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Load NiTriShapes into Ogre meshes

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This commit is contained in:
Chris Robinson 2012-07-15 14:12:12 -07:00
parent 3029c221ef
commit 441a5c2da2
1 changed files with 172 additions and 1 deletions
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173
components/nifogre/ogre_nif_loader.cpp
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@ -490,11 +490,182 @@ class NIFMeshLoader : Ogre::ManualResourceLoader
}
// Convert NiTriShape to Ogre::SubMesh
void handleNiTriShape(Ogre::Mesh *mesh, Nif::NiTriShape *shape)
{
const Nif::NiTriShapeData *data = shape->data.getPtr();
const Nif::NiSkinInstance *skin = (shape->skin.empty() ? NULL : shape->skin.getPtr());
std::vector<Ogre::Vector3> srcVerts = data->vertices;
std::vector<Ogre::Vector3> srcNorms = data->normals;
if(skin != NULL)
{
#if 0
// Convert vertices and normals back to bone space
std::vector<Vector3> newVerts(srcVerts.size(), Vector3(0,0,0));
std::vector<Vector3> newNorms(srcNorms.size(), Vector3(0,0,0));
NiSkinDataRef data = skin->GetSkinData();
const std::vector<NiNodeRef> &bones = skin->GetBones();
for(size_t b = 0;b < bones.size();b++)
{
Matrix44 mat = data->GetBoneTransform(b) * bones[b]->GetWorldTransform();
const std::vector<SkinWeight> &weights = data->GetBoneWeights(b);
for(size_t i = 0;i < weights.size();i++)
{
size_t index = weights[i].index;
float weight = weights[i].weight;
newVerts.at(index) += (mat*srcVerts[index]) * weight;
if(newNorms.size() > index)
{
for(size_t j = 0;j < 3;j++)
{
newNorms[index][j] += mat[0][j]*srcNorms[index][0] * weight;
newNorms[index][j] += mat[1][j]*srcNorms[index][1] * weight;
newNorms[index][j] += mat[2][j]*srcNorms[index][2] * weight;
}
}
}
}
srcVerts = newVerts;
srcNorms = newNorms;
#endif
}
// Set the bounding box first
BoundsFinder bounds;
bounds.add(&srcVerts[0][0], srcVerts.size());
mesh->_setBounds(Ogre::AxisAlignedBox(bounds.minX(), bounds.minY(), bounds.minZ(),
bounds.maxX(), bounds.maxY(), bounds.maxZ()));
mesh->_setBoundingSphereRadius(bounds.getRadius());
// This function is just one long stream of Ogre-barf, but it works
// great.
Ogre::HardwareBufferManager *hwBufMgr = Ogre::HardwareBufferManager::getSingletonPtr();
Ogre::HardwareVertexBufferSharedPtr vbuf;
Ogre::HardwareIndexBufferSharedPtr ibuf;
Ogre::VertexBufferBinding *bind;
Ogre::VertexDeclaration *decl;
int nextBuf = 0;
Ogre::SubMesh *sub = mesh->createSubMesh(shape->name);
// Add vertices
sub->useSharedVertices = false;
sub->vertexData = new Ogre::VertexData();
sub->vertexData->vertexStart = 0;
sub->vertexData->vertexCount = srcVerts.size();
decl = sub->vertexData->vertexDeclaration;
bind = sub->vertexData->vertexBufferBinding;
if(srcVerts.size())
{
vbuf = hwBufMgr->createVertexBuffer(Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT3),
srcVerts.size(), Ogre::HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY,
true);
vbuf->writeData(0, vbuf->getSizeInBytes(), &srcVerts[0][0], true);
decl->addElement(nextBuf, 0, Ogre::VET_FLOAT3, Ogre::VES_POSITION);
bind->setBinding(nextBuf++, vbuf);
}
// Vertex normals
if(srcNorms.size())
{
