/// <summary>
/// cut mesh by plane
/// </summary>
/// <param name="mesh">mesh to cut</param>
/// <param name="meshTransform">transformation of the mesh</param>
/// <param name="plane">cutting plane</param>
/// <param name="triangulateHoles">flag for triangulation of holes</param>
/// <param name="crossSectionVertexColor">this color will be assigned to cross section, valid only for vertex color shaders</param>
/// <param name="crossUV">uv mapping area for cross section</param>
/// <param name="allowOpenMesh">allow cutting of open mesh</param>
/// <returns>processing time</returns>
public float Cut(ExploderMesh mesh, ExploderTransform meshTransform, Plane plane, bool triangulateHoles, bool allowOpenMesh, ref List <ExploderMesh> meshes,
Color crossSectionVertexColor, Vector4 crossUV)
{
this.crossSectionVertexColour = crossSectionVertexColor;
this.crossSectionUV = crossUV;
return(Cut(mesh, meshTransform, plane, triangulateHoles, allowOpenMesh, ref meshes));
}
private Plane GetRandomPlane(ExploderMesh mesh)
{
Vector3 normal;
((Vector3) ref normal).\u002Ector((float)(this.random.NextDouble() * 2.0 - 1.0), (float)(this.random.NextDouble() * 2.0 - 1.0), (float)(this.random.NextDouble() * 2.0 - 1.0));
this.plane.Set(normal, mesh.centroid);
return(this.plane);
}
public ExploderMesh(Mesh unityMesh)
{
this.triangles = unityMesh.get_triangles();
this.vertices = unityMesh.get_vertices();
this.normals = unityMesh.get_normals();
this.uv = unityMesh.get_uv();
this.tangents = unityMesh.get_tangents();
this.colors32 = unityMesh.get_colors32();
ExploderMesh.CalculateCentroid(new List <Vector3>((IEnumerable <Vector3>) this.vertices), ref this.centroid, ref this.min, ref this.max);
}
private Exploder.Plane GetRandomPlane(ExploderMesh mesh)
{
var randomPlaneNormal = new Vector3((float)random.NextDouble() * 2.0f - 1.0f,
(float)random.NextDouble() * 2.0f - 1.0f,
(float)random.NextDouble() * 2.0f - 1.0f);
plane.Set(randomPlaneNormal, mesh.centroid);
return(plane);
}
private Plane GetRectangularRandom(ExploderMesh mesh, int attempt)
{
int index = this.random.Next(0, 3) + attempt;
if (index > 2)
{
return(this.GetRandomPlane(mesh));
}
this.plane.Set(CuttingPlane.rectAxis[index], mesh.centroid);
return(this.plane);
}
private Exploder.Plane GetRectangularRandom(ExploderMesh mesh, int attempt)
{
var axis = random.Next(0, 3);
axis += attempt;
if (axis > 2)
{
return(GetRandomPlane(mesh));
}
plane.Set(rectAxis[axis], mesh.centroid);
return(plane);
}
private Plane GetRectangularRegularPlane(ExploderMesh mesh, int attempt)
{
float num1 = (float)(mesh.max.x - mesh.min.x);
float num2 = (float)(mesh.max.y - mesh.min.y);
float num3 = (float)(mesh.max.z - mesh.min.z);
int index = ((double)num1 <= (double)num2 ? ((double)num2 <= (double)num3 ? 2 : 1) : ((double)num1 <= (double)num3 ? 2 : 0)) + attempt;
if (index > 2)
{
return(this.GetRandomPlane(mesh));
}
this.plane.Set(CuttingPlane.rectAxis[index], mesh.centroid);
return(this.plane);
}
public Exploder.Plane GetPlane(ExploderMesh mesh, int attempt)
{
switch (core.parameters.CuttingStyle)
{
case ExploderObject.CuttingStyleOption.Random:
return(GetRandomPlane(mesh));
case ExploderObject.CuttingStyleOption.RectangularRandom:
return(GetRectangularRandom(mesh, attempt));
case ExploderObject.CuttingStyleOption.RectangularRegular:
return(GetRectangularRegularPlane(mesh, attempt));
}
return(null);
}
public Plane GetPlane(ExploderMesh mesh, int attempt)
{
