private void CutMesh(CuttingMesh cuttingMesh)
{
positiveMesh = new MeshBuilder();
negativeMesh = new MeshBuilder();
bool[] sides = new bool[3];
int[] indices;
int p1, p2, p3;
indices = cuttingMesh.GetMesh().triangles;
for (int i = 0; i < indices.Length; i += 3)
{
p1 = indices[i];
p2 = indices[i + 1];
p3 = indices[i + 2];
sides[0] = cutPlane.GetSide(cuttingMesh.GetMesh().vertices[p1]);
sides[1] = cutPlane.GetSide(cuttingMesh.GetMesh().vertices[p2]);
sides[2] = cutPlane.GetSide(cuttingMesh.GetMesh().vertices[p3]);
if (sides[0] == sides[1] && sides[0] == sides[2])
{
if (sides[0])
{
positiveMesh.AddTriangle(
new Vector3[] { cuttingMesh.GetMesh().vertices[p1], cuttingMesh.GetMesh().vertices[p2], cuttingMesh.GetMesh().vertices[p3] },
new Vector3[] { cuttingMesh.GetMesh().normals[p1], cuttingMesh.GetMesh().normals[p2], cuttingMesh.GetMesh().normals[p3] });
}
else
{
negativeMesh.AddTriangle(
new Vector3[] { cuttingMesh.GetMesh().vertices[p1], cuttingMesh.GetMesh().vertices[p2], cuttingMesh.GetMesh().vertices[p3] },
new Vector3[] { cuttingMesh.GetMesh().normals[p1], cuttingMesh.GetMesh().normals[p2], cuttingMesh.GetMesh().normals[p3] });
}
}
}
Material[] mats = cuttingMesh.Materials;
Mesh positiveHalfMesh = positiveMesh.CreateMesh();
positiveHalfMesh.name = "Split Mesh Positive";
Mesh negativeHalfMesh = negativeMesh.CreateMesh();
negativeHalfMesh.name = "Split Mesh Negative";
cuttingMesh.SetMesh(positiveHalfMesh);
GameObject negativeSideObj = new GameObject("negative side", typeof(MeshFilter), typeof(MeshRenderer), typeof(CuttingMesh));
negativeSideObj.transform.position = cuttingMesh.ObjTransform.position;
negativeSideObj.transform.rotation = cuttingMesh.ObjTransform.rotation;
negativeSideObj.GetComponent <MeshFilter>().mesh = negativeHalfMesh;
negativeSideObj.GetComponent <MeshRenderer>().materials = mats;
negativeSideObj.transform.localScale = cuttingMesh.ObjTransform.localScale;
}
private void FindCuttingMesh(Plane plane)
{
RaycastHit hit;
var screenPos = Camera.main.WorldToScreenPoint(position);
Ray ray = Camera.main.ScreenPointToRay(screenPos);
if (Physics.Raycast(ray, out hit, Mathf.Infinity))
{
//Debug.DrawLine(position, hit.transform.position, Color.red, 100);
CuttingMesh cutMesh = hit.collider.gameObject.GetComponent <CuttingMesh>();
if (cutMesh != null)
{
cutMesh.Cut(plane);
}
}
}
