void MilkshapePlugin::doExportMesh(msModel* pModel)
{
// Create singletons
Ogre::SkeletonManager skelMgr;
Ogre::DefaultHardwareBufferManager defHWBufMgr;
Ogre::LogManager& logMgr = Ogre::LogManager::getSingleton();
Ogre::MeshManager meshMgr;
//
// choose filename
//
OPENFILENAME ofn;
memset (&ofn, 0, sizeof (OPENFILENAME));
char szFile[MS_MAX_PATH];
char szFileTitle[MS_MAX_PATH];
char szDefExt[32] = "mesh";
char szFilter[128] = "OGRE .mesh Files (*.mesh)\0*.mesh\0All Files (*.*)\0*.*\0\0";
szFile[0] = '\0';
szFileTitle[0] = '\0';
ofn.lStructSize = sizeof (OPENFILENAME);
ofn.lpstrDefExt = szDefExt;
ofn.lpstrFilter = szFilter;
ofn.lpstrFile = szFile;
ofn.nMaxFile = MS_MAX_PATH;
ofn.lpstrFileTitle = szFileTitle;
ofn.nMaxFileTitle = MS_MAX_PATH;
ofn.Flags = OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT | OFN_PATHMUSTEXIST;
ofn.lpstrTitle = "Export to OGRE Mesh";
if (!::GetSaveFileName (&ofn))
return /*0*/;
logMgr.logMessage("Creating Mesh object...");
Ogre::MeshPtr ogreMesh = Ogre::MeshManager::getSingleton().create("export",
Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
logMgr.logMessage("Mesh object created.");
bool foundBoneAssignment = false;
// No shared geometry
int i;
int wh, numbones;
int intweight[3], intbones[3];
size_t j;
Ogre::Vector3 min, max, currpos;
Ogre::Real maxSquaredRadius;
bool first = true;
for (i = 0; i < msModel_GetMeshCount (pModel); i++)
{
msMesh *pMesh = msModel_GetMeshAt (pModel, i);
logMgr.logMessage("Creating SubMesh object...");
Ogre::SubMesh* ogreSubMesh = ogreMesh->createSubMesh();
logMgr.logMessage("SubMesh object created.");
// Set material
logMgr.logMessage("Getting SubMesh Material...");
int matIdx = msMesh_GetMaterialIndex(pMesh);
if (matIdx == -1)
{
// No material, use blank
ogreSubMesh->setMaterialName("BaseWhite");
logMgr.logMessage("No Material, using default 'BaseWhite'.");
}
else
{
msMaterial *pMat = msModel_GetMaterialAt(pModel, matIdx);
ogreSubMesh->setMaterialName(pMat->szName);
logMgr.logMessage("SubMesh Material Done.");
}
logMgr.logMessage("Setting up geometry...");
// Set up mesh geometry
ogreSubMesh->vertexData = new Ogre::VertexData();
ogreSubMesh->vertexData->vertexCount = msMesh_GetVertexCount (pMesh);
ogreSubMesh->vertexData->vertexStart = 0;
Ogre::VertexBufferBinding* bind = ogreSubMesh->vertexData->vertexBufferBinding;
Ogre::VertexDeclaration* decl = ogreSubMesh->vertexData->vertexDeclaration;
// Always 1 texture layer, 2D coords
#define POSITION_BINDING 0
#define NORMAL_BINDING 1
#define TEXCOORD_BINDING 2
decl->addElement(POSITION_BINDING, 0, Ogre::VET_FLOAT3, Ogre::VES_POSITION);
decl->addElement(NORMAL_BINDING, 0, Ogre::VET_FLOAT3, Ogre::VES_NORMAL);
decl->addElement(TEXCOORD_BINDING, 0, Ogre::VET_FLOAT2, Ogre::VES_TEXTURE_COORDINATES);
// Create buffers
Ogre::HardwareVertexBufferSharedPtr pbuf = Ogre::HardwareBufferManager::getSingleton().
createVertexBuffer(decl->getVertexSize(POSITION_BINDING), ogreSubMesh->vertexData->vertexCount,
Ogre::HardwareBuffer::HBU_DYNAMIC, false);
Ogre::HardwareVertexBufferSharedPtr nbuf = Ogre::HardwareBufferManager::getSingleton().