switch (this.core.parameters.CuttingStyle)
{
case ExploderObject.CuttingStyleOption.Random:
return(this.GetRandomPlane(mesh));
case ExploderObject.CuttingStyleOption.RectangularRandom:
return(this.GetRectangularRandom(mesh, attempt));
case ExploderObject.CuttingStyleOption.RectangularRegular:
return(this.GetRectangularRegularPlane(mesh, attempt));
default:
return((Plane)null);
}
}
private Exploder.Plane GetRectangularRegularPlane(ExploderMesh mesh, int attempt)
{
var diffX = mesh.max.x - mesh.min.x;
var diffY = mesh.max.y - mesh.min.y;
var diffZ = mesh.max.z - mesh.min.z;
var axis = 0;
if (diffX > diffY)
{
if (diffX > diffZ)
{
axis = 0;
}
else
{
axis = 2;
}
}
else
{
if (diffY > diffZ)
{
axis = 1;
}
else
{
axis = 2;
}
}
axis += attempt;
if (axis > 2)
{
return(GetRandomPlane(mesh));
}
plane.Set(rectAxis[axis], mesh.centroid);
return(plane);
}
float Cut(ExploderMesh mesh, ExploderTransform meshTransform, Plane plane, bool triangulateHoles, bool allowOpenMesh, ref List <ExploderMesh> meshes)
{
var stopWatch = new Stopwatch();
stopWatch.Start();
#if PROFILING
MeasureIt.Begin("CutAllocations");
#endif
// cache mesh data
var trianglesNum = mesh.triangles.Length;
var verticesNum = mesh.vertices.Length;
var meshTriangles = mesh.triangles;
var meshTangents = mesh.tangents;
var meshColors = mesh.colors32;
var meshVertices = mesh.vertices;
var meshNormals = mesh.normals;
var meshUV = mesh.uv;
var useMeshTangents = meshTangents != null && meshTangents.Length > 0;
var useVertexColors = meshColors != null && meshColors.Length > 0;
var useNormals = meshNormals != null && meshNormals.Length > 0;
// preallocate buffers
AllocateBuffers(trianglesNum, verticesNum, useMeshTangents, useVertexColors);
ExploderMesh mesh0, mesh1;
#if PROFILING
MeasureIt.End("CutAllocations");
MeasureIt.Begin("CutCycleFirstPass");
#endif
// first pass - find complete triangles on both sides of the plane
for (int i = 0; i < trianglesNum; i += 3)
{
// get triangle points
var v0 = meshVertices[meshTriangles[i]];
var v1 = meshVertices[meshTriangles[i + 1]];
var v2 = meshVertices[meshTriangles[i + 2]];
var side0 = plane.GetSideFix(ref v0);
var side1 = plane.GetSideFix(ref v1);
var side2 = plane.GetSideFix(ref v2);
meshVertices[meshTriangles[i]] = v0;
meshVertices[meshTriangles[i + 1]] = v1;
meshVertices[meshTriangles[i + 2]] = v2;
// Utils.Log(plane.Pnt + " " + v0 + " " + v1 + " " + " " + v2);
// all points on one side
if (side0 == side1 && side1 == side2)
{
var idx = side0 ? 0 : 1;
if (meshTriangles[i] >= triCache.Length)
{
ExploderUtils.Log("TriCacheError " + meshTriangles[i] + " " + triCache.Length + " " + meshVertices.Length);
}
if (triCache[meshTriangles[i]] == 0)
{
triangles[idx].Add(triCounter[idx]);
vertices[idx].Add(meshVertices[meshTriangles[i]]);
uvs[idx].Add(meshUV[meshTriangles[i]]);
if (useNormals)
{
normals[idx].Add(meshNormals[meshTriangles[i]]);
}
if (useMeshTangents)
{
tangents[idx].Add(meshTangents[meshTriangles[i]]);
}
if (useVertexColors)
{
vertexColors[idx].Add(meshColors[meshTriangles[i]]);
}
centroid[idx] += meshVertices[meshTriangles[i]];
triCache[meshTriangles[i]] = triCounter[idx] + 1;
triCounter[idx]++;
}
else
{
triangles[idx].Add(triCache[meshTriangles[i]] - 1);
}
if (triCache[meshTriangles[i + 1]] == 0)
{
triangles[idx].Add(triCounter[idx]);
vertices[idx].Add(meshVertices[meshTriangles[i + 1]]);
uvs[idx].Add(meshUV[meshTriangles[i + 1]]);
if (useNormals)
{
normals[idx].Add(meshNormals[meshTriangles[i + 1]]);
