spirals not so laborious !!!

[ivan louette]

The idea is "clone/rotate/scale" one straight line around a center located at one of its extremities. You can easily reach that with your settings on "snap to objects"; then you move the rotation center of your line to its extremity. It's important to select "lock aspect ratio" and to type your scaling when rotation handles are selected. When you have several lines it's possible to group them, rotate around the same center and scale them several times till the group reach the good size.
After, use Shape editor with "smooth angles" and "make curves" selected to draw your curve, snapping it to the lines.
You can also place groups of lines at the angles of a quadrangle.
(perhaps not very new !!!)

Enjoy !!!

ivan

[ivan louette]

The idea is "clone/rotate/scale" one straight line around a center located at one of its extremities. You can easily reach that with your settings on "snap to objects"; then you move the rotation center of your line to its extremity. It's important to select "lock aspect ratio" and to type your scaling when rotation handles are selected. When you have several lines it's possible to group them, rotate around the same center and scale them several times till the group reach the good size.
After, use Shape editor with "smooth angles" and "make curves" selected to draw your curve, snapping it to the lines.
You can also place groups of lines at the angles of a quadrangle.
(perhaps not very new !!!)

Enjoy !!!

ivan

[Ross Macintosh]

Ivan - you are a truly useful person!

Thanks, Ross

<a href=http://www.designstop.com/>DesignStop.Com</a>

[ivan louette]

Thank you Ross, I continue to simplify the work !

Grouping the straight lines with invisible "twins" is easier because then the group turns around its own center which remains always at the same place !!!
Regards

ivan

[jassony]

I had fun playing around with your tutorial

Here is what I did with it.

[tonylondon]

Ivan your images always look really professional. I followed your tutorial but instead of using lines of increasing length I created circles, blended them and used the new position attributes tool to provide increasing circles. Then it was a case of joining up the dots...
Tony
Keep up the good work!

[ivan louette]

I have applied your technique for this one !!!
But as Judi has shown it, my own technique with the symmetric and invisible copy permits to repeat one object, decreasing its shape around one center (probably more precisely than blend on a spiral).
That's the pleasure of Xara X !!! More and more ways to obtain similar but extremely well adapted solutions !!!
Regards
ivan

[Erik Heyninck]

really high quality classical thinking. Congratulations: this will open Cosmic Vistas in lots of Xarans' minds. I'll try it out.

[ivan louette]

Specially for Erik !

1° when the first turn is made, clone it,
2° move the clone to snap its beginning to the end of the first turn,
3° move rotation and scale center to this point and scale the clone (typing several times the same ratio you have typed before) to reach the good size.
4° Then divide the width of the smaller turn by the width of the bigger one; that will give you the percentage you must enter to repeat scaling in only one operation for further steps !!!
(Here each axis was rotated of 30° and has 99% of the length of the previous; the ratio between first and second turn was 0,88651....., thus I have scaled each further turn to 88,6% to obtain a very good result).
Regards
ivan

[ivan louette]

Each spiral in this image was made with "Spiralizer", a fantastic tool which generates DXF files for 3D programs. It's free for non commercial use and commercial use is seemingly based on donations.

http://www.armanisoft.ch/

But here I didn't use a 3D rendering program but only printscreen from Spiralizer !!!

I converted only the part which contain the spiral to a 2 color bitmap, then I use this bitmap to give transparency to a rectangular shape with a fractal plasma fill. Then I add some floor shadow.

The background is made of a bitmap brush with contrast transparency.
Enjoy !!!
ivan