Sun and Earth

Wokka · February 10th, 2006

A quick question with the new Sky object in 9.5.
I want to create a physically correct animation of the sun and moon etc as we all rotate about the sun to show clients how passive solar design can help in Architecture. My problem is, if I apply a light as the sun in the sky object, it's intensity varies as if C4D is adjusting to the time of day on earth (which is fine for an earth view but I want a satellite view).This means I need the sky to basically remain as stars and a lightsource for the sun (appears) to rotate about the earth object. Is there a way to overide this setting as I want to show the difference between the Northern and Southern Hemispheres.
Cheers

Ernest Burden · February 10th, 2006

I'm not able to get the full question in my brain. It must be full.

But you should be able to animate day/month...

Also, you can use a different light as a 'sun' though SKY will vary its output color even if you don;t want it to.

Even though you described your task well, can you fill in more of how you see this working?

Wokka · February 10th, 2006

Basically I'll be showing an near earth orbit animation over several points on earth with a few large 'structures' to represent a buildings. I'd like to show (say) the sun angle during Febuary down here in the South then swing up to the Northern Hemisphere to show how you crazy guys up North have Winter at this time of year (weird).
I have tried using a different light in the sky object but as night falls in the South the light automatically reduces to zero intensity.
Maybe I'm missing something here?
I suppose all I really need is a sun (object-light) to move in correct reference to an earth object. Sorry if I'm not being clear.

Jorge Arango · February 11th, 2006

Quote:

Originally Posted by Wokka

Basically I'll be showing an near earth orbit animation over several points on earth with a few large 'structures' to represent a buildings. I'd like to show (say) the sun angle during Febuary down here in the South then swing up to the Northern Hemisphere to show how you crazy guys up North have Winter at this time of year (weird).
I have tried using a different light in the sky object but as night falls in the South the light automatically reduces to zero intensity.
Maybe I'm missing something here?
I suppose all I really need is a sun (object-light) to move in correct reference to an earth object. Sorry if I'm not being clear.

You can assign a sun tag to a null object and the null will behave like a sun (without light, of course). You can animate that. Then you create a light as a child of that null and you control the light intensity as you wish.
Hope this helps.
Jorge Arango

Wokka · February 12th, 2006

Thanks Jorge,
I've tried that before but I thought it would be good to get the moon etc as well.
I think I'll resort to your method though!
Cheers

February 10th, 2006	#1 (permalink)
Wokka Member Join Date: May 2003 Location: Blue Mountains Posts: 91 Name: Warwick Lloyd-Martin	Sun and Earth A quick question with the new Sky object in 9.5. I want to create a physically correct animation of the sun and moon etc as we all rotate about the sun to show clients how passive solar design can help in Architecture. My problem is, if I apply a light as the sun in the sky object, it's intensity varies as if C4D is adjusting to the time of day on earth (which is fine for an earth view but I want a satellite view).This means I need the sky to basically remain as stars and a lightsource for the sun (appears) to rotate about the earth object. Is there a way to overide this setting as I want to show the difference between the Northern and Southern Hemispheres. Cheers __________________ Wokka C4D R10.5 - VRayforC4D 1.087 ArchiCad R11

February 10th, 2006	#2 (permalink)
Ernest Burden Veteran Member Join Date: Apr 2002 Location: Ossining, NY USA Posts: 4,999 Name: Ernest Burden III	Re: Sun and Earth I'm not able to get the full question in my brain. It must be full. But you should be able to animate day/month... Also, you can use a different light as a 'sun' though SKY will vary its output color even if you don;t want it to. Even though you described your task well, can you fill in more of how you see this working? __________________ Ernest Burden III AcmeDigital architectural rendering

February 10th, 2006	#3 (permalink)
Wokka Member Join Date: May 2003 Location: Blue Mountains Posts: 91 Name: Warwick Lloyd-Martin	Re: Sun and Earth Basically I'll be showing an near earth orbit animation over several points on earth with a few large 'structures' to represent a buildings. I'd like to show (say) the sun angle during Febuary down here in the South then swing up to the Northern Hemisphere to show how you crazy guys up North have Winter at this time of year (weird). I have tried using a different light in the sky object but as night falls in the South the light automatically reduces to zero intensity. Maybe I'm missing something here? I suppose all I really need is a sun (object-light) to move in correct reference to an earth object. Sorry if I'm not being clear. __________________ Wokka C4D R10.5 - VRayforC4D 1.087 ArchiCad R11

February 12th, 2006	#5 (permalink)
Wokka Member Join Date: May 2003 Location: Blue Mountains Posts: 91 Name: Warwick Lloyd-Martin	Re: Sun and Earth Thanks Jorge, I've tried that before but I thought it would be good to get the moon etc as well. I think I'll resort to your method though! Cheers __________________ Wokka C4D R10.5 - VRayforC4D 1.087 ArchiCad R11

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