-- Create a  mix material diffuse/glossy for organic materials liche leaves and grass.
--
-- @description Create a mix-organic material from an RGBA Image
-- @author      Beppe Gullotta
-- @version     0.6


-- This script create a node-group with a mix, a diffuse and a glossy material
-- with various imput nodes derived from a single RGBA textures.

-- table with params for the "macro" node graph
params = {}
params.type = octane.GT_STANDARD
params.name = "tex-name"
params.position = {200, 200}

-- creates the "macro" node graph, ie. root for all other nodes
root = octane.nodegraph.create(params)



-- creates some texture input modes and assign some names
inColor1 = octane.node.create{type=octane.NT_IN_TEXTURE,name="Color", graphOwner=root, position={200, 100}}
inColor2 = octane.node.create{type=octane.NT_IN_TEXTURE, name="Bump", graphOwner=root, position={450, 150}}
inColor3 = octane.node.create{type=octane.NT_IN_TEXTURE, name="Trans-Color", graphOwner=root, position={300, 100}}
inColor4 = octane.node.create{type=octane.NT_IN_TEXTURE, name="Specular", graphOwner=root, position={500, 100}}
inColor5 = octane.node.create{type=octane.NT_IN_TEXTURE, name="Opacity", graphOwner=root, position={450, 200}}
inColor6 = octane.node.create{type=octane.NT_IN_TEXTURE, name="Amount", graphOwner=root, position={350, 300}}
inColor7 = octane.node.create{type=octane.NT_IN_TEXTURE, name="Roughness", graphOwner=root, position={550, 150}}

 -- choose an input RGBA file
    local result = octane.gui.showDialog
    {
        type      = octane.gui.dialogType.FILE_DIALOG,
        title     = "Choose the color texture with alpha channel",
        wildcards = "*.png; *.psd; *.tif; *.tga",
        save      = false
    }
    
    -- creates an image texture node for diffuse channel
    inColor1Node = octane.node.create{type= octane.NT_TEX_IMAGE, pinOwnerNode=inColor1, pinOwnerId=octane.P_INPUT}
    print("Loading texture: ", result.result)
    inColor1Node:setAttribute(octane.A_FILENAME, result.result)

    -- creates an image texture node for bump channel
    inColor2Node = octane.node.create{type= octane.NT_TEX_FLOATIMAGE, pinOwnerNode=inColor2, pinOwnerId=octane.P_INPUT}
    inColor2Node:setAttribute(octane.A_FILENAME, result.result)

    -- creates an image texture node for transmission channel
    inColor3Node = octane.node.create{type= octane.NT_TEX_IMAGE, pinOwnerNode=inColor3, pinOwnerId=octane.P_INPUT}
    inColor3Node:setAttribute(octane.A_FILENAME, result.result)

    -- creates an image texture node for specular channel
    inColor4Node = octane.node.create{type= octane.NT_TEX_FLOATIMAGE, pinOwnerNode=inColor4, pinOwnerId=octane.P_INPUT}
    inColor4Node:setAttribute(octane.A_FILENAME, result.result)

    -- creates an image texture node for opacity channel
    inColor5Node = octane.node.create{type= octane.NT_TEX_ALPHAIMAGE, pinOwnerNode=inColor5, pinOwnerId=octane.P_INPUT}
    inColor5Node:setAttribute(octane.A_FILENAME, result.result)

    -- creates an image texture node for roughness channel
    inColor7Node = octane.node.create{type= octane.NT_TEX_FLOATIMAGE, pinOwnerNode=inColor7, pinOwnerId=octane.P_INPUT}
    inColor7Node:setAttribute(octane.A_FILENAME, result.result)

--set the name of the material as the name of the texture
fileName = octane.file.getFileNameWithoutExtension(result.result)
    print (fileName)
root : updateProperties{name=fileName}

--crate the float node for the ammount channel
inColor6Node = octane.node.create{type=octane.NT_TEX_FLOAT, pinOwnerNode=inColor6, pinOwnerId=octane.P_INPUT}

-- change some attributes for the nodes
inColor1Node:setPinValue(octane.P_POWER, {0.9, 0.9, 0.9})
inColor2Node:setPinValue(octane.P_POWER, {0.3, 0.3, 0.3})
inColor3Node:setPinValue(octane.P_GAMMA,  1.6)
inColor4Node:setPinValue(octane.P_GAMMA,  1.6)
inColor6Node:setAttribute(octane.A_VALUE, {0.5, 0.5, 0.5})
inColor7Node:setPinValue(octane.P_GAMMA,  3.2)

-- creates the output pin, material type
outMat = octane.node.create{type=octane.NT_OUT_MATERIAL, name=fileName, graphOwner=root, position={450, 350}}

-- creates two materials and a material mix node
diffuse = octane.node.create{type=octane.NT_MAT_DIFFUSE, name="Diffuse", graphOwner=root, position={300, 250}}
glossy = octane.node.create{type=octane.NT_MAT_GLOSSY, name="Glossy", graphOwner=root, position={600, 250}}
matMix = octane.node.create{type=octane.NT_MAT_MIX, name="MatMix", graphOwner=root, position={450, 300}}

-- connects everything
diffuse:connectTo(octane.P_DIFFUSE, inColor1)
diffuse:connectTo(octane.P_TRANSMISSION, inColor3)
diffuse:connectTo(octane.P_BUMP, inColor2)
diffuse:connectTo(octane.P_OPACITY, inColor5)
glossy:connectTo(octane.P_DIFFUSE, inColor1)
glossy:connectTo(octane.P_BUMP, inColor2)
glossy:connectTo(octane.P_SPECULAR, inColor4)
glossy:connectTo(octane.P_ROUGHNESS, inColor7)
glossy:connectTo(octane.P_OPACITY, inColor5)
matMix:connectTo(octane.P_MATERIAL1, diffuse)
matMix:connectTo(octane.P_MATERIAL2, glossy)
matMix:connectTo(octane.P_AMOUNT, inColor6)
outMat:connectTo(octane.P_INPUT, matMix)

--reorganize all the nodes in the graph
octane.nodegraph.unfold(root, false)