feat(world): voxel chunks + procedural underwater generation + biomes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/world/BlockDatabase.gd

@@ -0,0 +1,102 @@
+extends Node
+
+enum BlockType {
+	AIR = 0,
+	WATER = 1,
+	SAND = 2,
+	ROCK = 3,
+	CORAL_RED = 4,
+	CORAL_BLUE = 5,
+	KELP = 6,
+	WRECK_WOOD = 7,
+	ICE = 8,
+	BEDROCK = 9
+}
+
+const _BLOCKS: Dictionary = {
+	BlockType.AIR: {
+		"name": "Air",
+		"color": Color(0.0, 0.0, 0.0, 0.0),
+		"hardness": 0.0,
+		"drops": []
+	},
+	BlockType.WATER: {
+		"name": "Eau",
+		"color": Color(0.1, 0.4, 0.8, 0.6),
+		"hardness": 0.0,
+		"drops": []
+	},
+	BlockType.SAND: {
+		"name": "Sable",
+		"color": Color(0.76, 0.70, 0.50, 1.0),
+		"hardness": 0.5,
+		"drops": [BlockType.SAND]
+	},
+	BlockType.ROCK: {
+		"name": "Roche",
+		"color": Color(0.45, 0.45, 0.45, 1.0),
+		"hardness": 2.0,
+		"drops": [BlockType.ROCK]
+	},
+	BlockType.CORAL_RED: {
+		"name": "Corail Rouge",
+		"color": Color(0.90, 0.25, 0.20, 1.0),
+		"hardness": 0.3,
+		"drops": [BlockType.CORAL_RED]
+	},
+	BlockType.CORAL_BLUE: {
+		"name": "Corail Bleu",
+		"color": Color(0.20, 0.50, 0.95, 1.0),
+		"hardness": 0.3,
+		"drops": [BlockType.CORAL_BLUE]
+	},
+	BlockType.KELP: {
+		"name": "Algue",
+		"color": Color(0.15, 0.60, 0.20, 1.0),
+		"hardness": 0.1,
+		"drops": [BlockType.KELP]
+	},
+	BlockType.WRECK_WOOD: {
+		"name": "Bois d'Épave",
+		"color": Color(0.35, 0.22, 0.12, 1.0),
+		"hardness": 1.0,
+		"drops": [BlockType.WRECK_WOOD]
+	},
+	BlockType.ICE: {
+		"name": "Glace",
+		"color": Color(0.75, 0.90, 1.0, 0.85),
+		"hardness": 0.8,
+		"drops": []
+	},
+	BlockType.BEDROCK: {
+		"name": "Bedrock",
+		"color": Color(0.15, 0.15, 0.15, 1.0),
+		"hardness": -1.0,
+		"drops": []
+	}
+}
+
+func is_solid(id: int) -> bool:
+	if id == BlockType.AIR or id == BlockType.WATER or id == BlockType.KELP:
+		return false
+	return true
+
+func get_color(id: int) -> Color:
+	if _BLOCKS.has(id):
+		return _BLOCKS[id]["color"]
+	return Color(1.0, 0.0, 1.0, 1.0)
+
+func get_block_name(id: int) -> String:
+	if _BLOCKS.has(id):
+		return _BLOCKS[id]["name"]
+	return "Unknown"
+
+func get_hardness(id: int) -> float:
+	if _BLOCKS.has(id):
+		return _BLOCKS[id]["hardness"]
+	return 1.0
+
+func get_drops(id: int) -> Array:
+	if _BLOCKS.has(id):
+		return _BLOCKS[id]["drops"]
+	return []