// while dragging, transform the selected handles
public void OnDrag(PointerEventData eventData)
{
Vector3 dragPos = Camera.main.ScreenToWorldPoint(eventData.position);
dragPos.z = 0;
Vector3 dragDelta = (dragStart - dragPos);
dragDelta.z = 0;
Vector3 newPos;
// alter positions based on the original position plus the drag delta
for (int i = 0; i < VertHandler.selectedHandles.Count; i++)
{
newPos = beforeDragPositions[i] - dragDelta;
Mesh m = LevelPlacer.generatedLevel.moveArea.meshFilter.mesh;
Vector3 localOldPos = LevelPlacer.generatedLevel.moveArea.transform.InverseTransformPoint(VertHandler.selectedHandles[i].transform.position);
Vector3 localnewPos = LevelPlacer.generatedLevel.moveArea.transform.InverseTransformPoint(newPos);
// check if the desired position is not crossing the triangle and if its not inside the mesh
if (!VertHelper.IsInsideMesh(m, localOldPos, localnewPos) && VertHelper.IsHandlerPositionValid(localOldPos, localnewPos))
{
// update the selection triangle verts
if (VertHandler.selectionTriangleVerts.Any(x => x == localOldPos))
{
// get all vector entries that are equal to this position and replace them with the newest position
List <int> indexes = Enumerable.Range(0, VertHandler.selectionTriangleVerts.Count).Where(k => VertHandler.selectionTriangleVerts[k] == localOldPos).ToList();
foreach (int ind in indexes)
{
VertHandler.selectionTriangleVerts[ind] = localnewPos;
}
}
VertHandler.selectedHandles[i].transform.position = newPos;
}
}
if (VertHandler.quickDragHandle != null && VertHandler.selectedHandles.Count == 0)
{
newPos = quickDragBefore - dragDelta;
Mesh m = LevelPlacer.generatedLevel.moveArea.meshFilter.mesh;
Vector3 localOldPos = LevelPlacer.generatedLevel.moveArea.transform.InverseTransformPoint(transform.position);
Vector3 localnewPos = LevelPlacer.generatedLevel.moveArea.transform.InverseTransformPoint(newPos);
// check if the desired position is not crossing the triangle and if its not inside the mesh
if (!VertHelper.IsInsideMesh(m, localOldPos, localnewPos) && VertHelper.IsHandlerPositionValid(localOldPos, localnewPos))
{
VertHandler.quickDragHandle.transform.position = newPos;
}
}
}