Improve bezier curve rendering

src/Picture/Preload.hs

@@ -50,7 +50,7 @@ preloadRender = do
                                 "data/texture/charMap.png"
 
     bezierQuadShader
-           <- makeShader "bezierQuad" [vert,geom,frag] [(0,3),(1,4),(2,1)]    Triangles pokeBezQStrat
+           <- makeShader "bezierQuad" [vert,geom,frag] [(0,3),(1,4),(2,3)]    Triangles pokeBezQStrat
 
 --the following vbo is set up to contain one fixed vertex
     dummyvbo <- genObjectName
@@ -84,7 +84,7 @@ cleanUpRenderPreload pd = do
 
 {-# INLINE pokeBezQStrat #-}
 pokeBezQStrat :: RenderType -> [[[Float]]]
-pokeBezQStrat (RenderBezQ vs) = fmap (\((x,y,z),(r,g,b,a),s) -> [[x,y,z],[r,g,b,a],[s]]) vs
+pokeBezQStrat (RenderBezQ vs) = fmap (\((x,y,z),(r,g,b,a),(s,t,v)) -> [[x,y,z],[r,g,b,a],[s,t,v]]) vs
 pokeBezQStrat _ = []
 
 {-# INLINE pokeTriStrat #-}