}
if (useMeshTangents)
{
tangents[idx].Add(meshTangents[meshTriangles[i + 1]]);
}
if (useVertexColors)
{
vertexColors[idx].Add(meshColors[meshTriangles[i + 1]]);
}
centroid[idx] += meshVertices[meshTriangles[i + 1]];
triCache[meshTriangles[i + 1]] = triCounter[idx] + 1;
triCounter[idx]++;
}
else
{
triangles[idx].Add(triCache[meshTriangles[i + 1]] - 1);
}
if (triCache[meshTriangles[i + 2]] == 0)
{
triangles[idx].Add(triCounter[idx]);
vertices[idx].Add(meshVertices[meshTriangles[i + 2]]);
uvs[idx].Add(meshUV[meshTriangles[i + 2]]);
if (useNormals)
{
normals[idx].Add(meshNormals[meshTriangles[i + 2]]);
}
if (useMeshTangents)
{
tangents[idx].Add(meshTangents[meshTriangles[i + 2]]);
}
if (useVertexColors)
{
vertexColors[idx].Add(meshColors[meshTriangles[i + 2]]);
}
centroid[idx] += meshVertices[meshTriangles[i + 2]];
triCache[meshTriangles[i + 2]] = triCounter[idx] + 1;
triCounter[idx]++;
}
else
{
triangles[idx].Add(triCache[meshTriangles[i + 2]] - 1);
}
}
else
{
// intersection triangles add to list and process it in second pass
cutTris.Add(i);
}
}
if (vertices[0].Count == 0)
{
centroid[0] = meshVertices[0];
}
else
{
centroid[0] /= vertices[0].Count;
}
if (vertices[1].Count == 0)
{
centroid[1] = meshVertices[1];
}
else
{
centroid[1] /= vertices[1].Count;
}
// UnityEngine.Debug.LogFormat("cut: {0} -- {1}, normal: {2}, tris: {3}", vertices[0].Count, vertices[1].Count, plane.Normal, cutTris.Count);
#if PROFILING
MeasureIt.End("CutCycleFirstPass");
MeasureIt.Begin("CutCycleSecondPass");
#endif
if (cutTris.Count < 1)
{
stopWatch.Stop();
return(stopWatch.ElapsedMilliseconds);
}
AllocateContours(cutTris.Count);
// second pass - cut intersecting triangles in half
foreach (var cutTri in cutTris)
{
var triangle = new Triangle
{
ids = new[] { meshTriangles[cutTri + 0], meshTriangles[cutTri + 1], meshTriangles[cutTri + 2] },
pos = new[] { meshVertices[meshTriangles[cutTri + 0]], meshVertices[meshTriangles[cutTri + 1]], meshVertices[meshTriangles[cutTri + 2]] },
normal = useNormals ? new[] { meshNormals[meshTriangles[cutTri + 0]], meshNormals[meshTriangles[cutTri + 1]], meshNormals[meshTriangles[cutTri + 2]] } : new[] { Vector3.zero, Vector3.zero, Vector3.zero },
uvs = new[] { meshUV[meshTriangles[cutTri + 0]], meshUV[meshTriangles[cutTri + 1]], meshUV[meshTriangles[cutTri + 2]] },
tangents = useMeshTangents ? new[] { meshTangents[meshTriangles[cutTri + 0]], meshTangents[meshTriangles[cutTri + 1]], meshTangents[meshTriangles[cutTri + 2]] } : new [] { Vector4.zero, Vector4.zero, Vector4.zero },
colors = useVertexColors ? new[] { meshColors[meshTriangles[cutTri + 0]], meshColors[meshTriangles[cutTri + 1]], meshColors[meshTriangles[cutTri + 2]] } : new Color32[] { Color.white, Color.white, Color.white },
};
// check points with a plane
var side0 = plane.GetSide(triangle.pos[0]);
var side1 = plane.GetSide(triangle.pos[1]);
var side2 = plane.GetSide(triangle.pos[2]);
float t0, t1;
Vector3 s0 = Vector3.zero, s1 = Vector3.zero;
var idxLeft = side0 ? 0 : 1;
var idxRight = 1 - idxLeft;
if (side0 == side1)
{
var a = plane.IntersectSegment(triangle.pos[2], triangle.pos[0], out t0, ref s0);
var b = plane.IntersectSegment(triangle.pos[2], triangle.pos[1], out t1, ref s1);
ExploderUtils.Assert(a && b, "!!!!!!!!!!!!!!!");
// left side ... 2 triangles
