Get primary function compiling

src/Main.purs

@@ -1,16 +1,15 @@
 module Main where
 
-import Prelude (discard, class Monoid, class Semigroup, Unit, ($), (<>), (>>>), (*), (+), (-), (/))
+import Prelude (discard, class Monoid, class Semigroup, Unit, ($), (<<<), (<>), (*), (+), (-), (/))
 
-import Data.Array (range, cons)
-import Data.Field (div)
+import Data.Array (range, concat, mapWithIndex)
 import Data.Functor (map)
 import Data.Int (toNumber)
 import Data.Number (cos, pi, sin)
 import Data.Number.Format (toString)
 import Data.List (fold)
 import Data.Ord ((<))
-import Data.Ring (add, mul, negate, sub)
+import Data.Ring (negate)
 import Data.Tuple.Nested (Tuple3, tuple3, get1, get2, get3)
 import Effect (Effect)
 import Effect.Console (log)
@@ -69,6 +68,11 @@ svgLine { start: {x: x1, y: y1}, end: {x: x2, y: y2} } =
   XMLFragment $ """<path style="fill:none;stroke:#000000;stroke-width:0.5;stroke-linecap:butt;stroke-linejoin:miter;stroke-dasharray:none;stroke-opacity:1"
   """ <> (toString x1) <> "," <> (toString y1) <> " " <> (toString x2) <> "," <> (toString y2) <> "\"/>"
 
+svgText :: String -> Number -> Point -> Number -> XMLFragment
+svgText text fontSize { x: x, y: y } angle =
+  XMLFragment $ "<text xml:space=\"preserve\" style=\"font-size:" <> (toString fontSize) <> "\"px;line-height:131%;font-family:'Liberation sans';font-variant-position:super;fill:#000000;stroke:#000000;stroke-width:0.0999998;stroke-linecap:round;stop-color:#000000;fill-opacity:1\" "
+  <> "transform=\"translate(" <> (toString x) <> ", " <> (toString y) <> ") rotate(" <> (toString angle) <> ")\">" <> text <> "</text>"
+
 -- TODO: Make axis tick size a parameter
 getTick :: Number -> Int -> Int -> Line
 getTick scale numTicks tickI =
@@ -105,27 +109,56 @@ ternaryGraphSvg fragments = """<?xml version="1.0" encoding="UTF-8"?>
     xmlns:svg="http://www.w3.org/2000/svg">
 """ <> unfragment (fold fragments) <> "</svg>"
 
-axesPoints :: Number -> Array Point
-axesPoints angle = [
-  rotate angle { x: 0.0, y: 1.0 },
-  rotate angle { x: -(sin (2.0 * pi / 3.0)), y : -0.5},
-  rotate angle { x: (sin (2.8 * pi / 3.0)), y: -0.5 }
-]
+axesPoints :: Number -> Tuple3 Point Point Point
+axesPoints angle = tuple3 
+  (rotate angle { x: 0.0, y: 1.0 })
+  (rotate angle { x: -(sin (2.0 * pi / 3.0)), y : -0.5})
+  (rotate angle { x: (sin (2.8 * pi / 3.0)), y: -0.5 })
 
---ternaryGraph :: Number -> Number -> Number -> Int -> String
---ternaryGraph scale xOffset yOffset numTicks = ternaryGraphSvg [tickLinesSvg, axesPathSvg, axisTitleSvg, tickLabelsSvg]
---  where
---    axisTickLines = getTicks scale pi numTicks
---    axis1TickLines = get1 axisTickLines
---    axis2TickLines = get2 axisTickLines
---    axis3TickLines = get3 axisTickLines
---    tickLines = (cons axis1TickLines (cons axis2TickLines axis3TickLines))
---    transformMyLine = transformLine scale xOffset yOffset
---    tickLinesSvg = fold $ map (svgLine >>> transformMyLine) tickLines
---
---    axesPathSvg =
+axesPath :: Point -> Point -> Point -> XMLFragment
+axesPath p1 p2 p3 = XMLFragment $ """<path style="fill:none;stroke:#000000;stroke-width:1;stroke-linecap:bevel;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+""" <> "d=\"M " <> (toString p1.x) <> "," <> (toString p1.y) <> " " <> (toString p2.x) <> "," <> (toString p2.y) <> " " <> (toString p3.x) <> "," <> (toString p3.y) <> " Z\"/>"
+
+ternaryGraph :: Number -> Number -> Number -> Int -> String
+ternaryGraph scale xOffset yOffset numTicks = ternaryGraphSvg fragments
+  where
+    axisTickLines = getTicks scale pi numTicks
+    axis1TickLines = get1 axisTickLines
+    axis2TickLines = get2 axisTickLines
+    axis3TickLines = get3 axisTickLines
+    tickLines = concat [axis1TickLines, axis2TickLines, axis3TickLines] -- (cons axis1TickLines (cons axis2TickLines [axis3TickLines))
+    transformMyLine = transformLine scale xOffset yOffset
+    tickLinesSvg = fold $ map (svgLine <<< transformMyLine) tickLines
+
+    axesPointsPi = axesPoints pi
+    axesPathSvg = axesPath (get1 axesPointsPi) (get2 axesPointsPi) (get3 axesPointsPi)
+
+    -- TODO: axis text size
+    axisTitlesSvg = [
+      svgText "axis 1" 1.0 (transform scale xOffset yOffset {x: 0.0, y: 1.2}) 0.0,
+      svgText "axis 2" 1.0 (transform scale xOffset yOffset {x: -(sin (2.0 * pi / 3.0)), y: -0.7}) (-60.0),
+      svgText "axis 3" 1.0 (transform scale xOffset yOffset {x: (sin (2.8 * pi / 3.0)), y: -0.7}) 60.0
+    ]
+ 
+    axisTickStarts = map (\line -> transform scale xOffset yOffset line.start)
+    -- TODO: tick label size
+    -- TODO: axis tick label rotation
+    -- TODO: axis tick start number
+    axisTickLabels = \rotation -> mapWithIndex (\i point -> svgText ("E" <> (toString (toNumber i))) 1.0 point 0.0) 
+
+    axis1TickLabels = axisTickLabels 0 $ axisTickStarts axis1TickLines
+    axis2TickLabels = axisTickLabels 0 $ axisTickStarts axis2TickLines
+    axis3TickLabels = axisTickLabels 0 $ axisTickStarts axis3TickLines
+
+    tickLabelsSvg = concat [
+      axis1TickLabels,
+      axis2TickLabels,
+      axis3TickLabels
+    ]
+
+    fragments = concat [[tickLinesSvg, axesPathSvg], axisTitlesSvg, tickLabelsSvg]
 
 main :: Effect Unit
 main = do
-  log $ ternaryGraphSvg [XMLFragment "<asdf/>", XMLFragment "<foobar/>"]
+  log $ ternaryGraph 100.0 50.0 50.0 10
   log $ toString $ toNumber (5 / 3)