From 0489a092bcae859c2a54ed5c51397177c3d28f2b Mon Sep 17 00:00:00 2001
From: jgk <justin.g.kruger@gmail.com>
Date: Fri, 12 Mar 2021 15:25:07 +0100
Subject: [PATCH] First implementation of quadratic bezier curve shader

---
 shader/Old/basicTexture.frag   | 15 ++++++++++++
 shader/Old/basicTexture.geom   | 36 +++++++++++++++++++++++++++++
 shader/Old/basicTexture.vert   | 20 ++++++++++++++++
 shader/Old/circle.frag         | 18 +++++++++++++++
 shader/Old/circle.geom         | 33 ++++++++++++++++++++++++++
 shader/Old/circle.vert         | 19 +++++++++++++++
 shader/Old/fadeCircle.frag     | 16 +++++++++++++
 shader/Old/fadeCircle.geom     | 30 ++++++++++++++++++++++++
 shader/Old/fadeCircle.vert     | 15 ++++++++++++
 shader/Old/fullFadeCircle.frag | 12 ++++++++++
 shader/Old/fullFadeCircle.geom | 30 ++++++++++++++++++++++++
 shader/Old/fullFadeCircle.vert | 12 ++++++++++
 shader/bezierQuad.frag         | 19 +++++++++++++++
 shader/bezierQuad.geom         | 28 +++++++++++++++++++++++
 shader/bezierQuad.vert         | 16 +++++++++++++
 src/Dodge/Item/Weapon.hs       | 23 +++++++++++++++++++
 src/Dodge/Rendering.hs         |  8 +++++--
 src/Picture.hs                 |  4 ++++
 src/Picture/Data.hs            |  2 ++
 src/Picture/Preload.hs         | 11 ++++++++-
 src/Picture/Tree.hs            | 42 +++++++---------------------------
 21 files changed, 372 insertions(+), 37 deletions(-)
 create mode 100644 shader/Old/basicTexture.frag
 create mode 100644 shader/Old/basicTexture.geom
 create mode 100644 shader/Old/basicTexture.vert
 create mode 100644 shader/Old/circle.frag
 create mode 100644 shader/Old/circle.geom
 create mode 100644 shader/Old/circle.vert
 create mode 100644 shader/Old/fadeCircle.frag
 create mode 100644 shader/Old/fadeCircle.geom
 create mode 100644 shader/Old/fadeCircle.vert
 create mode 100644 shader/Old/fullFadeCircle.frag
 create mode 100644 shader/Old/fullFadeCircle.geom
 create mode 100644 shader/Old/fullFadeCircle.vert
 create mode 100644 shader/bezierQuad.frag
 create mode 100644 shader/bezierQuad.geom
 create mode 100644 shader/bezierQuad.vert

