mesh data, trying to get vertex pos(global)

justinbarrett

I have not found anything aside from set_vertex() in the docs, but I am trying to find a getter for the vertex position. I've stored the indices in an array and want to access them to get their positions in world space e.g. node global pos + offset..or just plain global position of the vertices themselves..

Can anyone spit out a simple line of code that would help? ...I have no problem creating and appending them via loop(like one does), but for the life of me I cannot get their positions...

cybereality

Are you using MeshDataTool? https://docs.godotengine.org/en/3.1/classes/class_meshdatatool.html

get_vertex() will get the position, I believe in object space (you may have to transform to get world). https://docs.godotengine.org/en/3.1/classes/class_meshdatatool.html#class-meshdatatool-method-get-vertex

justinbarrett

Yes, I am using the MeshDataTool. I figured it was something like that, but I still don't know how to get it...if I get the object pos, I still need the orientation and distance of the vertex...or something like that... I am having trouble accessing anything from the vert...I will post my code in a while so people can see, but I really need my morning coffee first :)

justinbarrett

Excuse the commenting etc, I'm still learning GDscript, but I think this is pretty straight forward. The problem is there is no method for getting the vertex position, just setting it....setter, no getter. here is the script: extends MeshInstance

var idx = []
var pos

func _ready():
	
	var msh = mesh
	var mdt = MeshDataTool.new()
	mdt.create_from_surface(msh, 0)
	mdt.get_vertex_count()
	
	#print(String(self.name) +" has ("+String(mdt.get_vertex_count())+") verts") # debug
	
	for i in range(mdt.get_vertex_count()):
		
		idx.append(mdt.get_vertex(i))
		pos = idx[i].global_transform.origin # + orientation + vertex offset or something
		print(pos)
	
	
	### add object instances and settings like pos, rot, mat etc here
	
	
	
	### end of scorcery
	
	
	#print("Array length is: " + String(idx.size())) # debug
	mdt.clear() # clear data & free tool

cybereality

That's what "get_vertex()" does. It gets a Vector3 of the vertex position. This confused me at first too (maybe it should be called "get_vertex_position()"). Vector3 doesn't have a member "global_transform" so I don't think that will work. You can probably get the "global_transform" of the Spatial that script is attached to and use the xform (member of Transform) to convert the vertex position to world space.

https://docs.godotengine.org/en/3.1/classes/class_spatial.html#class-spatial-property-global-transform https://docs.godotengine.org/en/3.1/classes/class_transform.html#class-transform-method-xform

justinbarrett

ahh, ok, feeling a little stupid now :) lol...wont be the first time...I will try it out. EDIT: yeah that's it, some simple vector math and I get the pos converted to a world position. thank you.