PDA

View Full Version : How to Animate A Sphere


BUZZFX
02-24-2006, 12:23 AM
Ok math was never my favorite subject so I need help with this.

If I want to animate a sphere 360 at 24 fps then how many frames/seconds do I need? Important! I want the sphere to rotate very slowly.

I thought 24 fps x 10 seconds = 240 frames. Is this correct?

Is there a way to keep the no. of renders/file size down and still achieve a smooth render?

Wrothgarr
02-24-2006, 01:47 AM
10 seconds at 24fps is indeed 240 frames.

As for actually animating the sphere I'm not quite sure what you mean. Do you mean you want it to rotate 360 degrees in 10 seconds?

Can't help you with the file size question either, other than, experiment with the render output settings, and see what gives the smallest files while maintaining the desired quality, and then play around with the compression settings once you create the video.

BUZZFX
02-24-2006, 03:33 AM
Yes I want it to rotate 360 in 12 seconds. I think I'll make it 12 seconds long and 24 fps which wil be 288 rendered images. This might be a bit fast but I'll try it.

What's better rendering at 24 fps (television) or 30 (Pal) What's Pal anyways Movies?

I am rendering this for web but I want to think of future uses too what's better IYO? 30 fps or 24 fps?

desmondying
02-24-2006, 08:59 AM
Yes I want it to rotate 360 in 12 seconds. I think I'll make it 12 seconds long and 24 fps which wil be 288 rendered images. This might be a bit fast but I'll try it.

What's better rendering at 24 fps (television) or 30 (Pal) What's Pal anyways Movies?

I am rendering this for web but I want to think of future uses too what's better IYO? 30 fps or 24 fps?

Pal is 25 fps, Ntsc is 30 fps. Those are broadcast standards for TV. But since web is the target market, 24fps will do.

Too many frames per second = not bandwidth friendly (you could go as low as 12 fps for 56k'ers)

converting from film(24fps) to Pal is only a small speedup, just need to do a pitch modulation if there is sound.

salmonmoose
02-24-2006, 09:30 AM
Usually, the accepted framerate for computer video is 30 fps, or Derivitives of such (15 or 60).

And for future reference, NTSC is 29.97fps

Also, make sure if you rotate the sphere 360% you remove the last frame, or if you loop your animation it will "hang" on that frame and look strange - (if you want your animation to run for 240 frames, make the animation 241 frames long, and trim the last frame)


oh, and make sure you use linear interpolation or it will change speeds.

CGTalk Moderation
02-24-2006, 09:30 AM
This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.