35 lines
1.5 KiB
Python
35 lines
1.5 KiB
Python
"""Build shared material inputs, roughness, and bump outputs."""
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BUMP_BASE_DISTANCE = 0.001
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def build_material_nodes(group):
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nodes = group.nodes
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group_input = nodes.new("NodeGroupInput")
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group_output = nodes.new("NodeGroupOutput")
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roughness_curve = nodes.new("ShaderNodeFloatCurve")
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roughness_curve.mapping.initialize()
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curve_points = roughness_curve.mapping.curves[0].points
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curve_points[0].location = (0.0, 0.5)
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curve_points[-1].location = (1.0, 0.1)
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roughness_curve.mapping.update()
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bump = nodes.new("ShaderNodeBump")
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return group_input, group_output, roughness_curve, bump
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def connect_material_outputs(group, group_input, group_output, roughness_curve, bump, processed_alpha):
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nodes, links = group.nodes, group.links
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links.new(group_input.outputs["Color"], group_output.inputs["Color"])
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links.new(group_input.outputs["Color"], roughness_curve.inputs["Value"])
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links.new(
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roughness_curve.outputs["Value"],
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group_output.inputs["Roughness"],
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)
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links.new(processed_alpha, group_output.inputs["Alpha"])
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links.new(group_input.outputs["Color"], bump.inputs["Height"])
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bump_distance = nodes.new("ShaderNodeMath")
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bump_distance.operation = "MULTIPLY"
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bump_distance.inputs[1].default_value = BUMP_BASE_DISTANCE
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links.new(group_input.outputs["Bump Scale"], bump_distance.inputs[0])
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links.new(bump_distance.outputs[0], bump.inputs["Distance"])
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links.new(bump.outputs["Normal"], group_output.inputs["Normal"])
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