object can travel and turn its direction along the curve

Replies to This Discussion

Permalink Reply by Joseph Oster on July 19, 2015 at 10:10am

Read the manual!  Watch some tutorial videos.  Do your homework.  Experiment.

Sorry, some of your questions sound like you haven't even tried yet to do it yourself.

Permalink Reply by Joyce Ho on July 19, 2015 at 11:03am

i have finished a part of component....
i can move  the object along a curve but i cannot turn the direction

so my question is how to turn the direation of object along a curve.

i tried to do that for a long time ...

but i cannot finish.

i tried to find the tutorial and website. its no any relative information about turn the object direction along the curve

Permalink Reply by nikos tzar on July 19, 2015 at 11:45am

Try [orient] instead of [move].

Permalink Reply by Joyce Ho on July 19, 2015 at 11:49am

THANKS FOR YOUR REPLY FIRST

HOW TO CONNECT THE ORIENT

Permalink Reply by nikos tzar on July 19, 2015 at 1:01pm

Permalink Reply by Joseph Oster on July 19, 2015 at 3:24pm

Thanks for the reminder (again!) about 'Reparameterize' - it makes life SO MUCH EASIER!!  I must retrain myself to use it.  Mahalo.

Attachments:

• slide_box_2015Jul19b.gh, 19 KB

Permalink Reply by Joseph Oster on July 19, 2015 at 11:59am

Two methods in this code:

• slide box along curve using 'Point on Curve' slider (first group)
• divide curve (second group)

Note the use of internalized data in the GH file - eliminates the need for the Rhino file.

Attachments:

• slide_box_2015Jul19a.gh, 22 KB

Permalink Reply by Joseph Oster on July 19, 2015 at 5:00pm

By the way, Joyce, as you orient/sweep/flow geometry along a curve, you will soon discover "torsion", if you haven't already.

The curve in this example is created with four control points:

1. the origin
2. a point along the Y axis
3. arbitrary X, Y and Z coordinates
4. same Y and Z as #3, moved to a higher value of X

The result is a curve who's tangent at the beginning is the Y-axis, and at the end, is parallel to the X-axis.

I added some switching to my previous code to choose an original orientation (circled in blue in the animation) between:

• "Curve End" - as before, origin (pA) and tangent (dA) for the box are obtained from the curve start - or...
• "World" - ignores curve, uses World origin for 'pA' and either X, Y or Z unit vectors instead of curve tangent for 'dA'.

NOTE: The X/Y/Z value list is ignored using "Curve End" - works only using "World".

Notice that "World | X" keeps the boxes level and that "Curve End" and "World | Y" have the same torsion, due to the nature of this particular curve (described above).

Aloha

Attachments:

• slide_box_2015Jul19c.gh, 18 KB

Permalink Reply by Joseph Oster on July 19, 2015 at 5:35pm

Oops!  I forgot to use "Internalize Data" on my curve; didn't notice until after I mirrored it.  Same idea, twice as long - attached.

Attachments:

• slide_box_2015Jul19d.gh, 19 KB

Permalink Reply by Joseph Oster on July 19, 2015 at 5:59pm

Animated .gif made with GH 'Animate' slider dialog, combined exported images to .gif in Photoshop ('File | Scripts | Load Files into Stack'), animate frames from layers.