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authorjacopograndi <jacopo.grandi@outlook.it>2022-01-14 13:06:22 +0100
committerjacopograndi <jacopo.grandi@outlook.it>2022-01-14 13:06:22 +0100
commitad8002a8aadd7f537ef1c1d6c47d48f9e13d2015 (patch)
treee07c243def4499b0d220429364d9b9a3f23c1453 /addons/voxel-core/classes/voxel_object.gd
parent4bfbf641dc2b8aca8de9f86a9908063f39bd6e31 (diff)
deleted: LICENSE
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Diffstat (limited to 'addons/voxel-core/classes/voxel_object.gd')
-rw-r--r--addons/voxel-core/classes/voxel_object.gd501
1 files changed, 0 insertions, 501 deletions
diff --git a/addons/voxel-core/classes/voxel_object.gd b/addons/voxel-core/classes/voxel_object.gd
deleted file mode 100644
index 8d12633..0000000
--- a/addons/voxel-core/classes/voxel_object.gd
+++ /dev/null
@@ -1,501 +0,0 @@
-tool
-extends MeshInstance
-# Makeshift interface class inhereted by all voxel visualization objects.
-
-
-
-## Signals
-# Emitted when VoxelSet is changed
-signal set_voxel_set(voxel_set)
-
-
-
-## Enums
-# Defines the modes in which Mesh can be constructed
-enum MeshModes {
- # Naive meshing, simple culling of voxel faces; http://web.archive.org/web/20200428085802/https://0fps.net/2012/06/30/meshing-in-a-minecraft-game/
- NAIVE,
- # Greedy meshing, culls and merges similar voxel faces; http://web.archive.org/web/20201112011204/https://www.gedge.ca/dev/2014/08/17/greedy-voxel-meshing
- GREEDY,
- # Marching Cubes meshing, https://en.wikipedia.org/wiki/Marching_cubes
- #MARCHING_CUBES,
- # Transvoxel meshing, http://web.archive.org/web/20201112033736/http://transvoxel.org/
- #TRANSVOXEL,
-}
-
-
-
-## Exported Variables
-# The meshing mode by which Mesh is generated
-export(MeshModes) var mesh_mode := MeshModes.NAIVE setget set_mesh_mode
-
-# Flag indicating that UV Mapping should be applied when generating meshes if applicable
-export var uv_map := false setget set_uv_map
-
-# Flag indicating the persitant attachment and maintenance of a StaticBody
-export var static_body := false setget set_static_body
-
-# The VoxelSet for this VoxelObject
-export(Resource) var voxel_set = null setget set_voxel_set
-
-
-
-## Public Variables
-# Flag indicating that edits to voxel data will be frequent
-# NOTE: When true will only allow naive meshing
-var edit_hint := 0 setget set_edit_hint
-
-
-
-# Public Methods
-# Sets the EditHint flag, calls update_mesh if needed and not told otherwise
-func set_edit_hint(value : int, update := is_inside_tree()) -> void:
- edit_hint = value
-
- if update:
- update_mesh()
-
-
-# Sets the mesh_mode, calls update_mesh if needed and not told otherwise
-func set_mesh_mode(value : int, update := is_inside_tree()) -> void:
- mesh_mode = value
-
- if update:
- update_mesh()
-
-
-# Sets the uv_map, calls update_mesh if needed and not told otherwise
-func set_uv_map(value : bool, update := is_inside_tree()) -> void:
- uv_map = value
-
- if update:
- update_mesh()
-
-
-# Sets static_body, calls update_static_body if needed and not told otherwise
-func set_static_body(value : bool, update := is_inside_tree()) -> void:
- static_body = value
-
- if update:
- update_static_body()
-
-
-# Sets voxel_set, calls update_mesh if needed and not told otherwise
-func set_voxel_set(value : Resource, update := is_inside_tree()) -> void:
- if not (typeof(value) == TYPE_NIL or value is VoxelSet):
- printerr("Invalid Resource given expected VoxelSet")
