.coverage

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.gitignore

-Original file line number
+Diff line change
@@ Expand Up / @@ -89,4 +89,5 @@ MANIFEST @@
     build/
     .ipynb_checkpoints/
-    dev/
+    dev/
+    .coverage

anastruct/__init__.py

-Original file line number
+Diff line change
@@ -1,3 +1,4 @@
     from anastruct.fem.system import SystemElements
     from anastruct.fem.util.load import LoadCase, LoadCombination
+    from anastruct.preprocess import truss
     from anastruct.vertex import Vertex

anastruct/fem/system.py

-Original file line number
+Diff line change
@@ Expand Up @@
                 idx = int(idx)
             else:
                 raise TypeError("Node or element id must be an integer")
-        if idx > 0:
+        if idx >= 0:
             return idx
         return max(collection) + (idx + 1)

anastruct/fem/system_components/util.py

-Original file line number
+Diff line change
@@ Expand Up / @@ -203,6 +203,48 @@ def det_node_ids( @@
         return node_ids[0], node_ids[1]
+    def add_node(
+        system: "SystemElements", point: Vertex, node_id: Optional[int] = None
+    ) -> int:
+        """Add a node, optionally with a specific ID, without adding an element
+        Args:
+            system (SystemElements): System in which the nodes are located
+            point (Vertex): Location of the node
+            node_id (Optional[int], optional): node_id to assign to the node. Defaults to None,
+                which means to use the first available node_id automatically.
+        Raises:
+            FEMException: Raised when the location is already assigned to a different node id.
+            FEMException: Raised when the node id is already assigned to a different location.
+        Returns:
+            int: The node id of the added (or existing) node
+        """
+        if point in system._vertices:
+            if node_id is not None:
+                existing_node_id = system._vertices[point]
+                if existing_node_id != node_id:
+                    raise FEMException(
+                        "Flawed inputs",
+                        f"Location {point} is already assigned to node id {existing_node_id}, "
+                        f"cannot assign to node id {node_id}.",
+                    )
+            return existing_node_id
+        if node_id is None:
+            node_id = max(system.node_map.keys(), default=0) + 1
+        elif node_id in system.node_map and system.node_map[node_id].vertex != point:
+            raise FEMException(
+                "Flawed inputs",
+                f"Node id {node_id} is already assigned to a different location.",
+            )
+        system._vertices[point] = node_id
+        system.node_map[node_id] = Node(node_id, vertex=point)
+        return node_id
     def support_check(system: "SystemElements", node_id: int) -> None:
         """Check if the node is a hinge
@@ Expand Down @@

anastruct/preprocess/__init__.py

Empty file.

Truss generator preprocessor #422

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Merged

brookshsmith merged 25 commits into master from trussGenerator

Jan 20, 2026

-Original file line number
+Diff line change
@@ Expand Up / @@ -89,4 +89,5 @@ MANIFEST @@
     build/
     .ipynb_checkpoints/
-    dev/
+    dev/
+    .coverage

-Original file line number
+Diff line change
@@ -1,3 +1,4 @@
     from anastruct.fem.system import SystemElements
     from anastruct.fem.util.load import LoadCase, LoadCombination
+    from anastruct.preprocess import truss
     from anastruct.vertex import Vertex

-Original file line number
+Diff line change
@@ Expand Up @@
                 idx = int(idx)
             else:
                 raise TypeError("Node or element id must be an integer")
-        if idx > 0:
+        if idx >= 0:
             return idx
         return max(collection) + (idx + 1)

-Original file line number
+Diff line change
@@ Expand Up / @@ -203,6 +203,48 @@ def det_node_ids( @@
         return node_ids[0], node_ids[1]
+    def add_node(
+        system: "SystemElements", point: Vertex, node_id: Optional[int] = None
+    ) -> int:
+        """Add a node, optionally with a specific ID, without adding an element
+        Args:
+            system (SystemElements): System in which the nodes are located
+            point (Vertex): Location of the node
+            node_id (Optional[int], optional): node_id to assign to the node. Defaults to None,
+                which means to use the first available node_id automatically.
+        Raises:
+            FEMException: Raised when the location is already assigned to a different node id.
+            FEMException: Raised when the node id is already assigned to a different location.
+        Returns:
+            int: The node id of the added (or existing) node
+        """
+        if point in system._vertices:
+            if node_id is not None:
+                existing_node_id = system._vertices[point]
+                if existing_node_id != node_id:
+                    raise FEMException(
+                        "Flawed inputs",
+                        f"Location {point} is already assigned to node id {existing_node_id}, "
+                        f"cannot assign to node id {node_id}.",
+                    )
+            return existing_node_id
+        if node_id is None:
+            node_id = max(system.node_map.keys(), default=0) + 1
+        elif node_id in system.node_map and system.node_map[node_id].vertex != point:
+            raise FEMException(
+                "Flawed inputs",
+                f"Node id {node_id} is already assigned to a different location.",
+            )
+        system._vertices[point] = node_id
+        system.node_map[node_id] = Node(node_id, vertex=point)
+        return node_id
     def support_check(system: "SystemElements", node_id: int) -> None:
         """Check if the node is a hinge
@@ Expand Down @@

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