Hobby Public Radio

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tuturto

Host ID: 364

Eternal tinkerer of code, who occasionally writes things down at https://engineersjourney.wordpress.com/ or contributes to hylang project at https://github.com/hylang/hy

hpr2633 :: Elm - First Impressions

• Official site: http://elm-lang.org/
• Online package repository: http://package.elm-lang.org/
• please-focus (package for writing lenses): http://package.elm-lang.org/packages/SwiftsNamesake/please-focus/latest
• json-extra (for working with json): http://package.elm-lang.org/packages/elm-community/json-extra/latest
• elm-decode-pipeline (another library for decoding json): http://package.elm-lang.org/packages/NoRedInk/elm-decode-pipeline/latest

hpr2618 :: Yesod - First Impressions

First place to start is probably Yesod’s web site at: https://www.yesodweb.com/

Often recommended environment for developing Haskell programs is Stack: https://docs.haskellstack.org/en/stable/README/

My road to Haskell started with Learn You a Haskell for Great Good: http://learnyouahaskell.com/ and going through lecture notes of CIS 194: http://www.seas.upenn.edu/%7Ecis194/spring13/lectures.html

hpr2608 :: BattleTech

Following links might help you to get more familiar with the game.

• Manufacturer’s website: https://bg.battletech.com/

• Forums, where fans have discussions about the game: https://bg.battletech.com/forums/

• Sarna, extensive wiki: http://www.sarna.net/wiki/Main_Page

hpr2598 :: Calculating planetary orbits in Haskell

Function signatures (it might or might not be helpful to have these at hand while listening):

• Helpers:

    radToDeg :: Floating a => a -> a
    degToRad :: Floating a => a -> a
    clamp :: Float -> Float

• Time:

    day :: Int -> Int -> Int -> Float -> Day Float

• Orbital parameters:

    longitudeOfAscendingNode :: Orbit body center => body -> center -> Day d -> LongAscNode body center
    inclinationToEcliptic :: Orbit body center => body -> center -> Day d -> InclToEcl body center
    argumentOfPeriapsis :: Orbit body center => body -> center -> Day d -> ArgPeri body center
    semiMajorAxis :: Orbit body center => body -> center -> Day d -> SemiMajor body center
    eccentricity :: Orbit body center => body -> center -> Day d -> Ecc body center
    meanAnomaly :: Orbit body center => body -> center -> Day d -> MeanAno body center

• Calculating location on orbital plane:

    eccAnomaly :: MeanAno a b -> Ecc a b -> EccAnomaly a b
    trueAnomaly :: EccAnomaly a b -> Ecc a b -> TrueAnomaly a b
    dist :: EccAnomaly a b -> Ecc a b -> SemiMajor a b -> Distance a b

• Translating between coordinate systems:

    toEclCoord :: TrueAnomaly a b -> Distance a b -> LongAscNode a b -> ArgPeri a b -> InclToEcl a b -> EclCoord a b
    toEqCoordinates :: EclCoord body Earth -> Day Float -> EqCoord body

Some helpful links:

• Guide by Paul Schlyter - http://www.stjarnhimlen.se/comp/ppcomp.html
• Sample calculations by Paul Schlyter - http://www.stjarnhimlen.se/comp/tutorial.html
• tuturto's blog post - https://engineersjourney.wordpress.com/2018/06/29/planetary-orbits-and-haskell/
• Definition of orbital elements in Wikipedia - https://en.wikipedia.org/wiki/Orbital_elements
• Units of angle in Wikipedia - https://en.wikipedia.org/wiki/Degree_(angle) and https://en.wikipedia.org/wiki/Radian

hpr2593 :: Intro to De Bellis Antiquitatis

In this episode tuturto paints rambles about De Bellis Antiquitatis while painting more toy soldiers, so expect long pauses and missing thoughts as he tries to do two things at the same time.

De Bellis Antiquitatis (or DBA for short): https://en.wikipedia.org/wiki/De_Bellis_Antiquitatis

While the original site seems to be gone, WADBAG unofficial guide to DBA can be found at: http://www.wargames-romania.ro/wordpress/wargames/de-bellis-antiquitatis-dba/the-unofficial-guide-to-dba/

hpr2588 :: Miniature painting

tuturto rambles about miniature painting while painting some ancient British units (horses for chariots to be specific) for De Bellis Antiquitatis.

• De Bellis Antiquitatis is a quick to learn, quick to play war game for ancient period (and a bit more) - https://en.wikipedia.org/wiki/De_Bellis_Antiquitatis

• Army Painter is paint, brush and basing manufacturer - https://www.thearmypainter.com/

• Osprey Publishing specializes in publishing books on modeling and history - https://ospreypublishing.com/

hpr2524 :: General problem solver

• Building Problem Solvers by Kenneth D. Forbus and Johan de Kleer: http://www.qrg.northwestern.edu/BPS/readme.html

• Paradigms of Artificial Intelligence Programming by Peter Norvig: https://github.com/norvig/paip-lisp

• Engineer's Journey, tuturto's blog: https://engineersjourney.wordpress.com/

• Blog entry about solving n-queens puzzle with general problem solver: https://engineersjourney.wordpress.com/2018/03/09/n-queens-puzzle-solved-in-hy-and-cps/

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