Getting the path to a texture image file from material nodes

[MB]

All,

I have been unable to figure out how to get the paths to any texture image files used within a material.
I would like to get all image files a material might use, i.e. normal and bump maps as well as diffuse and specular. Could anyone enlighten me.

Many thanks

Mark

[roeland]

You can recursively walk over all the input nodes of the given node:

Code: Select all

local function walk(node, list)
    -- recursive walk
    for i = 1,node:getPinCount() do
        local src = node:getInputNodeIx(i)
        if src ~= nil then walk(src, list) end
    end

    -- see if this node has a filename attribute
    local ok, value = pcall(node.getAttribute, node, "filename")
    if ok then
        table.insert(list, value)
    end
end

local list = {}
walk(octane.project.getSelection()[1], list)
for k, v in ipairs(list) do
    print(v)
end

To check if any node has a file name attribute, you can use pcall, a standard Lua function which calls another function (octane.node.getAttribute in our case) with the given arguments and catches any errors raised.

This code gives you the file names of any kind of file referenced by the nodes, not just image textures.

--
Roeland

[MB]

Many Thanks Roeland