- FieldTrip - Haskell.org

Moving from OpenGL to GPU-centric architecture
by Gregory D. Weber 04 Jun '09

04 Jun '09

Greetings! I am a beginner to FieldTrip (which I have not yet even been able to install) and to computer graphics in general (which my questions will probably make obvious). On Mar. 6, Hugo Gomes asked: > Are there any plans to remove the OpenGL dependency on FieldTrip ? Is this > desirable (i can argue that it is) ? and Conal Elliott replied: > Personally, I want to move away from OpenGL to a GPU-centric architecture. Now my questions: Since OpenGL is the only 3D graphics framework that I am familiar with, I am wondering how a "GPU-centric architecture" would be different. Indeed, I was under the impression that OpenGL _is_ an API for controlling the GPU; so another way of putting my question is: if that's not GPU-centric, then what is? And why would that be better? -- ___ ___ __ _ / _ \ / _ \| | | | Gregory D. Weber, Associate Professor / /_\// / | | | /\ | | Indiana University East / /_\\/ /__| | |/ \| | http://mypage.iu.edu/~gdweber/ \____/\_____/\___/\__/ Tel. (765) 973-8420; FAX (765) 973-8550

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Cabal install Errors Solution?
by Kellen J. McClain 15 May '09

15 May '09

I managed to install FieldTrip by changing some of the source code. It seems that the vector-space package is too new, and it just needed to use some different functions, and add a little to the contexts of some functions. However, I'm not sure that the changes I made will preserve functionality because I'm not familiar with any of the code (neither the libraries nor FieldTrip). In any case, the reactive-fieldtrip example as described on the website worked fine. I made a tar.gz of my modified src directory if anyone whats to have a look.

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Cabal installation error
by Guenther Schmidt 06 May '09

06 May '09

Hi all, I'm also having the same error as Kellen. Occurs check: cannot construct the infinite type: s = s -> t When generalising the type(s) for `torus' Günther

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Errors compiling from cabal
by Kellen J. McClain 06 May '09

06 May '09

I tried installing fieldtrip from cabal and I got the following error: src/Graphics/FieldTrip/ParamSurf.hs:65:0: Occurs check: cannot construct the infinite type: s = s -> t When generalising the type(s) for `torus' I'm running ghc-6.10.2. Has anyone seen this error? Thanks

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darcs patch: issue #17: AVector -> Diff
by daniel＠wagner-home.com 11 Mar '09

11 Mar '09

Thu Feb 12 22:23:22 EST 2009 daniel(a)wagner-home.com * issue #17: AVector -> Diff

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FieldTrip and rendering
by Hugo Gomes 06 Mar '09

06 Mar '09

Hello, im a begginer haskell programmer, I currently have a big graphics codebase in C/C++, but since i determined to code only in haskell that i want to continue my work in it, and after a quick look at FieldTrip several questions popped up on my mind. Here they are: Are there any plans to remove the OpenGL dependency on FieldTrip ? Is this desirable (i can argue that it is) ? Are there any plans to use Data.Colour insted of the current color module ? Are there any plans to include Bézier, B-Splines and NURBS geometry ? (these could go into a separate module) Are there any plans to add geometry manipulation functions ? Are there any plans to separate the image part ? (and how about developing a set a image 'noise generation' functions ?, something like a functional libnoise). I don't understand exactly how FieldTrip works because my haskell knowledge is no big deal, but i can see that vertices are being sent to the renderPrimitive (which i guess is a wrapper for the begin/end functions of opengl). Is there a triangulation scheme for the parametric surface being done in those lines ? If yes, is there any way to tune it ? Is FieldTrip still being developed ? Why is this mailing list so quiet ? Im sorry for the long list of questions, im guessing some of these are pretty obvious, and some are probably inconvenient. I promisse i'll try harder next time. Thanks for your time and appreciation.

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darcs patch: issue #18: add an examples/ directory
by daniel＠wagner-home.com 13 Feb '09

13 Feb '09

Thu Feb 12 23:03:43 EST 2009 daniel(a)wagner-home.com * issue #18: add an examples/ directory

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Request/invitation for input on licensing
by Conal Elliott 04 Feb '09

04 Feb '09

In case you haven't seen it, I'm welcoming input about license choice for Reactive & FieldTrip in a blog post, http://conal.net/blog/posts/seeking-advice-on-software-licensing/ . I am especially interested in hearing from the folks on the Reactive & FieldTrip mailing lists. I'd appreciate comments directed to the blog post itself, to keep the discussion from fragmenting. Thanks! - Conal

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Bug report
by Andreas-Christoph Bernstein 03 Feb '09

03 Feb '09

Hi, FieldTrip-0.2.2 fails to compile and says: Not in scope: type constructor or class `AVector' This is because AVector in latest vector-space release has been renamed to Diff. Renaming it in Point3.hs and Point2.hs fixes the problem. Andreas

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2D rendering
by Peter Verswyvelen 21 Jan '09

21 Jan '09

Are there any plans to add rich 2D rendering support to fieldtrip? So that we can have text, lines, fills, curves etc? So that we can get rid of the Render monad in GTK and other libs? Thanks, Peter

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