var s0Left = AddIntersectionPoint(s0, triangle, triangle.ids[2], triangle.ids[0], cutVertCache[idxLeft], vertices[idxLeft], normals[idxLeft], uvs[idxLeft], tangents[idxLeft], vertexColors[idxLeft], useMeshTangents, useVertexColors, useNormals);
var s1Left = AddIntersectionPoint(s1, triangle, triangle.ids[2], triangle.ids[1], cutVertCache[idxLeft], vertices[idxLeft], normals[idxLeft], uvs[idxLeft], tangents[idxLeft], vertexColors[idxLeft], useMeshTangents, useVertexColors, useNormals);
var v0Left = AddTrianglePoint(triangle.pos[0], triangle.normal[0], triangle.uvs[0], triangle.tangents[0], triangle.colors[0], triangle.ids[0], triCache, cornerVertCache[idxLeft], vertices[idxLeft], normals[idxLeft], uvs[idxLeft], tangents[idxLeft], vertexColors[idxLeft], useMeshTangents, useVertexColors, useNormals);
var v1Left = AddTrianglePoint(triangle.pos[1], triangle.normal[1], triangle.uvs[1], triangle.tangents[1], triangle.colors[1], triangle.ids[1], triCache, cornerVertCache[idxLeft], vertices[idxLeft], normals[idxLeft], uvs[idxLeft], tangents[idxLeft], vertexColors[idxLeft], useMeshTangents, useVertexColors, useNormals);
// Triangle (s0, v0, s1)
triangles[idxLeft].Add(s0Left);
triangles[idxLeft].Add(v0Left);
triangles[idxLeft].Add(s1Left);
// Triangle (s1, v0, v1)
triangles[idxLeft].Add(s1Left);
triangles[idxLeft].Add(v0Left);
triangles[idxLeft].Add(v1Left);
// right side ... 1 triangle
var s0Right = AddIntersectionPoint(s0, triangle, triangle.ids[2], triangle.ids[0], cutVertCache[idxRight], vertices[idxRight], normals[idxRight], uvs[idxRight], tangents[idxRight], vertexColors[idxRight], useMeshTangents, useVertexColors, useNormals);
var s1Right = AddIntersectionPoint(s1, triangle, triangle.ids[2], triangle.ids[1], cutVertCache[idxRight], vertices[idxRight], normals[idxRight], uvs[idxRight], tangents[idxRight], vertexColors[idxRight], useMeshTangents, useVertexColors, useNormals);
var v2Right = AddTrianglePoint(triangle.pos[2], triangle.normal[2], triangle.uvs[2], triangle.tangents[2], triangle.colors[2], triangle.ids[2], triCache, cornerVertCache[idxRight], vertices[idxRight], normals[idxRight], uvs[idxRight], tangents[idxRight], vertexColors[idxRight], useMeshTangents, useVertexColors, useNormals);
// Triangle (v2, s0, s1)
triangles[idxRight].Add(v2Right);
triangles[idxRight].Add(s0Right);
triangles[idxRight].Add(s1Right);
// buffer intersection vertices for triangulation
if (triangulateHoles)
{
if (idxLeft == 0)
{
contour.AddTriangle(cutTri, s0Left, s1Left, s0, s1);
}
else
{
contour.AddTriangle(cutTri, s0Right, s1Right, s0, s1);
}
}
}
else if (side0 == side2)
{
var a = plane.IntersectSegment(triangle.pos[1], triangle.pos[0], out t0, ref s1);
var b = plane.IntersectSegment(triangle.pos[1], triangle.pos[2], out t1, ref s0);
ExploderUtils.Assert(a && b, "!!!!!!!!!!!!!");
// left side ... 2 triangles
var s0Left = AddIntersectionPoint(s0, triangle, triangle.ids[1], triangle.ids[2], cutVertCache[idxLeft], vertices[idxLeft], normals[idxLeft], uvs[idxLeft], tangents[idxLeft], vertexColors[idxLeft], useMeshTangents, useVertexColors, useNormals);
var s1Left = AddIntersectionPoint(s1, triangle, triangle.ids[1], triangle.ids[0], cutVertCache[idxLeft], vertices[idxLeft], normals[idxLeft], uvs[idxLeft], tangents[idxLeft], vertexColors[idxLeft], useMeshTangents, useVertexColors, useNormals);
var v0Left = AddTrianglePoint(triangle.pos[0], triangle.normal[0], triangle.uvs[0], triangle.tangents[0], triangle.colors[0], triangle.ids[0], triCache, cornerVertCache[idxLeft], vertices[idxLeft], normals[idxLeft], uvs[idxLeft], tangents[idxLeft], vertexColors[idxLeft], useMeshTangents, useVertexColors, useNormals);
