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[jumpship]

Hi all

does anyone know how I can make a boing ball using Imagine4?

I have tried a few of the supplied textures and have not been able to
get it to wwrap.

I have triedd to use a brus, but have the same wraping problem... Any
ideas would be of great help!

Thanks!

[seer]

You talking about the FPU or integer version of Imagine 4 ? It's should be rather easy with the FPU version and it's ITX (?) textures.

[kd7ota]

I have always wanted a 3D object of the Boing Ball. Is there one out there for Lightwave? :-?

[Quixote]

:-D Easy peasy, lemon squeezey.

;-) First, create the primitive: a sphere with eight layers and sixteen squares in each layer. Be sure the "stagger points" option is unchecked. This way, we have ready-made squares, ready for coloring.

Since the default color of a primitive is white, we need only to color every other square red. We'll do this by selecting the squares we wish to color and defining them as a subgroup. Then we can use the attributes requestor on them to alter different characteristics, including color.

;-) To select the squares we want, we'll use the "hide points" function to hide the lower half of the sphere first, so that we are selecting faces only in the top half. Next, set the "pick mode" to "pick faces," and the "pick method" to "lasso" or "drag box." select the two faces which comprise one of the squares. Then hold the shift key down while selecting another. Work your way around systematicaly until you've selected all of the red squares, but none of the white ones.

Now select "make subgroup" from the "functions" menu. Give the subgroup a name such as "scarlet" or "crimson."

Now use the "attributes" requester to define the color.

Next, set the selection mode to "pick objects" and refresh the screen, so that the lower half is re-drawn.

;-) Repeat as above, hiding the upper half and working on the lower half this time. Be carefull not to choose the wrong squares to color red. Otherwise, your Boing Ball will look funny at its equator. Give this subgroup a different name, so as not to overwrite the first subgroup.

Now quickrender the object to insure the colors are lined up correctly at the middle. re-define one of your subgroups if you've goofed it up.

:-D Finally, save your new toy.

[JaXanim]

OK. It's a while since I worked with Imagine. I now use LightWave for
all my 3D stuff and creating a Perfect Boing ball is pretty easy. I
guess Imagine uses the same principles, so this is what I do.

First, forget about the textures and brushes bit. They won't give you
the perfect finish you need for the red and white sections.You should
simply create a crude sphere with as many sides and segments (slices)
as you want for the finished ball. IMHO, a 'genuine' Boing has 12
sides and 6 segments.

In LW, I'd create the 12 sided / 6 sliced sphere from quad (4 sided)
polygons as far as possible. You will obviously get 12 triangles at
each 'pole', which is what you need.

Next, you need to assign the 'Red' and 'White' areas. I guess you can
do this by a selection and naming method. That's how LW works anyway.
You may find it easier to work with a hemisphere only, 'cos the
various views make it difficult to see what's selected and what's not.
Just delete all the polygons in the lower hemisphere and work with
the top half.

When you've got a hemisphere right, you can mirror it and rotate the
new hemisphere by 30 degrees. This gives you a crude red and white
'checkered' sphere.

The next thing to do is to 'smooth' out the object into a true sphere
by subdividing all the polys into smaller triangles. When you render
this object, the Phong shading will create a perfect Boing ball.

If you still have any problems, visit my website and we can talk
further about it. I do have the Imagine manual if things get deep.

Cheers,

JaXanim
Website: http://waveguide.v-2-1.net

[Quixote]

IMHO, a 'genuine' Boing has 12 sides and 6 segments.

;-) Actually, Amiga.Inc's official Boing logo may have fewer faces, but the original sphere from the Boing! demo program itself used sixteen squares and eight layers. I have a copy of the Boing! demo and counted them myself.

[JaXanim]

Blimey, you must be right! I don't go back that far, but I reckon the
12x6 Boing is less 'fussy' than the 16x8. Anyway, I've placed a
12x6 BoingBall.lwo on my website for anybody to download.

I'll upload the 16x8 presentation soon and any other format
anybody may require. All you need to do is ask.

Cheers,

Jaxanim
http://waveguide.v-2-1.net

[jumpship]

Thanks all! The actual Imagine I am using is the one off of a CU-Amiga
Cover CD. (Thanks the-editor!)

No idea if it is an FPU one or not.

I will try all these ideas in the morning thanks!

JS