private MeshCutResult CreatePlaneMesh()
{
MeshCutResult r = new MeshCutResult();
r.AddRectangle(0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0);
return(r);
}
private MeshCutResult ConvertMeshToMeshCutResult(Mesh m)
{
MeshCutResult r = new MeshCutResult();
r.vertices.AddRange(m.vertices);
r.colors.AddRange(m.colors32);
r.indices.AddRange(m.GetIndices(0));
r.uv.AddRange(m.uv);
//Debug.Log(string.Join(",", r.vertices));
return(r);
}
private Mesh ConvertMeshCutResultToMesh(MeshCutResult r)
{
Mesh m = new Mesh();
m.SetVertices(r.vertices);
m.SetColors(r.colors);
m.SetIndices(r.indices.ToArray(), MeshTopology.Triangles, 0);
m.SetUVs(0, r.uv);
m.RecalculateBounds();
m.RecalculateNormals();
return(m);
}
// Update is called once per frame
void Update()
{
// Vector3でマウス位置座標を取得する
Vector3 screenPos = Input.mousePosition;
// Z軸修正
screenPos.z = 10f;
// マウス位置座標をスクリーン座標からワールド座標に変換する
mousePos = Camera.main.ScreenToWorldPoint(screenPos);
if (Input.GetMouseButtonDown(0))
{
origin = mousePos;
}
if (Input.GetMouseButton(0))
{
//Debug.DrawLine(origin, mousePos);
}
if (Input.GetMouseButtonUp(0))
{
MeshCutResult result1 = new MeshCutResult(), result2 = new MeshCutResult();
MeshCut2D.MeshCut2D.Cut(meshCR.vertices, meshCR.uv, meshCR.indices, meshCR.indices.Count, origin.x - transform.position.x, origin.y - transform.position.y, mousePos.x - transform.position.x, mousePos.y - transform.position.y, result1, result2);
Mesh m = ConvertMeshCutResultToMesh(result1);
if (m.vertexCount != 0)
{
GameObject obj = Instantiate(meshPrefab, transform.position, transform.rotation);
MeshFilter fil = obj.GetComponent <MeshFilter>();
fil.sharedMesh = m;
MeshCollider col = obj.GetComponent <MeshCollider>();
col.sharedMesh = m;
}
m = ConvertMeshCutResultToMesh(result2);
if (m.vertexCount != 0)
{
GameObject obj = Instantiate(meshPrefab, transform.position, transform.rotation);
MeshFilter fil = obj.GetComponent <MeshFilter>();
fil.sharedMesh = m;
MeshCollider col = obj.GetComponent <MeshCollider>();
col.sharedMesh = m;
}
Destroy(meshFilter.gameObject);
}
/*
* for (int i = 0; i < result1.indices.Count / 3; i++)
* {
* for (int j = 0; j < 3; j++)
* {
* Vector2 from = result1.vertices[result1.indices[i * 3 + j]];
* Vector2 to = result1.vertices[result1.indices[i * 3 + (j + 1) % 3]];
* Debug.DrawLine(from, to);
* }
* }
*
* for (int i = 0; i < result2.indices.Count / 3; i++)
* {
* for (int j = 0; j < 3; j++)
* {
* Vector2 from = result2.vertices[result2.indices[i * 3 + j]];
* Vector2 to = result2.vertices[result2.indices[i * 3 + (j + 1) % 3]];
* Debug.DrawLine(from, to);
* }
* }
*/
/*
* private void OnDrawGizmos()
* {
* if (meshFilter != null)
* {
* Mesh mesh = meshFilter.mesh;
*
* for (int i = 0; i < mesh.vertexCount / 3; i++)
* {
* for (int j = 0; j < 3; j++)
* {
* Vector2 from = mesh.vertices[i * 3 + j];
* Vector2 to = mesh.vertices[i * 3 + (j + 1) % 3];
* Vector2 v = from - originPos;
* Vector2 v1 = (Vector2)transform.position - originPos;
* Vector2 v2 = to - from;
* float cross = Cross2D(v1, v2);
* if (cross != 0f)
* {
* float t1 = Cross2D(v, v2) / cross;
* float t2 = Cross2D(v, v1) / cross;
* if (t1 >= 0 && t1 <= 1 && t2 >= 0 && t2 <= 1)
* {
* Vector2 hitPos = from + t2 * v2;
* Gizmos.color = Color.red;
* GizmosExtensions2D.DrawWireCircle2D(hitPos, 0.1f);
* Debug.Log("point:" + hitPos);
* }
* }
* Gizmos.color = Color.white;
* Gizmos.DrawLine(from, to);
* }
* }
* }
* Gizmos.color = Color.white;
* GizmosExtensions2D.DrawArrow2D(originPos, transform.position);
* }
*/
}
// Use this for initialization
void Start()
{
meshFilter = GetComponent <MeshFilter>();
meshCR = ConvertMeshToMeshCutResult(meshFilter.mesh);
}