[Haskell-cafe] FRP demos and tutorials page

[Tom Poliquin]

On Monday 10 May 2010 00:08, Jean-Marie Gaillourdet wrote:

>> We have created are a set of demos and tutorials for 
>> FRP ("Conal reactive").   It consists of four demos: the simple furnace,
>> the human controlled furnace, the hybrid robot sim, and the FRP robot sim.  

> since I never took the time to understand frp properly I thought it would
> be helpful to look at some examples. I was able to compile and run the
> first to programs after I managed to find out the dependencies. But I
> failed to compile third one. I just got the a compiler error with
> ghc-6.12.1 on Mac OS X 10.6, see below.
....
....
> .... No instance for (MatrixComponent Double)
....
 > .. and various other complaints about Doubles.

Thanks Jean for trying the examples out!

We'll look into this tomorrow. I think we are down rev a bit
in our OpenGL.
Our Doubles should be GLdoubles to make everybody
happy. We'll upload new code when fixed and let you know.

Tom


On Monday 10 May 2010 00:08, Jean-Marie Gaillourdet wrote:
> Hi,
>
> since I never took the time to understand frp properly I thought it would
> be helpful to look at some examples. I was able to compile and run the
> first to programs after I managed to find out the dependencies. But I
> failed to compile third one. I just got the a compiler error with
> ghc-6.12.1 on Mac OS X 10.6, see below.
>
> Best regards,
> Jean
>
> leibniz:robot_sim jmg$ ./go
> Compiling Generator
> [1 of 2] Compiling Model            ( Model.hs, Model.o )
> [2 of 2] Compiling Main             ( Main.hs, Main.o )
> Linking main ...
> Compiling Player
> [1 of 5] Compiling ReadImage        ( ReadImage.hs, ReadImage.o )
> [2 of 5] Compiling Sprites          ( Sprites.hs, Sprites.o )
> [3 of 5] Compiling ViewSupport      ( ViewSupport.hs, ViewSupport.o )
>
> ViewSupport.hs:32:7:
>     No instance for (MatrixComponent Double)
>       arising from a use of `scale' at ViewSupport.hs:32:7-11
>     Possible fix:
>       add an instance declaration for (MatrixComponent Double)
>     In the expression: scale
>     In the definition of `scal': scal = scale
>
> ViewSupport.hs:100:9:
>     No instance for (NormalComponent Double)
>       arising from a use of `normal' at ViewSupport.hs:100:9-33
>     Possible fix:
>       add an instance declaration for (NormalComponent Double)
>     In a stmt of a 'do' expression: normal (Normal3 nx ny nz)
>     In the second argument of `($)', namely
>         `do { normal (Normal3 nx ny nz);
>               mapM_
>                 (\ ((vx, vy, vz), tcoord)
>                      -> do { texCoord tcoord;
>                              .... })
>                 (zip ([q0] ++ [q1] ++ [q2] ++ [q3]) ts) }'
>     In the expression:
>           renderPrimitive Quads
>         $ do { normal (Normal3 nx ny nz);
>                mapM_
>                  (\ ((vx, vy, vz), tcoord)
>                       -> do { texCoord tcoord;
>                               .... })
>                  (zip ([q0] ++ [q1] ++ [q2] ++ [q3]) ts) }
>
> ViewSupport.hs:102:18:
>     No instance for (TexCoordComponent Double)
>       arising from a use of `texCoord' at ViewSupport.hs:102:18-32
>     Possible fix:
>       add an instance declaration for (TexCoordComponent Double)
>     In a stmt of a 'do' expression: texCoord tcoord
>     In the expression:
>         do { texCoord tcoord;
>                vertex $ Vertex3 vx vy vz }
>     In the first argument of `mapM_', namely
>         `(\ ((vx, vy, vz), tcoord)
>               -> do { texCoord tcoord;
>                         vertex $ Vertex3 vx vy vz })'
>
> ViewSupport.hs:103:18:
>     No instance for (VertexComponent Double)
>       arising from a use of `vertex' at ViewSupport.hs:103:18-23
>     Possible fix:
>       add an instance declaration for (VertexComponent Double)
>     In the first argument of `($)', namely `vertex'
>     In the expression: vertex $ Vertex3 vx vy vz
>     In the expression:
>         do { texCoord tcoord;
>                vertex $ Vertex3 vx vy vz }