[IronPython] XNA and how to specify the type arguments explicitly

[Michael Foord]

On 02/02/2010 10:23, Richard Steventon wrote:
> A newbie here.  I am trying to use the XNA infrastructure to render
> some data, since all I need is points and colored triangles and a
> movable camera.
>
> Code snippet:
>      def SetupVerticies(self):
>          l = Array.CreateInstance(VertexPositionColor,6)
>          l[0] = VertexPositionColor(Vector3(0., 0., 0.), Color.White)
>          l[1] = VertexPositionColor(Vector3(5., 0., 0.), Color.White)
>          l[2] = VertexPositionColor(Vector3(10., 0., 0.), Color.White)
>          l[3] = VertexPositionColor(Vector3(5., 0., -5.), Color.White)
>          l[4] = VertexPositionColor(Vector3(0., 0., 0.), Color.White)
>          l[5] = VertexPositionColor(Vector3(10., 0., -5.), Color.White)
>          self.vertices = l
>
>      def CopyTerrainToGraphicsBuffers(self):
>          self.VertexBuffer = VertexBuffer(self.graphics.GraphicsDevice, \
>              len(self.vertices) * VertexPositionColor.SizeInBytes, \
>              BufferUsage.WriteOnly)
>          self.VertexBuffer.SetData(self.vertices)
>
> This dies with:
> TypeError: The type arguments for method 'SetData' cannot be inferred
> from the usage. Try specifying the type arguments explicitly.
>
>
> Any idea how to do this ?
>    

Try this:

self.VertexBuffer.SetData[Array[VertexPositionColor]](self.vertices)

Michael
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>    


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