ModelPart

What are ModelParts

A ModelPart represents a Cube, Mesh, or Group from Blockbench.

Via scripting, ModelParts can be modified dynamically to do achieve whatever visuals you need (limited to Minecraft's rendering engine)

Accessing ModelParts

models is the global that acts as the Root of your avatar, and is where all ModelParts are stored, either as a child of models, a child of a child, or further down the tree.

Specifically, models's children are Blockbench models. When an avatar is selected, not only are a bbmodel's Cubes, Meshes, and Groups converted into ModelParts, but the bbmodel file itself is converted into ModelParts.

To access a child ModelPart from a parent ModelPart, index the parent using the child's name as a string.

Example:

local bbmodel = models["model"] -- access the bbmodel "model.bbmodel"

This logic is the same for every single ModelPart. If you want to access a child, index the parent with the child's name.

Fun Fact: models itself is a ModelPart

The below example accesses the Head Group from the WikiExampleAvatar

local head = models["model"]["root"]["Head"]

If the above seems tedious, Lua provides a shorthand way of indexing with strings. It only works when the string contains no spaces or special characters.

local head = models.model.root.Head

-- Below is invalid, as the name contains spaces
local superMegaAwsomeThing = models.model.root.Super Mega Awsome Thing

-- Super Mega Awsome Thing would need to be index with the normal method
local superMegaAwsomeThing = models.model.root["Super Mega Awsome Thing"]

BBModels within folders

When a bbmodel is within a folder, Figura will actually turn the folder itself into a ModelPart. This can be confusing as ModelParts are the only thing that does this.

local folderHead = models.folder.model.root.Head

ModelPart ParentTypes

In Figura, a ParentType is applied to a ModelPart causing the ModelPart to behave in a predefined behaviour. This behaviour includes behaving like a vanilla part like the Head or LeftLeg, moving the rendering of special parts like held items, armor, and parrots, or binding the ModelPart to the World instead of the Player.

ParentTypes can either be applied in Blockbench itself, or via script.

ParentTypes via BlockBench

To define a ParentType in Blockbench, the name of a Group must begin with a ParentType

For example, the Head ParentType causes the ModelPart to move and rotate like the vanilla Head. If you name a Group the following, it will have this ParentType:

• Head
• HEAD
• Head2
• HeadPhones

If you name a group the following, it will not have the Head ParentType:

• head => 'head' is not a valid ParentType. Capitalization matters!
• BigHead => Does not begin with ParentType
• HeAd => 'HeAd' is not a valid ParentType. Capitalization matters!

Do note that some English words naturally start with a ParentType and can cause unintended behaviour!

For example, the word "Guitar". Seems innocent, right? Well, "Guitar" starts with "Gui", and "Gui" is an alias for the ParentType Hud, a ParentType that binds the ModelPart to the Heads Up Display where the hotbar and inventory reside. This causes the ModelPart to not be visible, as Hud parts have special rules. Be careful!

Note: ParentTypes are sometimes called Keywords by legacy Figura users

ParentTypes via Script

Calling the setParentType on any ModelPart will override it's ParentType.

Simply access the ModelPart, then call setParentType on it, passing in the ParentType as a string.

local head = models.model.root.Head
head:setParentType("RightArm")

To remove a ParentType from a ModelPart, call setParentType with the string "None"

local head = models.model.root.Head
head:setParentType("None")

ModelParts do not remember their original ParentType! If you need a ModelPart's original ParentType, store it in a variable for later:

local head = models.model.root.Head
local headParentType = head:getParentType()
head:setParentType("None")

ModelPart Methods

ModelPart Properties

Read-only properties of a ModelPart

ModelPart:getName

Returns the name of this ModelPart. ModelParts can have duplicate names.

Arguments	Return Type
getName()	string

local head = models.model.root.Head
print(head:getName()) --> "Head"

ModelPart:getType

Returns the original type of this ModelPart. Can be Cube, Mesh, or Group. BBModels and folders are considered Groups. Cubes with no texture data are also considered Groups, as with no texture data their face data is stripped.

