Extrude Uniform

The is an util node group for modeling.

Extrude Uniform

from pynodes import *


@tree
def line_to_wall(curve: Curve):

    offset = NoiseTexture(scale=0.5).color.map_range(to_min=(-0.5, -0.5, 0), to_max=(0.5, 0.5, 0))

    mesh = curve.subdivide(30).set_position(offset=offset).to_mesh()

    mesh = mesh.extrude_edges(offset=(0, 0, 1)).mesh

    return mesh


@tree
def extrude_uniform(mesh: Mesh, thickness: Float = 0.2):

    # The normal here is the average of the normal vector of the
    # surface connected to the current point
    with frame("Evaluate normal on faces"):
        normal = mesh.evaluate_vector_on_faces(mesh.normal)

    # The following tree fomula is equivalent
    with frame("Scale normal"):

        normal1 = normal.normalized * (1 / normal.length)
        normal1.node.label = "Method 1"

        normal2 = normal * (1 / normal.length**2)
        normal2.node.label = "Method 2"

        normal3 = normal * (1 / normal.dot(normal))
        normal3.node.label = "Method 3"

    # Capture the normal on the point field
    with frame("Capture normal"):

        normal = mesh.capture_vector_on_points(normal1)

    mesh, top, side = mesh.extrude_faces(offset_scale=0)

    mesh[top].set_position(offset=normal.scale(thickness))

    return mesh


from pynodes.scene import *

Scene({
    O.bezier_curve: {
        Mod.geometry_nodes @ "1": {
            "node_group": "line_to_wall"
        },
        Mod.geometry_nodes @ "2": {
            "node_group": "extrude_uniform"
        }
    }
}).load()