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Add MatrixHelper folder

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This commit is contained in:
jgk
2021-03-19 21:54:34 +01:00
parent bd7a5c3533
commit 598061d277
3 changed files with 81 additions and 34 deletions
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src/MatrixHelper.hs
+43
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@@ -0,0 +1,43 @@
module MatrixHelper
where
import Geometry
import Linear.Matrix
import Linear.V4
import Graphics.Rendering.OpenGL (GLfloat)
perspectiveMatrix :: Float -> Float -> Point2 -> Point2 -> Point2 -> [GLfloat]
perspectiveMatrix rot zoom (tranx,trany) (winx,winy) (viewFromx,viewFromy) =
let scalMat = Linear.Matrix.transpose $
V4 (V4 (2*zoom/winx) 0 0 (0::GLfloat))
(V4 0 (2*zoom/winy) 0 0)
(V4 0 0 1 0)
(V4 0 0 0 1)
rotMat = Linear.Matrix.transpose $
V4 (V4 (cos rot) (sin (-rot)) 0 0)
(V4 (sin rot) (cos rot) 0 0)
(V4 0 0 1 0)
(V4 0 0 0 1)
tranMat3 = Linear.Matrix.transpose $
V4 (V4 1 0 0 0)
(V4 0 1 0 0)
(V4 0 0 1 0)
(V4 (-tranx) (-trany) 0 1)
tranMat2 = Linear.Matrix.transpose $
V4 (V4 1 0 0 0)
(V4 0 1 0 0)
(V4 0 0 1 0)
(V4 (viewFromx-tranx) (viewFromy-trany) 0 1)
perMat = Linear.Matrix.transpose $
V4 (V4 1 0 0 0)
(V4 0 1 0 0)
(V4 0 0 1 1)
(V4 0 0 0 1)
tranMat1 = Linear.Matrix.transpose $
V4 (V4 1 0 0 0)
(V4 0 1 0 0)
(V4 0 0 1 0)
(V4 (-viewFromx) (-viewFromy) 0 1)
wmat = scalMat !*! rotMat !*! tranMat2 !*! perMat !*! tranMat1
vToL (V4 a b c d) = [a,b,c,d]
in concatMap vToL $ vToL wmat
src/Picture/Render.hs
+7 -7
View File
@@ -76,10 +76,12 @@ renderPicture' pdata rot zoom (tranx,trany) (winx,winy) wallPoints lightPoints
) :: IO (GLmatrix GLfloat)
uniform ( (fromJust $ _shaderCustomUnis $ _wallShadowShader pdata) !! 1)
$= pmat
cullFace $= Just Back
drawShader (_wallShadowShader pdata) nWalls
depthMask $= Disabled
blendFuncSeparate $= ((Zero,Zero),(Zero, OneMinusSrcAlpha))
blendFunc $= (Zero, OneMinusSrcAlpha)
-- blendFuncSeparate $= ((Zero,Zero),(Zero, OneMinusSrcAlpha))
stencilTest $= Enabled
forM_ lightPoints $ \(x,y,r,lum) -> do
-- depthFunc $= Just Less
@@ -91,13 +93,13 @@ renderPicture' pdata rot zoom (tranx,trany) (winx,winy) wallPoints lightPoints
-- currentProgram does get called twice: here and inside drawShader below
currentProgram $= Just (_shaderProgram $ _wallShadowShader pdata)
uniform (head $ fromJust $ _shaderCustomUnis $ _wallShadowShader pdata)
$= Vector2 (x) (y)
$= Vector2 x y
-- blendFunc $= (Zero,One)
drawShader (_wallShadowShader pdata) nWalls
cullFace $= Just Front
stencilOp $= (OpKeep,OpKeep,OpDecr)
drawShader (_wallShadowShader pdata) nWalls
-- cullFace $= Just Front
-- stencilOp $= (OpKeep,OpKeep,OpDecr)
-- drawShader (_wallShadowShader pdata) nWalls
cullFace $= Nothing
@@ -107,9 +109,7 @@ renderPicture' pdata rot zoom (tranx,trany) (winx,winy) wallPoints lightPoints
zTran (a,b) = (a*2*zoom / winx, b*2*zoom / winy)
pokeFourOff lightPtr 0 (x',y',r,lum)
bindShaderBuffers [_lightSourceShader pdata] [1]
stencilFunc $= (Equal, 0, 255)
-- depthFunc $= Just Always
drawShader (_lightSourceShader pdata) 1
-- currentProgram $= Just (_shaderProgram $ _wallLightShader pdata)