Arguments	Return Type
getType()	"Cube" | "Mesh" | "Group"

local head = models.model.root.Head
print(head:getType()) --> "Group"

Child Manipulation

Methods relating to getting other ModelParts and manipulating the ModelPart tree

ModelPart:getParent

Returns the parent of this ModelPart, or nil if this is models or a loose ModelPart created via script.

Arguments	Return Type
getParent()	ModelPart | nil

local head = models.model.root.Head
print(head:getParent()) --> ModelPart(root)

ModelPart:getChildren

Returns an array of all children of this ModelPart

Arguments	Return Type
getChildren()	ModelPart[]

local root = models.model.root
print(root:getChildren()) --[[
ModelPart(Head), 
ModelPart(Body), 
ModelPart(RightArm), 
ModelPart(LeftArm), 
ModelPart(RightLeg), 
ModelPart(LeftLeg),
]]--

ModelPart:isChildOf

Recursivly checks if this child is a decedent of the provided ModelPart.

Arguments	Return Type
isChildOf(part ModelPart)	boolean

local model = models.model
local head = model.root.Head
print(head:isChildOf(model)) --> true

ModelPart:copy

Copies the data of this ModelPart, assigning it a new name, then returning it. The new name has nothing to do with ParentTypes. The children of the copy are references to the original ModelPart's children. Extra work needs to be done to recursively copy it's children. The addChild method can then be used to add the copy to the ModelPart tree.

Arguments	Return Type
copy(newName string)	ModelPart

local head = models.model.root.Head

local headCopy = head:copy("NewHead")
print(headCopy) --> ModelPart(NewHead)

-- The parentType is copied with the ModelPart
local head = models.model.root.Head

local headCopy = head:copy("NewHead")
print(headCopy:getParentType()) --> "Head"

headCopy:setParentType("None")
print(headCopy:getParentType()) --> "None"

@see setParentType, getParentType

-- Extra work is needed to deep copy a ModelPart's children as well
local function deepCopy(model)
    local copy = model:copy(model:getName())
    for _, child in pairs(copy:getChildren()) do
        copy:removeChild(child):addChild(deepCopy(child))
    end
    return copy
end

local head = models.model.root.Head
local headCube = head.Head

-- headCopyA contains references to head's children cause it is a shallow copy
local headCopyA = head:copy("NewHead")
print(headCopyA.Head == headCube) --> true

-- headCopyB contains true copies of head's children as it was passed through a function that recursively copies children
local headCopyB = deepCopy(head)
print(headCopyB.Head == headCube) --> false

@see getName, getChildren, addChild, removeChild

ModelPart:addChild

Adds the provided ModelPart as one of this ModelPart's children. Beware of adding a parent of this ModelPart as a child! This method returns this ModelPart for method chaining.

Arguments	Return Type
addChild(part ModelPart)	self ModelPart

local root = models.model.root
local headCopy = root.Head:copy("NewHead")
root:addChild(headCopy)
headCopy:setPos(10,0,0)

@see copy, setPos

ModelPart:removeChild

Removes a child from this ModelPart. Takes in the child ModelPart itself. This method returns this ModelPart for method chaining.

Arguments	Return Type
removeChild(partToRemove ModelPart)	self ModelPart

local root = models.model.root
local head = root.Head
root:removeChild(head) -- Bye bye Head!

-- Head is still valid and can be re-added later, so long as we keep a variable referencing it.
print(head) --> ModelPart(Head)

ModelPart:remove

Removes this ModelPart from the parent's child list. Returns self

Arguments	Return Type
remove()	self ModelPart

local head = models.model.root.Head
head:remove() -- Bye bye Head!

-- Head is still valid and can be re-added, so long as we keep a variable referencing it.
print(head) --> ModelPart(Head)
models.model.root.LeftLeg:addChild(head)

@see addChild

Manipulation

Methods relating to manipulating the ModelPart within physical space

ModelPart:setPos

Sets the offset of the the position of the ModelPart. Position translation applies on the local rotation axis.

nil values are interpreted as 0.

