World: r3wp

I did make a start on a 3D object viewer ... it would draw wireframes 
on 3D objects in the .obj format.

Most object do contain thousands of faces ... so you dont get great 
performance.

yes - but for 3d tools like wings3D you usually have less than 10000 
faces before you export to Maya/Lightwave etc

i normally use wings3D for the basic shapes then export to subdivide 
etc

is the rotation algorithm quite intensive?

I haveent optimisec it ..... for smallish numbers of faces you can 
get good performance .... (I'm no 3D expert)

It is processor intensive as it is written entirely in Rebol

Reb Rings Mini MGV released - see announce.  Mouse gestures etc.

yet another isometric type world renderer - http://rebol.mustard.co.nz/isometric-world.r

beautiful

very nice

Excellent.. This type of work could be the basis for a Rebol based 
GIS. Inspirational - thanks!

Or a nice & simple ORPG done with RS ;-)

Very, very cool James.

ICarii: http://cocoadevcentral.com/images/articles/000086-tigerarc.png
<--- is this layout possible?

Henrik, funny you should post that.............I'm in need of a way 
to take a 2D diagram, and turn into exactly that (which is called 
an isometric view).


A cool feature would be that the colour of a 2D rectangle, and perhaps 
even the line weight and colour would dictate the 3D height, colour, 
and treatment.


The reason I want this is that I'm building a diagram of the architecture 
of Qtask, and want to make it easy to see and understand.


What I'm planning to do right now is draw it in 2D first.  Then pick 
a good angle (in my mind).  Then build all the 3D objects on an isometric 
field (sort of like old video games like Zaxxon).


Then scale them into place.  Then add the text words in front of 
them.

I like the words on top vs side as well of the image you posted.

If you know what was used to generate that I would like to know.

reichart, I sent him an email with the question.

Thanks!

if you want to you can easily use the free version of houdini (http://www.sidefx.com/)

with your IQ that software should be pretty easy to grasp... if you 
follow one of the learning tutorials.

Actually, I have played with Houdini, will look again though for 
this application of it.

new draw based menu system released (demo). http://rebol.mustard.co.nz/onyx-demo.r
new Onyx grop created regarding it.

supports radio, check, standard and menu/submenu elements at the 
moment.

pretty zippy

yeah - itd be nice to see how it performs on slow computers :)

wondering what the 'dot' is that appears on the right side of the 
 divider over the menu item  "File > Recent Files"?

By the way, very nice looking menu.

the dot is me forgetting to put in an empty? check ;)

ICarii: Cool stuff

Henrik: I don't see any problem to render such isometric layout using 
DRAW.

coming soon! New onyx styles: field, label, area, check, h1 /h2 / 
h3.  Sample at - http://rebol.mustard.co.nz/new-onyx-styles.png

Draw a surface with 3-D Perspective and allow roation - 
http://peoplecards.ca/rebol/philb/utils/3D-surface.r
& in the Rebol Library

http://www.rebol.org/cgi-bin/cgiwrap/rebol/view-script.r?script=surface.r

Is there a way to know the length in pixels of a text drawn with 
AGG?

I was just about to try  view layout [b: box effect [draw [text "test"]]] 
 planning to poke around with help b to see, then I remembered that 
REBOL Linux doesn't have draw text  :(  Sorry.  But that's were I 
would start....poking around in the objects.  May well be a waste 
of time... Then I'd fire up anamonitor and view through some of the 
system objects for that key ...size-text... kinda function.  If that 
didn't work I'd give up and wait for Cyphre :)   Excuse the babbling...

size-text will do it.

I doubt it. size-text expects a face argument and computes size based 
on face/text, face/font, face/edge and face/para values.

all of which you can change to expected agg fonts etc before calling 
size-text

s: size-text make face compose [text: (t) font/name: "arial" para/wrap?: 
off]  ;etc..

which is fine as long as you don't use vectorial ;)

as long as you use pen off/none with vectorial the results should 
still match :)

unless of course you are using rotations or scaling :)

I will test it soon, Thanks!

When drawing an object onto a face is there a way to insure that 
hte next object drawn is layed on top.

I'm drawing boxes on a face but when I try to draw addional boxes 
(different colors) they are hidden behind the first drwn objects..

In most graphics programs there is something called the z-index or 
something to that effect, that controls the depth of the objects 
in a view.  Usually range in value from 256 (top) to -256 (furthest 
away).  I can't speak for AGG though as I have not played with it 
yet.

The AGG/Draw dialect will process and render things in the order 
they are specified inside the draw block for the face.  There is 
no z-index for AGG.

I adding shape objects to a face by appending them to face/effect/draw 
but the appended shap is beneath the original face shapes.

If you draw onto a text field the text is on top. ..even if you 'paint' 
a box affter the text has been rendered. I do not understand what 
is going onthere?

Can you give a small example, eg:

view layout [box effect [draw [pen red line-width 2 shape [line 0x0 
10x0 10x10 0x10] pen green shape [line 5x0 10x5 5x15 0x5]]]]

The above example draws the red box first, and the green kite on 
top of it.

face/text rendering is separate to face/effect/draw rendering, and 
will always be on top.

So, please show us a small example of what you're doing.