cycloid

[adbestias]

hi!

i work with archicad 11 on windows vista and i need to draw a cycloid; is there a way to do it? is there any generator?

thank you...

[Anonymous]

Are you looking to include gravity in this or just the path that a point on a circle takes as it rolls? Either way it doesn't look like an easy task.

[adbestias]

hi! (i'm not sure if i understood «include gravity».)

i need to create a roof wich form is generated by a cycloid; the only way i see to do this is by creating a complex profile with the cycloid, and then the roof.

thank you!

[Anonymous]

This is a good start.en.wikipedia.org/wiki/Cycloid I've given it a shot but scripting this thing is above me so far. Maybe some guru with some spare time could show us the way! Doug

[Anonymous]

Hello,

You can create an new GDL object
and use the parametric equation of a
cycloid ?
all the best
Jean-Luc

---------3D script------------------------
R=10

ROTY 45
TUBE 4, 12, 16+32,

-----4 nodes for the rectangle---------
2.0, 0.0, 0,
0.0, 0.0, 0,
0.0, 0.4, 0,
2.0, 0.4, 0,

---------12 nodes to describe the 3d cycloid curve-------
R*(15*pi/180-sin(15)),0, R*(1-cos(15)), 0,
R*(30*pi/180-sin(30)),0, R*(1-cos(30)), 0,
R*(45*pi/180-sin(45)),0, R*(1-cos(45)), 0,
R*(60*pi/180-sin(60)),0, R*(1-cos(60)), 0,

R*(75*pi/180-sin(75)),0, R*(1-cos(75)), 0,
R*(90*pi/180-sin(90)),0, R*(1-cos(90)), 0,
R*(105*pi/180-sin(105)),0, R*(1-cos(105)), 0,
R*(120*pi/180-sin(120)),0, R*(1-cos(120)), 0,

R*(135*pi/180-sin(135)),0, R*(1-cos(135)), 0,
R*(150*pi/180-sin(150)),0, R*(1-cos(150)), 0,
R*(165*pi/180-sin(165)),0, R*(1-cos(165)), 0,
R*(180*pi/180-sin(180)),0, R*(1-cos(180)), 0

[Anonymous]

Who will notice the difference?!? 😉

[Anonymous]

Who will notice the difference?!?

I thought of that too Kliment. Just seemed too easy!

[Anonymous]

may be it matters to people
dealing with strength of materials ?

[Anonymous]

hi! (i'm not sure if i understood «include gravity».)

i need to create a roof wich form is generated by a cycloid; the only way i see to do this is by creating a complex profile with the cycloid, and then the roof.

thank you!

Create a Barrel-Vaulted Roof
Roof Tool > Barrel Vaulted > Click on Cycloid by Magic Wand

[Rex Maximilian]

That diagram is a work of art, Beart!