Arguments	Return Type
setPos(pos Vector3)	self ModelPart
setPos(x number, y number, z number)	self ModelPart

local head = models.model.root.Head

-- Move 10 units on the local y axis
head:setPos(0, 10, 0)

ModelPart:getPos

Returns the value that was used for setPos. Always 0,0,0 when script begins.

Arguments	Return Type
getPos()	Vector3

local head = models.model.root.Head

print(head:getPos()) --> vec(0,0,0)
head:setPos(0, 10, 0)
print(head:getPos()) --> vec(0,10,0)

@see setPos

ModelPart:setRot

Sets the rotation of the ModelPart. Rotates the ModelPart around the PivotPoint.

Angles are interpreted as degrees. nil values are interpreted as 0.

Arguments	Return Type
setRot(rot Vector3)	self ModelPart
setRot(pitch number, yaw number, roll number)	self ModelPart

local head = models.model.root.Head

-- Rotate 45 degrees on the x axis, causing the avatar to look down
head:setRot(0, 45, 0)

ModelPart:getRot

Returns the value that was used for setRot. Will be the Rotation values defined in BlockBench when script begins.

Arguments	Return Type
getRot()	Vector3

local head = models.model.root.Head

print(head:getRot()) --> vec(0,0,0) -- Most ModelParts will not have a rotation set in blockbench
head:setRot(45, 0, 0)
print(head:getPos()) --> vec(45,0,0)

@see setRot

ModelPart:setScale

Sets the scale of the ModelPart. Scales the ModelPart around the PivotPoint.

nil values are interpreted as 1. If a number is provided for x and both y and z are not defined, x will be used for all 3 axis.

Arguments	Return Type
setScale(scale Vector3)	self ModelPart
setScale(scaleAll number)	self ModelPart
setScale(x number, y number, z number)	self ModelPart

local head = models.model.root.Head
-- Double the size of the head
head:setScale(2)
-- Squishes and stretches the entire model
models.model:setScale(1.5, 0.75, 1.5)

ModelPart:getScale

Returns the value that was used for setScale. Always 1,1,1 when script begins.

Arguments	Return Type
getScale()	Vector3

local head = models.model.root.Head

print(head:getScale()) --> vec(1,1,1)
head:setScale(2)
print(head:getScale()) --> vec(2,2,2)

@see setScale

ModelPart:setPivot

Sets the pivot point of the ModelPart. This overrides the pivot point defined in blockbench. It is recommended to use setOffsetPivot instead.

nil values are interpreted as 0.

Arguments	Return Type
setPivot(pivot Vector3)	self ModelPart
setPivot(x number, y number, z number)	self ModelPart

local head = models.model.root.Head

-- For a normal size humanoid model, the Head's pivot point is usually at 0,24,0
-- If we assume that the Head cube is an 8x8x8 cube,
-- then the head will rotate around the center of the cube instead of the neck
head:setPivot(0, 28, 0)

ModelPart:getPivot

Returns the Pivot Point defined in BlockBench, or the value set by setPivot if it was already overwritten.

Arguments	Return Type
getPivot()	Vector3

local head = models.model.root.Head

-- The Head group's pivot point for a humanoid model is usually at 0,24,0
print(head:getPivot()) --> vec(0,24,0)
head:setPivot(0,0,0)
-- We have completely ruined the rendering of this ModelPart
print(head:getPivot()) --> vec(0,0,0)

@see setPivot

ModelPart:setOffsetRot

Sets a rotation value that will be added to the ModelPart's rotation.

Angles are interpreted as degrees. nil values are interpreted as 0.

Arguments	Return Type
setOffsetRot(rot Vector3)	self ModelPart
setOffsetRot(pitch number, yaw number, roll number)	self ModelPart

local head = models.model.root.Head

-- ModelParts inherit their rotation from blockbench. The Head usually has a rotation of 0,0,0 for consistency with the vanilla model
print(head:getRot()) --> vec(0,0,0)
-- Set the offset to 45 degrees on the x axis, causing the avatar to look down
head:setOffsetRot(0, 45, 0)
-- The original rotation is unchanged.
print(head:getRot()) --> vec(0,0,0)

-- setOffsetRot is not additive.
head:setOffsetRot(0, 25, 0)
print(head:getOffsetRot()) --> vec(0,25,0)

