init

layers.ts

@@ -0,0 +1,72 @@
+import type { Layer, TraitOption } from ".";
+
+export const LAYERS: Layer[] = [
+    {
+        trait: 'skin',
+        path: './assets/skin/',
+        options: [
+            { fileName: 'sand.png' },
+            { fileName: 'sienna.png' },
+            { fileName: 'bole.png' },
+            { fileName: 'chocolate.png' }
+        ]
+    },
+    {
+        trait: 'nose',
+        path: './assets/nose/',
+        options: [
+            { fileName: 'small.png' },
+            { fileName: 'big.png' }
+        ]
+    },
+    {
+        trait: 'eyes',
+        path: './assets/eyes/',
+        options: [
+            { fileName: 'blue.png', weight: 27 },
+            { fileName: 'green.png', weight: 9 },
+            { fileName: 'brown.png', weight: 19 },
+            { fileName: 'dark_brown.png', weight: 45 }
+        ]
+    },
+    {
+        trait: 'mouth',
+        path: './assets/mouth/',
+        options: [
+            { fileName: 'neutral.png', weight: 8 },
+            { fileName: 'happy.png', weight: 4 },
+            { fileName: 'smirk.png', weight: 2 },
+            { fileName: 'shock.png', weight: 1 }
+        ]
+    },
+    {
+        trait: 'detail',
+        chance: 0.1,
+        path: './assets/detail/',
+        options: [
+            { fileName: 'halo.png', weight: 1 },
+            { fileName: 'red_beanie.png', weight: 25 },
+            { fileName: 'green_beanie.png', weight: 25 }
+        ]
+    }
+];
+
+export function weightedChoice(options: TraitOption[]): string {
+    let i;
+
+    let weights: number[] = [options[0].weight ?? 1];
+
+    for (i = 1; i < options.length; i++) {
+        weights[i] = (options[i].weight ?? 1) + weights[i - 1];
+    }
+
+    const random = Math.random() * weights[weights.length - 1];
+
+    for (i = 0; i < weights.length; i++) {
+        if (weights[i] > random) {
+            break;
+        }
+    }
+
+    return options[i].fileName;
+}