//Для выполнения операции выделить 2 MeshInSpace. Результат будет помещен в первый MeshInSpace. Если операция Union то в первом MeshInSpace объединятся все geometry.
//Для операций Intersect,Subtract, geometry из первого MeshInSpace обрабатываются раздельно.
//На основе библиотеки Net3dBool. Эта библиотека после действия возвращает массив Vector3[] positions, int[] indices. Данные о Structure теряются.
//Потом автоматически строится простая Structure, расчитываются нормали.
//BoolActionEnum.Union - Implements constructive solid geometry union operation for two selected Mesh In Space objects:
//BoolActionEnum.Subtruct - Implements constructive solid geometry difference operation for two selected Mesh In Space objects.
// The result object will be the first selected mesh minus the second selected mesh.
//BoolActionEnum.Intersect - Implements constructive solid geometry intersect operation for two selected Mesh In Space objects.
public static void BoolAction(ActionContext actionContext, BoolActionEnum boolAction)
{
if (actionContext.SelectionMode != SelectionMode.Object)
{
return;
}
void Exec(Component_MeshInSpace[] selectedMeshInSpaces, UndoMultiAction undoForMeshes, UndoMultiAction undoForOtherActions)
{
if (selectedMeshInSpaces.Length != 2)
{
return;
}
BoolActionExecute(selectedMeshInSpaces[0], selectedMeshInSpaces[1], undoForMeshes, actionContext.DocumentWindow?.Document, boolAction);
}
ExecuteAction(actionContext, Exec);
}
public static void BoolActionExecute(Component_MeshInSpace firstMeshInSpace, Component_MeshInSpace secondMeshInSpace, UndoMultiAction undo, DocumentInstance document, BoolActionEnum boolAction)
{
//the first operand of the union operation must be a single geometry, otherwise duplicate parts will be made.
if (boolAction == BoolActionEnum.Union && 1 < firstMeshInSpace.Mesh.Value.GetComponents <Component_MeshGeometry>().Length)
{
MergeGeometries(firstMeshInSpace.Mesh, document, undo);
}
bool needUndoForNextActions = true;
CommonFunctions.ConvertProceduralMeshGeometries(document, firstMeshInSpace.Mesh, undo, ref needUndoForNextActions);
List <(Vector3F[] positions, int[] indices)> data1List = GetData(firstMeshInSpace);
(Vector3F[] positions, int[] indices)data2 = MergeData(GetData(secondMeshInSpace));
//convert the second mesh in space, to the transform of first mesh in space
var matrix = firstMeshInSpace.Transform.Value.ToMatrix4().GetInverse() * secondMeshInSpace.Transform.Value.ToMatrix4();
Net3dBool.Vector3[] vertices2 = new Net3dBool.Vector3[data2.positions.Length];
for (int i = 0; i < data2.positions.Length; i++)
{
vertices2[i] = ToNet3DBoolVector3((matrix * data2.positions[i]).ToVector3F());
}
var operand2 = new Net3dBool.Solid(vertices2, data2.indices);
var geometries = firstMeshInSpace.Mesh.Value.GetComponents <Component_MeshGeometry>();
var resultGeometries = new List <(Vector3F[] positions, int[] indices, MeshData.MeshGeometryFormat format)>();
var geometriesToDelete = new List <Component_MeshGeometry>();
for (int geomIndex = 0; geomIndex < data1List.Count; geomIndex++)
{
var data1 = data1List[geomIndex];
Net3dBool.Vector3[] vertices1 = data1.positions.Select(ToNet3DBoolVector3).ToArray();
var modeller = new Net3dBool.BooleanModeller(new Net3dBool.Solid(vertices1, data1.indices), operand2); //Большую часть времени на вычисления занимает эта сторка
Net3dBool.Solid result = null;
switch (boolAction)
{
case BoolActionEnum.Union: result = modeller.GetUnion(); break;
case BoolActionEnum.Intersect: result = modeller.GetIntersection(); break;
case BoolActionEnum.Subtract: result = modeller.GetDifference(); break;
default: return;
}
var newVertices = result.getVertices().Select(ToVector3F).ToArray();
if (0 < newVertices.Length)
{
resultGeometries.Add((newVertices, result.getIndices(), new MeshData.MeshGeometryFormat(geometries[geomIndex].VertexStructure)));
}
else
{
geometriesToDelete.Add(geometries[geomIndex]);
}
}
foreach (var g in resultGeometries)
{
if (!CheckValid(g.positions, g.indices))
{
throw new Exception();
}
}
//delete empty mesh geometry //
if (0 < geometriesToDelete.Count)
{
undo?.AddAction(new UndoActionComponentCreateDelete(document, geometriesToDelete.ToArray(), create: false));
}
var meshData = MeshData.BuildFromRaw(resultGeometries);
meshData?.Save(firstMeshInSpace.Mesh.Value, needUndoForNextActions ? undo : null, null); //??? No selection?
firstMeshInSpace.Mesh.Value?.RebuildStructure();
}
