feat: trees

scripts/gen-assets.ts

@@ -118,6 +118,30 @@ const grass: Shade = (x, y) => {
   return [56 + n * 0.7 + patch * 0.5, 116 + n + blade + patch, 50 + n * 0.5 + patch * 0.4, 255]
 }
 
+// Tree bark: brown with vertical grain and the odd dark crack.
+const bark: Shade = (x, y) => {
+  const grain = Math.sin(x * 0.6 + noise(0, y) * 2) * 10
+  const n = noise(x, y) * 14
+  const crack = noise(Math.floor(x / 6), y) < -0.45 ? -24 : 0
+  return [92 + n + grain + crack, 66 + n * 0.8 + grain * 0.6 + crack, 44 + n * 0.6 + crack, 255]
+}
+
+// Oak leaves: mid green, blotchy clumps with brighter highlights.
+const leaf: Shade = (x, y) => {
+  const n = noise(x, y) * 26
+  const clump = noise(Math.floor(x / 5), Math.floor(y / 5)) * 22
+  const hi = noise(x, y) > 0.6 ? 22 : 0
+  return [58 + n * 0.5 + clump * 0.4, 120 + n + clump + hi, 42 + n * 0.4 + clump * 0.3, 255]
+}
+
+// Spruce needles: darker, cooler blue-green, finer streaky grain.
+const needle: Shade = (x, y) => {
+  const n = noise(x, y) * 18
+  const streak = noise(x, y * 2) * 10
+  const clump = noise(Math.floor(x / 6), Math.floor(y / 6)) * 12
+  return [40 + n * 0.4 + clump * 0.3, 84 + n + streak + clump, 58 + n * 0.5 + clump * 0.4, 255]
+}
+
 const wall: Shade = (x, y) => {
   const row = Math.floor(y / 16)
   const bx = (x + (row % 2) * 16) % 32
@@ -172,6 +196,9 @@ const npc: Shade = (x, y) => {
 const assets: Array<[string, number, number, Shade]> = [
   ["floor", 64, 64, floor],
   ["grass", 64, 64, grass],
+  ["bark", 64, 64, bark],
+  ["leaf", 64, 64, leaf],
+  ["needle", 64, 64, needle],
   ["wall", 64, 64, wall],
   ["crate", 64, 64, crate],
   ["npc", 48, 64, npc],