- added sdf folder ( doesnt work via pip or git=)

sdf/errors.py

@@ -0,0 +1,42 @@
+import warnings
+import functools
+
+
+class SDFCADError(Exception):
+    pass
+
+
+class SDFCADInfiniteObjectError(Exception):
+    """
+    Error raised when an infinite object is encountered where not suitable.
+    """
+
+    pass
+
+
+class SDFCADWarning(Warning):
+    pass
+
+
+class SDFCADAlphaQualityWarning(SDFCADWarning):
+    show = True
+
+
+def alpha_quality(decorated_fun):
+    @functools.wraps(decorated_fun)
+    def wrapper(*args, **kwargs):
+        if SDFCADAlphaQualityWarning.show:
+            warnings.warn(
+                f"{decorated_fun.__name__}() is alpha quality "
+                f"and might give wrong results. Use with care. "
+                f"Hide this warning by setting sdf.errors.SDFCADAlphaQualityWarning.show=False.",
+                SDFCADAlphaQualityWarning,
+            )
+            with warnings.catch_warnings():
+                # Don't reissue nested alpha quality warnings
+                warnings.simplefilter("ignore", SDFCADAlphaQualityWarning)
+                return decorated_fun(*args, **kwargs)
+        else:
+            return decorated_fun(*args, **kwargs)
+
+    return wrapper