- return
-
- if is_instance_valid(voxel_set):
- if voxel_set.is_connected("requested_refresh", self, "update_mesh"):
- voxel_set.disconnect("requested_refresh", self, "update_mesh")
-
- voxel_set = value
- if is_instance_valid(voxel_set):
- if not voxel_set.is_connected("requested_refresh", self, "update_mesh"):
- voxel_set.connect("requested_refresh", self, "update_mesh")
-
- if update:
- update_mesh()
- emit_signal("set_voxel_set", voxel_set)
-
-
-# Return true if no voxels are present
-func empty() -> bool:
- return true
-
-
-# Sets given voxel id at the given grid position
-func set_voxel(grid : Vector3, voxel_id : int) -> void:
- pass
-
-
-# Replace current voxel data with given voxel data
-# voxels : Dictionary<Vector3, int> : voxels to set
-func set_voxels(voxels : Dictionary) -> void:
- erase_voxels()
- for grid in voxels:
- set_voxel(grid, voxels[grid])
-
-
-# Returns voxel id at given grid position if present; otherwise returns -1
-func get_voxel_id(grid : Vector3) -> int:
- return -1
-
-
-# Returns voxel Dictionary representing voxel id at given grid position
-func get_voxel(grid : Vector3) -> Dictionary:
- return voxel_set.get_voxel(get_voxel_id(grid))
-
-
-# Returns Array of all voxel grid positions
-# return : Array<Vector3> : Array of Vector3 each represents a grid position of a voxel
-func get_voxels() -> Array:
- return []
-
-
-# Erase voxel id at given grid position
-func erase_voxel(grid : Vector3) -> void:
- pass
-
-
-# Erase all voxels
-func erase_voxels() -> void:
- for grid in get_voxels():
- erase_voxel(grid)
-
-
-# Returns 3D axis-aligned bounding box
-# volume : Array<Vector3> : Array of grid positions from which to calculate bounds
-# return : Dictionary : bounding box, contains: { position : Vector3, size: Vector3 }
-func get_box(volume := get_voxels()) -> Dictionary:
- var box := { "position": Vector3.ZERO, "size": Vector3.ZERO }
-
- if not volume.empty():
- box["position"] = Vector3.INF
- box["size"] = -Vector3.INF
-
- for voxel_grid in volume:
- if voxel_grid.x < box["position"].x:
- box["position"].x = voxel_grid.x
- if voxel_grid.y < box["position"].y:
- box["position"].y = voxel_grid.y
- if voxel_grid.z < box["position"].z:
- box["position"].z = voxel_grid.z
-
- if voxel_grid.x > box["size"].x:
- box["size"].x = voxel_grid.x
- if voxel_grid.y > box["size"].y:
- box["size"].y = voxel_grid.y
- if voxel_grid.z > box["size"].z:
- box["size"].z = voxel_grid.z
-
- box["size"] = (box["size"] - box["position"]).abs() + Vector3.ONE
-
- return box
-
-
-# Moves voxels in given volume by given translation
-# translation : Vector3 : translation to move voxels by
-# volume : Array<Vector3> : Array of grid positions representing voxels to move
-func move(translation := Vector3(), volume := get_voxels()) -> void:
- var translated := {}
- for voxel_grid in volume:
- translated[voxel_grid + translation] = get_voxel_id(voxel_grid)
- erase_voxel(voxel_grid)
- for voxel_grid in translated:
- set_voxel(voxel_grid, translated[voxel_grid])
-
-
-# Centers voxels in given volume with respect to axis origin with the given alignment
-# alignment : Vector3 : Alignment to center voxels by
-# volume : Array<Vector3> : Array of grid positions representing voxels to center
-func center(alignment := Vector3(0.5, 0.5, 0.5), volume := get_voxels()) -> void:
- move(vec_to_center(alignment, volume), volume)
-
-
-# Flips voxels in given volume over set axis
