add document size in inches

build/ludus.mjs

@@ -309,7 +309,7 @@ export function svg (commands) {
   const path = svg_render_path(states)
   const turtle = svg_render_turtle(states[states.length - 1])
   return `<?xml version="1.0" standalone="no"?>
-<svg version="1.1" xmlns="http://www.w3.org/2000/svg" viewBox="${x_origin} ${y_origin} ${view_width} ${view_height}">
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" viewBox="${x_origin} ${y_origin} ${view_width} ${view_height}" width="10in", height="8in">
 
   <rect x="${x_origin - 5}" y="${y_origin - 5}" width="${view_width + 10}" height="${view_height + 10}" fill="#${hex(r)}${hex(g)}${hex(b)}" stroke-width="0" paint-order="fill" />
 

build/svg_test.mjs

@@ -1,18 +1,66 @@
 import {run, svg, stdout} from "./ludus.mjs"
 
 const code = `
-let start = unbox (turtle_state)
+background! (colors :white)
-fd! (100)
+pencolor! (colors :maroon)
-rt! (0.25)
-fd! (100) 
 
-loadstate! (start)
+fn ngon! (n, edge) -> {
-& home! ()
+  repeat n {
+    forward! (edge)
+    right! (inv (n))
+  }
+}
 
-rt! (0.25)
+fn cngon! (n, radius) -> {
-fd! (100)
+  let angle = add (inv (4), inv (mult (2, n)))
-lt! (0.25)
+  let edge = mult (2, radius, sin (inv (mult (2, n))))
 
+  penup! ()
+  forward! (radius)
+  right! (angle)
+  pendown! ()
+  ngon! (n, edge)
+  left! (angle)
+  penup! ()
+  back! (radius)
+  pendown! ()
+}
+
+fn twisty_nonagons! (times, iter, radius, growth) -> {
+  if gte? (iter, times) then :ok
+  else {
+    cngon! (9, radius)
+    right! (inv (times))
+    twisty_nonagons! (times, inc (iter), add (radius, growth), growth)
+  }
+}
+
+twisty_nonagons! (10, 0, 100, 3)
+
+fn centre_squares! (times, radius, growth) -> {
+  if lt? (times, 1) then :ok
+  else {
+    cngon! (4, radius)
+    centre_squares! (dec (times), add (radius, growth), growth)
+  } 
+}
+
+& right! (0.125)
+& centre_squares! (10, 100, 4)
+
+fn twisty_triangles! (times, radius, angle, growth) -> {
+  if lt? (times, 1) then :ok
+  else {
+    cngon! (3, radius)
+    right! (angle)
+    twisty_triangles! (dec (times), sub (radius, growth), angle, growth)
+  }
+}
+
+& right! (inv (6))
+& twisty_triangles! (8, 100, inv (120), 10)
+
+& hideturtle! ()
 `
 
 const result = run(code)

build/svg_test.svg

@@ -1,37 +0,0 @@
-<?xml version="1.0" standalone="no"?>
-<svg version="1.1" xmlns="http://www.w3.org/2000/svg" style="background-color:rgb(0 0 0); background-opacity: 1" viewBox="-12 -112 120 120">
-
-  <g transform="scale(-1, 1) rotate(180)">
-    
-    <line x1="0" y1="0" x2="6.123233995736766e-15" y2="100" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="6.123233995736766e-15" y1="100" x2="0" y2="0" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="0" y1="0" x2="100" y2="0" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    
-    <g transform="translate(100, 0)rotate(90)">
-      <polygon points="0 20 -13.226237306473037 -15.00222139260919 13.226237306473037 -15.00222139260919" stroke="none" fill="rgb(255 255 255)" fill-opacity="0.5882352941176471"/>
-      <line x1="0" y1="20" x2="0" y2="0" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1" />
-    </g>
-    
-  </g>
-
-<ludus>
-
-
-let home = unbox (turtle_state)
-
-fd! (100)
-
-loadstate! (home)
-
-rt! (0.25)
-fd! (100)
-
-do turtle_state &gt; unbox
-
-
-</ludus>
-</svg>
-