POV-Ray: Newsgroups: povray.newusers: Rotating along XY plane?

POV-Ray : Newsgroups : povray.newusers : Rotating along XY plane?		Server Time 1 Nov 2024 13:20:32 EDT (-0400)

From: bardgaijin
Subject: Rotating along XY plane?
Date: 27 Jun 2005 14:25:00
Message: <web.42c044276066220c5c4d7e960@news.povray.org>

I'd like to be able to rotate an object -- for example, hands on a clock --
along a plane (in this case the XY plane). My particular project is not a
clock, but I'm hopful it illustrates my goal.

However, Pov-Ray seems to only be able to rotate objects around a particular
axis.

I guess what I'm looking for is a run-down on the math required -- i.e.
rotate so much along this axis, and then along this axis, etc.

Any help would be greatly appreciated.

Thanks alot.

-Alex

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From: Jim Charter
Subject: Re: Rotating along XY plane?
Date: 27 Jun 2005 14:55:07
Message: <42c04b8b$1@news.povray.org>

bardgaijin wrote:
> I'd like to be able to rotate an object -- for example, hands on a clock --
> along a plane (in this case the XY plane). My particular project is not a
> clock, but I'm hopful it illustrates my goal.
> 
> However, Pov-Ray seems to only be able to rotate objects around a particular
> axis.
> 
> I guess what I'm looking for is a run-down on the math required -- i.e.
> rotate so much along this axis, and then along this axis, etc.
> 
> Any help would be greatly appreciated.
> 
> Thanks alot.
> 
> -Alex
> 
> 
Maybe I don't understand your question.

Would neither of these be solutions?

#local I=0;#while(I<12)
         cylinder {
		0,
		<0,1,0>,
		.02
		rotate < I*30, 0, 0 >
		pigment { Blue }
	}
#local I=I+1;#end

#local I=0;#while(I<90)
         cylinder {
		0,
		< 0, sin(I*pi/6), cos(I*pi/6) >,
		.02
		pigment { Red }
	}
#local I=I+1;#end

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From: Warp
Subject: Re: Rotating along XY plane?
Date: 27 Jun 2005 14:58:26
Message: <42c04c52@news.povray.org>

bardgaijin <nomail@nomail> wrote:
> I guess what I'm looking for is a run-down on the math required -- i.e.
> rotate so much along this axis, and then along this axis, etc.

  There's a macro called Axis_Rotate_Trans() in transforms.inc which
does exactly this (ie. saves you from figuring out the math :) ).

-- 

                                                          - Warp

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From: bancquart sebastien
Subject: Re: Rotating along XY plane?
Date: 9 Jul 2005 07:39:41
Message: <42cfb77d@news.povray.org>

I'm not sure I understand the problem.

Rotating along XY plane doesnt mean rotating around Z axis ?


42c04c52@news.povray.org...
> bardgaijin <nomail@nomail> wrote:
>> I guess what I'm looking for is a run-down on the math required -- i.e.
>> rotate so much along this axis, and then along this axis, etc.
>
>  There's a macro called Axis_Rotate_Trans() in transforms.inc which
> does exactly this (ie. saves you from figuring out the math :) ).
>
> -- 

>                                                          - Warp

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