-func flip(x : bool, y : bool, z : bool, volume := get_voxels()) -> void:
- var flipped := {}
- for voxel_grid in volume:
- flipped[Vector3(
- (voxel_grid.x + (1 if z else 0)) * (-1 if z else 1),
- (voxel_grid.y + (1 if y else 0)) * (-1 if y else 1),
- (voxel_grid.z + (1 if x else 0)) * (-1 if x else 1))] = get_voxel_id(voxel_grid)
- erase_voxel(voxel_grid)
- for voxel_grid in flipped:
- set_voxel(voxel_grid, flipped[voxel_grid])
-
-
-# Returns the translation necessary to center given volume by
-# alignment : Vector3 : Alignment to center voxels by
-# volume : Array<Vector3> : Array of grid positions representing voxels to center
-# return : Vector3 : Translation necessary to center
-func vec_to_center(alignment := Vector3(0.5, 0.5, 0.5), volume := get_voxels()) -> Vector3:
- var box := get_box(volume)
- alignment = Vector3.ONE - Vector3(
- clamp(alignment.x, 0.0, 1.0),
- clamp(alignment.y, 0.0, 1.0),
- clamp(alignment.z, 0.0, 1.0))
- return -box["position"] - (box["size"] * alignment).floor()
-
-# A Fast Voxel Traversal Algorithm for Ray Tracing, by John Amanatides
-# Algorithm paper: https://web.archive.org/web/20201108160724/http://www.cse.chalmers.se/edu/year/2010/course/TDA361/grid.pdf
-# from : Vector3 : World position from which to start raycast
-# direction : Vector3 : Direction of raycast
-# max_distance : int : Maximum distance of ray cast
-# stop : FuncRef : Calls on function, that receives "hit" and returns bool, as raycast is projected, if it returns true raycast is returned
-# return : Dictionary<String, Vector3> : If voxel is "hit", returns Dictionary with grid position and face normal; else empty
-func intersect_ray(
- from : Vector3,
- direction : Vector3,
- max_distance := 64,
- stop : FuncRef = null) -> Dictionary:
- var hit := {
- "normal": Vector3(),
- }
- var grid := Voxel.world_to_grid(from)
- var step := Vector3(
- 1 if direction.x > 0 else -1,
- 1 if direction.y > 0 else -1,
- 1 if direction.z > 0 else -1)
- var t_delta := direction.inverse().abs()
- var dist := from.distance_to(Voxel.world_to_snapped(from))
- var t_max := t_delta * dist
- var step_index := -1
-
- var t = 0.0
- var valid := false
- while t < max_distance:
- hit["position"] = grid
- hit["normal"].x = -step.x if step_index == 0 else 0
- hit["normal"].y = -step.y if step_index == 1 else 0
- hit["normal"].z = -step.z if step_index == 2 else 0
- if get_voxel_id(grid) > -1 or (is_instance_valid(stop) and stop.call_func(hit)):
- valid = true
- break
-
- match t_max.min_axis():
- Vector3.AXIS_X:
- grid.x += step.x
- t = t_max.x
- t_max.x += t_delta.x
- step_index = 0
- Vector3.AXIS_Y:
- grid.y += step.y
- t = t_max.y
- t_max.y += t_delta.y
- step_index = 1
- Vector3.AXIS_Z:
- grid.z += step.z
- t = t_max.z
- t_max.z += t_delta.z
- step_index = 2
- if not valid:
- hit.clear()
- return hit
-
-
-# Returns Array of all voxel grid positions connected to given target
-# target : Vector3 : Grid position at which to start flood select
-# selected : Array : Array to add selected voxel grid positions to
-# return : Array<Vector3> : Array of all voxel grid positions connected to given target
-func select_flood(target : Vector3, selected := []) -> Array:
- selected.append(get_voxel_id(target))
-
- for direction in Voxel.Faces:
- var next = target + direction
- if get_voxel_id(next) == get_voxel_id(selected[0]):
- if not selected.has(next):
- select_flood(next, selected)
-
- return selected
-
-
