25 replies to this topic

[bobster]

Description:
Flock particles from a grid to a sphere.  Copy an object to the particles.  The copied objects need to orient themselves in mid flight so they land back on their base.  The base of the object needs to sit on top of the grid and the sphere and not intersect them. Must be procedural.

See attached mov file

Enjoy

I'll post my hip file later.

Attached Files

•  challenge.mov   120.11K   2071 downloads

[mark]

hi bobster, i'll give this a go.  

there seems to be a problem with the .mov file though - anyone else had problems?  i thought it was a linux problem, but its not working here at work either on winXP.  error is "challenge.0001.jpg required and not found" or similar.

[bobster]

Ya, there is a problem with linux but it does play on my pc with winXP. Maybe it's the compression.  I've tried a different compression so hopefully it'll work.

Sorry about that.

Here's the new download.

Attached Files

•  challenge.256x195.sorenson.least.mov   124.11K   1008 downloads

[Jason]

Nice challenge!  

[Lukich]

Here you go.

Attached Files

•  challenge.mov   105.9K   681 downloads

[halion]

All I see is a black screen with a big white x.

[mark]

thats an easy challenge - the white X on a black background

[mark]

not sure if its too early to ask for hints or not, please say if it is.  

i have particles flocking from the grid to the sphere.  heres what i need to work out:

1. i can only flock all points on the grid.  you have 10 cones, which means you must have somehow grouped only 10 points to flock? a 3x3 grid is 9 points so you cant possibly be using all points in a grid.

2. similarly i cant control which points on the sphere the particles will flock to.  suspect this is related to #1.

3. as for the rotation, well im guessing i need to align the cones to the normals of the sphere.. working on that

[halion]

This is what I've been thinking.  Grid as your source, the grid uses a impulse birth rate of 10 at frame 1 only.  As for the rotation I was thinking something with the primitive sop.   I don't know I'll figure something out.... maybe.  

Scratch the primitive plane.

[bobster]

Sure Mark, clues are fine.  Regardless of what the grid is you can emit from surfaces instead of points and then you can control exactly how many points you what, Impusle Activation $FF==1 Impusle Birth
Rate 10.  I'm attracting particles to the sphere randonly, so they specify where they're going to hit based on the drag and interact.  The key to this effect lies in SOPs with the Ray SOP.

[Lukich]

sorry, second take.  Mine was done with CHOPs.

Attached Files

•  challenge.mov   74.92K   748 downloads

[bobster]

Nice Lukich,

CHOPs huh, interesting.  I can't wait to see your hip file.  Let's post the hips once we get more responses.