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Asked By
Curiously99
I put some lights and a camera in a 3D scene, then add a secondary 3D node and attach this script to that second node:
extends Node3D
var meshNew = MeshInstance3D.new()
var xAxis = 0.0
var yAxis = 0.0
var zAxis = 0.0
var xRotationDegress = 90
var whileXcount = 0
func _ready() -> void:
while whileXcount <= 5:
self.add_child(meshNew.duplicate())
meshNew.global_position = Vector3(xAxis,yAxis,zAxis)
# meshNew.global_rotation_degrees.x = xRotationDegress
meshNew.mesh = CylinderMesh.new()
meshNew.mesh.top_radius = 0.05
meshNew.mesh.bottom_radius = 0.05
meshNew.mesh.material = StandardMaterial3D.new()
xAxis += 1
whileXcount += 1
Once I’ve run it I see a row of 5 thin cylinders, all upright. When I remove the hash and run the code with the rotation line, I see the cylinders are all on their sides, as I want, but now they’ve stopped being spaced out in a row - they must all be one on top of the other, because it actually looks like only one cylinder.
You are using the meshNew variable during the loop without ever updating it to refer to the next mesh instance.
This should fix the loop:
while whileXcount <= 5:
var meshNew = MeshInstance3D.new()
self.add_child(meshNew)
Then remove the the initial meshNew creation outside the loop, otherwise you end up with 5 duplicate cylinders and the original one that’s never added to the scene.
If all the cylinders use the same mesh, you shouldn’t create a new CylinderMesh every time, you can pre-generate the cylinder before the loop and assign it to each MeshInstance. That way they share the same mesh and material and you save memory:
extends Node3D
var xAxis = 0.0
var yAxis = 0.0
var zAxis = 0.0
var xRotationDegress = 90
func _ready() -> void:
# Generate the shared mesh
var cylinderMesh = CylinderMesh.new()
cylinderMesh.top_radius = 0.05
cylinderMesh.bottom_radius = 0.05
cylinderMesh.material = StandardMaterial3D.new()
var whileXcount = 0
while whileXcount <= 5:
var meshNew = MeshInstance3D.new()
self.add_child(meshNew)
meshNew.global_position = Vector3(xAxis,yAxis,zAxis)
meshNew.global_rotation_degrees.x = xRotationDegress
# Use the same mesh for all nodes
meshNew.mesh = cylinderMesh
xAxis += 2
whileXcount += 1
