public void Simplify(Mesh inputMesh, Mesh outputMesh, float quality)
{
Vector3[] vertices = inputMesh.vertices;
Vector2[] uv = inputMesh.uv;
Vector2[] uv2 = inputMesh.uv2;
Color[] colors = inputMesh.colors;
Vector3[] normals = inputMesh.normals;
Vector4[] tangents = inputMesh.tangents;
var usedVertices = new Dictionary <int, Vector3>();
var submeshTriangles = new Dictionary <int, List <int> >();
for (int i = 0; i < inputMesh.subMeshCount; i++)
{
var triangles = new List <int>(inputMesh.GetTriangles(i));
var targetCount = Mathf.FloorToInt(triangles.Count * quality);
targetCount = Mathf.Max(0, targetCount - targetCount % 3);
var random = new System.Random();
while (triangles.Count > targetCount)
{
var randomTriangle = Mathf.CeilToInt((float)random.NextDouble() * (triangles.Count - 1));
randomTriangle -= randomTriangle % 3;
triangles.RemoveRange(randomTriangle, 3);
}
for (int t = 0; t < triangles.Count; t++)
{
var index = triangles[t];
usedVertices[index] = vertices[index];
}
submeshTriangles[i] = triangles;
}
var trimmedVertices = new List <Vector3>();
var trimmedUVs = new List <Vector2>();
var trimmedUV2s = new List <Vector2>();
var trimmedColors = new List <Color>();
var trimmedNormals = new List <Vector3>();
var trimmedTangents = new List <Vector4>();
var vertexRemap = new Dictionary <int, int>();
for (int i = 0; i < vertices.Length; i++)
{
Vector3 vertex;
if (usedVertices.TryGetValue(i, out vertex))
{
vertexRemap[i] = trimmedVertices.Count;
trimmedVertices.Add(vertex);
if (uv.Length > 0)
{
trimmedUVs.Add(uv[i]);
}
if (uv2.Length > 0)
{
trimmedUV2s.Add(uv2[i]);
}
if (colors.Length > 0)
{
trimmedColors.Add(colors[i]);
}
if (normals.Length > 0)
{
trimmedNormals.Add(normals[i]);
}
if (tangents.Length > 0)
{
trimmedTangents.Add(tangents[i]);
}
}
}
outputMesh.vertices = trimmedVertices.ToArray();
for (int i = 0; i < inputMesh.subMeshCount; i++)
{
var triangles = submeshTriangles[i];
for (int t = 0; t < triangles.Count; t++)
{
triangles[t] = vertexRemap[triangles[t]];
}
outputMesh.SetTriangles(triangles.ToArray(), i);
}
outputMesh.uv = trimmedUVs.ToArray();
outputMesh.uv2 = trimmedUV2s.ToArray();
outputMesh.colors = trimmedColors.ToArray();
outputMesh.normals = trimmedNormals.ToArray();
outputMesh.tangents = trimmedTangents.ToArray();
outputMesh.RecalculateBounds();
outputMesh.RecalculateNormals();
outputMesh.RecalculateTangents();
}
static void FromMeshDecimatorMesh(DMesh mesh, bool recalculateNormals, ref WMesh destMesh)
{
if (recalculateNormals)
{
// If we recalculate the normals, we also recalculate the tangents
mesh.RecalculateNormals();
mesh.RecalculateTangents();
}
int subMeshCount = mesh.SubMeshCount;
var newNormals = FromVector3(mesh.Normals);
var newTangents = FromVector4(mesh.Tangents);
var newUV1 = FromVector2(mesh.UV1);
var newUV2 = FromVector2(mesh.UV2);
var newUV3 = FromVector2(mesh.UV3);
var newUV4 = FromVector2(mesh.UV4);
var newColors = FromColor(mesh.Colors);
//var newBoneWeights = FromSimplifyBoneWeights(mesh.BoneWeights);
//if (bindposes != null) newMesh.bindposes = bindposes;
destMesh.subMeshCount = subMeshCount;
destMesh.vertices = FromVector3d(mesh.Vertices);
if (newNormals != null)
{
destMesh.normals = newNormals;
}
if (newTangents != null)
{
destMesh.tangents = newTangents;
}
if (newUV1 != null)
{
destMesh.uv = newUV1;
}
if (newUV2 != null)
{
destMesh.uv2 = newUV2;
}
if (newUV3 != null)
{
destMesh.uv3 = newUV3;
}
if (newUV4 != null)
{
destMesh.uv4 = newUV4;
}
if (newColors != null)
{
destMesh.colors = newColors;
}
//if (newBoneWeights != null)
// newMesh.boneWeights = newBoneWeights;
for (int i = 0; i < subMeshCount; i++)
{
var subMeshIndices = mesh.GetIndices(i);
destMesh.SetTriangles(subMeshIndices, i);
}
destMesh.RecalculateBounds();
}