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makeFrame (projmat :: Mat 4 4 Float)
(vertexstream :: PrimitiveStream Triangle (Vec 4 Float,Vec 2 Float))
= imageFrame (emptyDepthImage 1, emptyColorImage navy)
`overlay` fragments
where
fragments =
vertexstream
& mapPrimitives (\(x,uv) -> (scale 0.5 (projmat *. x), x, uv))
& rasterizePrimitives (TriangleCtx CullNone PolygonFill NoOffset LastVertex) (Smooth,Smooth)
& mapFragments (\((x,uv) :: (Vec 4 Float,Vec 2 Float)) -> x) -- HERE !!!!
& accumulateWith (DepthOp Less True, ColorOp NoBlending (V4 True True True True))
main = renderFrame $
makeFrame (Uniform "MVP")
(fetch_ "stream4" (Attribute "position4", Attribute "vertexUV"))
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