createVertexBuffer(decl->getVertexSize(NORMAL_BINDING), ogreSubMesh->vertexData->vertexCount,
Ogre::HardwareBuffer::HBU_DYNAMIC, false);
Ogre::HardwareVertexBufferSharedPtr tbuf = Ogre::HardwareBufferManager::getSingleton().
createVertexBuffer(decl->getVertexSize(TEXCOORD_BINDING), ogreSubMesh->vertexData->vertexCount,
Ogre::HardwareBuffer::HBU_DYNAMIC, false);
bind->setBinding(POSITION_BINDING, pbuf);
bind->setBinding(NORMAL_BINDING, nbuf);
bind->setBinding(TEXCOORD_BINDING, tbuf);
ogreSubMesh->useSharedVertices = false;
float* pPos = static_cast<float*>(
pbuf->lock(Ogre::HardwareBuffer::HBL_DISCARD));
logMgr.logMessage("Doing positions and texture coords...");
for (j = 0; j < ogreSubMesh->vertexData->vertexCount; ++j)
{
logMgr.logMessage("Doing vertex " + Ogre::StringConverter::toString(j));
msVertex *pVertex = msMesh_GetVertexAt (pMesh, (int)j);
msVertexEx *pVertexEx=msMesh_GetVertexExAt(pMesh, (int)j);
msVec3 Vertex;
msVertex_GetVertex (pVertex, Vertex);
*pPos++ = Vertex[0];
*pPos++ = Vertex[1];
*pPos++ = Vertex[2];
// Deal with bounds
currpos = Ogre::Vector3(Vertex[0], Vertex[1], Vertex[2]);
if (first)
{
min = max = currpos;
maxSquaredRadius = currpos.squaredLength();
first = false;
}
else
{
min.makeFloor(currpos);
max.makeCeil(currpos);
maxSquaredRadius = std::max(maxSquaredRadius, currpos.squaredLength());
}
int boneIdx = msVertex_GetBoneIndex(pVertex);
if (boneIdx != -1)
{
foundBoneAssignment = true;
numbones = 1;
intbones[0] = intbones[1] = intbones[2] = -1;
intweight[0] = intweight[1] = intweight[2] = 0;
for(wh = 0; wh < 3; ++wh)
{
intbones[wh] = msVertexEx_GetBoneIndices(pVertexEx, wh);
if(intbones[wh] == -1)
break;
++numbones;
intweight[wh] = msVertexEx_GetBoneWeights(pVertexEx, wh);
} // for(k)
Ogre::VertexBoneAssignment vertAssign;
vertAssign.boneIndex = boneIdx;
vertAssign.vertexIndex = (unsigned int)j;
if(numbones == 1)
{
vertAssign.weight = 1.0;
} // single assignment
else
{
vertAssign.weight=(Ogre::Real)intweight[0]/100.0;
}
ogreSubMesh->addBoneAssignment(vertAssign);
if(numbones > 1)
{
// this somewhat contorted logic is because the first weight [0] matches to the bone assignment
// located with pVertex. The next two weights [1][2] match up to the first two bones found
// with pVertexEx [0][1]. The weight for the fourth bone, if present, is the unassigned weight
for(wh = 0; wh < 3; wh++)
{
boneIdx = intbones[wh];
if(boneIdx == -1)
break;
vertAssign.boneIndex = boneIdx;
vertAssign.vertexIndex = (unsigned int)j;
if(wh == 2)
{
// fourth weight is 1.0-(sumoffirstthreeweights)
vertAssign.weight = 1.0-(((Ogre::Real)intweight[0]/100.0)+
((Ogre::Real)intweight[1]/100.0)+((Ogre::Real)intweight[2]/100.0));
}
else
{
vertAssign.weight=(Ogre::Real)intweight[wh+1];
}
ogreSubMesh->addBoneAssignment(vertAssign);
} // for(k)
} // if(numbones)
}
}
pbuf->unlock();
float* pTex = static_cast<float*>(
tbuf->lock(Ogre::HardwareBuffer::HBL_DISCARD));
logMgr.logMessage("Doing uvs, normals and indexes (v2)...");
// Aargh, Milkshape uses stupid separate normal indexes for the same vertex like 3DS
// Normals aren't described per vertex but per triangle vertex index
// Pain in the arse, we have to do vertex duplication again if normals differ at a vertex (non smooth)
// WHY don't people realise this format is a pain for passing to 3D APIs in vertex buffers?
