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# generat3D - evaluate Daz DSON scenes and write .dbz files
# Copyright (C) 2026 Danilo M. <danix@danix.xyz>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import math
import numpy as np
from . import Error
from .scene import AXES, REST_CHANNELS, key
def evaluate(scene):
"""Morphed rest vertices and per-node rest channels {node id: {channel: [x, y, z]}}."""
values = scene.graph.evaluate()
fig = scene.figure
verts = fig.verts.copy()
for k, (idx, deltas) in fig.morphs.items():
w = values.get(k, 0.0)
if w:
with np.errstate(all="ignore"):
verts[idx] += w * deltas # indices are unique within one morph
rest = {n.id: {ch: [values[key(n.id, n.id, f"{ch}/{a}")] for a in AXES]
for ch in REST_CHANNELS}
for n in fig.nodes}
if (not np.isfinite(verts).all()
or not all(math.isfinite(v) for r in rest.values() for c in r.values() for v in c)):
raise Error("evaluation produced non-finite values")
return verts, rest
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