public static void Cut(GameObject _originalGameObject,
Vector3 _contactPoint,
Vector3 _direction,
Material _cutMaterial = null,
bool _fill = true,
bool _addRigidbody = false)
{
if (currentlyCutting)
{
return;
}
currentlyCutting = true;
Plane plane = new Plane(_originalGameObject.transform.InverseTransformDirection(-_direction),
_originalGameObject.transform.InverseTransformDirection(_contactPoint));
originalMesh = _originalGameObject.GetComponent <MeshFilter>().mesh;
List <Vector3> addedVertices = new List <Vector3>();
GeneratedMesh leftMesh = new GeneratedMesh();
GeneratedMesh rightMesh = new GeneratedMesh();
int[] submeshIndices;
int triangleIndexA, triangleIndexB, triangleIndexC;
for (int i = 0; i < originalMesh.subMeshCount; ++i)
{
submeshIndices = originalMesh.GetTriangles(i);
for (int j = 0; j < submeshIndices.Length; j += 3)
{
triangleIndexA = submeshIndices[j];
triangleIndexB = submeshIndices[j + 1];
triangleIndexC = submeshIndices[j + 2];
MeshTriangle currentTriangle = GetTriangle(triangleIndexA, triangleIndexB, triangleIndexC, i);
bool triangleALeftSide = plane.GetSide(originalMesh.vertices[triangleIndexA]);
bool triangleBLeftSide = plane.GetSide(originalMesh.vertices[triangleIndexB]);
bool triangleCLeftSide = plane.GetSide(originalMesh.vertices[triangleIndexC]);
if (triangleALeftSide && triangleBLeftSide && triangleCLeftSide)
{
leftMesh.AddTriangle(currentTriangle);
}
else if (!triangleALeftSide && !triangleBLeftSide && !triangleCLeftSide)
{
rightMesh.AddTriangle(currentTriangle);
}
else
{
CutTriangle(plane, currentTriangle, triangleALeftSide, triangleBLeftSide, triangleCLeftSide, leftMesh, rightMesh, addedVertices);
}
}
}
if (_fill)
{
FillCut(addedVertices, plane, leftMesh, rightMesh);
}
originalMesh.Clear();
originalMesh.vertices = leftMesh.Vertices.ToArray();
originalMesh.normals = leftMesh.Normals.ToArray();
originalMesh.uv = leftMesh.UVs.ToArray();
originalMesh.triangles = leftMesh.Indices(0);
GameObject secondGameObject = GameObject.Instantiate(_originalGameObject);
Mesh secondMesh = secondGameObject.GetComponent <MeshFilter>().mesh;
secondMesh.vertices = rightMesh.Vertices.ToArray();
secondMesh.normals = rightMesh.Normals.ToArray();
secondMesh.uv = rightMesh.UVs.ToArray();
secondMesh.triangles = rightMesh.Indices(0);
Component.Destroy(_originalGameObject.GetComponent <SphereCollider>());
Component.Destroy(secondGameObject.GetComponent <SphereCollider>());
_originalGameObject.AddComponent <MeshCollider>();
secondGameObject.AddComponent <MeshCollider>();
_originalGameObject.GetComponent <MeshCollider>().convex = true;
secondGameObject.GetComponent <MeshCollider>().convex = true;
currentlyCutting = false;
}
