/// <summary>
/// Used for creating a hull from the given BXDAMesh.BXDASubmesh.
/// </summary>
/// <param name="subMesh"></param>
/// <param name="decompose"></param>
/// <returns></returns>
public static BXDAMesh.BXDASubMesh GetHull(BXDAMesh.BXDASubMesh subMesh)
{
List <int> indices = new List <int>();
foreach (BXDAMesh.BXDASurface surface in subMesh.surfaces)
{
indices.AddRange(surface.indicies);
}
IVHACD decomposer = new IVHACD();
ConvexLibraryWrapper.Parameters parameters = new ConvexLibraryWrapper.Parameters();
parameters.m_depth = 1;
parameters.m_concavity = 1;
if (!decomposer.Compute(Array.ConvertAll <double, float>(subMesh.verts, (d) => (float)d),
3, (uint)subMesh.verts.Length / 3, indices.ToArray(), 3, (uint)indices.Count / 3, parameters))
{
return(null);
}
ConvexLibraryWrapper.ConvexHull result = decomposer.GetConvexHull(0);
BXDAMesh.BXDASubMesh resultMesh = ExportSubMesh(Array.ConvertAll <double, float>(result.m_points, (d) => (float)d), result.m_nPoints,
Array.ConvertAll <int, uint>(result.m_triangles, (i) => (uint)i), result.m_nTriangles);
decomposer.Cancel();
decomposer.Clean();
decomposer.Release();
return(resultMesh);
}
/// <summary>
/// Computes a convex hull, or convex hull set for the given meshes.
/// </summary>
/// <param name="mesh">Mesh to compute for</param>
/// <param name="decompose">If a set of convex hulls is required</param>
/// <returns>The resulting list of convex hulls.</returns>
public static List <BXDAMesh.BXDASubMesh> GetHull(BXDAMesh bMesh, bool decompose = false, bool OCL = false)
{
int vertCount = 0;
int indexCount = 0;
foreach (BXDAMesh.BXDASubMesh mesh in bMesh.meshes)
{
vertCount += mesh.verts.Length;
foreach (BXDAMesh.BXDASurface surface in mesh.surfaces)
{
//Get total number of indicies in overall mesh.
indexCount += surface.indicies.Length;
}
}
if (vertCount <= 0)
{
throw new InvalidOperationException("There isn't any mesh to operate on!");
}
float[] copy = new float[vertCount];
uint[] index = new uint[indexCount];
vertCount = 0;
indexCount = 0;
int totalChecks = 0;
int onePercent = Math.Max(1, (copy.Length / 3) / 100);
SynthesisGUI.Instance.ExporterReset();
foreach (BXDAMesh.BXDASubMesh mesh in bMesh.meshes)
{
int[] subIndices = new int[mesh.verts.Length / 3];
int addedVerts = 0;
for (int i = 0; i < mesh.verts.Length; i += 3)
{
totalChecks++;
if (totalChecks % onePercent == 0)
{
//Console.Write("Cleaning " + totalChecks + "/" + (copy.Length / 3) + " " + ((int) (totalChecks * 3 / (float) copy.Length * 10000f) / 100f) + "%");
double totalProgress = ((double)totalChecks / ((double)copy.Length / 3.0)) * 100.0;
SynthesisGUI.Instance.ExporterSetSubText(String.Format("Clean {1} / {2}", Math.Round(totalProgress, 2), totalChecks, copy.Length / 3));
SynthesisGUI.Instance.ExporterSetProgress(totalProgress);
}
//Copy all the mesh vertices over, starting at the end of the last mesh copied.
for (int j = 0; j < (vertCount + addedVerts) * 3; j += 3)
{
if (Math.Abs(mesh.verts[i] - copy[j]) < EPSILON &&
Math.Abs(mesh.verts[i + 1] - copy[j + 1]) < EPSILON &&
Math.Abs(mesh.verts[i + 2] - copy[j + 2]) < EPSILON)
{
subIndices[i / 3] = (j / 3) + 1;// Add one so we can just use the pre-zeroed memory.
