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shadowMapSize = 512
triangleCtx = TriangleCtx CullNone PolygonFill NoOffset LastVertex
gaussFilter7 :: [(Float, Float)]
gaussFilter7 =
[ (-3.0, 0.015625)
, (-2.0, 0.09375)
, (-1.0, 0.234375)
, (0.0, 0.3125)
, (1.0, 0.234375)
, (2.0, 0.09375)
, (3.0, 0.015625)
]
gaussFilter9 :: [(Float, Float)]
gaussFilter9 =
[ (-4.0, 0.05)
, (-3.0, 0.09)
, (-2.0, 0.12)
, (-1.0, 0.15)
, (0.0, 0.16)
, (1.0, 0.15)
, (2.0, 0.12)
, (3.0, 0.09)
, (4.0, 0.05)
]
blurCoefficients :: [(Float, Float)]
blurCoefficients = gaussFilter9
blur :: [(Float, Float)] -> Image 1 ('Color (Vec 4 Float)) -> FrameBuffer 1 '[ 'Color (Vec 4 Float) ]
blur coefficients img = filter1D dirH (PrjImage (filter1D dirV img))
where
dirH v = V2 (v / shadowMapSize) 0.0
dirV v = V2 0.0 (v / shadowMapSize)
-- todo -- filter1D :: (Float -> Vec 2 Float) -> Image 1 ('Color (Vec 4 Float)) -> FrameBuffer 1 '[ 'Color (Vec 4 Float) ]
filter1D dir img = accumulate accCtx frag
(rasterizePrimitives triangleCtx ((NoPerspective)) prims) clearBuf
where
accCtx = ((ColorOp NoBlending (V4 True True True True)))
clearBuf = FrameBuffer ((ColorImage @1 (V4 0 0 0 0.0)))
-- vert :: Vec 2 Float -> VertexOut (Vec 2 Float)
vert ((uv)) = (pos, uv')
where
uv' = uv *! 0.5 +! 0.5
pos = V4 uv%x uv%y 1.0 1.0
prims = mapPrimitives vert (fetch "postSlot" ((Attribute "position")) :: PrimitiveStream Triangle ((Vec 2 Float)))
-- frag :: FragmentShader (Vec 2 Float -> Color (Vec 4 Float))
frag ((uv)) = ((sample))
where
tex = Texture2D (V2 shadowMapSize shadowMapSize) img
smp = Sampler LinearFilter ClampToEdge tex
sample = foldr1 (\a b -> a + b) [ texture2D smp (uv + dir ofs) *! coeff
| (ofs, coeff) <- coefficients
]
moments :: FrameBuffer 1 '[Depth Float, Color (Vec 4 Float)]
moments = accumulate accCtx frag (rasterizePrimitives triangleCtx ((Smooth)) prims) clearBuf
where
accCtx = (DepthOp Less True, ColorOp NoBlending (V4 True True True True))
clearBuf = FrameBuffer (DepthImage @1 1000, ColorImage @1 (V4 0.0 0.0 0.0 1.0{-todo: use 1-}))
lightMatrix = Uniform "lightMatrix" :: Mat 4 4 Float
modelMatrix = Uniform "modelMatrix" :: Mat 4 4 Float
-- vert :: ((Vec 3 Float)) -> ((Float
vert ((pos)) = (lightPos, depth)
where
lightPos = lightMatrix *. modelMatrix *. v3FToV4F pos
depth = lightPos%z
prims = mapPrimitives vert (fetch "geometrySlot" ((Attribute "position" :: Vec 3 Float)))
-- frag :: Float -> (Depth Float,Color (Vec 4 Float))
frag ((depth)) = (depth, V4 moment1 moment2 0 1)
where
dx = dFdx depth
dy = dFdy depth
moment1 = depth
moment2 = depth *! depth +! 0.25 *! (dx *! dx +! dy *! dy)
{-
depth :: FrameBuffer 1 (Depth Float, Color (Vec 4 Float))
depth = accumulate accCtx PassAll frag (Rasterize triangleCtx prims) clearBuf
where
accCtx = accumulationContext (DepthOp Less True, ColorOp NoBlending (V4 True True True True))
clearBuf = FrameBuffer (DepthImage @1 1000, ColorImage @1 (V4 0.0 0.0 0.0 1.0))
lightMatrix = Uniform "lightMatrix" :: Mat 4 4 Float
modelMatrix = Uniform "modelMatrix" :: Mat 4 4 Float
vert :: Vec 3 Float -> VertexOut Float
vert pos = VertexOut lightPos 1 () (Smooth depth)
where
lightPos = lightMatrix *. modelMatrix *. v3FToV4F pos
depth = lightPos%z
prims = Transform vert (fetch "geometrySlot" Triangle (Attribute "position" :: Vec 3 Float))
frag :: FragmentShader (Float -> (Depth Float, Color (Vec 4 Float)))
frag = FragmentShaderRastDepth $ \depth -> (V4 depth 0 0 1)
vsm :: FrameBuffer 1 (Depth Float, Color (Vec 4 Float))
vsm = accumulate accCtx PassAll frag (Rasterize triangleCtx prims) clearBuf
where
accCtx = accumulationContext (DepthOp Less True, ColorOp NoBlending (V4 True True True True))
cameraMatrix = Uniform "cameraMatrix" :: Mat 4 4 Float
lightMatrix = Uniform "lightMatrix" :: Mat 4 4 Float
modelMatrix = Uniform "modelMatrix" :: Mat 4 4 Float
lightPosition = Uniform "lightPosition" :: Vec 3 Float
shadowMap = Texture2D (V2 shadowMapSize shadowMapSize) (PrjImageColor moments)
