Fail on non-finite dial values and results

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

1 files changed, 10 insertions, 1 deletions

diff --git a/generat3d/evaluate.py b/generat3d/evaluate.py
index c1a9f1b..173a78f 100644
--- a/generat3d/evaluate.py
+++ b/generat3d/evaluate.py
@@ -15,6 +15,11 @@
 # 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
 
 
@@ -26,8 +31,12 @@ def evaluate(scene):
     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
+            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