public void Dispose()
{
int i;
for (i = 0; i < mChulls.Count; i++)
{
CHull cr = mChulls[i];
cr.Dispose();
}
}
public CHull canMerge(CHull a, CHull b)
{
if (!a.overlap(b)) // if their AABB's (with a little slop) don't overlap, then return.
{
return(null);
}
CHull ret = null;
// ok..we are going to combine both meshes into a single mesh
// and then we are going to compute the concavity...
VertexPool vc = new VertexPool();
List <int> indices = new List <int>();
getMesh(a.mResult, vc, indices);
getMesh(b.mResult, vc, indices);
int vcount = vc.GetSize();
List <float3> vertices = vc.GetVertices();
int tcount = indices.Count / 3;
//don't do anything if hull is empty
if (tcount == 0)
{
vc.Clear();
return(null);
}
HullResult hresult = new HullResult();
HullDesc desc = new HullDesc();
desc.SetHullFlag(HullFlag.QF_TRIANGLES);
desc.Vertices = vertices;
HullError hret = HullUtils.CreateConvexHull(desc, ref hresult);
if (hret == HullError.QE_OK)
{
float combineVolume = Concavity.computeMeshVolume(hresult.OutputVertices, hresult.Indices);
float sumVolume = a.mVolume + b.mVolume;
float percent = (sumVolume * 100) / combineVolume;
if (percent >= (100.0f - MERGE_PERCENT))
{
ConvexResult cr = new ConvexResult(hresult.OutputVertices, hresult.Indices);
ret = new CHull(cr);
}
}
vc.Clear();
return(ret);
}
public bool overlap(CHull h)
{
return overlapAABB(mMin, mMax, h.mMin, h.mMax);
}
public void ConvexDecompResult(ConvexResult result)
{
CHull ch = new CHull(result);
mChulls.Add(ch);
}
public CHull canMerge(CHull a, CHull b)
{
if (!a.overlap(b)) // if their AABB's (with a little slop) don't overlap, then return.
return null;
CHull ret = null;
// ok..we are going to combine both meshes into a single mesh
// and then we are going to compute the concavity...
VertexPool vc = new VertexPool();
List<int> indices = new List<int>();
getMesh(a.mResult, vc, indices);
getMesh(b.mResult, vc, indices);
int vcount = vc.GetSize();
List<float3> vertices = vc.GetVertices();
int tcount = indices.Count/3;
//don't do anything if hull is empty
if (tcount == 0)
{
vc.Clear();
return null;
}
HullResult hresult = new HullResult();
HullDesc desc = new HullDesc();
desc.SetHullFlag(HullFlag.QF_TRIANGLES);
desc.Vertices = vertices;
HullError hret = HullUtils.CreateConvexHull(desc, ref hresult);
if (hret == HullError.QE_OK)
{
float combineVolume = Concavity.computeMeshVolume(hresult.OutputVertices, hresult.Indices);
float sumVolume = a.mVolume + b.mVolume;
float percent = (sumVolume*100)/combineVolume;
if (percent >= (100.0f - MERGE_PERCENT))
{
ConvexResult cr = new ConvexResult(hresult.OutputVertices, hresult.Indices);
ret = new CHull(cr);
}
}
vc.Clear();
return ret;
}
public bool overlap(CHull h)
{
return(overlapAABB(mMin, mMax, h.mMin, h.mMax));
}
public void ConvexDecompResult(ConvexResult result)
{
CHull ch = new CHull(result);
mChulls.Add(ch);
}
public int process(DecompDesc desc)
{
int ret = 0;
MAXDEPTH = (int)desc.mDepth;
CONCAVE_PERCENT = desc.mCpercent;
MERGE_PERCENT = desc.mPpercent;
ConvexDecomposition.calcConvexDecomposition(desc.mVertices, desc.mIndices, ConvexDecompResult, 0f, 0,
MAXDEPTH, CONCAVE_PERCENT, MERGE_PERCENT);
while (combineHulls()) // keep combinging hulls until I can't combine any more...
{
;
}
int i;
for (i = 0; i < mChulls.Count; i++)
{
CHull cr = mChulls[i];
// before we hand it back to the application, we need to regenerate the hull based on the
// limits given by the user.
ConvexResult c = cr.mResult; // the high resolution hull...
HullResult result = new HullResult();
HullDesc hdesc = new HullDesc();
hdesc.SetHullFlag(HullFlag.QF_TRIANGLES);
hdesc.Vertices = c.HullVertices;
hdesc.MaxVertices = desc.mMaxVertices; // maximum number of vertices allowed in the output
if (desc.mSkinWidth != 0f)
{
hdesc.SkinWidth = desc.mSkinWidth;
hdesc.SetHullFlag(HullFlag.QF_SKIN_WIDTH); // do skin width computation.
}
HullError ret2 = HullUtils.CreateConvexHull(hdesc, ref result);
if (ret2 == HullError.QE_OK)
{
ConvexResult r = new ConvexResult(result.OutputVertices, result.Indices)
{
mHullVolume =
Concavity.computeMeshVolume(result.OutputVertices, result.Indices)
};
// the volume of the hull.
// compute the best fit OBB
//computeBestFitOBB(result.mNumOutputVertices, result.mOutputVertices, sizeof(float) * 3, r.mOBBSides, r.mOBBTransform);
//r.mOBBVolume = r.mOBBSides[0] * r.mOBBSides[1] * r.mOBBSides[2]; // compute the OBB volume.
//fm_getTranslation(r.mOBBTransform, r.mOBBCenter); // get the translation component of the 4x4 matrix.
//fm_matrixToQuat(r.mOBBTransform, r.mOBBOrientation); // extract the orientation as a quaternion.
//r.mSphereRadius = computeBoundingSphere(result.mNumOutputVertices, result.mOutputVertices, r.mSphereCenter);
//r.mSphereVolume = fm_sphereVolume(r.mSphereRadius);
mCallback(r);
}
result = null;
cr.Dispose();
}
ret = mChulls.Count;
mChulls.Clear();
return(ret);
}
public bool combineHulls()
{
bool combine = false;
sortChulls(mChulls); // sort the convex hulls, largest volume to least...
List <CHull> output = new List <CHull>(); // the output hulls...
int i;
for (i = 0; i < mChulls.Count && !combine; ++i)
{
CHull cr = mChulls[i];
int j;
for (j = 0; j < mChulls.Count; j++)
{
CHull match = mChulls[j];
if (cr != match) // don't try to merge a hull with itself, that be stoopid
{
CHull merge = canMerge(cr, match); // if we can merge these two....
if (merge != null)
{
output.Add(merge);
++i;
while (i != mChulls.Count)
{
CHull cr2 = mChulls[i];
if (cr2 != match)
{
output.Add(cr2);
}
i++;
}
cr.Dispose();
match.Dispose();
combine = true;
break;
}
}
}
if (combine)
{
break;
}
else
{
output.Add(cr);
}
}
if (combine)
{
mChulls.Clear();
mChulls = output;
output.Clear();
}
return(combine);
}