1 files changed, 125 insertions, 0 deletions
diff --git a/game/addons/zylann.hterrain/hterrain_chunk.gd b/game/addons/zylann.hterrain/hterrain_chunk.gd
new file mode 100644
index 0000000..400a057
--- /dev/null
+++ b/game/addons/zylann.hterrain/hterrain_chunk.gd
@@ -0,0 +1,125 @@
+@tool
+
+var cell_origin_x := 0
+var cell_origin_y := 0
+
+var _visible : bool
+# This is true when the chunk is meant to be displayed.
+# A chunk can be active and hidden (due to the terrain being hidden).
+var _active : bool
+
+var _pending_update : bool
+
+var _mesh_instance : RID
+# Need to keep a reference so that the mesh RID doesn't get freed
+# TODO Use RID directly, no need to keep all those meshes in memory
+var _mesh : Mesh = null
+
+
+# TODO p_parent is HTerrain, can't add type hint due to cyclic reference
+func _init(p_parent: Node3D, p_cell_x: int, p_cell_y: int, p_material: Material):
+	assert(p_parent is Node3D)
+	assert(typeof(p_cell_x) == TYPE_INT)
+	assert(typeof(p_cell_y) == TYPE_INT)
+	assert(p_material is Material)
+	
+	cell_origin_x = p_cell_x
+	cell_origin_y = p_cell_y
+
+	var rs := RenderingServer
+
+	_mesh_instance = rs.instance_create()
+
+	if p_material != null:
+		rs.instance_geometry_set_material_override(_mesh_instance, p_material.get_rid())
+
+	var world := p_parent.get_world_3d()
+	if world != null:
+		rs.instance_set_scenario(_mesh_instance, world.get_scenario())
+
+	_visible = true
+	# TODO Is this needed?
+	rs.instance_set_visible(_mesh_instance, _visible)
+
+	_active = true
+	_pending_update = false
+
+
+func _notification(p_what: int):
+	if p_what == NOTIFICATION_PREDELETE:
+		if _mesh_instance != RID():
+			RenderingServer.free_rid(_mesh_instance)
+			_mesh_instance = RID()
+
+
+func is_active() -> bool:
+	return _active
+
+
+func set_active(a: bool):
+	_active = a
+
+
+func is_pending_update() -> bool:
+	return _pending_update
+
+
+func set_pending_update(p: bool):
+	_pending_update = p
+
+
+func enter_world(world: World3D):
+	assert(_mesh_instance != RID())
+	RenderingServer.instance_set_scenario(_mesh_instance, world.get_scenario())
+
+
+func exit_world():
+	assert(_mesh_instance != RID())
+	RenderingServer.instance_set_scenario(_mesh_instance, RID())
+
+
+func parent_transform_changed(parent_transform: Transform3D):
+	assert(_mesh_instance != RID())
+	var local_transform := Transform3D(Basis(), Vector3(cell_origin_x, 0, cell_origin_y))
+	var world_transform := parent_transform * local_transform
+	RenderingServer.instance_set_transform(_mesh_instance, world_transform)
+
+
+func set_mesh(mesh: Mesh):
+	assert(_mesh_instance != RID())
+	if mesh == _mesh:
+		return
+	RenderingServer.instance_set_base(_mesh_instance, mesh.get_rid() if mesh != null else RID())
+	_mesh = mesh
+
+
+func set_material(material: Material):
+	assert(_mesh_instance != RID())
+	RenderingServer.instance_geometry_set_material_override( \
+		_mesh_instance, material.get_rid() if material != null else RID())
+
+
+func set_visible(visible: bool):
+	assert(_mesh_instance != RID())
+	RenderingServer.instance_set_visible(_mesh_instance, visible)
+	_visible = visible
+
+
+func is_visible() -> bool:
+	return _visible
+
+
+func set_aabb(aabb: AABB):
+	assert(_mesh_instance != RID())
+	RenderingServer.instance_set_custom_aabb(_mesh_instance, aabb)
+
+
+func set_render_layer_mask(mask: int):
+	assert(_mesh_instance != RID())
+	RenderingServer.instance_set_layer_mask(_mesh_instance, mask)
+
+
+func set_cast_shadow_setting(setting: int):
+	assert(_mesh_instance != RID())
+	RenderingServer.instance_geometry_set_cast_shadows_setting(_mesh_instance, setting)
+