-# Returns Array of all voxel grid positions connected to given target that aren't obstructed at the given face normal
-# target : Vector3 : Grid position at which to start flood select
-# face_normal : Vector3 : Normal of face to check for obstruction
-# selected : Array : Array to add selected voxel grid positions to
-# return : Array<Vector3> : Array of all voxel grid positions connected to given target
-func select_face(target : Vector3, face_normal : Vector3, selected := []) -> Array:
- selected.append(target)
-
- for direction in Voxel.Faces[face_normal]:
- var next = target + direction
- if get_voxel_id(next) > -1:
- if get_voxel_id(next + face_normal) == -1:
- if not selected.has(next):
- select_face(next, face_normal, selected)
-
- return selected
-
-
-# Returns Array of all voxel grid positions connected to given target that are similar and aren't obstructed at the given face normal
-# target : Vector3 : Grid position at which to start flood select
-# face_normal : Vector3 : Normal of face to check for obstruction
-# selected : Array : Array to add selected voxel grid positions to
-# return : Array<Vector3> : Array of all voxel grid positions connected to given target
-func select_face_similar(target : Vector3, face_normal : Vector3, selected := []) -> Array:
- selected.append(target)
-
- for direction in Voxel.Faces[face_normal]:
- var next = target + direction
- if get_voxel_id(next) == get_voxel_id(selected[0]):
- if get_voxel_id(next + face_normal) == -1:
- if not selected.has(next):
- select_face_similar(next, face_normal, selected)
-
- return selected
-
-
-# Loads and sets voxels and replaces VoxelSet with given file
-# NOTE: Reference Reader.gd for valid file imports
-# source_file : String : Path to file to be loaded
-# new_voxel_set : bool : If true new VoxelSet is created, else overwrite current one
-# return int : int : Error code
-func load_file(source_file : String, new_voxel_set := true) -> int:
- var read := Reader.read_file(source_file)
- var error : int = read.get("error", FAILED)
- if error == OK:
- if new_voxel_set or not is_instance_valid(voxel_set):
- set_voxel_set(VoxelSet.new(), false)
- voxel_set.set_voxels(read["palette"])
-
- set_voxels(read["voxels"])
- return error
-
-
-# Makes a naive mesh out of volume of voxels given
-# volume : Array<Vector3> : Array of grid positions representing volume of voxels from which to buid ArrayMesh
-# vt : VoxelTool : VoxelTool with which ArrayMesh will be built
-# return : ArrayMesh : Naive voxel mesh
-func naive_volume(volume : Array, vt := VoxelTool.new()) -> ArrayMesh:
- if not is_instance_valid(voxel_set):
- return null
-
- vt.begin(voxel_set, uv_map)
-
- for position in volume:
- for direction in Voxel.Faces:
- if get_voxel_id(position + direction) == -1:
- vt.add_face(get_voxel(position), direction, position)
-
- return vt.commit()
-
-
-# Greedy meshing
-# volume : Array<Vector3> : Array of grid positions representing volume of voxels from which to buid ArrayMesh
-# vt : VoxelTool : VoxelTool with which ArrayMesh will be built
-# return : ArrayMesh : Greedy voxel mesh
-func greed_volume(volume : Array, vt := VoxelTool.new()) -> ArrayMesh:
- if not is_instance_valid(voxel_set):
- return null
-
- vt.begin(voxel_set, uv_map)
-
- var faces = Voxel.Faces.duplicate()
- for face in faces:
- faces[face] = []
- for position in volume:
- if get_voxel_id(position + face) == -1:
- faces[face].append(position)
-
- for face in faces:
- while not faces[face].empty():