var v2Left = AddTrianglePoint(triangle.pos[2], triangle.normal[2], triangle.uvs[2], triangle.tangents[2], triangle.colors[2], triangle.ids[2], triCache, cornerVertCache[idxLeft], vertices[idxLeft], normals[idxLeft], uvs[idxLeft], tangents[idxLeft], vertexColors[idxLeft], useMeshTangents, useVertexColors, useNormals);
// Triangle (v2, s1, s0)
triangles[idxLeft].Add(v2Left);
triangles[idxLeft].Add(s1Left);
triangles[idxLeft].Add(s0Left);
// Triangle (v2, v0, s1)
triangles[idxLeft].Add(v2Left);
triangles[idxLeft].Add(v0Left);
triangles[idxLeft].Add(s1Left);
// right side ... 1 triangle
var s0Right = AddIntersectionPoint(s0, triangle, triangle.ids[1], triangle.ids[2], cutVertCache[idxRight], vertices[idxRight], normals[idxRight], uvs[idxRight], tangents[idxRight], vertexColors[idxRight], useMeshTangents, useVertexColors, useNormals);
var s1Right = AddIntersectionPoint(s1, triangle, triangle.ids[1], triangle.ids[0], cutVertCache[idxRight], vertices[idxRight], normals[idxRight], uvs[idxRight], tangents[idxRight], vertexColors[idxRight], useMeshTangents, useVertexColors, useNormals);
var v1Right = AddTrianglePoint(triangle.pos[1], triangle.normal[1], triangle.uvs[1], triangle.tangents[1], triangle.colors[1], triangle.ids[1], triCache, cornerVertCache[idxRight], vertices[idxRight], normals[idxRight], uvs[idxRight], tangents[idxRight], vertexColors[idxRight], useMeshTangents, useVertexColors, useNormals);
// Triangle (s0, s1, v1)
triangles[idxRight].Add(s0Right);
triangles[idxRight].Add(s1Right);
triangles[idxRight].Add(v1Right);
// buffer intersection vertices for triangulation
if (triangulateHoles)
{
if (idxLeft == 0)
{
contour.AddTriangle(cutTri, s0Left, s1Left, s0, s1);
}
else
{
contour.AddTriangle(cutTri, s0Right, s1Right, s0, s1);
}
}
}
else
{
var a = plane.IntersectSegment(triangle.pos[0], triangle.pos[1], out t0, ref s0);
var b = plane.IntersectSegment(triangle.pos[0], triangle.pos[2], out t1, ref s1);
ExploderUtils.Assert(a && b, "!!!!!!!!!!!!!");
// right side ... 2 triangles
var s0Right = AddIntersectionPoint(s0, triangle, triangle.ids[0], triangle.ids[1], cutVertCache[idxRight], vertices[idxRight], normals[idxRight], uvs[idxRight], tangents[idxRight], vertexColors[idxRight], useMeshTangents, useVertexColors, useNormals);
var s1Right = AddIntersectionPoint(s1, triangle, triangle.ids[0], triangle.ids[2], cutVertCache[idxRight], vertices[idxRight], normals[idxRight], uvs[idxRight], tangents[idxRight], vertexColors[idxRight], useMeshTangents, useVertexColors, useNormals);
var v1Right = AddTrianglePoint(triangle.pos[1], triangle.normal[1], triangle.uvs[1], triangle.tangents[1], triangle.colors[1], triangle.ids[1], triCache, cornerVertCache[idxRight], vertices[idxRight], normals[idxRight], uvs[idxRight], tangents[idxRight], vertexColors[idxRight], useMeshTangents, useVertexColors, useNormals);
var v2Right = AddTrianglePoint(triangle.pos[2], triangle.normal[2], triangle.uvs[2], triangle.tangents[2], triangle.colors[2], triangle.ids[2], triCache, cornerVertCache[idxRight], vertices[idxRight], normals[idxRight], uvs[idxRight], tangents[idxRight], vertexColors[idxRight], useMeshTangents, useVertexColors, useNormals);
// Triangle (v2, s1, v1)
triangles[idxRight].Add(v2Right);
triangles[idxRight].Add(s1Right);
triangles[idxRight].Add(v1Right);
// Triangle (s1, s0, v1)