diff --git a/shader/Old/basicTexture.frag b/shader/Old/basicTexture.frag
new file mode 100644
index 000000000..a1cefb0e9
--- /dev/null
+++ b/shader/Old/basicTexture.frag
@@ -0,0 +1,15 @@
+#version 430 core
+out vec4 FragColor;
+  
+in vec4 gColor;
+in vec2 gTex;
+
+uniform sampler2D aTexture;
+
+void main()
+{
+    FragColor = texture(aTexture, gTex) * gColor;
+//    FragColor = texture(aTexture, vTexCoord);
+//    FragColor = gColor;
+//    FragColor = vec4 (1,1,1,1);
+}
diff --git a/shader/Old/basicTexture.geom b/shader/Old/basicTexture.geom
new file mode 100644
index 000000000..a3e1851e4
--- /dev/null
+++ b/shader/Old/basicTexture.geom
@@ -0,0 +1,36 @@
+#version 430 core
+layout (points) in;
+layout (triangle_strip, max_vertices = 4) out;
+in vec4 vColor [];
+in vec2 vTexCoord [];
+out vec4 gColor;
+out vec2 gTex;
+void main()
+{
+  vec3 cenPos = gl_in[0].gl_Position.xyz;
+  float size = vTexCoord[0].y;
+  //float size = 0.05;
+  gColor = vColor[0];
+  float texPos = vTexCoord[0].x;
+
+  gl_Position = vec4 (cenPos.x - size*0.5, cenPos.y - size, cenPos.z , 1);
+  //gl_Position = vec4 (0, 0 , 5 , 1);
+  gTex = vec2 (texPos*0.0078125, 1);
+  EmitVertex();
+  gl_Position = vec4 (cenPos.x - size*0.5, cenPos.y + size, cenPos.z , 1);
+  //gl_Position = vec4 (0, 0.5 , 5 , 1);
+  gTex = vec2 (texPos*0.0078125, 0);
+  EmitVertex();
+  gl_Position = vec4 (cenPos.x + size*0.5, cenPos.y - size, cenPos.z , 1);
+  //gl_Position = vec4 (0.5, 0.5 , -5 , 1);
+  gTex = vec2 ((texPos+1)*0.0078125, 1);
+  EmitVertex();
+  gl_Position = vec4 (cenPos.x + size*0.5, cenPos.y + size, cenPos.z , 1);
+  gTex = vec2 ((texPos+1)*0.0078125, 0);
+  //gl_Position = vec4 (0.5, 0 , -5 , 1);
+  EmitVertex();
+
+
+  EndPrimitive();
+
+}
diff --git a/shader/Old/basicTexture.vert b/shader/Old/basicTexture.vert
new file mode 100644
index 000000000..cc19a07cd
--- /dev/null
+++ b/shader/Old/basicTexture.vert
@@ -0,0 +1,20 @@
+#version 430 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec4 aColor;
+layout (location = 2) in vec2 aTexCoord;
+
+uniform vec2 winSize;
+uniform float zoom;
+uniform vec2 translation;
+uniform float rotation;
+
+out vec4 vColor;
+out vec2 vTexCoord;
+
+void main()
+{
+    gl_Position = vec4(aPos, 1.0);
+    vColor = aColor;
+    vTexCoord = aTexCoord;
+}
+
diff --git a/shader/Old/circle.frag b/shader/Old/circle.frag
new file mode 100644
index 000000000..1396eaf73
--- /dev/null
+++ b/shader/Old/circle.frag
@@ -0,0 +1,18 @@
+#version 430 core
+in vec4 gColor;
+in vec2 cenPosT;
+in float gRad;
+out vec4 fColor;
+out float gl_FragDepth;
+
+void main()
+{
+  vec2 pos = gl_FragCoord.xy;
+ // fColor = vec4( gColor.xyz , 0 );
+ // fColor = vec4( gColor.xyz , 1 - step(distance(pos,cenPos.xy),gRad) );
+ // fColor = vec4( gColor.xyz , distance(pos,cenPos.xy)/gRad );
+//  fColor = vec4( gColor.rgb, gColor.a * (1-step(gRad/2,distance(pos,cenPosT))) );
+  gl_FragDepth = max(gl_FragCoord.z , step(gRad/2,distance(pos,cenPosT)));
+  fColor = gColor;
+}
+//note it is the fragdepth that stops this from being square
diff --git a/shader/Old/circle.geom b/shader/Old/circle.geom
new file mode 100644
index 000000000..2096c3d45
--- /dev/null
+++ b/shader/Old/circle.geom
@@ -0,0 +1,33 @@
+#version 430 core
+layout (points) in;
+layout (triangle_strip, max_vertices = 4) out;
+in vec4 vColor [];
+in float vRad [];
+out vec4 gColor;
+out float gRad;
+out vec2 cenPosT;
+
+uniform vec2 winSize;
+uniform float zoom;
+
+void main()
+{
+  vec3 cenPos = gl_in[0].gl_Position.xyz;
+  //cenPos = vec3 (0.5,0,0);
+  gColor = vColor[0];
+  gRad = vRad[0] * zoom * 2;
+//  gRad = 0.2;
+
+  cenPosT = vec2 ( (cenPos.x + 1) * 0.5 * winSize.x , (cenPos.y + 1) * 0.5 * winSize.y);
+
+  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y + gRad/winSize.y, cenPos.z , 1);
+  EmitVertex();
+  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y + gRad/winSize.y, cenPos.z , 1);
+  EmitVertex();
+  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y - gRad/winSize.y, cenPos.z , 1);
+  EmitVertex();
+  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y - gRad/winSize.y, cenPos.z , 1);
+  EmitVertex();
+
+  EndPrimitive();
+}
diff --git a/shader/Old/circle.vert b/shader/Old/circle.vert
new file mode 100644
index 000000000..e7e584a65
--- /dev/null
+++ b/shader/Old/circle.vert
@@ -0,0 +1,19 @@
+#version 430 core
+layout (location = 0) in vec3 position;
+layout (location = 1) in vec4 color;
+layout (location = 2) in float rad;
+out vec4 vColor;
+out float vRad;
+
+uniform vec2 winSize;
+uniform float zoom;
+uniform vec2 translation;
+uniform float rotation;
+uniform mat4 worldMat;
+
+void main()
+{
+  gl_Position = worldMat * vec4(position,1);
+  vColor = color;
+  vRad = rad;
+}
diff --git a/shader/Old/fadeCircle.frag b/shader/Old/fadeCircle.frag
new file mode 100644
index 000000000..953111146
--- /dev/null
+++ b/shader/Old/fadeCircle.frag
@@ -0,0 +1,16 @@
+#version 430 core
+in vec2 cenPosT;
+in vec2 gParams;
+out vec4 fColor;
+
+void main()
+{
+  vec2 pos = gl_FragCoord.xy;
+  float dist = min(1 , 2*distance(pos,cenPosT) / (gParams.x));
+  //float c = pow(gParams.y*dist,2);
+  float c = gParams.y * pow(1-dist,2);
+  //float c = gParams.y;
+  fColor = vec4( c,c,c ,c  );
+//  fColor = vec4( 1,0,0 ,  1);
+//  fColor = vec4( 1,0,0 , pow(dist,2) );
+}
diff --git a/shader/Old/fadeCircle.geom b/shader/Old/fadeCircle.geom
new file mode 100644
index 000000000..1f1122440
--- /dev/null
+++ b/shader/Old/fadeCircle.geom
@@ -0,0 +1,30 @@
+#version 430 core
+layout (points) in;
+layout (triangle_strip, max_vertices = 4) out;
+in vec2 vParams [];
+out vec2 gParams;
+out vec2 cenPosT;
+
+uniform vec2 winSize;
+uniform float zoom;
+
+void main()
+{
