Scripting HelpersARCHIVE
A little piece of Roblox history. Preserved for everyone, one question at a time.Read about the archive →
All questions/Question #68763
✓ ANSWER ACCEPTED

How to move a model to absolute position but keep the rotations intact?

Asked 389 views2 answers

I can move CFrame of the primary part of my model, but after moving to absolute coordinates the rotation of the model is reset. Is there a neat way to preserve it, or do I really need to save the angles and reapply them after the move?

Note, I can do a relative move by (11,11,11) like this:

local model = workspace.model
local ppcf = model:GetPrimaryPartCFrame()
model:SetPrimaryPartCFrame( ppcf + Vector3.new(11,11,11) )

But when doing the absolute coordinates (22,22,22) the rotation is lost:

model:SetPrimaryPartCFrame( CFrame.new() + Vector3.new(22,22,22) )

One solution that comes to mind is to get all the components of the CFrame, change the (x, y, z) and send the components back to the primary part.

local x, y, z, m11, m12, m13, m21, m22, m23, m31, m32, m33 = ppcf:components()
x = 22
y = 22
z = 22
model:SetPrimaryPartCFrame( CFrame.new( x, y, z, m11, m12, m13, m21, m22, m23, m31, m32, m33 ) )

But that seems to be too cumbersome... Is there a better, more elegant or efficient way?

Anonymous

2 comments

1

Because you're doing CFrame.new() which creates a new cframe and then adding a v3? Add it to the current CFrame.

Anonymous#
0

If I add to the current, it will move to a relative location. I want to specify an absolute location. I suppose another approach is to subtract the primary part position vector from the relative shift vector to achieve absolute shift..

Anonymous#

2 answers

✓ Accepted answer

The solution you came up with is indeed viable, but inefficient. Good job, though.

I'd keep the rotations by using :ToEulerAnglesXYZ() inside of a CFrame.Angles. :ToEulerAnglesXYZ() basically returns the rotation values of a CFrame grouping.


local Model = Instance.new('Model', workspace)

for i = 0, 5 do
	wait()
	local x=Instance.new('Part', Model)
	x.CFrame = CFrame.new(math.random(1,15),math.random(1,30),math.random(1,45)) * CFrame.Angles(math.random(1,360),math.random(1,360),math.random(1,360))
	x.Anchored=true;
	x.CanCollide=false;
end

Model.PrimaryPart = Model:GetChildren()[math.random(1,#Model:GetChildren())]

wait(5)

Model:SetPrimaryPartCFrame(
	CFrame.new(15,30,45) * 
	CFrame.Angles(
		Model:GetPrimaryPartCFrame():toEulerAnglesXYZ() --Grab the Primary Part CFrame using :GetPrimaryPartCFrame(), then convert the CFrame using the toEulerAnglesXYZ() function.
	)
)
AnonymousEdited Permalink

Your second idea could work, but you're right- there's a simpler way to do it. The issue with the first bit of code isn't setting it to an absolute value, it's adding CFrame.new() to the value rather than doing anything with the original CFrame. You can do this much simpler by just adding the absolute value to the original value and subtract the original value's Vector3 (see below for an example).

local modelCFrame = model:GetPrimaryPartCFrame()
model:SetPrimaryPartCFrame(modelCFrame - modelCFrame.Position + Vector3.new(2,7,1))

Edit: I'm not sure about the efficiency, but it's definitely more readable and looks cleaner.

AnonymousEdited Permalink

3 comments

0

Ha, I've been late all dayyy. Better than a comment tho.

Anonymous#
0

just type a half finished answer with the code and edit in an explanation adding an "Edit:" to make it look like it was a minor edit

Anonymous#
0

lol ^. Also, it should be perfectly fine efficiency-wise.

Anonymous#

This discussion is preserved as it was. New answers, comments, and votes are closed.