break;
}
}
if (subIndices[i / 3] == 0)
{
subIndices[i / 3] = vertCount + addedVerts + 1;
int offset = (vertCount + addedVerts) * 3;
addedVerts++;
copy[offset] = (float)mesh.verts[i];
copy[offset + 1] = (float)mesh.verts[i + 1];
copy[offset + 2] = (float)mesh.verts[i + 2];
}
else
{
// Which one is farther from the COM
int offset = (subIndices[i / 3] - 1) * 3;
float dx = (float)mesh.verts[i] - bMesh.physics.centerOfMass.x;
float dy = (float)mesh.verts[i + 1] - bMesh.physics.centerOfMass.y;
float dz = (float)mesh.verts[i + 2] - bMesh.physics.centerOfMass.z;
float dXC = copy[offset] - bMesh.physics.centerOfMass.x;
float dYC = copy[offset] - bMesh.physics.centerOfMass.y;
float dZC = copy[offset] - bMesh.physics.centerOfMass.z;
if ((dx * dx + dy * dy + dz * dz) > (dXC * dXC + dYC * dYC + dZC * dZC))
{
copy[offset] = (float)mesh.verts[i];
copy[offset + 1] = (float)mesh.verts[i + 1];
copy[offset + 2] = (float)mesh.verts[i + 2];
}
}
}
foreach (BXDAMesh.BXDASurface surface in mesh.surfaces)
{
int addedInds = 0;
for (int i = 0; i < surface.indicies.Length; i += 3)
{
if (subIndices[surface.indicies[i]] != subIndices[surface.indicies[i + 1]] &&
subIndices[surface.indicies[i + 1]] != subIndices[surface.indicies[i + 2]] &&
subIndices[surface.indicies[i + 2]] != subIndices[surface.indicies[i]])
{
index[indexCount + i] = (uint)subIndices[surface.indicies[i]] - 1;
index[indexCount + i + 1] = (uint)subIndices[surface.indicies[i + 1]] - 1;
index[indexCount + i + 2] = (uint)subIndices[surface.indicies[i + 2]] - 1;
addedInds += 3;
}
}
indexCount += addedInds;
}
vertCount += addedVerts;
}
SynthesisGUI.Instance.ExporterSetSubText("Calculating colliders");
IVHACD decomposer = new IVHACD();
ConvexLibraryWrapper.Parameters parameters = new ConvexLibraryWrapper.Parameters();
if (!decompose)
{
parameters.m_depth = 1;
parameters.m_concavity = 1;
}
if (OCL)
{
Console.WriteLine("Using OpenCL acceleration");
try
{
parameters.m_oclAcceleration = 1;
decomposer.OCLInit(parameters);
}
catch (DllNotFoundException e)
{
Console.WriteLine(e.Message);
OCL = false;
}
}
bool decomposeResult = false;
Thread t = new Thread(() =>
{
decomposeResult = decomposer.Compute(copy, 3, (uint)copy.Length / 3,
Array.ConvertAll <uint, int>(index, (uint ui) => (int)ui), 3, (uint)index.Length / 3,
parameters);
});
t.SetApartmentState(ApartmentState.MTA);
List <BXDAMesh.BXDASubMesh> subs = new List <BXDAMesh.BXDASubMesh>();
try
{
t.Start();
int dot = 0;
while (!t.Join(0))
{
SynthesisGUI.Instance.ExporterSetSubText("Calculating colliders" + new String('.', dot));
dot++;
if (dot > 5)
{
dot = 0;
}
System.Threading.Thread.Sleep(500);
}
Console.WriteLine();
if (!decomposeResult)
{
throw new Exception("Couldn't calculate convex hull!");
}
uint hullCount = decomposer.GetNConvexHulls();
Console.WriteLine("Convex Decomposition produced " + hullCount + " hulls.");
for (uint i = 0; i < hullCount; i++)
{
ConvexLibraryWrapper.ConvexHull result = decomposer.GetConvexHull(i);
subs.Add(ExportMeshInternal(Array.ConvertAll <double, float>(result.m_points, (double ui) => (float)ui), result.m_nPoints,
Array.ConvertAll <int, uint>(result.m_triangles, (int ui) => (uint)ui), result.m_nTriangles));
}
}
finally
{ }
if (OCL)
{
decomposer.OCLRelease(parameters);
}
decomposer.Cancel();
decomposer.Clean();
decomposer.Release();
return(subs);
}