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();
}
public void Simplify(Mesh inputMesh, Mesh outputMesh, float quality, Action completeAction)
{
SimplifierRunner.instance.EnqueueSimplification(Simplify(inputMesh, outputMesh, quality), completeAction);
}
