Evaluate scenes into morphed vertices and rest data

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/generat3d/evaluate.py b/generat3d/evaluate.py
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+++ b/generat3d/evaluate.py
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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.
+
+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:
+            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}
+    return verts, rest