vbuf = hwBufMgr->createVertexBuffer(Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT3),
srcNorms.size(), Ogre::HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY,
true);
vbuf->writeData(0, vbuf->getSizeInBytes(), &srcNorms[0][0], true);
decl->addElement(nextBuf, 0, Ogre::VET_FLOAT3, Ogre::VES_NORMAL);
bind->setBinding(nextBuf++, vbuf);
}
// Vertex colors
const std::vector<Ogre::Vector4> &colors = data->colors;
if(colors.size())
{
Ogre::RenderSystem* rs = Ogre::Root::getSingleton().getRenderSystem();
std::vector<Ogre::RGBA> colorsRGB(colors.size());
for(size_t i = 0;i < colorsRGB.size();i++)
{
Ogre::ColourValue clr(colors[i][0], colors[i][1], colors[i][2], colors[i][3]);
rs->convertColourValue(clr, &colorsRGB[i]);
}
vbuf = hwBufMgr->createVertexBuffer(Ogre::VertexElement::getTypeSize(Ogre::VET_COLOUR),
colorsRGB.size(), Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY,
true);
vbuf->writeData(0, vbuf->getSizeInBytes(), &colorsRGB[0], true);
decl->addElement(nextBuf, 0, Ogre::VET_COLOUR, Ogre::VES_DIFFUSE);
bind->setBinding(nextBuf++, vbuf);
}
// Texture UV coordinates
size_t numUVs = data->uvlist.size();
if(numUVs)
{
size_t elemSize = Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT2);
vbuf = hwBufMgr->createVertexBuffer(elemSize, srcVerts.size()*numUVs,
Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY, true);
for(size_t i = 0;i < numUVs;i++)
{
const std::vector<Ogre::Vector2> &uvlist = data->uvlist[i];
vbuf->writeData(i*srcVerts.size()*elemSize, elemSize*srcVerts.size(), &uvlist[0], true);
decl->addElement(nextBuf, i*srcVerts.size()*elemSize, Ogre::VET_FLOAT2,
Ogre::VES_TEXTURE_COORDINATES, i);
}
bind->setBinding(nextBuf++, vbuf);
}
// Triangle faces
const std::vector<short> &srcIdx = data->triangles;
if(srcIdx.size())
{
ibuf = hwBufMgr->createIndexBuffer(Ogre::HardwareIndexBuffer::IT_16BIT, srcIdx.size(),
Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);
ibuf->writeData(0, ibuf->getSizeInBytes(), &srcIdx[0], true);
sub->indexData->indexBuffer = ibuf;
sub->indexData->indexCount = srcIdx.size();
sub->indexData->indexStart = 0;
}
// Assign bone weights for this TriShape
#if 0
if(skin != NULL)
{
// Get the skeleton resource, so weights can be applied
Ogre::SkeletonManager *skelMgr = Ogre::SkeletonManager::getSingletonPtr();
Ogre::SkeletonPtr skel = skelMgr->getByName(mesh->getSkeletonName());
NiSkinDataRef data = skin->GetSkinData();
const std::vector<NiNodeRef> &bones = skin->GetBones();
for(size_t i = 0;i < bones.size();i++)
{
Ogre::VertexBoneAssignment boneInf;
boneInf.boneIndex = skel->getBone(bones[i]->GetName())->getHandle();
const std::vector<SkinWeight> &weights = data->GetBoneWeights(i);
for(size_t j = 0;j < weights.size();j++)
{
boneInf.vertexIndex = weights[j].index;
boneInf.weight = weights[j].weight;
sub->addBoneAssignment(boneInf);
}
}
}
#endif
if(mMaterialName.length() > 0)
sub->setMaterialName(mMaterialName);
}
bool findTriShape(Ogre::Mesh *mesh, Nif::Node *node)
{
if(node->recType == Nif::RC_NiTriShape && mShapeName == node->name)
{
warn("Not loading shape \""+mShapeName+"\" in "+mName);
handleNiTriShape(mesh, dynamic_cast<Nif::NiTriShape*>(node));
return true;
}