init repo

solana/NFT/beasts/generate.js

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+const { createCanvas, loadImage } = require('canvas');
+const fs = require('fs');
+
+const width = 1000;
+const height = 1000;
+const canvas = createCanvas(width, height);
+const ctx = canvas.getContext('2d');
+
+// Configuration des calques et de la rareté (poids)
+const layers = [
+    {
+        name: "Background",
+        elements: [
+            { name: "Island", file: "Island.png", weight: 20 },
+            { name: "Jungle", file: "Jungle.png", weight: 35 },
+            { name: "Mountain", file: "Mountain.png", weight: 15 },
+            { name: "Plain", file: "Plain.png", weight: 25 },
+            { name: "Jurrasic", file: "Jurrasic.png", weight: 5 }
+        ]
+    },
+    {
+        name: "beasts",
+        elements: [
+            { name: "Flicko", file: "Flicko.png", weight: 20 },
+            { name: "Darm", file: "Darm.png", weight: 15 },
+            { name: "Shiny Darm", file: "Shiny Darm.png", weight: 5 },
+            { name: "Marven", file: "Marven.png", weight: 20 },
+            { name: "Jii", file: "Jii.png", weight: 20 },
+            { name: "Tiro", file: "Tiro.png", weight: 15 },
+            { name: "Shiny Tiro", file: "Shiny Tiro.png", weight: 5 },
+        ]
+    },
+    {
+        name: "hat",
+        elements: [
+            { name: "No hat", file: "No hat.png", weight: 35 },
+            { name: "Cap", file: "Cap.png", weight: 25 },
+            { name: "Fish", file: "Fish.png", weight: 10 },
+            { name: "Magic", file: "Magic.png", weight: 30 },
+            { name: "Pirate", file: "Pirate.png", weight: 20 }
+        ]
+    }
+];
+
+// Fonction pour choisir un élément selon son poids (Rareté)
+function pickElement(layer) {
+    let totalWeight = layer.elements.reduce((acc, el) => acc + el.weight, 0);
+    let random = Math.random() * totalWeight;
+    for (let el of layer.elements) {
+        if (random < el.weight) return el;
+        random -= el.weight;
+    }
+}
+
+async function createNFT(editionId) {
+    let attributes = [];
+    ctx.clearRect(0, 0, width, height);
+
+    // 1. Sélectionner et dessiner chaque calque
+    for (const layer of layers) {
+        const element = pickElement(layer);
+        const image = await loadImage(`./layers/${layer.name}/${element.file}`);
+        ctx.drawImage(image, 0, 0, width, height);
+
+        attributes.push({ trait_type: layer.name, value: element.name });
+    }
+
+    // 2. Sauvegarder l'image finale
+    const buffer = canvas.toBuffer('image/png');
+    fs.writeFileSync(`./output/${editionId}.png`, buffer);
+
+    // 3. Créer le fichier JSON Metadata (Standard Solana/Metaplex)
+    const metadata = {
+        name: `Beast #${editionId}`,
+        symbol: "BSTS",
+        image: `${editionId}.png`, // Sera remplacé par l'URL IPFS plus tard
+        attributes: attributes,
+        properties: {
+            files: [{ uri: `${editionId}.png`, type: "image/png" }]
+        }
+    };
+    fs.writeFileSync(`./output/${editionId}.json`, JSON.stringify(metadata, null, 2));
+}
+
+// Générer 10 NFTs
+(async () => {
+    for (let i = 1; i <= 20; i++) {
+        await createNFT(i);
+        console.log(`NFT ${i} généré !`);
+    }
+})();