Is there a way to extend this PrimitiveMesh list by adding your own procedural geometry?

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1

Godot Version

4.6 Stable

Question

As the question suggests is there a way to add your own custom PrimitiveMesh geometry with your own custom settings, so like there is a cube and there is sphere and such can you make your own, preferably through GDScript if possible but I reckon this is probably something I would have to dive into C++ to achieve?

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2

Just inherit PrimitiveMesh in a named script class and it will appear on the list.

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3

Hmm that seems pretty straight forward, it definitely shows up in the list when I do it but how do I feed it info about my mesh data, I assume it is very similar to how I would construct an ArrayMesh through code, is there some function I need to override or something similar?

4

Yes there’s a virtual function you need to override. Look at the PrimitiveMesh class reference in the docs, it should be obvious.

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5

Oh yeah I got it now thanks!
Although another problem emerges for some reason, I keep getting this error (pic)
This is the code I used, in runtime it actually draws the triangle but still throws a bunch of errors, but if I add a @tooltool to the script to work in editor it just errors out and never draws the triangle

class_name testmesh
extends PrimitiveMesh

@export var testscale:float

func _create_mesh_array() -> Array:
	var arrays = []
	arrays.resize(Mesh.ARRAY_MAX)

	var vertices = PackedVector3Array()
	vertices.push_back(Vector3(0, 1, 0))
	vertices.push_back(Vector3(1, 0, 0))
	vertices.push_back(Vector3(0, 0, 1))
	var indices = PackedInt32Array([
		0, 1, 2,
	])	
	arrays[Mesh.ARRAY_VERTEX] = vertices
	arrays[Mesh.ARRAY_INDEX] = indices
	
	return arrays

Not really sure if this should be another thread :sweat_smile:

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6

Works fine for me in 4.6

7

After a while it just resolved itself, not sure why and what happened but yeah.

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