animation/characters/work/lena/04_review.py

# Stage 4: review renders + numeric profile gates for the hires sculpt.
#   blender --background --python 04_review.py -- <03_sculpted.blend> <review_dir>
import bpy, sys, os, math, time
import numpy as np
from mathutils import Vector

argv = sys.argv[sys.argv.index("--") + 1:]
BLEND, OUT = argv[0], argv[1]
os.makedirs(OUT, exist_ok=True)
t0 = time.time()


def log(m):
    print(f"[review {time.time()-t0:6.1f}s] {m}", flush=True)


bpy.ops.wm.open_mainfile(filepath=BLEND)
ob = max([o for o in bpy.data.objects if o.type == 'MESH'],
         key=lambda o: len(o.data.vertices))
me = ob.data
n_v = len(me.vertices)

co = np.empty(n_v * 3, dtype=np.float64)
me.vertices.foreach_get("co", co)
co = co.reshape(-1, 3)

# ---------- numeric gates ----------
front = co[:, 1] < 0
print("\n=== PROFILE y(z) at sternum x=0 (front) ===")
for z0 in np.arange(0.58, 0.78, 0.01):
    m = front & (np.abs(co[:, 0]) < 0.004) & (np.abs(co[:, 2] - z0) < 0.005)
    if m.sum():
        print(f"  z={z0:.2f}  y={co[m,1].min():+.4f}")
print("=== PROFILE y(z) at apex x=0.034 ===")
for z0 in np.arange(0.58, 0.78, 0.01):
    m = front & (np.abs(co[:, 0] - 0.034) < 0.005) & (np.abs(co[:, 2] - z0) < 0.005)
    if m.sum():
        print(f"  z={z0:.2f}  y={co[m,1].min():+.4f}")
print("=== PROFILE y(x) at z=0.688 ===")
for x0 in np.arange(-0.10, 0.101, 0.01):
    m = front & (np.abs(co[:, 0] - x0) < 0.005) & (np.abs(co[:, 2] - 0.688) < 0.006)
    if m.sum():
        print(f"  x={x0:+.2f}  y={co[m,1].min():+.4f}")

# ---------- renders ----------
scn = bpy.context.scene
w = bpy.data.worlds.new("W")
w.color = (0.22, 0.22, 0.24)
scn.world = w
key = bpy.data.objects.new("Key", bpy.data.lights.new("Key", 'SUN'))
key.data.energy = 3.0
key.data.use_shadow = False
bpy.context.collection.objects.link(key)
fill = bpy.data.objects.new("Fill", bpy.data.lights.new("Fill", 'SUN'))
fill.data.energy = 1.0
fill.data.use_shadow = False
bpy.context.collection.objects.link(fill)
cam = bpy.data.objects.new("Cam", bpy.data.cameras.new("Cam"))
cam.data.lens = 85
bpy.context.collection.objects.link(cam)
scn.camera = cam
scn.render.engine = 'BLENDER_EEVEE' if bpy.app.version >= (4, 2) else 'BLENDER_EEVEE_NEXT'
scn.render.resolution_x = scn.render.resolution_y = 1000

clay_mat = bpy.data.materials.new("Clay")
clay_mat.use_nodes = True
clay_mat.node_tree.nodes["Principled BSDF"].inputs["Base Color"].default_value = (0.62, 0.60, 0.58, 1)
clay_mat.node_tree.nodes["Principled BSDF"].inputs["Roughness"].default_value = 0.45
orig_mats = [ms.material for ms in ob.material_slots]


def shoot(tag, ctr, span, yaw_deg, clay):
    if clay:
        for ms in ob.material_slots:
            ms.material = clay_mat
    else:
        for ms, m in zip(ob.material_slots, orig_mats):
            ms.material = m
    yaw = math.radians(yaw_deg)
    dist = span * 3.0
    cam.location = Vector(ctr) + Vector((math.sin(yaw) * dist, -math.cos(yaw) * dist, 0.02))
    cam.rotation_euler = (Vector(ctr) - cam.location).to_track_quat('-Z', 'Y').to_euler()
    key.rotation_euler = (math.radians(62), 0, math.radians(35 + yaw_deg))
    fill.rotation_euler = (math.radians(75), 0, math.radians(yaw_deg - 110))
    scn.render.filepath = os.path.join(OUT, f"{tag}.png")
    bpy.ops.render.render(write_still=True)
    log(f"render {tag}")


CHEST = (0.0, 0.0, 0.675)
HIP = (0.0, 0.0, 0.53)
FULL = (0.0, 0.0, 0.50)
for yaw in (0, 40, 90):
    shoot(f"chest_clay_{yaw}", CHEST, 0.22, yaw, True)
    shoot(f"chest_tex_{yaw}", CHEST, 0.22, yaw, False)
shoot("hip_clay_0", HIP, 0.22, 0, True)
shoot("full_clay_0", FULL, 0.55, 0, True)
shoot("full_clay_40", FULL, 0.55, 40, True)
print("REVIEW_DONE")