+  vec3 cenPos = gl_in[0].gl_Position.xyz;
+  //cenPos = vec3 (0.5,0,0);
+  gParams = vec2( vParams[0].x * zoom * 2, vParams[0].y);
+  float gRad = gParams.x;
+
+  cenPosT = vec2 ( (cenPos.x + 1) * 0.5 * winSize.x , (cenPos.y + 1) * 0.5 * winSize.y);
+
+  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y + gRad/winSize.y, 0.9 , 1);
+  EmitVertex();
+  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y + gRad/winSize.y, 0.9 , 1);
+  EmitVertex();
+  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y - gRad/winSize.y, 0.9 , 1);
+  EmitVertex();
+  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y - gRad/winSize.y, 0.9 , 1);
+  EmitVertex();
+
+  EndPrimitive();
+}
diff --git a/shader/Old/fadeCircle.vert b/shader/Old/fadeCircle.vert
new file mode 100644
index 000000000..0498314fe
--- /dev/null
+++ b/shader/Old/fadeCircle.vert
@@ -0,0 +1,15 @@
+#version 430 core
+layout (location = 0) in vec4 position;
+out vec2 vParams;
+
+uniform vec2 winSize;
+uniform float zoom;
+uniform vec2 translation;
+uniform float rotation;
+uniform mat4 worldMat;
+
+void main()
+{
+  gl_Position = vec4(position.xy,0,1);
+  vParams = position.zw;
+}
diff --git a/shader/Old/fullFadeCircle.frag b/shader/Old/fullFadeCircle.frag
new file mode 100644
index 000000000..45ca0c969
--- /dev/null
+++ b/shader/Old/fullFadeCircle.frag
@@ -0,0 +1,12 @@
+#version 430 core
+in vec4 gColor;
+in vec2 cenPosTrans;
+in float gRad;
+out vec4 fColor;
+
+void main()
+{
+  vec2 pos = gl_FragCoord.xy;
+  float dist = max(0 , 1 - 2 * distance(pos,cenPosTrans) / (gRad));
+  fColor = vec4( gColor.xyz , pow(gColor.z*dist,2) );
+}
diff --git a/shader/Old/fullFadeCircle.geom b/shader/Old/fullFadeCircle.geom
new file mode 100644
index 000000000..4d696433c
--- /dev/null
+++ b/shader/Old/fullFadeCircle.geom
@@ -0,0 +1,30 @@
+#version 430 core
+layout (points) in;
+layout (triangle_strip, max_vertices = 4) out;
+in vec4 vColor [];
+in float vRad [];
+uniform vec2 winSize;
+out vec4 gColor;
+out float gRad;
+out vec2 cenPosTrans;
+void main()
+{
+  vec3 cenPos = gl_in[0].gl_Position.xyz;
+  vec2 cenPosa = cenPos.xy + vec2 (1,1);
+  cenPosTrans = vec2 (cenPosa * winSize * 0.5);
+  gColor = vColor[0];
+  gRad = vRad[0];
+
+  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y + gRad/winSize.y, cenPos.z , 1);
+  EmitVertex();
+  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y + gRad/winSize.y, cenPos.z , 1);
+  EmitVertex();
+  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y - gRad/winSize.y, cenPos.z , 1);
+  EmitVertex();
+  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y - gRad/winSize.y, cenPos.z , 1);
+  EmitVertex();
+
+
+  EndPrimitive();
+
+}
diff --git a/shader/Old/fullFadeCircle.vert b/shader/Old/fullFadeCircle.vert
new file mode 100644
index 000000000..2046f8894
--- /dev/null
+++ b/shader/Old/fullFadeCircle.vert
@@ -0,0 +1,12 @@
+#version 430 core
+layout (location = 0) in vec3 position;
+layout (location = 1) in vec4 color;
+layout (location = 2) in float rad;
+out vec4 vColor;
+out float vRad;
+void main()
+{
+  gl_Position = vec4(position,1);
+  vColor = color;
+  vRad = rad;
+}
diff --git a/shader/bezierQuad.frag b/shader/bezierQuad.frag
new file mode 100644
index 000000000..5e415103e
--- /dev/null
+++ b/shader/bezierQuad.frag
@@ -0,0 +1,19 @@
+#version 430 core
+in vec4 gColor;
+in vec3 gBoundingBox;
+
+out vec4 fColor;
+
+float x = gBoundingBox.x;
+float y = gBoundingBox.y;
+float z = gBoundingBox.z;
+
+void main()
+{
+  //float d = x - y - 1 + 2* sqrt(y);
+  float d = sqrt(x) + sqrt(y) - 1;
+//  if ( d < -0.1 || d > 0.1) { discard; }
+  fColor = gColor;
+  if ( d < -z*0.1 || d > z*0.1) { fColor = vec4 (0,1,0,1); }
+  if ( d < -0.1 || d > 0.1) { fColor = vec4 (0,0,1,1); }
+}
diff --git a/shader/bezierQuad.geom b/shader/bezierQuad.geom
new file mode 100644
index 000000000..cb4d56003
--- /dev/null
+++ b/shader/bezierQuad.geom
@@ -0,0 +1,28 @@
+#version 430 core
+layout (triangles) in;
+layout (triangle_strip, max_vertices = 3) out;
+in vec4 vColor[];
+out vec4 gColor;
+out vec3 gBoundingBox;
+
+void main()
+{
+  vec3 pa = gl_in[0].gl_Position.xyz;
+  vec3 pb = gl_in[1].gl_Position.xyz;
+  vec3 pc = gl_in[2].gl_Position.xyz;
+
+  gBoundingBox = vec3 (1,0,1);
+  gColor = vColor[0];
+  gl_Position = vec4 (pa, 1);
+  EmitVertex();
+  gBoundingBox = vec3 (0,0,-0.9);
+  gColor = vColor[1];
+  gl_Position = vec4 (pb, 1);
+  EmitVertex();
+  gBoundingBox = vec3 (0,1,1);
+  gColor = vColor[2];
+  gl_Position = vec4 (pc, 1);
+  EmitVertex();
+
+  EndPrimitive();
+}
diff --git a/shader/bezierQuad.vert b/shader/bezierQuad.vert
new file mode 100644
index 000000000..aac780c96
--- /dev/null
+++ b/shader/bezierQuad.vert
@@ -0,0 +1,16 @@
+#version 430 core
+layout (location = 0) in vec3 position;
+layout (location = 1) in vec4 color;
+out vec4 vColor;
+
+uniform vec2 winSize;
+uniform float zoom;
+uniform float rotation;
+uniform vec2 translation;
+uniform mat4 worldMat;
+
+void main()
+{
+  gl_Position = worldMat * vec4(position.xyz,1);
+  vColor = color;
+}
diff --git a/src/Dodge/Item/Weapon.hs b/src/Dodge/Item/Weapon.hs
index a86829a03..7c75d599a 100644
--- a/src/Dodge/Item/Weapon.hs
+++ b/src/Dodge/Item/Weapon.hs
@@ -335,6 +335,11 @@ launcher = defaultGun
     , _itHammer = NoHammer
     , _itEffect = NoItEffect
     }
+bezierGun = defaultGun
+    { _itName = "B-GUN"
+    , _wpFire = bezierTarget
+    }
+
 remoteLauncher = defaultGun 
     { _itName = "ROCKO-REM"
     , _itIdentity = RemoteLauncher
@@ -1402,6 +1407,24 @@ grenadePic x = pictures [ color (dark $ dark green) $ circleSolid 5
                             $ scale 0.05 0.05 $ color green $ text $ show $ 1 + quot x 20 
                         ]
 