triangles[idxRight].Add(s1Right);
triangles[idxRight].Add(s0Right);
triangles[idxRight].Add(v1Right);
// left side ... 1 triangle
var s0Left = AddIntersectionPoint(s0, triangle, triangle.ids[0], triangle.ids[1], cutVertCache[idxLeft], vertices[idxLeft], normals[idxLeft], uvs[idxLeft], tangents[idxLeft], vertexColors[idxLeft], useMeshTangents, useVertexColors, useNormals);
var s1Left = AddIntersectionPoint(s1, triangle, triangle.ids[0], triangle.ids[2], cutVertCache[idxLeft], vertices[idxLeft], normals[idxLeft], uvs[idxLeft], tangents[idxLeft], vertexColors[idxLeft], useMeshTangents, useVertexColors, useNormals);
var v0Left = AddTrianglePoint(triangle.pos[0], triangle.normal[0], triangle.uvs[0], triangle.tangents[0], triangle.colors[0], triangle.ids[0], triCache, cornerVertCache[idxLeft], vertices[idxLeft], normals[idxLeft], uvs[idxLeft], tangents[idxLeft], vertexColors[idxLeft], useMeshTangents, useVertexColors, useNormals);
// Triangle (s1, v0, s0)
triangles[idxLeft].Add(s1Left);
triangles[idxLeft].Add(v0Left);
triangles[idxLeft].Add(s0Left);
// buffer intersection vertices for triangulation
if (triangulateHoles)
{
if (idxLeft == 0)
{
contour.AddTriangle(cutTri, s0Left, s1Left, s0, s1);
}
else
{
contour.AddTriangle(cutTri, s0Right, s1Right, s0, s1);
}
}
}
}
#if PROFILING
MeasureIt.End("CutCycleSecondPass");
#endif
if (triangulateHoles)
{
#if PROFILING
MeasureIt.Begin("FindContours");
#endif
contour.FindContours();
if (contour.contour.Count == 0 || contour.contour[0].Count < 3)
{
// triangulateHoles = false;
if (allowOpenMesh)
{
triangulateHoles = false;
}
else
{
stopWatch.Stop();
return(stopWatch.ElapsedMilliseconds);
}
}
#if PROFILING
MeasureIt.End("FindContours");
#endif
}
List <int>[] trianglesCut = null;
var centroid0 = Vector3.zero;
var centroid1 = Vector3.zero;
var min0 = Vector3.zero;
var max0 = Vector3.zero;
var min1 = Vector3.zero;
var max1 = Vector3.zero;
ExploderMesh.CalculateCentroid(vertices[0], ref centroid0, ref min0, ref max0);
ExploderMesh.CalculateCentroid(vertices[1], ref centroid1, ref min1, ref max1);
if (triangulateHoles)
{
#if PROFILING
MeasureIt.Begin("Triangulate");
#endif
trianglesCut = new List <int>[2]
{
new List <int>(contour.MidPointsCount),
new List <int>(contour.MidPointsCount)
};
Triangulate(contour.contour, plane, vertices, normals, uvs, tangents, vertexColors, trianglesCut, true, useMeshTangents, useVertexColors, useNormals);
#if PROFILING
MeasureIt.End("Triangulate");
#endif
}
if (vertices[0].Count > 3 && vertices[1].Count > 3)
{
#if PROFILING
MeasureIt.Begin("CutEndCopyBack");
#endif
mesh0 = new ExploderMesh();
mesh1 = new ExploderMesh();
var verticesArray0 = vertices[0].ToArray();
var verticesArray1 = vertices[1].ToArray();
mesh0.vertices = verticesArray0;
mesh0.uv = uvs[0].ToArray();
mesh1.vertices = verticesArray1;
mesh1.uv = uvs[1].ToArray();
if (useNormals)
{
mesh0.normals = normals[0].ToArray();
mesh1.normals = normals[1].ToArray();
}
if (useMeshTangents)
{
mesh0.tangents = tangents[0].ToArray();
mesh1.tangents = tangents[1].ToArray();
}
if (useVertexColors)
{
mesh0.colors32 = vertexColors[0].ToArray();
mesh1.colors32 = vertexColors[1].ToArray();
}
if (trianglesCut != null && trianglesCut[0].Count > 3)
{
triangles[0].AddRange(trianglesCut[0]);
triangles[1].AddRange(trianglesCut[1]);
}
mesh0.triangles = triangles[0].ToArray();
mesh1.triangles = triangles[1].ToArray();
mesh0.centroid = centroid0;
mesh0.min = min0;