@see getRot getOffsetRot

ModelPart:getOffsetRot

Returns the value that was used for setOffsetRot. Will be 0,0,0 when the script begins

Arguments	Return Type
getOffsetRot()	Vector3

local head = models.model.root.Head

print(head:getOffsetRot()) --> vec(0,0,0)
head:setOffsetRot(45, 0, 0)
print(head:getOffsetRot()) --> vec(45,0,0)

@see setOffsetRot

ModelPart:setOffsetScale

Sets a scale value that will be multiplied with the ModelPart's scale.

nil values are interpreted as 1. If a number is provided for x and both y and z are not defined, x will be used for all 3 axis.

Arguments	Return Type
setOffsetScale(scale Vector3)	self ModelPart
setOffsetScale(scaleAll number)	self ModelPart
setOffsetScale(x number, y number, z number)	self ModelPart

local head = models.model.root.Head
-- Double the size of the head
head:setScale(2)
-- Half the size of the head
head:setOffsetScale(0.5)
-- Results in no changes
-- I have no idea what this is used for

ModelPart:getOffsetScale

Returns the value that was used for setOffsetScale. Always 1,1,1 when script begins.

Arguments	Return Type
getOffsetScale()	Vector3

local head = models.model.root.Head

print(head:getOffsetScale()) --> vec(1,1,1)
head:setOffsetScale(2)
print(head:getOffsetScale()) --> vec(2,2,2)

@see setOffsetScale

ModelPart:setOffsetPivot

Sets a value that will be added to the ModelPart's pivot point.

nil values are interpreted as 0.

Arguments	Return Type
setOffsetPivot(pivot Vector3)	self ModelPart
setOffsetPivot(x number, y number, z number)	self ModelPart

local head = models.model.root.Head

-- If we assume that the Head cube is an 8x8x8 cube and offset the pivot up by 4,
-- then the head will rotate around the center of the cube instead of the neck
head:setOffsetPivot(0, 4, 0)
-- Notice that we did not need to know the original pivot point to do this

ModelPart:getOffsetPivot

Returns the value that was used for setOffsetPivot. Always 0,0,0 when script begins.

Arguments	Return Type
getOffsetPivot()	Vector3

local head = models.model.root.Head

print(head:getOffsetPivot()) --> vec(0,0,0)
head:setOffsetPivot(0,4,0)
print(head:getOffsetPivot()) --> vec(0,4,0)

@see setOffsetPivot

ModelPart:setMatrix

Allows you to manually define the matrix used for positioning this ModelPart. Returns self for method chaining.

Using setPos, setRot, setScale, setPivot, setOffsetRot, setOffsetScale, or setOffsetPivot will undo setMatrix

Using getPos, getRot, getScale, getPivot, getOffsetRot, getOffsetScale, or getOffsetPivot will return invalid values while setMatrix is in effect.

getTruePos, getTrueRot, getTrueScale, and getTruePivot are probably also affected, but nobody tested them yet.

Arguments	Return Type
setMatrix(matrix Matrix4)	self ModelPart

-- no example provided

ModelPart:getTruePos

Returns the position after all calculations are done. This includes setPos and the data from all playing Animations.

This does not include ParentTypes or transformations applied from a parent part.

Arguments	Return Type
getTruePos()	self Vector3

-- no example provided

ModelPart:getTrueRot

Returns the rotation after all calculations are done. This includes setRot, setOffsetRot, and the data from all playing Animations.

This does not include ParentTypes or transformations applied from a parent part.

Arguments	Return Type
getTruePos()	self Vector3

-- no example provided

ModelPart:getTrueScale

Returns the scale after all calculations are done. This includes setScale, setOffsetScale, and the data from all playing Animations.

This does not include ParentTypes or transformations applied from a parent part.

Arguments	Return Type
getTrueScale()	self Vector3

-- no example provided

ModelPart:getTruePivot

Returns the pivot point after all calculations are done. This includes setPivot and setOffsetPivot

This does not include ParentTypes or transformations applied from a parent part.

Arguments	Return Type
getTruePivot()	self Vector3

-- no example provided