shadowMapBlur = Texture2D (V2 shadowMapSize shadowMapSize) (PrjImage blurredMoments)
where
blurredMoments = blur blurCoefficients (PrjImageColor moments)
sampler = Sampler LinearFilter ClampToEdge shadowMapBlur
frag :: FragmentShader ((Vec 3 Float, Vec 4 Float, Vec 3 Float) -> (Depth Float, Color (Vec 4 Float)))
frag = FragmentShaderRastDepth $ \(worldPos, lightPos, worldNormal) -> (luminance)
where
clampUV x = clampS x 0.0 1.0
scaleUV x = x *! 0.5 +! 0.5
lightU = lightPos%x
lightV = lightPos%y
lightDepth = lightPos%z
lightW = lightPos%w
uv = clampUV (scaleUV ((V2 lightU lightV) /! lightW))
val = texture2D sampler uv
moment1 = val%x
moment2 = val%y
variance = max 0.002 (moment2 -! moment1 *! moment1)
distance = max 0.0 (lightDepth -! moment1)
lightProbMax = variance /! (variance +! distance *! distance)
lambert = max 0.0 (dot worldNormal (normalize (lightPosition - worldPos)))
uv' = uv -! 0.5
spotShape = 1.0 -! length uv *! 4.0
intensity = max 0 (spotShape *! lambert)
val2 = scaleUV (round (uv' *! 10.0)) *! intensity
spotR = val2%x
spotG = val2%y
luminance = (V4 spotR spotG intensity 1.0) *! pow lightProbMax 2.0
clearBuf = FrameBuffer ( DepthImage @1 1000
, ColorImage @1 (V4 0.1 0.2 0.6 1))
vert :: (Vec 3 Float, Vec 3 Float) -> VertexOut (Vec 3 Float, Vec 4 Float, Vec 3 Float)
vert (localPos, localNormal) = VertexOut viewPos 1 () (Smooth worldPos%xyz, ((Smooth)) lightPos, ((Smooth)) worldNormal)
where
worldPos = modelMatrix *. v3FToV4F localPos
viewPos = cameraMatrix *. worldPos
lightPos = lightMatrix *. worldPos
worldNormal = normalize ((modelMatrix *. v3FToV4F localNormal)%xyz)
prims = Transform vert (fetch "geometrySlot" Triangle (Attribute "position" :: Vec 3 Float, Attribute "normal" :: Vec 3 Float))
sm :: FrameBuffer 1 (Depth Float, Color (Vec 4 Float))
sm = accumulate accCtx PassAll frag (Rasterize triangleCtx prims) clearBuf
where
accCtx = accumulationContext (DepthOp Less True, ColorOp NoBlending (V4 True True True True))
clearBuf = FrameBuffer (DepthImage @1 1000, ColorImage @1 (V4 0.1 0.2 0.6 1))
cameraMatrix = Uniform "cameraMatrix" :: Mat 4 4 Float
lightMatrix = Uniform "lightMatrix" :: Mat 4 4 Float
modelMatrix = Uniform "modelMatrix" :: Mat 4 4 Float
lightPosition = Uniform "lightPosition" :: Vec 3 Float
vert :: (Vec 3 Float, Vec 3 Float) -> VertexOut (Vec 3 Float, Vec 4 Float, Vec 3 Float)
vert (localPos, localNormal) = VertexOut viewPos 1 () (Smooth (worldPos%xyz), ((Smooth)) lightPos, ((Smooth)) worldNormal)
where
worldPos = modelMatrix *. v3FToV4F localPos
viewPos = cameraMatrix *. worldPos
lightPos = lightMatrix *. worldPos
worldNormal = normalize ((modelMatrix *. v3FToV4F localNormal)%xyz)
prims = Transform vert (fetch "geometrySlot" Triangle (Attribute "position" :: Vec 3 Float, Attribute "normal" :: Vec 3 Float))
--shadowMap :: Exp Obj (Texture Tex2D SingleTex (Regular Float) Red)
shadowMap = Texture2D (V2 shadowMapSize shadowMapSize) (PrjImageColor depth)
sampler = Sampler PointFilter ClampToEdge shadowMap
frag :: FragmentShader ((Vec 3 Float, Vec 4 Float, Vec 3 Float) -> (Depth Float, Color (Vec 4 Float)))
frag = FragmentShaderRastDepth $ \(worldPos, lightPos, worldNormal) -> (luminance)
where
lightU = lightPos%x
lightV = lightPos%y
lightDepth = lightPos%z
lightW = lightPos%w
clampUV x = clampS x 0 1
scaleUV x = x *! 0.5 +! 0.5
uv = clampUV (scaleUV ((V2 lightU lightV) /! lightW))
surfaceDistance = (texture2D sampler uv)%x
lightPortion = if (lightDepth <= surfaceDistance +! 0.01) then 1 else 0
lambert = max 0 (dot worldNormal (normalize (lightPosition - worldPos)))
--intensity = lambert @* lightPortion
--luminance = pack' (V4 intensity intensity intensity (floatF 1))
uv' = uv -! 0.5
spotShape = 1 -! length uv' *! 4
intensity = max 0 (spotShape *! lambert)
val = scaleUV (round (uv' *! 10)) *! intensity
spotR = val%x
spotG = val%y
luminance = (V4 spotR spotG intensity 1) *! lightPortion
main = ScreenOut sm
-}
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