+bezierTarget :: Int -> World -> World
+bezierTarget cid w = setTarget w
+    where
+        j = _crInvSel $ _creatures w IM.! cid
+        setTarget = set (creatures . ix cid . crInv . ix j . wpFire) $ bezierControl p
+        p = mouseWorldPos w
+
+bezierControl :: Point2 -> Int -> World -> World
+bezierControl targetp cid w = shootWithSound 0 (mkBezierBul startp controlp targetp) cid w
+    where 
+        controlp = mouseWorldPos w
+        cr = _creatures w IM.! cid
+        dir = _crDir cr
+        startp = _crPos cr +.+ rotateV dir (_crRad cr + 1,0)
+
+mkBezierBul :: Point2 -> Point2 -> Point2 -> Int -> World -> World
+mkBezierBul startp controlp targetp cid w = w
+
 fireRemoteLauncher :: Int -> World -> World
 fireRemoteLauncher cid w = setLocation $ resetFire $ resetName 
                                 $ soundOnce (fromIntegral launcherSound)
diff --git a/src/Dodge/Rendering.hs b/src/Dodge/Rendering.hs
index 8e67c3085..353d9110a 100644
--- a/src/Dodge/Rendering.hs
+++ b/src/Dodge/Rendering.hs
@@ -75,6 +75,7 @@ worldPictures w
 --                        , itLabels
                         , ppLabels
                         , btLabels
+                        , testPic w
                         ]
     where
           decPicts      = IM.elems $ _decorations w
@@ -119,6 +120,11 @@ worldPictures w
                                     ]
                 where tst x y sc t = translate x y $ scale sc sc $ color white $ text t
 