float* pNorm = static_cast<float*>(
nbuf->lock(Ogre::HardwareBuffer::HBL_DISCARD));
ogreSubMesh->indexData->indexCount = msMesh_GetTriangleCount (pMesh) * 3;
// Always use 16-bit buffers, Milkshape can't handle more anyway
Ogre::HardwareIndexBufferSharedPtr ibuf = Ogre::HardwareBufferManager::getSingleton().
createIndexBuffer(Ogre::HardwareIndexBuffer::IT_16BIT,
ogreSubMesh->indexData->indexCount, Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);
ogreSubMesh->indexData->indexBuffer = ibuf;
unsigned short *pIdx = static_cast<unsigned short*>(
ibuf->lock(Ogre::HardwareBuffer::HBL_DISCARD));
for (j = 0; j < ogreSubMesh->indexData->indexCount; j+=3)
{
msTriangle *pTriangle = msMesh_GetTriangleAt (pMesh, (int)j/3);
msTriangleEx *pTriangleEx=msMesh_GetTriangleExAt(pMesh, (int)j/3);
word nIndices[3];
msTriangle_GetVertexIndices (pTriangle, nIndices);
msVec3 Normal;
msVec2 uv;
int k, vertIdx;
for (k = 0; k < 3; ++k)
{
vertIdx = nIndices[k];
// Face index
pIdx[j+k] = vertIdx;
// Vertex normals
// For the moment, ignore any discrepancies per vertex
msTriangleEx_GetNormal(pTriangleEx, k, &Normal[0]);
msTriangleEx_GetTexCoord(pTriangleEx, k, &uv[0]);
pTex[(vertIdx*2)]=uv[0];
pTex[(vertIdx*2)+1]=uv[1];
pNorm[(vertIdx*3)] = Normal[0];
pNorm[(vertIdx*3)+1] = Normal[1];
pNorm[(vertIdx*3)+2] = Normal[2];
}
} // Faces
nbuf->unlock();
ibuf->unlock();
tbuf->unlock();
// Now use Ogre's ability to reorganise the vertex buffers the best way
Ogre::VertexDeclaration* newDecl =
ogreSubMesh->vertexData->vertexDeclaration->getAutoOrganisedDeclaration(
foundBoneAssignment, false);
Ogre::BufferUsageList bufferUsages;
for (size_t u = 0; u <= newDecl->getMaxSource(); ++u)
bufferUsages.push_back(Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);
ogreSubMesh->vertexData->reorganiseBuffers(newDecl, bufferUsages);
logMgr.logMessage("Geometry done.");
} // SubMesh
// Set bounds
ogreMesh->_setBoundingSphereRadius(Ogre::Math::Sqrt(maxSquaredRadius));
ogreMesh->_setBounds(Ogre::AxisAlignedBox(min, max), false);
// Keep hold of a Skeleton pointer for deletion later
// Mesh uses Skeleton pointer for skeleton name
Ogre::SkeletonPtr pSkel;
if (exportSkeleton && foundBoneAssignment)
{
// export skeleton, also update mesh to point to it
pSkel = doExportSkeleton(pModel, ogreMesh);
}
else if (!exportSkeleton && foundBoneAssignment)
{
// We've found bone assignments, but skeleton is not to be exported
// Prompt the user to find the skeleton
if (!locateSkeleton(ogreMesh))
return;
}
// Export
logMgr.logMessage("Creating MeshSerializer..");
Ogre::MeshSerializer serializer;
logMgr.logMessage("MeshSerializer created.");
// Generate LODs if required
if (generateLods)
{
// Build LOD depth list
Ogre::Mesh::LodDistanceList distList;
float depth = 0;
for (unsigned short depthidx = 0; depthidx < numLods; ++depthidx)
{
depth += lodDepthIncrement;
distList.push_back(depth);
}
ogreMesh->generateLodLevels(distList, lodReductionMethod, lodReductionAmount);
}
if (generateEdgeLists)
{
ogreMesh->buildEdgeList();
}
if (generateTangents)
{
unsigned short src, dest;
ogreMesh->suggestTangentVectorBuildParams(tangentSemantic, src, dest);
ogreMesh->buildTangentVectors(tangentSemantic, src, dest, tangentsSplitMirrored, tangentsSplitRotated, tangentsUseParity);
}
// Export
Ogre::String msg;
msg = "Exporting mesh data to file '" + Ogre::String(szFile) + "'";
logMgr.logMessage(msg);
