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Author Topic: Request - Params for Spline section with current Material  (Read 562 times)

Alex.S

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Request - Params for Spline section with current Material
« on: March 13, 2017, 11:15:37 AM »
In arithmetic nodes we have options for spline length, percentage along the spline, and also for the section too.

It'd be really useful to add a further submode for 'Material Sub-Spline'. So for example this would allow us to scale mapping appropriately along a spline sub material for example. For example I construct a wall along a spline, and I want to put advertising on segments with spline mat id 2. But the default segments are only a quarter of the length mapping I want for the advertisement. This way I could scale things correctly easily.

That said knowing how many segments will be in that section (another others) too could be super useful, as even though a line is say 10m long, if the section is 2.5m long, there could be 4 or 5 segments depending on where the spline starts. I guess I'm coming round to it'd be nice to have a post 'geometry' pass for uvw?

Sorry a bit rambling, unsure as to what the best way to approach the situation is...

(At present I modify the uvw afterwards to fix UVW issues)

Michal Karmazín

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Re: Request - Params for Spline section with current Material
« Reply #1 on: March 13, 2017, 12:11:31 PM »
Hi,

Thanks for your suggestion, we'll evaluate it. Currently, for these purposes you can use the UVW XForm Operator in combination with the Conditional Operator (in the sample scene set to Spline - Material ID - Equal to 2). Attaching the sample scene, hope you'll find useful.

Best regards,

Alex.S

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Re: Request - Params for Spline section with current Material
« Reply #2 on: March 14, 2017, 11:27:08 AM »
Increasing the tiling it is already possible yes, the issue is if I wish to stretch it.

Imagine I am building a wall. And I wish to put advertising on it. Each segment only uses 1/2 of a UVW tile for the advert for example. And there are 5 segments in total with the length of spline we are working with, I would want to scale it so there are 2 complete tiles there, rather than 2.5 tiles (0.5 x 5). I am already able to figure it out over the length of the entire spline, but not over a section with a spline material id. As usually I would want to use the spline mat id to signify which parts should show advertisements.

So at present things end up with half a tile in places and I have to fix these with uvw unwrap modifiers afterwards.
« Last Edit: March 14, 2017, 11:29:30 AM by Alex.S »

Michal Karmazín

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Re: Request - Params for Spline section with current Material
« Reply #3 on: March 14, 2017, 03:55:58 PM »
Hi,

In such case, the Apply Box Mapping feature might be an option. Attaching a sample scene. Hope that helps.

Best regards,

Alex.S

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Re: Request - Params for Spline section with current Material
« Reply #4 on: March 17, 2017, 03:22:54 PM »
There are issues with that feature at present creating strange mapping with more than basic objects. I already have the logic to do these things over an entire spline anyway, The issue is just not being able to do it on a subsection by Spline ID because the appropriate variables are not present.

Also using the limit by spline and having separate generators isn't viable due to these issues http://forum.itoosoft.com/index.php?topic=4353.0

Also if I have many options based on spline id, then multiple generators is incredibly inefficient.
« Last Edit: March 17, 2017, 03:25:45 PM by Alex.S »