mesh0.max = max0;
mesh1.centroid = centroid1;
mesh1.min = min1;
mesh1.max = max1;
#if PROFILING
MeasureIt.End("CutEndCopyBack");
#endif
meshes = new List <ExploderMesh> {
mesh0, mesh1
};
stopWatch.Stop();
return(stopWatch.ElapsedMilliseconds);
}
stopWatch.Stop();
// UnityEngine.Debug.Log("Empty cut! " + vertices[0].Count + " " + vertices[1].Count);
return(stopWatch.ElapsedMilliseconds);
}
private float Cut(
ExploderMesh mesh,
ExploderTransform meshTransform,
Plane plane,
bool triangulateHoles,
bool allowOpenMesh,
ref List <ExploderMesh> meshes)
{
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
int length1 = mesh.triangles.Length;
int length2 = mesh.vertices.Length;
int[] triangles1 = mesh.triangles;
Vector4[] tangents = mesh.tangents;
Color32[] colors32 = mesh.colors32;
Vector3[] vertices = mesh.vertices;
Vector3[] normals = mesh.normals;
Vector2[] uv = mesh.uv;
bool flag1 = tangents != null && tangents.Length > 0;
bool flag2 = colors32 != null && colors32.Length > 0;
bool useNormals = normals != null && normals.Length > 0;
this.AllocateBuffers(length1, length2, flag1, flag2);
for (int index1 = 0; index1 < length1; index1 += 3)
{
Vector3 n1 = vertices[triangles1[index1]];
Vector3 n2 = vertices[triangles1[index1 + 1]];
Vector3 n3 = vertices[triangles1[index1 + 2]];
bool sideFix1 = plane.GetSideFix(ref n1);
bool sideFix2 = plane.GetSideFix(ref n2);
bool sideFix3 = plane.GetSideFix(ref n3);
vertices[triangles1[index1]] = n1;
vertices[triangles1[index1 + 1]] = n2;
vertices[triangles1[index1 + 2]] = n3;
if (sideFix1 == sideFix2 && sideFix2 == sideFix3)
{
int index2 = !sideFix1 ? 1 : 0;
if (triangles1[index1] < this.triCache.Length)
{
;
}
if (this.triCache[triangles1[index1]] == 0)
{
this.triangles[index2].Add(this.triCounter[index2]);
this.vertices[index2].Add(vertices[triangles1[index1]]);
this.uvs[index2].Add(uv[triangles1[index1]]);
if (useNormals)
{
this.normals[index2].Add(normals[triangles1[index1]]);
}
if (flag1)
{
this.tangents[index2].Add(tangents[triangles1[index1]]);
}
if (flag2)
{
this.vertexColors[index2].Add(colors32[triangles1[index1]]);
}
ref Vector3 local = ref this.centroid[index2];
local = Vector3.op_Addition(local, vertices[triangles1[index1]]);
this.triCache[triangles1[index1]] = this.triCounter[index2] + 1;
++this.triCounter[index2];
}
else
{
this.triangles[index2].Add(this.triCache[triangles1[index1]] - 1);
}
if (this.triCache[triangles1[index1 + 1]] == 0)
{
this.triangles[index2].Add(this.triCounter[index2]);
this.vertices[index2].Add(vertices[triangles1[index1 + 1]]);
this.uvs[index2].Add(uv[triangles1[index1 + 1]]);
if (useNormals)
{
this.normals[index2].Add(normals[triangles1[index1 + 1]]);
}
if (flag1)
{
this.tangents[index2].Add(tangents[triangles1[index1 + 1]]);
}
if (flag2)
{
this.vertexColors[index2].Add(colors32[triangles1[index1 + 1]]);
}
ref Vector3 local = ref this.centroid[index2];
local = Vector3.op_Addition(local, vertices[triangles1[index1 + 1]]);
this.triCache[triangles1[index1 + 1]] = this.triCounter[index2] + 1;
++this.triCounter[index2];
}
/// <summary>
/// find and isolate independent (not connecting) parts in a mesh
/// </summary>
public static List <ExploderMesh> IsolateMeshIslands(ExploderMesh mesh)
{
var triangles = mesh.triangles;
var vertexCount = mesh.vertices.Length;
// cache mesh data
var trianglesNum = mesh.triangles.Length;
var tangents = mesh.tangents;
var colors = mesh.colors32;
var vertices = mesh.vertices;
