1 files changed, 160 insertions, 0 deletions
diff --git a/block.gd b/block.gd
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+class_name Block
+extends Resource
+
+
+const FACE_CORNERS = [
+	Vector2(0, 0), Vector2(1, 0),
+	Vector2(0, 1), Vector2(1, 1),
+]
+
+enum Face {
+	FRONT,
+	BACK,
+	LEFT,
+	RIGHT,
+	TOP,
+	BOTTOM,
+}
+
+const FACES = [
+	[ # FRONT
+		[Vector3(-1.0, 1.0, 1.0), Vector3(1.0, -1.0, 1.0), Vector3(-1.0, -1.0, 1.0)],
+		[Vector3(-1.0, 1.0, 1.0), Vector3(1.0, 1.0, 1.0), Vector3(1.0, -1.0, 1.0)],
+	],
+	[ # BACK
+		[Vector3(1.0, 1.0, -1.0), Vector3(-1.0, -1.0, -1.0), Vector3(1.0, -1.0, -1.0)],
+		[Vector3(1.0, 1.0, -1.0), Vector3(-1.0, 1.0, -1.0), Vector3(-1.0, -1.0, -1.0)],
+	],
+	[ # LEFT
+		[Vector3(-1.0, 1.0, -1.0), Vector3(-1.0, -1.0, 1.0), Vector3(-1.0, -1.0, -1.0)],
+		[Vector3(-1.0, 1.0, -1.0), Vector3(-1.0, 1.0, 1.0), Vector3(-1.0, -1.0, 1.0)],
+	],
+	[ # RIGHT
+		[Vector3(1.0, 1.0, 1.0), Vector3(1.0, -1.0, -1.0), Vector3(1.0, -1.0, 1.0)],
+		[Vector3(1.0, 1.0, 1.0), Vector3(1.0, 1.0, -1.0), Vector3(1.0, -1.0, -1.0)],
+	],
+	[ # TOP
+		[Vector3(-1.0, 1.0, -1.0), Vector3(1.0, 1.0, 1.0), Vector3(-1.0, 1.0, 1.0)],
+		[Vector3(-1.0, 1.0, -1.0), Vector3(1.0, 1.0, -1.0), Vector3(1.0, 1.0, 1.0)],
+	],
+	[ # BOTTOM
+		[Vector3(-1.0, -1.0, 1.0), Vector3(1.0, -1.0, -1.0), Vector3(-1.0, -1.0, -1.0)],
+		[Vector3(-1.0, -1.0, 1.0), Vector3(1.0, -1.0, 1.0), Vector3(1.0, -1.0, -1.0)],
+	],
+]
+
+const FACE_UVS = [
+	[ # FRONT
+		[Vector2(0.0, 0.0), Vector2(1.0, 1.0), Vector2(0.0, 1.0)],
+		[Vector2(0.0, 0.0), Vector2(1.0, 0.0), Vector2(1.0, 1.0)],
+	],
+	[ # BACK
+		[Vector2(0.0, 0.0), Vector2(1.0, 1.0), Vector2(0.0, 1.0)],
+		[Vector2(0.0, 0.0), Vector2(1.0, 0.0), Vector2(1.0, 1.0)],
+	],
+	[ # LEFT
+		[Vector2(0.0, 0.0), Vector2(1.0, 1.0), Vector2(0.0, 1.0)],
+		[Vector2(0.0, 0.0), Vector2(1.0, 0.0), Vector2(1.0, 1.0)],
+	],
+	[ # RIGHT
+		[Vector2(0.0, 0.0), Vector2(1.0, 1.0), Vector2(0.0, 1.0)],
+		[Vector2(0.0, 0.0), Vector2(1.0, 0.0), Vector2(1.0, 1.0)],
+	],
+	[ # TOP
+		[Vector2(0.0, 1.0), Vector2(1.0, 2.0), Vector2(0.0, 2.0)],
+		[Vector2(0.0, 1.0), Vector2(1.0, 1.0), Vector2(1.0, 2.0)],
+	],
+	[ # BOTTOM
+		[Vector2(1.0, 0.0), Vector2(2.0, 1.0), Vector2(1.0, 1.0)],
+		[Vector2(1.0, 0.0), Vector2(2.0, 0.0), Vector2(2.0, 1.0)],
+	],
+]
+
+const FACE_NORMALS = [
+	Vector3(0, 0, 1), # FRONT
+	Vector3(0, 0, -1), # BACK
+	Vector3(-1, 0, 0), # LEFT
+	Vector3(1, 0, 0), # RIGHT
+	Vector3(0, 1, 0), # TOP
+	Vector3(0, -1, 0), # BOTTOM
+]
+
+enum Type {
+	AIR,
+	GRASS,
+	DIRT,
+	LEAVES,
+	STONE,
+}
+
+const BLOCK_TYPES = {
+	Type.GRASS: {
+		"uv2s": [
+			Vector2(0, 0), # FRONT
+			Vector2(0, 0), # BACK
+			Vector2(0, 0), # LEFT
+			Vector2(0, 0), # RIGHT
+			Vector2(0, 1), # TOP
+			Vector2(1, 0), # BOTTOM
+		],
+	},
+	Type.DIRT: {
+		"uv2s": [
+			Vector2(1, 0), # FRONT
+			Vector2(1, 0), # BACK
+			Vector2(1, 0), # LEFT
+			Vector2(1, 0), # RIGHT
+			Vector2(1, 0), # TOP
+			Vector2(1, 0), # BOTTOM
+		],
+	},
+	Type.LEAVES: {
+		"uv2s": [
+			Vector2(2, 2), # FRONT
+			Vector2(2, 2), # BACK
+			Vector2(2, 2), # LEFT
+			Vector2(2, 2), # RIGHT
+			Vector2(2, 2), # TOP
+			Vector2(2, 2), # BOTTOM
+		],
+	},
+	Type.STONE: {
+		"uv2s": [
+			Vector2(2, 0), # FRONT
+			Vector2(2, 0), # BACK
+			Vector2(2, 0), # LEFT
+			Vector2(2, 0), # RIGHT
+			Vector2(2, 0), # TOP
+			Vector2(2, 0), # BOTTOM
+		],
+	},
+}
+
+var position: Vector3
+var type: Type
+
+
+func add_face(surface_tool: SurfaceTool, face: Face):
+	var uv2s = []
+	uv2s.resize(3)
+	uv2s.fill(BLOCK_TYPES[type].uv2s[face])
+	
+	var normals = []
+	normals.resize(3)
+	normals.fill(FACE_NORMALS[face])
+	
+	for idx in FACES[face].size():
+		var triangle = FACES[face][idx]
+		var triangle_positions = triangle.map(func(item):
+			return item + position
+		)
+		
+		var uvs = FACE_UVS[face][idx]
+		
+		surface_tool.add_triangle_fan(
+			PackedVector3Array(triangle_positions),
+			PackedVector2Array(uvs),
+			PackedColorArray(),
+			PackedVector2Array(uv2s),
+			PackedVector3Array(normals)
+		)