+testPic :: World -> [Picture]
+testPic w = [setLayer 1 $ onLayerL [99] $ color red $ bezierQuad (-90,0) (90,-50) (-200,200) ]
+-- $ uncurry translate (mouseWorldPos w) 
+
+
 hudDrawings :: World -> Picture
 hudDrawings w = setLayer 1 $ (onLayer InvLayer) 
                         $ pictures
@@ -463,8 +469,6 @@ displayHP n w = translate (halfWidth w-80) (halfHeight w-20) $
                     scale 0.2 0.2 $ text $ reverse $ take 5 $ (++ repeat ' ') $ reverse $ show
                     $ _crHP $ _creatures w IM.! n
 
-testPic w = blank
-
 wallsForGloom :: World -> [(Point2,Point2,Point2,Point2)]
 wallsForGloom w = map (linePairs . _wlLine) $ filter (not . _wlIsSeeThrough)
                         $ filter wallCastsShadow
diff --git a/src/Picture.hs b/src/Picture.hs
index a754cb544..d4790ccf5 100644
--- a/src/Picture.hs
+++ b/src/Picture.hs
@@ -4,6 +4,7 @@ module Picture
     ( module Picture.Data
     , polygon
     , polygonCol
+    , bezierQuad
     , arc
     , arcSolid
     , thickArc
@@ -68,6 +69,9 @@ polygonCol :: [(Point2,RGBA)] -> Picture
 {-# INLINE polygonCol #-}
 polygonCol = PolygonCol 0
 
