Face UV

This example visualizes the UV coordinates of a face model in two ways. The first way uses checkerboard texture to visualize UV. The second way visualize the UV mesh with the 3D normal field.

Data

The face mesh is the connonical face model released by Google as part of the MediaPipe project (Apache-2.0 license).

Code

#!/usr/bin/env python

import hakowan as hkw

# Step 1: Setup the configurtion for portrait.
config = hkw.config()
config.film.width = 800
config.film.height = 1024
config.sensor.location = [1.0, 0.5, 3]

# Step 2: Render the 3D face mesh.
face = hkw.layer("data/canonical_face_model.obj")
hkw.render(face, config, filename="results/face.png")


# Step 3: Render the 3D face mesh with checkerboard pattern.
face_checkerboard = face.material(
    "Principled",
    color=hkw.texture.Checkerboard(size=8),
    roughness=0.1,
)
hkw.render(face_checkerboard, config, filename="results/face_checkerboard.png")

# Step 4: Render the UV mesh with 3D normal field.
face_uv = (
    face.transform(hkw.transform.Compute(vertex_normal="normal"))
    .transform(hkw.transform.UVMesh())
    .channel(normal="normal")
    .material("Diffuse", "ivory")
)
config.film.width = 1024
config.film.height = 800
config.sensor = hkw.setup.sensor.Orthographic()
hkw.render(face_uv, config, filename="results/face_uv.png")