One for the CAD workers maybe...?

[DaN]

I want to be able to make a rose-style shape (Ie. Yorks/Lancs rose) for use in some SoB iconography.

However, I wondered if anyone had any ideas on how to do it using geometry so it\'s easy to scale up or down if needed...

Ie. In the same way that artists use the golden ratio Golden Ratio linky here

 

[Roger Bunting]

Just divide it up using a grid and scale each area down.

Oh, be careful about the golden ratio. Before you know it, you\'ll be reading books on pentagrams and stuff. or is that just me? lol

 

[lono]

Something like that you mean?

 

[Roger Bunting]

That or any such grid. There\'s also the option of scanning the pattern in your comp and scaling it up or down, or if you don\'t have a scanner, go find a photocopier.

 

[DaN]

Yeah that target thing is what I came up with.

The thing I\'m after though, is the geometry to draw it in the FIRST place, resizing it afterwards is merely a matter of lengthening or narrowing the width of the compass or whatever

Anyway - I\'ll see what I can come up with myself and I might post the results if they work and are marginally intersting

@Rog - careful Rog, Wiccan will be after you if you try and move in on her turf

 

[mud duck]

what program where you planing on using? It looks to me to be able to be split into ten slices, sooo.... let me work on it

 

[Roger Bunting]

Ah, now I see. Well, start with pentagons and go from there.

I\'m sure Donna won\'t mind me moving in.

 

[Legacy Account]

Do it in Illustrator:

Rotating and repeating patterns in Illustrator...

 

[Legacy Account]

Here you go, piece of piss!

I\'ve got that saved out as an .ai file - if you want it just give me a shout. Or it can be saved as an .eps so it\'ll open in any vector drawing program.

Edit: missed out the spikey bits off the inner rose...

That\'s better.

 

[DaN]

Hmm... Maybe I didn\'t explain it all that well.
I can easily take an image offline and resize it, but that isn\'t what I wanted.

Anyway - I figured out a rough method for doing that style of rose.

1. (Doesn\'t matter which way round you do this step) Draw a circle in the same diameter that you want the rose, then draw a smaller circle in the centre which will be the \"stigma?\"* of the flower

* Like the yellow part of a daisy

2. Draw eight lines (In pencil, or in another layer if using an art program) through the centre of the circle, all the way through, each at 45° from the other

3. Four of these lines will be the edges of the four petals, so go over these in pen to about half of the way out from the centre

4. Now, in pencil again, draw equilateral triangles, so that two corners touch the edge of the petal line and across to the central line, the last point touching the edge of the outer circle.
You should end up with eight of these.

5. From here you should be able to finish the rose.

(I\'ll include steps later)

Does anyone understand wtf I just said? lol

 

[squidders]

usually you would \"draw\" one of the facets of the rose in the CAD application and then clone it as an array around the centre point to form the other facets so you only need to spend the time on one part (72 degrees).

Trouble is that now sound like a nerd

 

[Talonicus]

Umm sounds like you are a nerd


Funny thing is I was going to say the same.

But I am most obviously not a nerd.
:innocent:

 

[squidders]

of course you\'re not mate... of course lol

 

[Beelzebrush]

Originally posted by DaN
Hmm... Maybe I didn\'t explain it all that well.
I can easily take an image offline and resize it, but that isn\'t what I wanted.

Anyway - I figured out a rough method for doing that style of rose.

1. (Doesn\'t matter which way round you do this step) Draw a circle in the same diameter that you want the rose, then draw a smaller circle in the centre which will be the \"stigma?\"* of the flower

* Like the yellow part of a daisy

2. Draw eight lines (In pencil, or in another layer if using an art program) through the centre of the circle, all the way through, each at 45° from the other

3. Four of these lines will be the edges of the four petals, so go over these in pen to about half of the way out from the centre

4. Now, in pencil again, draw equilateral triangles, so that two corners touch the edge of the petal line and across to the central line, the last point touching the edge of the outer circle.
You should end up with eight of these.

5. From here you should be able to finish the rose.

(I\'ll include steps later)

Does anyone understand wtf I just said? lol

There\'s 5 petals though. So youre going to need to construct two pentagons. The smaller one with the pentagon pointing upwards and and the larger with the pentagon pointing downwards. That will give you the points of the black bits between the petals. To do this you will need to draw two concentric circles and then find reference on the net to construct a pentagon - it\'s too complicated to put into words. You do end up using the golden section you mentioned.

When you\'ve drawn the pentagons use the points on the larger pentagon to draw radius to the centre of the circles and then likewise on the smaller circle radiating outwards. This gives you 10 radii that intersect both circles - these points are the reference to the whole thing. From this point it\'s reasonably plain sailing.

That\'s assuming you meant you were going to construct this by hand with a compass and a ruler.

**edit here\'s a link to construct a pentagon - http://www.jimloy.com/geometry/pentagon.htm

Have fun

 

[DaN]

This is true, but I don\'t HAVE any CAD programs - just a few art ones
Just thought it would help if someone wanted to trace the outline to cut from some plasticard or something...

 

[Thunderhawker]

You guys are making my brain hurt!

 

[lono]

I must still be missing something, because I would have thought that the twin circles and 5 lines method I posted up would be the simplest guide to work from. You can use this to replicate it at any size. Every single point you\'d require for drawing the petals is mapped. You just have to join the dots.

 

[DaN]

@lono - I actually use your template in my description - it\'s just a few extra bits I put in

You\'ll see it when I add my example

 

[PegaZus]

Big CAD driver here. And honestly, were I given this task, I\'d use PowerPoint, scale it to the size, and print out a page of the things.

If you\'re going for a 3D plasticard rose, I\'d just copy several of them over and over on one sheet. Glue each one onto the card with PVA (so it gets removed easily), then cut it out with a hobby knife.

However, it almost sounds like you\'re trying to freehand this. In which case... I\'d still use PowerPoint and some transfer/carbon paper.

Okay, if you don\'t have PowerPoint... MS Paint. A photocopier. I think tattoo artists do the photocopier thing. Believe I saw that once on Miami Ink.

 

[Legacy Account]

Just download Illustrator and do it properly!!

Draw the yellow bit.

Draw ONE of the petals.

Use that link I posted to copy/rotate 5 times at 72 degrees.

Select the five petals and use Pathfinder to weld them together.

Copy, Paste and Rotate 36 degrees. Shrink to size of inner rose and centre.

Draw the other farty little bits and repeat the copy/rotate business.

Takes a few minutes!

I have no idea why anyone would want to do this sort of thing freehand these days! If you want Illustrator, PM me....