
> location<0,-2.75,-1>
> look_at<0,0,0>
> }
> //end cameras
It looks like you're missing some parenthesis next to your #while statement,
and some #end statements. You also forgot to increment your counter. It
doesn't work to use multiple #else's but there is a handier thing you can
use instead:
#switch()
#case() #break
#case() #break
#case() #break
#end
Untested but it'd look something like this:
//declare variables for camera motion
#declare X = 0;
#declare Y = 0;
#declare Z = -3.5;
#declare Xstep = 0;
#declare Ystep = -2.75;
#declare Zstep = -1;
#declare MyClock = 5*clock; //A clock that goes from 0 to 1 is good for
compatibility.
#switch (MyClock)
#case(MyClock <=1)
#declare Cam_Location = <0,0,-3.5>;
#declare Cam_Look_At = <0,0,0>;
#break
#case(MyClock <= 2) //testing for <= 1 is covered by previous #case
#declare Cam_Location =
<X+Xstep*(MyClock-1),Y+YStep*(MyClock-1),Z+Zstep*(MyClock-1)>;
#declare Cam_Look_At = <0,0,0>;
#break
#case(MyClock > 2)
#declare Cam_Location = <0,-2.75,-1>;
#declare Cam_Look_At = <0,0,0>;
#break
#end //end #switch (MyClock)
camera{
location Cam_Location
look_at Cam_Look_At
}
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