Hey everyone!  Newbie here!

I'm having a problem with a box that I want to rotate around the Z-axis but
it's not doing what I expect.

Here's the code:

<CODE>
#include "colors.inc"

//bathroom/kitchen wall
box {
    <0,0,0>,
    <150, 96, 6>
    pigment {color Wheat}
    finish {specular 0.5 roughness 0.2}
}

difference {
    //outside wall
    box {
        <0, 0, 0>,
        <-6, 96, -240>
        pigment {color Wheat}
        finish {specular 0.5 roughness 0.2}
    }

    box {
        <10, 45, -90>,
        <-10, 77, -126>
        pigment {color Wheat}
        finish {specular 0.5 roughness 0.2}
    }
}

//kitchen/pantry wall
box {
    <150, 0, 0>,
    <156, 158.5, -120>
    pigment {color Wheat}
    finish {specular 0.5 roughness 0.2}
}

//ceiling
box {
    <-24, 96, -240>,
    <162.5, 106, 6>
    pigment {color Wheat}
    finish {specular 0.5 roughness 0.2}
    translate 24*x
    rotate <0, 0, 22.62>

}

camera {
    location < 75, 48, -400 >
    look_at < 75, 48, 0 >
}


light_source { < 75, 96, -100 > color White }

</CODE>

my problem is with the code immediately following the "//ceiling" comment.
I want the box to rotate so that it's bottom left side is still aligned with
the "//outside wall".  However, after the rotate, it ends up with its left
side back over at x=-24 (where it was originally constructed).

After the Translate, shouldn't the box be then aligned right on the z-axis
so that the rotate leaves it there?

Please clear up my thinking on this.

TIA,
Owen

Post a reply to this message

DOH!  Figured it out.... my "//ceiling" box was not ON the z-axis at all,
but 96 units in the y-direction above it!

Owen


"Owen Mortensen" <ojm### [at] acmorg> wrote in message
news:3c7ed78f@news.povray.org...
> Hey everyone!  Newbie here!
>
> I'm having a problem with a box that I want to rotate around the Z-axis
but
> it's not doing what I expect.
>
> Here's the code:
>
> <CODE>
> #include "colors.inc"
>
> //bathroom/kitchen wall
> box {
>     <0,0,0>,
>     <150, 96, 6>
>     pigment {color Wheat}
>     finish {specular 0.5 roughness 0.2}
> }
>
> difference {
>     //outside wall
>     box {
>         <0, 0, 0>,
>         <-6, 96, -240>
>         pigment {color Wheat}
>         finish {specular 0.5 roughness 0.2}
>     }
>
>     box {
>         <10, 45, -90>,
>         <-10, 77, -126>
>         pigment {color Wheat}
>         finish {specular 0.5 roughness 0.2}
>     }
> }
>
> //kitchen/pantry wall
> box {
>     <150, 0, 0>,
>     <156, 158.5, -120>
>     pigment {color Wheat}
>     finish {specular 0.5 roughness 0.2}
> }
>
> //ceiling
> box {
>     <-24, 96, -240>,
>     <162.5, 106, 6>
>     pigment {color Wheat}
>     finish {specular 0.5 roughness 0.2}
>     translate 24*x
>     rotate <0, 0, 22.62>
>
> }
>
> camera {
>     location < 75, 48, -400 >
>     look_at < 75, 48, 0 >
> }
>
>
> light_source { < 75, 96, -100 > color White }
>
> </CODE>
>
> my problem is with the code immediately following the "//ceiling" comment.
> I want the box to rotate so that it's bottom left side is still aligned
with
> the "//outside wall".  However, after the rotate, it ends up with its left
> side back over at x=-24 (where it was originally constructed).
>
> After the Translate, shouldn't the box be then aligned right on the z-axis
> so that the rotate leaves it there?
>
> Please clear up my thinking on this.
>
> TIA,
> Owen
>
>

Post a reply to this message

On Thu, 28 Feb 2002 18:21:30 -0700, Owen Mortensen wrote: 
> Please clear up my thinking on this.

If a box is to be flat then create it where it will live, no need to 
rotate and translate etc. 

I havn't tested your code or even read it but from what you're saying
there's no need to rotate and translate it. 

--
#local i=.1;#local I=(i/i)/i;#local l=(i+i)/i;#local ll=(I/i)/l;box{<-ll,
-((I/I)+l),-ll><ll,-l,ll>pigment{checker scale l}finish{ambient((I/l)/I)+
(l/I)}}sphere{<i-i,l-l,(I/l)>l/l pigment{rgb((I/l)/I)}finish{reflection((
I/l)/I)-(l/I)specular(I/l)/I}}light_source{<I-l,I+I,(I-l)/l>l/l} // Steve

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