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lineVertexStream = fetchArrays ((concat $
[[V3 i (-3.0) 0.0, V3 i 3.0 0.0] | i <- [-3.0..3.0] ]
++ [[V3 (-3.0) i 0.0, V3 3.0 i 0.0] | i <- [-3.0..3.0] ]))
clear = FrameBuffer (DepthImage @1 1000, ColorImage @1 white) -- ...
lines = LineCtx 1.0 LastVertex
colorFragmentCtx = accumulationContext (DepthOp Less True, ColorOp NoBlending (V4 True True True True))
m = Uniform "Mouse" :: Vec 2 Float
rasterizeWith = rasterizePrimitives
mapFragments2 s fs = accumulate colorFragmentCtx (\((a)) -> ((fs a))) s clear
transform s f = mapPrimitives (\((p)) -> let v = v3FToV4F p in (f v, v)) s
trans :: Vec 4 Float -> Vec 4 Float
trans (V4 x y _ _) = V4 (t * x) (0.5 * m%x * x*y) (t * y) 1.0
where t = m%y
rotate' v = (Uniform "MVP" :: Mat 4 4 Float) *. v
main = lineVertexStream
`transform` ((scale 0.1 . rotate') . trans)
& rasterizeWith lines ((Smooth))
`mapFragments2` id
& ScreenOut
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