serializer.exportMesh(ogreMesh.getPointer(), szFile);
logMgr.logMessage("Export successful");
Ogre::MeshManager::getSingleton().remove(ogreMesh->getHandle());
if (!pSkel.isNull())
Ogre::SkeletonManager::getSingleton().remove(pSkel->getHandle());
if (exportMaterials && msModel_GetMaterialCount(pModel) > 0)
{
doExportMaterials(pModel);
}
}
void MsAppMesh::getSkinData()
{
// only generate the skin data once
if (mSkinDataFetched)
return;
mSkinDataFetched = true;
// skinned meshes are attached to more than 1 bone
if (mMsNode->mBoneIndices.size() <= 1)
return;
// need to generate an array of bones that animate this mesh
// Milkshape supports up to 4 bone weights per vertex - all other bones
// are set to weight 0
msModel *model = mMsNode->getModel();
//-----------------------------------------------------------------------
// add all bones attached to this mesh
S32 numBones = mMsNode->mBoneIndices.size();
for (int i = 0; i < numBones;i++)
{
S32 boneIndex = mMsNode->mBoneIndices[i];
assert(boneIndex >= 0 && "Invalid bone index");
MilkshapeNode *node = new MilkshapeBone(boneIndex);
mBones.push_back(new MsAppNode(node, true));
AppConfig::PrintDump(PDPass2,avar("Adding skin object from skin \"%s\" to bone \"%s\" (%i).\r\n",mMsNode->getName(),mBones[i]->getName(),i));
}
//-----------------------------------------------------------------------
// reset all weights to zero
S32 numPoints = msMesh_GetVertexCount(mMsNode->getMsMesh());
mWeights.resize(numBones);
for (int i = 0; i < (int)mWeights.size(); i++)
{
mWeights[i] = new std::vector<F32>;
mWeights[i]->resize(numPoints);
for (int j=0; j<numPoints; j++)
(*mWeights[i])[j] = 0.0f;
}
// set weights for bones that affect vertices in this mesh
for (int j = 0; j < numPoints; j++)
{
S32 indices[MS_BONES_PER_VERTEX_EX];
F32 weights[MS_BONES_PER_VERTEX_EX];
bool attached = false;
// get the bone indices/weights of this vertex - they are stored a bit
// strangely to keep the milkshape file format backwards compatible:
// bone[0] = msVertex.nBoneIndex, weight[0] = msVertexEx.nBoneWeights[0]
// bone[1] = msVertexEx.nBoneIndex[0], weight[1] = msVertexEx.nBoneWeights[1]
// bone[2] = msVertexEx.nBoneIndex[1], weight[2] = msVertexEx.nBoneWeights[2]
// bone[3] = msVertexEx.nBoneIndex[2], weight[3] = 1 - (sum_of_other_weights)
for (int k = 0; k < MS_BONES_PER_VERTEX_EX; k++)
{
msVertexEx *vtx = msMesh_GetVertexExAt(mMsNode->getMsMesh(), j);
// get the bone index
if (k == 0)
{
msVertex *v = msMesh_GetVertexAt(mMsNode->getMsMesh(), j);
indices[k] = msVertex_GetBoneIndex(v);
}
else
{
indices[k] = msVertexEx_GetBoneIndices(vtx, k - 1);
}
// get the bone weight
if (indices[k] >= 0)
{
attached = true;
if (k != (MS_BONES_PER_VERTEX_EX-1))
{
weights[k] = (F32)msVertexEx_GetBoneWeights(vtx, k) / 100.f;
}
else
{
weights[k] = 1.0f - (weights[0] + weights[1] + weights[2]);
}
}
else
weights[k] = 0.0f;
}
// Force verts that are attached to a single bone to have 100% weight
if (attached && (indices[1] == -1) && (weights[0] == 0.0f))
{
weights[0] = 1.0f;
}
// if the vertex is not attached to any bones, attach it to the root bone
if (!attached)
{
S32 boneIndex = mMsNode->getRootBoneIndex();
addBoneWeight(j, boneIndex, 1.0f);
}
else
{
// add weights for each bone
for (int k = 0; k < MS_BONES_PER_VERTEX_EX; k++)
{
if (indices[k] < 0)
continue;
addBoneWeight(j, indices[k], weights[k]);
}
}
}
}