var normals = mesh.normals;
var uvs = mesh.uv;
var useMeshTangents = tangents != null && tangents.Length > 0;
var useVertexColors = colors != null && colors.Length > 0;
var useNormals = normals != null && normals.Length > 0;
if (trianglesNum <= 3)
{
return(null);
}
ExploderUtils.Assert(trianglesNum > 3, "IsolateMeshIslands error: " + trianglesNum);
var lsHash = new LSHash(0.1f, vertexCount);
var vertHash = new int[trianglesNum];
for (int i = 0; i < trianglesNum; i++)
{
vertHash[i] = lsHash.Hash(vertices[triangles[i]]);
}
var islands = new List <HashSet <int> > {
new HashSet <int> {
vertHash[0], vertHash[1], vertHash[2]
}
};
var islandsIdx = new List <List <int> > {
new List <int>(trianglesNum)
{
0, 1, 2
}
};
var triVisited = new bool[trianglesNum];
triVisited[0] = true;
triVisited[1] = true;
triVisited[2] = true;
var currIsland = islands[0];
var currIslandIdx = islandsIdx[0];
var counter = 3;
var lastInvalidIdx = -1;
var loopCounter = 0;
while (true)
{
var foundIsland = false;
for (int j = 3; j < trianglesNum; j += 3)
{
if (triVisited[j])
{
continue;
}
if (currIsland.Contains(vertHash[j]) ||
currIsland.Contains(vertHash[j + 1]) ||
currIsland.Contains(vertHash[j + 2]))
{
currIsland.Add(vertHash[j]);
currIsland.Add(vertHash[j + 1]);
currIsland.Add(vertHash[j + 2]);
currIslandIdx.Add(j);
currIslandIdx.Add(j + 1);
currIslandIdx.Add(j + 2);
triVisited[j] = true;
triVisited[j + 1] = true;
triVisited[j + 2] = true;
counter += 3;
foundIsland = true;
}
else
{
lastInvalidIdx = j;
}
}
if (counter == trianglesNum)
{
break;
}
if (!foundIsland)
{
// create new island
currIsland = new HashSet <int> {
vertHash[lastInvalidIdx], vertHash[lastInvalidIdx + 1], vertHash[lastInvalidIdx + 2]
};
currIslandIdx = new List <int>(trianglesNum / 2)
{
lastInvalidIdx, lastInvalidIdx + 1, lastInvalidIdx + 2
};
islands.Add(currIsland);
islandsIdx.Add(currIslandIdx);
}
loopCounter++;
if (loopCounter > 100)
{
ExploderUtils.Log("10000 loop exceeded, islands: " + islands.Count);
break;
}
}
var islandNum = islands.Count;
ExploderUtils.Assert(islandNum >= 1, "No island found!");
// no more than one islands
if (islandNum == 1)
{
return(null);
}
var result = new List <ExploderMesh>(islands.Count);
foreach (var island in islandsIdx)
{
var cutterMesh = new ExploderMesh();
var triCount = island.Count;
var m = cutterMesh;
var tt = new List <int>(triCount);
var vs = new List <Vector3>(triCount);
var ns = new List <Vector3>(triCount);
var us = new List <Vector2>(triCount);
var cs = new List <Color32>(triCount);
var ts = new List <Vector4>(triCount);
var triCache = new Dictionary <int, int>(trianglesNum);
var centroid = Vector3.zero;
var centroidCounter = 0;
var triCounter = 0;
foreach (var i in island)
{
var tri = triangles[i];
var id = 0;
if (triCache.TryGetValue(tri, out id))
{
tt.Add(id);
continue;
}
tt.Add(triCounter);
triCache.Add(tri, triCounter);
triCounter++;
centroid += vertices[tri];
centroidCounter++;
vs.Add(vertices[tri]);
us.Add(uvs[tri]);
if (useNormals)
{
ns.Add(normals[tri]);
}
if (useVertexColors)
{
cs.Add(colors[tri]);
}
if (useMeshTangents)
{
ts.Add(tangents[tri]);
}
}
m.vertices = vs.ToArray();
m.uv = us.ToArray();
if (useNormals)
{
m.normals = ns.ToArray();
}
if (useVertexColors)
{
m.colors32 = cs.ToArray();
}
if (useMeshTangents)
{
m.tangents = ts.ToArray();
}
m.triangles = tt.ToArray();
cutterMesh.centroid = centroid / centroidCounter;
result.Add(cutterMesh);
}
return(result);
}