- var bottom_right : Vector3 = faces[face].pop_front()
- var bottom_left : Vector3 = bottom_right
- var top_right : Vector3 = bottom_right
- var top_left : Vector3 = bottom_right
- var voxel : Dictionary = get_voxel(bottom_right)
-
-
- if not uv_map or Voxel.get_face_uv(voxel, face) == -Vector2.ONE:
- var width := 1
-
- while true:
- var index = faces[face].find(top_right + Voxel.Faces[face][1])
- if index > -1:
- var _voxel = get_voxel(faces[face][index])
- if Voxel.get_face_color(_voxel, face) == Voxel.get_face_color(voxel, face) and (not uv_map or Voxel.get_face_uv(_voxel, face) == -Vector2.ONE):
- width += 1
- faces[face].remove(index)
- top_right += Voxel.Faces[face][1]
- bottom_right += Voxel.Faces[face][1]
- else:
- break
- else:
- break
-
- while true:
- var index = faces[face].find(top_left + Voxel.Faces[face][0])
- if index > -1:
- var _voxel = get_voxel(faces[face][index])
- if Voxel.get_face_color(_voxel, face) == Voxel.get_face_color(voxel, face) and (not uv_map or Voxel.get_face_uv(_voxel, face) == -Vector2.ONE):
- width += 1
- faces[face].remove(index)
- top_left += Voxel.Faces[face][0]
- bottom_left += Voxel.Faces[face][0]
- else:
- break
- else:
- break
-
- while true:
- var used := []
- var current := top_right
- var index = faces[face].find(current + Voxel.Faces[face][3])
- if index > -1:
- var _voxel = get_voxel(faces[face][index])
- if Voxel.get_face_color(_voxel, face) == Voxel.get_face_color(voxel, face) and (not uv_map or Voxel.get_face_uv(_voxel, face) == -Vector2.ONE):
- current += Voxel.Faces[face][3]
- used.append(current)
- while true:
- index = faces[face].find(current + Voxel.Faces[face][0])
- if index > -1:
- _voxel = get_voxel(faces[face][index])
- if Voxel.get_face_color(_voxel, face) == Voxel.get_face_color(voxel, face) and (not uv_map or Voxel.get_face_uv(_voxel, face) == -Vector2.ONE):
- current += Voxel.Faces[face][0]
- used.append(current)
- else:
- break
- else:
- break
- if used.size() == width:
- top_right += Voxel.Faces[face][3]
- top_left += Voxel.Faces[face][3]
- for use in used:
- faces[face].erase(use)
- else:
- break
- else:
- break
- else:
- break
-
- while true:
- var used := []
- var current := bottom_right
- var index = faces[face].find(current + Voxel.Faces[face][2])
- if index > -1:
- var _voxel = get_voxel(faces[face][index])
- if Voxel.get_face_color(_voxel, face) == Voxel.get_face_color(voxel, face) and (not uv_map or Voxel.get_face_uv(_voxel, face) == -Vector2.ONE):
- current += Voxel.Faces[face][2]
- used.append(current)
- while true:
- index = faces[face].find(current + Voxel.Faces[face][0])
- if index > -1:
- _voxel = get_voxel(faces[face][index])
- if Voxel.get_face_color(_voxel, face) == Voxel.get_face_color(voxel, face) and (not uv_map or Voxel.get_face_uv(_voxel, face) == -Vector2.ONE):
- current += Voxel.Faces[face][0]
- used.append(current)
- else:
- break
- else:
- break
- if used.size() == width:
- bottom_right += Voxel.Faces[face][2]
- bottom_left += Voxel.Faces[face][2]
- for use in used:
- faces[face].erase(use)
- else:
- break
- else:
- break
- else:
- break
-
- vt.add_face(voxel,face,
- bottom_right, bottom_left, top_right, top_left)
-
- return vt.commit()
-
-
-# Updates Mesh and calls on save and update_static_body if needed
-# save : bool : Save voxels on update
-func update_mesh() -> void:
- update_static_body()
-
-
-# Sets and updates StaticMesh if demanded
-func update_static_body() -> void:
- pass