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added spec lighting

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This commit is contained in:
Nicole Dresselhaus 2014-10-25 00:59:33 +02:00
parent 64dbcca6ef
commit 90fad1366b
1 changed files with 19 additions and 11 deletions
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30
src/Scene/Renderer.hs
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@ -38,10 +38,10 @@ render w h s index = PixelRGB8 (ci cr) (ci cg) (ci cb)
Just c@(Collision pos _ _ obj) ->
-- ambient lighting
((ambColor . ambientLight $ s) * (materialAmbience . getMaterial $ obj))
-- + diffuse lighting
+ (foldl1 (+) $ (diffuse c s) <$> sceneLights s)
-- + reflections - TODO
ray = camRay x y (sceneCamera s)
-- + diffuse/spec lighting
+ (foldl1 (+) $ (diffuseAndSpec c s co) <$> sceneLights s)
-- + reflect -- TODO
ray@(Ray co _) = camRay x y (sceneCamera s)
y = fromIntegral $ index `mod` w
x = fromIntegral $ index `div` w
ci = floor . (clamp 0 255) . (*255)
@ -49,17 +49,26 @@ render w h s index = PixelRGB8 (ci cr) (ci cg) (ci cb)
--Ray (eye cam) $ rotCam x y w h (center cam - eye cam) (up cam) (fovy cam)
--cam = sceneCamera s
diffuse :: Collision -> Scene -> Light -> V3 Float
diffuse (Collision pos n _ obj) s (Light lpos color int) =
-- | Collision-Information, Scene, view-position, light
diffuseAndSpec :: Collision -> Scene -> V3 Float-> Light -> V3 Float
diffuseAndSpec (Collision pos n _ obj) s co (Light lpos color int) =
case blocked of
Nothing -> ill
Nothing -> diff + spec
Just (Collision _ _ dist _) -> if dist < norm lightdir
then
V3 0 0 0 --light is blocked -> no lighting from here.
else
ill
diff + spec
where
ill = i * dot n (normalize lightdir) *^ color * materialDiffuse mat
spec = if dot n (normalize lightdir) < 0 || dot r v < 0
then V3 0 0 0
else i * (dot r v ** materialShinyness mat) *^ color * materialSpec mat
r = (dot n ld * 2 *^ n) - ld
ld = normalize lightdir
v = normalize $ co - pos
diff = if dot n (normalize lightdir) < 0
then V3 0 0 0
else i * dot n (normalize lightdir) *^ color * materialDiffuse mat
mat = getMaterial obj
blocked = raytrace (Ray pos lightdir) s
lightdir = (lpos - pos)
@ -107,8 +116,7 @@ intersect (Ray ro rd) s@(S (Sphere sc sr _)) = if (d > 0 && int > 0) then
ints = filter (uncurry (&&).(&&&) (>epsilon) (not.isNaN)) [(-b-(sqrt d))/(2*a),(-b+(sqrt d))/(2*a)]
intersect (Ray ro rd) p@(P (Plane pc pn _)) = if det == 0 || t < epsilon
then Nothing
else Just -- $ D.trace (show (det, t, pos))
$ Collision pos pn t p
else Just $ Collision pos pn t p
where
pos = ro + t *^ rd'
det = dot rd' pn