>> ... to be able to use texturing UVs to drive the location. Kinda like a UV to Location but for polygons. Beating a dead horse for sure but this stuff is so mysterious I can't help wondering...
Maybe ask Gustavo how he approached his UV to Position ICE magic? https://vimeo.com/36464429 On Wed, Jun 12, 2013 at 11:52 AM, Vincent Fortin <[email protected]> wrote: > Thanks guys for your answers. That pretty much confirms my suspicions > about locations in ICE. Oh well, hopefully I can make it to the next beta > and make a few suggestions. > > Another approach that would serve the same purpose in some cases is to be > able to use texturing UVs to drive the location. Kinda like a UV to > Location but for polygons. Beating a dead horse for sure but this stuff is > so mysterious I can't help wondering... > > > On Wed, Jun 12, 2013 at 4:18 AM, Ahmidou Lyazidi <[email protected]>wrote: > >> Being able to store them as static ice atttribute and eventuallycache >> them would be usefull too ! >> I'm also curious about why we don't have a deeper access to locations, >> could some SI dev elaborate about that? >> Is there still rooms for improvement? >> >> Cheers. >> >> ----------------------------------------------- >> Ahmidou Lyazidi >> Director | TD | CG artist >> http://vimeo.com/ahmidou/videos >> http://www.cappuccino-films.com >> >> >> 2013/6/12 Vladimir Jankijevic <[email protected]> >> >>> +100 >>> It would be great to have access to this data. The ability to build my >>> own locations would be useful sometimes :) >>> It's a shame we haven't seen any development in that area :( >>> >>> >>> On Wed, Jun 12, 2013 at 1:37 AM, Raffaele Fragapane < >>> [email protected]> wrote: >>> >>>> locators are more or less that, barycentric coordinates coupled with a >>>> facet index kinda thing. >>>> Why they are not exposed atomically isn't 100% clear. It might be some >>>> eval issues with those atoms if they were to be exposed, just lack of >>>> foresight in the implementation somewhere back then, simply something >>>> missing that might one day come, or they might look up additional data of >>>> sorts (accelstruct?) and can't be decoupled from that. >>>> >>>> Regardless, they can't be cracked open that I know of, not to read from >>>> them more granular-ly, nor to write directly into or over one. >>>> >>>> >>>> On Wed, Jun 12, 2013 at 1:46 PM, Vincent Fortin <[email protected]>wrote: >>>> >>>>> Figured I'd start a new thread. This has been arousing my curiosity >>>>> for a while and I need your wisdom :-) >>>>> >>>>> In Houdini I build locations by providing a polygon index and what is >>>>> called a "uv parametric location". The term uv is misleading here. All it >>>>> is, is a coordinate on each polygon plane. >>>>> >>>>> Softimage's sdk calls it "subtriangle barycentric weights". So along >>>>> with the polygon index and the vertex indices I managed to build my >>>>> location in python. I didn't test this thoroughly but I seem to be getting >>>>> an equivalent to what I'm used to in Houdini. >>>>> >>>>> With regard to recreate this in ICE: >>>>> 1) Do we have access to the necessary data? (that is, polygon index, >>>>> subtriangle indices and the normalized weights on the triangle?) >>>>> 2) How would we go about assembling it? >>>>> >>>>> I understand this all sounds a bit abstract. Like everyone I use >>>>> locations a lot in ICE, they're amazing and manipulating them is easy. >>>>> Maybe there is no need for exposing lower-level functionalities. >>>>> I'm merely experimenting here to see how far I can push them. An >>>>> example would be to access those barycentric coordinates and, say, slide a >>>>> particle on a polygon without having to resort to the Get Closest Location >>>>> node. >>>>> >>>>> Thoughts? >>>>> >>>>> >>>> >>>> >>>> -- >>>> Our users will know fear and cower before our software! Ship it! Ship >>>> it and let them flee like the dogs they are! >>>> >>> >>> >>> >>> -- >>> --------------------------------------- >>> Vladimir Jankijevic >>> Technical Direction >>> >>> Elefant Studios AG >>> Lessingstrasse 15 >>> CH-8002 Zürich >>> >>> +41 44 500 48 20 >>> >>> www.elefantstudios.ch >>> --------------------------------------- >>> >> >> >
