i need to create a roller coster as part of my training with Houdini,
just a roller coster inside a cave,

i did 2 curves and swep them to a nother curve,
but just 1 of them is extruded.

Also i need to make the it not so round, how can manually add more points next to another point in the curve, just like if i add points in XSI.

i put a screen shot with the detail, maybe i am setting something wrong.

thanks .

Hi,

I don't know why you have the Align SOP in the network but it's causing the Sweep SOP to read only the first curve.

For editing the original curve, put the display flag on the Curve SOP, type Enter in the viewport to enter into the Curve tool state and follow the instructions in the Status bar (coloured yellow) at the bottom of the Houdini window.

In addition, you don't need two Curve SOPs since each rail will be the same, right? If yes, in your network, you can connect both edit1 and edit2 to curve1. Or both xform1 & xform2 to edit1 or edit2.

Hope the above helps!

Cheers!
steven

Hi Steven, thanks for the reply i apreciated.

i was able to work on the curves , the problem, i really dont understan how do we “Sweep” the 2 curves together.

(i am a modo user) and we usually put the pollygon that we want to sweek on the top of the first point of the curve and then run the tool.

i send the file, i might be thinking wrong on the way to put the nodes,
yes all of them will be sweeping along the same curve,
i look for some help files, but i got with 1 curve.

thanks for your help

Hi! In sweep parameters set Cycle Type property to One Primitive at a Time.

and have a look at the Roller Coaster tutorial from waaaaaaa back…

http://odforce.net/downloads/videos/v6/overview/ [odforce.net]

Tranguz, i will check what you say later on, (tonight i am not in my pc, saturday night so i am out) and is odd, i still come to the forum to see if there is more to learn, i think i am becoming addicted to Houdini, and to the forums .

Arcotor, WHO!!!! so many tutorials to learn from, now with the flow and everything going in mexico i will have something intersting to do, there is so much to learn, thanks for the site, i will download them, over the night when i come back.

(I will post my advance later on)

“Hi! In sweep parameters set Cycle Type property to One Primitive at a Time. ”

DID THE TRICK!

Thanks guys,
i will be looking at the tutorials this week (after work, if that exist)
i am also doing the briedge tutorial from Buzz.

i apreciated your help . and the video tutorials.

i change the flow a little bit, instead of having the 2 curves and sweep them,

i did a curve with 2 points and copy along the master curve,
and copy just 1 curve to each point and then skin it, in that way i can set a null to master control the “Distance” Beetween the rails of the roller coaster.