How do you set Material IDs on a spline?

[magicm]

setMaterialID <splineShape> <spline_index> <seg_index> <matID>
Sets the material ID of the specified spline segment.

getMaterialID <splineShape> <spline_index> <seg_index>
Gets the material ID of the specified spline segment.

Be sure to check the online reference that ships with max. Some people find it hard to use, but I think it's an invaluable resource. I used the search function to find this information : "id near segment". near is a special keyword that you can use to find two or more words that are near each other. Pressing the arrow button next to the search field displays a popup menu with some other keywords as well.

- Martijn

[Billibong]

Martijn,

Sorry to be so thick, I did find this in the help but I don't understand how it's used. What is the spline_index and seg_index? Could you give me an example? I just want tro change the material ID to =4.

select $ --Editable spline selected
subobjectLevel = 3 --subobject "spline" selected


Thanks
bill

[magicm]

here's a quick example how to use the setMaterialID function:


-- create a circle
c = circle radius:10

-- convert the circle to an editable spline
converttosplineshape c

-- set the material ID for the first (and only) spline, and its first segment to 1
setMaterialID c 1 1 1

-- or: set the 4 segments in the circle to material ID 5,6,7 and 8
for s = 1 to 4 do-- process all 4 segments of the circle
(
setMaterialID c 1 s (s+4) -- set material ID of segment (s) to (s + 4)
)

Hope this helps,
Martijn

[Billibong]

Martijn,

Thank you very much for taking the time to explain, now I get it!

c = circle radius:10 --Create a circle
converttosplineshape c --Convert to spline
setMaterialID c 1 1 5 --To set segment 1, of spline1, to Material ID 5
UpdateShape c --To update the screen
ModPanel.addModToSelection (Extrude ()) ui:on --Extrude it
$.modifiers[#Extrude].mapcoords = on
$.modifiers[#Extrude].useShapeIDs = on
$.modifiers[#Extrude].matIDs = on

Thanks again
Billibong

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