public MeshCutData(CutterMesh victimMesh, CutterPlane blade)
{
VictimMesh = victimMesh;
LeftSide.SetTargetMesh(victimMesh);
RightSide.SetTargetMesh(victimMesh);
Blade = blade;
}
/// <summary>
/// Perform cutting.
/// </summary>
/// <param name="target">Cut target object.</param>
/// <param name="position">Cut plane position.</param>
/// <param name="normal">Cut plane normal.</param>
/// <param name="callback">Callback for cutting process. (optional)</param>
/// <param name="userdata">User data. (optional)</param>
public void Cut(CutterTarget target, Vector3 position, Vector3 normal, CutterCallback callback = null, object userdata = null)
{
_normal = normal;
// Create convert matrix for position.
Matrix4x4 worldToLocMat = target.MeshTransform.worldToLocalMatrix;
if (target.NeedsConvertLocal)
{
Matrix4x4 scaleMat = Matrix4x4.Scale(target.MeshTransform.lossyScale);
worldToLocMat = scaleMat * worldToLocMat;
}
Vector4 pos = new Vector4(position.x, position.y, position.z, 1f);
Vector3 localPos = worldToLocMat * pos;
// Create convert matrix for normal.
Vector3 nor = new Vector4(normal.x, normal.y, normal.z, 1f);
Vector4 c0 = worldToLocMat.GetColumn(0);
Vector4 c1 = worldToLocMat.GetColumn(1);
Vector4 c2 = worldToLocMat.GetColumn(2);
Vector4 c3 = new Vector4(0, 0, 0, 1f);
Matrix4x4 worldToLocNormMat = new Matrix4x4();
worldToLocNormMat.SetColumn(0, c0);
worldToLocNormMat.SetColumn(1, c1);
worldToLocNormMat.SetColumn(2, c2);
worldToLocNormMat.SetColumn(3, c3);
worldToLocNormMat = worldToLocNormMat.inverse.transpose;
Vector3 localNor = worldToLocNormMat * nor;
localNor.Normalize();
CutterPlane blade = new CutterPlane(localPos, localNor);
CutterInfo info = new CutterInfo
{
CutterTarget = target,
CutterObject = new CutterObject(target, _needAnimation),
CutterPlane = blade,
CutterCallback = callback,
UserData = userdata,
};
_worker.Cut(info);
}
/// <summary>
/// Cut the specified victim, blade_plane and capMaterial.
/// （指定された「victim」をカットする。ブレード（平面）とマテリアルから切断を実行する）
/// </summary>
/// <param name="victim">Victim.</param>
/// <param name="blade_plane">Blade plane.</param>
public CutterMesh[] Cut(CutterObject victim, CutterPlane blade)
{
// 対象のメッシュを取得
MeshCutData data = new MeshCutData(victim.CutterMesh, blade);
// ここでの「3」はトライアングル
bool[] sides = new bool[3];
int[] indices;
int p1, p2, p3;
// go throught the submeshes
// サブメッシュの数だけループ
for (int sub = 0; sub < victim.SubMeshCount; sub++)
{
// サブメッシュのインデックス数を取得
indices = victim.CutterMesh.GetIndices(sub);
// List<List<int>>型のリスト。サブメッシュ一つ分のインデックスリスト
data.LeftSide.SubIndices.Add(new List <int>()); // 左
data.RightSide.SubIndices.Add(new List <int>()); // 右
// サブメッシュのインデックス数分ループ
for (int i = 0; i < indices.Length; i += 3)
{
// p1 - p3のインデックスを取得。つまりトライアングル
p1 = indices[i + 0];
p2 = indices[i + 1];
p3 = indices[i + 2];
// それぞれ評価中のメッシュの頂点が、冒頭で定義された平面の左右どちらにあるかを評価。
// `GetSide` メソッドによりboolを得る。
sides[0] = blade.GetSide(data.VictimMesh.Vertices[p1]);
sides[1] = blade.GetSide(data.VictimMesh.Vertices[p2]);
sides[2] = blade.GetSide(data.VictimMesh.Vertices[p3]);
// whole triangle
// 頂点０と頂点１および頂点２がどちらも同じ側にある場合はカットしない
if (sides[0] == sides[1] && sides[0] == sides[2])
{
if (sides[0])
{ // left side
// GetSideメソッドでポジティブ（true）の場合は左側にあり
data.LeftSide.AddTriangle(p1, p2, p3, sub);
}
else
{
data.RightSide.AddTriangle(p1, p2, p3, sub);
}
}
else
{ // cut the triangle
// そうではなく、どちらかの点が平面の反対側にある場合はカットを実行する
CutFace(sub, sides, p1, p2, p3, data);
}
}
}
// Check separating verticies.
if (data.LeftSide.Vertices.Count == 0 || data.RightSide.Vertices.Count == 0)
{
Debug.Log("No need cutting, because all verticies are in one side.");
return(null);
}
data.LeftSide.SubIndices.Add(new List <int>());
data.RightSide.SubIndices.Add(new List <int>());
// カット開始
Capping(data);
// 左側のメッシュを生成
// MeshCutSideクラスのメンバから各値をコピー
CutterMesh leftHalfMesh = new CutterMesh
{
Vertices = data.LeftSide.Vertices.ToArray(),
Triangles = data.LeftSide.Triangles.ToArray(),
Normals = data.LeftSide.Normals.ToArray(),
UVs = data.LeftSide.UVs.ToArray(),
BoneWeights = data.LeftSide.BoneWeights.ToArray(),
};
int[][] leftSubIndices = new int[data.LeftSide.SubIndices.Count][];
for (int i = 0; i < data.LeftSide.SubIndices.Count; i++)
{
leftSubIndices[i] = data.LeftSide.SubIndices[i].ToArray();
}
leftHalfMesh.SetIndices(leftSubIndices);
// 右側のメッシュも同様に生成
CutterMesh rightHalfMesh = new CutterMesh
{
Vertices = data.RightSide.Vertices.ToArray(),
Triangles = data.RightSide.Triangles.ToArray(),
Normals = data.RightSide.Normals.ToArray(),
UVs = data.RightSide.UVs.ToArray(),
BoneWeights = data.RightSide.BoneWeights.ToArray(),
};
int[][] rightSubIndices = new int[data.RightSide.SubIndices.Count][];
for (int i = 0; i < data.RightSide.SubIndices.Count; i++)
{
rightSubIndices[i] = data.RightSide.SubIndices[i].ToArray();
}
rightHalfMesh.SetIndices(rightSubIndices);
Debug.Log("cutter finish");
// 左右のGameObjectの配列を返す
return(new CutterMesh[] { leftHalfMesh, rightHalfMesh });
}