Initial Commit

2025-07-04 20:33:06 +03:00
commit 8f09347ae0
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+/*=========================================================================
+
+   Library: iMSTK-Unity
+
+   Copyright (c) Kitware, Inc. 
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0.txt
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+=========================================================================*/
+
+using UnityEngine;
+
+namespace ImstkUnity
+{
+    /// <summary>
+    /// Makes a deformable object tearable
+    /// </summary>
+    /// Currently this is only well tested in iMSTK with Line Meshes
+    /// Notes: Tearable is the first iMSTK Component figure out interfaces
+    /// Currently PbdObject is still a SceneObject (which is an entity)
+    /// This means we need to have it initialized before we can add ourselves
+    /// to it
+    public class Tearable : ImstkBehaviour
+    {
+        Imstk.Tearable _tearable;
+        public float maxStrain = 0f;
+        protected override void OnImstkInit()
+        {
+            _tearable = new Imstk.Tearable();
+            _tearable.setMaxStrain((double)maxStrain);
+
+
+            var pbdObject = FindPbdObject();
+            if (pbdObject != null)
+            {
+                pbdObject.addComponent(Imstk.Utils.CastTo<Imstk.Component>(_tearable));
+            }
+            else
+            {
+                Debug.LogWarning("Could not find a PbdObject on the current gameobject, tearable not initialized");
+            }
+        }
+
+        public Imstk.SceneObject GetSceneObject()
+        {
+            return Imstk.Utils.CastTo<Imstk.SceneObject>(_tearable);
+        }
+
+        private Imstk.PbdObject FindPbdObject()
+        {
+            {
+                var deformable = GetComponent<DynamicalModel>();
+                if (deformable != null)
+                {
+                    deformable.dynamicGeometry = true;
+                    deformable.ImstkInit();
+                    var dynamicalModel = deformable.GetDynamicObject();
+                    var pbdObject = Imstk.Utils.CastTo<Imstk.PbdObject>(dynamicalModel);
+                    return pbdObject;
+                }
+                return null;
+            }
+        }
+
+    }
+}