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added normals to shader

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This commit is contained in:
Stefan Dresselhaus
2014-01-06 21:13:58 +01:00
parent db4d55b811
commit 2193a0e7fd
5 changed files with 42 additions and 11 deletions
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29
src/Main.hs
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@ -12,7 +12,7 @@ import Control.Monad.RWS.Strict (RWST, ask, asks,
evalRWST, get, liftIO,
modify, put)
import Control.Monad.Trans.Maybe (MaybeT (..), runMaybeT)
import Data.Distributive (distribute)
import Data.Distributive (distribute, collect)
import Data.List (intercalate)
import Data.Maybe (catMaybes)
import Foreign (Ptr, castPtr, with)
@ -30,6 +30,8 @@ import Render.Misc (checkError,
lookAt, up)
import Render.Render (initRendering,
initShader)
import Control.Lens ((^.),transposeOf)
import Data.Traversable (traverse)
--------------------------------------------------------------------------------
@ -66,6 +68,7 @@ data State = State
, shdrProjMatIndex :: !GL.UniformLocation
, shdrViewMatIndex :: !GL.UniformLocation
, shdrModelMatIndex :: !GL.UniformLocation
, shdrNormalMatIndex :: !GL.UniformLocation
--- the map
, stateMap :: !GL.BufferObject
, mapVert :: !GL.NumArrayIndices
@ -124,7 +127,7 @@ main = do
initRendering
--generate map vertices
(mapBuffer, vert) <- getMapBufferObject
(ci, ni, vi, pri, vii, mi) <- initShader
(ci, ni, vi, pri, vii, mi, nmi) <- initShader
let zDistClosest = 10
zDistFarthest = zDistClosest + 20
@ -159,6 +162,7 @@ main = do
, shdrProjMatIndex = pri
, shdrViewMatIndex = vii
, shdrModelMatIndex = mi
, shdrNormalMatIndex = nmi
, stateMap = mapBuffer
, mapVert = vert
, stateFrustum = frust
@ -425,8 +429,9 @@ draw = do
state <- get
let xa = stateXAngle state
ya = stateYAngle state
(GL.UniformLocation proj) = shdrProjMatIndex state
(GL.UniformLocation vmat) = shdrViewMatIndex state
(GL.UniformLocation proj) = shdrProjMatIndex state
(GL.UniformLocation nmat) = shdrNormalMatIndex state
(GL.UniformLocation vmat) = shdrViewMatIndex state
vi = shdrVertexIndex state
ni = shdrNormalIndex state
ci = shdrColorIndex state
@ -438,16 +443,29 @@ draw = do
zDist = stateZDist state
liftIO $ do
--(vi,GL.UniformLocation proj) <- initShader
GL.clearColor GL.$= GL.Color4 0.5 0.1 1 1
GL.clear [GL.ColorBuffer, GL.DepthBuffer]
checkError "foo"
--set up projection (= copy from state)
with (distribute $ frust) $ \ptr ->
glUniformMatrix4fv proj 1 0 (castPtr (ptr :: Ptr (M44 CFloat)))
checkError "foo"
--set up camera
let ! cam = getCam (camX,camY) zDist xa ya
with (distribute $ cam) $ \ptr ->
glUniformMatrix4fv vmat 1 0 (castPtr (ptr :: Ptr (M44 CFloat)))
checkError "foo"
--set up normal--Mat transpose((model*camera)^-1)
let normal = (case inv33 ((fmap (^._xyz) cam) ^. _xyz) of
(Just a) -> a
Nothing -> eye3) :: M33 CFloat
nmap = (collect (fmap id) normal) :: M33 CFloat --transpose...
with (distribute $ nmap) $ \ptr ->
glUniformMatrix3fv nmat 1 0 (castPtr (ptr :: Ptr (M33 CFloat)))
checkError "nmat"
GL.bindBuffer GL.ArrayBuffer GL.$= Just map'
GL.vertexAttribPointer ci GL.$= fgColorIndex
@ -456,6 +474,7 @@ draw = do
GL.vertexAttribArray ni GL.$= GL.Enabled
GL.vertexAttribPointer vi GL.$= fgVertexIndex
GL.vertexAttribArray vi GL.$= GL.Enabled
checkError "beforeDraw"
GL.drawArrays GL.Triangles 0 numVert
checkError "draw"