+bezierQuad :: Point2 -> Point2 -> Point2 -> Picture
+bezierQuad a b c = BezierQuad 0 [a,b,c]
+
 color :: RGBA -> Picture -> Picture
 {-# INLINE color #-}
 color c pic = OverPic id id 0 (const c) pic
diff --git a/src/Picture/Data.hs b/src/Picture/Data.hs
index 7fd4ea1f5..5cf63a2ed 100644
--- a/src/Picture/Data.hs
+++ b/src/Picture/Data.hs
@@ -22,6 +22,7 @@ import Data.Traversable
 
 data RenderType
     = RenderPoly [(Point3,Point4)]
+    | RenderBezQ [(Point3,Point4)]
     | RenderText [(Point3,Point4,Point3)]
     | RenderArc  (Point3,Point4,Point4)
     | RenderLine [(Point3,Point4)]
@@ -74,6 +75,7 @@ data Picture
     = Blank
     | Text Int String
     | Polygon Int [Point2]
+    | BezierQuad Int [Point2]
     | PolygonCol Int [(Point2,RGBA)]
     | Circle Int RGBA RGBA Float
     | ThickArc Int Float Float Float Float
diff --git a/src/Picture/Preload.hs b/src/Picture/Preload.hs
index a6df89073..b9fa41774 100644
--- a/src/Picture/Preload.hs
+++ b/src/Picture/Preload.hs
@@ -49,6 +49,9 @@ preloadRender = do
                                 [(0,3),(1,4),(2,3)] Points pokeCharStrat
                                 "data/texture/charMap.png"
 
+    bezierQuadShader
+           <- makeShader "bezierQuad" [vert,geom,frag] [(0,3),(1,4)]    Triangles pokeBezQStrat
+
 --the following vbo is set up to contain one fixed vertex
     dummyvbo <- genObjectName
     dummyptr <- mallocArray numDrawableElements
@@ -61,7 +64,7 @@ preloadRender = do
     backgroundvao <- setupVAO [(0,4),(1,2)]
     
     return $ RenderData
-        { _listShaders = [bslist,lslist,cslist,aslist,eslist]
+        { _listShaders = [bslist,lslist,cslist,aslist,eslist,bezierQuadShader]
         , _dummyVBO = dummyvbo
         , _dummyPtr = dummyptr
         , _lightSourceShader = lsShad
@@ -79,7 +82,13 @@ cleanUpRenderPreload pd = do
     freeShaderPointers $ _backgroundShader pd
     free $ _dummyPtr pd
 
+{-# INLINE pokeBezQStrat #-}
+pokeBezQStrat :: RenderType -> [[[Float]]]
+pokeBezQStrat (RenderBezQ vs) = fmap (\((x,y,z),(r,g,b,a)) -> [[x,y,z],[r,g,b,a]]) vs
+pokeBezQStrat _ = []
+
 {-# INLINE pokeTriStrat #-}
+pokeTriStrat :: RenderType -> [[[Float]]]
 pokeTriStrat (RenderPoly vs) = fmap (\((x,y,z),(r,g,b,a)) -> [[x,y,z],[r,g,b,a]]) vs
 pokeTriStrat _ = []
 
diff --git a/src/Picture/Tree.hs b/src/Picture/Tree.hs
index b259cfc88..679475507 100644
--- a/src/Picture/Tree.hs
+++ b/src/Picture/Tree.hs
@@ -8,13 +8,17 @@ import Geometry
 import Data.Bifunctor
 import Data.List
 
