public async void SimplifyObj(string sourcePath, string destPath, float quality)
{
simplifyTask = new Task(() =>
{
quality = MathHelper.Clamp01(quality);
ObjMesh sourceObjMesh = new ObjMesh();
sourceObjMesh.ReadFile(sourcePath);
var sourceVertices = sourceObjMesh.Vertices;
var sourceNormals = sourceObjMesh.Normals;
var sourceTexCoords2D = sourceObjMesh.TexCoords2D;
var sourceTexCoords3D = sourceObjMesh.TexCoords3D;
var sourceSubMeshIndices = sourceObjMesh.SubMeshIndices;
var sourceMesh = new MeshDecimator.Mesh(sourceVertices, sourceSubMeshIndices);
sourceMesh.Normals = sourceNormals;
if (sourceTexCoords2D != null)
{
sourceMesh.SetUVs(0, sourceTexCoords2D);
}
else if (sourceTexCoords3D != null)
{
sourceMesh.SetUVs(0, sourceTexCoords3D);
}
int currentTriangleCount = 0;
for (int i = 0; i < sourceSubMeshIndices.Length; i++)
{
currentTriangleCount += (sourceSubMeshIndices[i].Length / 3);
}
int targetTriangleCount = (int)Math.Ceiling(currentTriangleCount * quality);
string info_1 = string.Format("Input: {0} vertices, {1} triangles (target {2}) \n",
sourceVertices.Length, currentTriangleCount, targetTriangleCount);
// Console.WriteLine(info_1);
simplifyInfo.Invoke(info_1);
var stopwatch = new System.Diagnostics.Stopwatch();
stopwatch.Reset();
stopwatch.Start();
var algorithm = MeshDecimation.CreateAlgorithm(Algorithm.Default);
algorithm.Verbose = true;
MeshDecimator.Mesh destMesh = MeshDecimation.DecimateMesh(algorithm, sourceMesh, targetTriangleCount);
stopwatch.Stop();
var destVertices = destMesh.Vertices;
var destNormals = destMesh.Normals;
var destIndices = destMesh.GetSubMeshIndices();
ObjMesh destObjMesh = new ObjMesh(destVertices, destIndices);
destObjMesh.Normals = destNormals;
destObjMesh.MaterialLibraries = sourceObjMesh.MaterialLibraries;
destObjMesh.SubMeshMaterials = sourceObjMesh.SubMeshMaterials;
if (sourceTexCoords2D != null)
{
var destUVs = destMesh.GetUVs2D(0);
destObjMesh.TexCoords2D = destUVs;
}
else if (sourceTexCoords3D != null)
{
var destUVs = destMesh.GetUVs3D(0);
destObjMesh.TexCoords3D = destUVs;
}
destObjMesh.WriteFile(destPath);
int outputTriangleCount = 0;
for (int i = 0; i < destIndices.Length; i++)
{
outputTriangleCount += (destIndices[i].Length / 3);
}
float reduction = (float)outputTriangleCount / (float)currentTriangleCount;
float timeTaken = (float)stopwatch.Elapsed.TotalSeconds;
string info_2 = string.Format("Output: {0} vertices, {1} triangles ({2} reduction; {3:0.0000} sec) \n",
destVertices.Length, outputTriangleCount, reduction, timeTaken);
// Console.WriteLine(info_2);
simplifyInfo.Invoke(info_2);
simplifyInfo.Invoke("finish");
DisposeTask();
});
simplifyTask.Start();
}
