22 Feb
2004
22 Feb
'04
10:49 a.m.
On Sunday 22 Feb 2004 10:03 am, Hans Nikolaus Beck wrote:
Hi,
I have the following problem:
Vertex3 ist defined as
data Vertex3 a = Vertex3 a a a
a is defined as
class a VertexComponent
But I fail to write to following correct
type GLVertex = (GLfloat, GLfloat, GLfloat)
toVertex :: GLVertex -> Vertex3 a <<<<<<<< how do it correctly toVertex (x,y,z) = Vertex3 x y z
The compiler says "cannot infer a with type GLFloat" or something like this.... I don't understand.
Thank you for help
The type signature is wrong. Try this.. toVertex :: GLVertex -> Vertex3 GLfloat or perhaps.. toVertex :: (a,a,a) -> Vertex3 a Regards -- Adrian Hey