Flix - Procedural training and Movie making

[dlannan]

Also just for some more clarity. My geom extenstion (this one a little modified) does the following when assigning new buffers to a mesh.

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function geom:makeMesh( goname, indices, verts, uvs, normals )

	if(#indices <= 0) then 
		print("[Error] Invalid indices count.")
		return 
	end
	
	local res = go.get(goname, "vertices")
	local iverts = #indices

	local meshdata = {}
	-- positions are required (should assert or something)
	tinsert(meshdata, { name = hash("position"), type=buffer.VALUE_TYPE_FLOAT32, count = 3 } )
	if(normals) then tinsert(meshdata, { name = hash("normal"), type=buffer.VALUE_TYPE_FLOAT32, count = 3 } ) end
	if(uvs) then tinsert(meshdata, { name = hash("texcoord0"), type=buffer.VALUE_TYPE_FLOAT32, count = 2 } ) end
	
	local meshbuf = buffer.create(iverts, meshdata)

	geomextension.setbufferbytesfromtable( meshbuf, "position", indices, verts )
	if(normals) then geomextension.setbufferbytesfromtable( meshbuf, "normal", indices, normals ) end
	if(uvs) then geomextension.setbufferbytesfromtable( meshbuf, "texcoord0", indices, uvs ) end 
		
	-- set the buffer with the vertices on the mesh
	resource.set_buffer(res, meshbuf)
end

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So the problem isnt being able to generate mesh buffer data, but trying to replace the mesh component handle so that it has a new handle. This might be doable in C++ but I’m not certain of that.
If there are examples/methods that can do this, I would be very welcome to suggestions.

I think this specific comment shows the main problem:

Mesh Component

It is important to note that you update the resource in your example. If all meshes use that same resource, then it won’t work as you intended. Instead, you can create a new buffer resource dynamically, and assign it: local newBuff = buffer.create(...) -- as you do now local resource_name = "/my_cloned_buffer.bufferc" -- make this unique for each resource! local buffer_resource = reource.create_buffer(resource_name, { buffer = newBuff }) go.set(url, "vertices", buffer_resource) -- replace i…

local resource_name = "/my_cloned_buffer.bufferc" -- make this unique for each resource!
This means there needs to be a physical resource file for each res that needs to be attached/modified for each instance.

Note: The code includes some helper funcs that copy tables into buffer data for consumption by the buffer.