Blender Python编程创建发光材质示例详解

def create_emission_shader(color, strength, mat_name):
    # create a new material resource (with its
    # associated shader)
    mat = bpy.data.materials.new(mat_name)
    # enable the node-graph edition mode
    mat.use_nodes = True
    # clear all starter nodes
    nodes = mat.node_tree.nodes
    nodes.clear()
    # add the Emission node
    node_emission = nodes.new(type="ShaderNodeEmission")
    # (input[0] is the color)
    node_emission.inputs[0].default_value = color
    # (input[1] is the strength)
    node_emission.inputs[1].default_value = strength
    # add the Output node
    node_output = nodes.new(type="ShaderNodeOutputMaterial")
    # link the two nodes
    links = mat.node_tree.links
    link = links.new(node_emission.outputs[0], node_output.inputs[0])
    # return the material reference
    return mat

# ...
N_PLANETS = 6
ring_mat = create_emission_shader(
    (1, 1, 1, 1), 1, "RingMat"
)
for n in range(N_PLANETS):
    # ...
    planet = create_sphere(r, d, "Planet-{:02d}".format(n))
    planet.data.materials.append(
        create_emission_shader(
            (random(), random(), 1, 1),
            2,
            "PlanetMat-{:02d}".format(n)
        )
    )
    # add the radius ring display
    ring = create_torus(d, "Radius-{:02d}".format(n))
    ring.data.materials.append(ring_mat)
# add the sun sphere
sun = create_sphere(12, 0, "Sun")
sun.data.materials.append(
    create_emission_shader(
        (1, 0.66, 0.08, 1), 10, "SunMat"
    )
)