Re: [Haskell-cafe] Stack Overflow?

11 Nov 2010


      It was basically that. I was doing TransformedMatrix = TransformedMatrix *
TransformMatrrix
and should have been doing Transformed Matrix = RotatedMatrix *
TransforrmMatrix

On Thu, Nov 11, 2010 at 10:03 AM, Dmitry Astapov  wrote:
...
On Thu, Nov 11, 2010 at 4:58 PM, Ben Christy 
wrote:
...
I have implemented a scene graph in Haskell and I have a problem. I walk
down the scenegraph and at each node I recalculate translation matrix and
pass it to each child. Well it seems to be causing a stack overflow and I
am
lost as to how to resolve the issue without issue a state variable of
some
kind to hold a "matrix stack" as is common in imperative implementations
of
scene graphs. When I run the program fromghci I get
[snip]
Matrix4x4 {i1j1 = <interactive>: <<loop>>
<interactive>: interrupted
Check the expression for i1j1 - seems like it boils down to "let x = x in
x"
--
Dmitry Astapov