+-- todo: refactor out the layer check somehow
+-- consider generalising to alternative rather than using LTree
 picToLTree :: Maybe Int -> Picture -> LTree RenderType
 {-# INLINE picToLTree #-}
 picToLTree mx (Polygon i ps)
     = filtB mx i $ LLeaf $ RenderPoly $ zip (map zeroZ $ polyToTris ps) $ repeat black
-picToLTree mx (PolygonCol i vs) = 
-    filtB mx i $ LLeaf $ RenderPoly $ zip (map zeroZ $ polyToTris ps) $ polyToTris cs
+picToLTree mx (PolygonCol i vs)
+    = filtB mx i $ LLeaf $ RenderPoly $ zip (map zeroZ $ polyToTris ps) $ polyToTris cs
         where (ps,cs) = unzip vs
+picToLTree mx (BezierQuad i ps) 
+    = filtB mx i $ LLeaf $ RenderBezQ $ zip (map zeroZ $ ps) $ repeat black
 picToLTree mx (Circle i colC colE r)
     = filtB mx i $ LLeaf $ RenderEllipse [( (-r, r,0), colC)
                                          ,( (-r,-r,0), colE)
@@ -64,6 +68,7 @@ scaleT (x,y) (a,b,(o,s,t)) = (a,b,(o,s*x,t*y))
 overPos :: (Point3 -> Point3) -> RenderType -> RenderType
 {-# INLINE overPos #-}
 overPos f (RenderPoly vs) = RenderPoly $ map (first $ f) vs
+overPos f (RenderBezQ vs) = RenderBezQ $ map (first $ f) vs
 overPos f (RenderLine vs) = RenderLine $ map (first $ f) vs
 overPos f (RenderText vs) = RenderText $ map (\(a,b,c) -> (f a,b,c)) vs
 overPos f (RenderEllipse vs) = RenderEllipse $ map (first f) vs
@@ -77,6 +82,7 @@ overRot _ ren = ren
 overCol :: (Point4 -> Point4) -> RenderType -> RenderType
 {-# INLINE overCol #-}
 overCol f (RenderPoly vs)      = RenderPoly $ map (second $ f) vs
+overCol f (RenderBezQ vs)      = RenderBezQ $ map (second $ f) vs
 overCol f (RenderLine vs)      = RenderLine $ map (second $ f) vs
 overCol f (RenderEllipse vs)   = RenderEllipse $ map (second $ f) vs
 overCol f (RenderText vs)      = RenderText $ map (\(a,b,c) -> (a,f b,c)) vs
@@ -112,35 +118,3 @@ rotate3 :: Float -> Point3 -> Point3
 rotate3 a (x,y,z) = (x',y',z)
     where (x',y') = rotateV a (x,y)
 
---picToAlt :: (Ap.Alternative f, Monoid (f RenderType)) => Int -> Picture -> f RenderType
---{-# INLINE picToAlt #-}
---picToAlt x (Polygon i ps) 
---    | i == x = Ap.pure $ RenderPoly $ zip (map zeroZ $ polyToTris ps) $ repeat black
---    | otherwise = Ap.empty
---picToAlt x (PolygonCol i vs) 
---    | i /= x = Ap.empty 
---    | otherwise = 
---        let (ps,cs) = unzip vs
---        in  Ap.pure $ RenderPoly $ zip (map zeroZ $ polyToTris ps) $ polyToTris cs
---picToAlt x (Circle i r) 
---    | i == x = Ap.pure $ RenderCirc $ ((0,0,0),black,r)
---    | otherwise = Ap.empty
---picToAlt x (Ellipse i (ax,ay) (bx,by) r) 
---    | i == x = Ap.pure $ RenderEllipse [((ax,ay+r,0),black)
---                                       ,((ax,ay-r,0),black)
---                                       ,((bx,by-r,0),black)
---                                       ]
---    | otherwise = Ap.empty
---picToAlt x (ThickArc i startA endA rad wdth) 
---    | i == x = Ap.pure $ RenderArc $ ((0,0,0),black,(startA,endA,rad,wdth))
---    | otherwise = Ap.empty
---picToAlt x (Line i ps) 
---    | i == x = Ap.pure $ RenderLine $ zip (map zeroZ $ doubleLine ps) $ repeat white
---    | otherwise = Ap.empty
---picToAlt x (Text i s) 
---    | i == x = Ap.pure $ RenderText $ stringToList s
---    | otherwise = Ap.empty
---picToAlt j Blank = Ap.empty
---picToAlt j (Pictures pics) = mconcat $ fmap (picToAlt j) pics
-
-