How can I create a long shadow? - RealWorld forums

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How can I create a long shadow?

especially in on reflex arcs
J
on June 12th

Hi guys I created this topic coz i needed some help in creating a longshadow
like this one
rsrc/longshadow.png image

longshadow can be easily applied to polygonal objects like this letter "A"
for that I use polygon tool with linear gradient fill and place the corners of the polygon on that of the element.

but my problem is with circular elements like this:
rsrc/loadingsmall.gif image

I wanted to add longshadow to the spinning emarald color element
it is a bit manageable in the first few frames but after the spinner makes reflex arcs it seems damn impossible to make one.
Any help I could use here?

Vlasta
on June 14th

What do you mean by "damn impossible"? Does it take too much time? Does is look weird or inconsistent when it is animated? Is it because the shadow is too small?

J
on June 16th

when the arcs are small a long shadow can be added easily with the polygon and linear gradient.
The problem starts appearing when:
1.

  the Arc becomes greater than 45 degree, it looks weird when I place the
  corners of the shadow polygon at the arcs corners, if I increase the corners
  such that I place 2 of them at cornersof the arc and one at the center, the
  shadow somewhat looks pointy.that I have solved for now by adding more than
  3
  corners on the arc border itself.

2.

  when the arcs become obtuse the shadow does not look evenly distributed and
  black colour appears at the extreme ends when I try to fit the gradient in
  the shadow polygon.

3.

  same problem occurs when the arcs become greater than 180 degrees and the
  shadow seems to be unnesecarily dark at the ends and too light at the center
  Not only that adding shadows becomes harder just like adding the shadow
  to letter S( this explanation is little weird but cannot explain it
  properly)
cdl
on June 19th

Do you have any examples of these problems you are experiencing?

J
on June 20th

sorry for my noobie question but how can I upload an image here in my post?
I'll show some frames that do the problem

Edit : I have uploaded them in my blog and then used their tags but I still want to know how to upload directly in forums.

getting back to the topic,
This frame does not look problematic at all:
rsrc/frame1.png image

These are the two instances:
1st when it is greater than 45 degrees:
rsrc/problemframe1.png image
see the upper part of the arc where it becomes overly dark and the lower part where it is bright. quite weird

the second is when it is reflex:
rsrc/problemframe2.png image

Actually I had to put an extra polygon for the second part of the shadow
but still it looks somewhat weird.
thats not the only problem but I want a shadow that is casted by a light source at 45 degrees of the canvas (through the two opposite corners of the canvas)
and if I deviate from this angle the shadow looks as if my animation is as a whole glitchy.
I want to add shadows properly and at the same time want the animation to look consistent

J
on June 20th

I suggest that you save the gif in the first post and see that the first few and last few frames do not cause any problem.
it is the frames in between that cause the problem

J
on June 23rd

please help guys

J
on June 25th

is this thread already dead?
(Btw it rhymes nicely)
Please I could really used some help.

J
on July 3rd

this thread is really dead.
If i have done a mistake in asking this question in a different thread then please forgive me but please dont turn a deaf ear (or probably a blind eye )towrds this thread.
Please help guys

cdl
on July 3rd

I have nudged a few of our best and Vlasta is aware of this thread.
I am a bit surprised that no one has any ideas to offer.

I assume you have searched online for a solution to this problem.
You may need to post in a forum outside of RW.

icon-image/11148-32x32x32.png image

JDDellGuy
on July 4th

Unfortunately, I can't determine how to upload an animation, but I was able to assemble a rough proof-of-concept which basically works as follows.

1. Create your full donut shape on the canvas.
2. Create a series of layer effects - drop shadows with diagonal offsets. Each additional drop shadow effect should be offset a little more and should be slightly lighter than the one before. This will create shadows that stretch off diagonally and hopefully blend well into each other so that it looks like one large shadow. By doing it as a layer effect rather than a one-time effect, you can easily manipulate the spinning features without having to manually re-apply a series of drop shadows each time.

Hopefully that description helps. I don't check in very often these days, but if someone can point out how to upload an animation, I'll show you the rough concept what I came up with.

J
on July 5th

I think that will really help JDDellguy.
I'll try it to see what happens and then upload the result.
But it'll be great if you upload the animated png or the jpg file.
(I uploaded it by creating a blog in full editor mode in my blog section.
there was an 'upload file' button which we can use to upload any image file.
then once it is uploaded click on it and you will get somewhat tag like syntax in your text entry space in the blog. just copy the tag, you can discard the blog if you want to but the uploaded image will still be on the server.Paste the copied tag in the post reply box and its done)

batuzanx
on July 5th

"bold" how?

cdl
on July 7th

bold? Who said bold?
No one said bold batuzanx.
--------

Thanks for taking the time to assist JDDellGuy!

--------

My images will not show when I post the code J.

The last image was uploaded days ago, the previous was uploaded years ago, neither image will show. I followed the directions in the Forum post formatting thread and still no images. I don't know what is wrong.

icon-image/8377-32x32x32.png image

J
on July 8th

I have somewaht tried what JDDellguy Mentioned and it looks very similar.
but it seems too dark.
I have added these steps:
1st step shadow size=3 density=150 offset=1 and 1
2nd step shadow size=3 density=140 offset=2 and 2
3rd step shadow size=3 density=130 offset=3 and 3

in this way i am decreasing intensity by 10 and offset is increasing by +1
can you suggest some other step pattern( density and offset change pattern)
with which I make the shadow less darker.
(btw I'm still trying and will tell the results once it looks satisfactorily good)

Cdl I had faced the same issue in the past month.
Try reuploading images with names like 456.png or 147.jpg
(In my icon blog I was only able to upload only one image and when i uploaded other together it displayed some error. so I tried this trick 8-) )

This is the result:
Please ignore the glitches I'll correct'em later on
rsrc/loading.png image

cdl
on July 14th

Okay, when I get a round tuit I will try your suggestion. Thanks.

At least the shadow is progress. Looks good, it will be nice to see the result when you finish it. Please post how you achieve the final result so anyone that wants to try it on their own can.

icon-image/12112-48x48x32.png image

J
on July 18th

Finally I managed to pull off a decent longshadow spinning animation
Take a look at it:
rsrc/loading.gif image
In this try the shadow looks more smoother than it did in the above post.
I stuck to this pattern:

    A.step 1 add shadow (shadow size 2, density 100 and offsets 1 and 1)
    B.step 2 add shadow (shadow size 2, density 95 and offsets 2 and 2)
    C.step 3 add shadow (shadow size 2, density 90 and offsets 3 and 3)

This way you can add a long shadow by following this pattern.
Try as many as steps as you like.
Somethings that I observer were:
if you start of with a shadow of density 50 and only decrease density in each step by 3 you can achieve a lot subtler and lighter shadow,
Be sure to start the first layer with density less than or equal to 100 only
otherwise the shadow will be very dark.
Still you can add a darker shadow if you please!!!!

cdl
on July 20th

Great J!
Love it!
Looks fabulous!
Knew you could do it! icon-image/10438-16x16x32.png image icon-image/8424-32x32x32.png image

J
on July 22nd

Thank you for that .
I just saw something here.
It said someone is replying and you should wait for it.
I wonder who it was when i wrote this post

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