/******************************************************************************
* dsLightSphere vertex and index initialization
******************************************************************************/
std::vector< vec3 > subdivide( std::vector< vec3 >& inVerts ) {
std::vector< vec3 > newVerts( inVerts.size() * 4 );
for (unsigned i = 0, j = 0; i < inVerts.size(); i+=3) {
vec3 a = normalize(( inVerts[i+0] + inVerts[i+1] ) * 0.5f);
vec3 b = normalize(( inVerts[i+1] + inVerts[i+2] ) * 0.5f);
vec3 c = normalize(( inVerts[i+2] + inVerts[i+0] ) * 0.5f);
newVerts[ j++ ] = normalize(inVerts[i+0]);
newVerts[ j++ ] = a;
newVerts[ j++ ] = c;
newVerts[ j++ ] = normalize(inVerts[i+1]);
newVerts[ j++ ] = b;
newVerts[ j++ ] = a;
newVerts[ j++ ] = normalize(inVerts[i+2]);
newVerts[ j++ ] = c;
newVerts[ j++ ] = b;
newVerts[ j++ ] = a;
newVerts[ j++ ] = b;
newVerts[ j++ ] = c;
}
return newVerts;
}
void TriMesh::RemoveUnusedVerts()
{
vector<int> vertexMap(verts.size(),-1);
vector<Vector3> newVerts(verts.size());
int numVerts=0;
for(size_t i=0;i<tris.size();i++) {
for(int k=0;k<3;k++) {
int v=tris[i][k];
if(vertexMap[v]==-1) {
vertexMap[v]=numVerts;
newVerts[numVerts]=verts[v];
numVerts++;
}
tris[i][k]=vertexMap[v];
}
}
newVerts.resize(numVerts);
swap(verts,newVerts);
}
void TriSoup::RemapData( const std::vector<int>& faceOrder )
{
ASSERT(faceOrder.size() == m_faces.size());
// use the new cache aware index buffer to reorder the vertex buffer data. Create a map
// from idxOld -> idxNew.
const int numVerts = NumVertices();
std::vector<int> vertRemap(numVerts, -1);
std::vector<Vertex> newVerts(NumVertices());
std::vector<Face> newFaces(NumFaces());
int curVert = 0;
for(int i = 0, c = faceOrder.size(); i < c; ++i)
{
// put the face in the correct order
ASSERT(faceOrder[i] < NumFaces());
newFaces[i] = m_faces[faceOrder[i]];
// remap the vertices in the current face
for(int j = 0; j < 3; ++j)
{
int v0 = newFaces[i].m_vertices[j];
if(vertRemap[v0] == -1)
{
newVerts[curVert] = m_vertices[v0];
vertRemap[v0] = curVert;
++curVert;
}
newFaces[i].m_vertices[j] = vertRemap[v0];
}
}
ASSERT(curVert == (int)vertRemap.size());
m_faces.swap(newFaces);
m_vertices.swap(newVerts);
}
void NIFMeshLoader::createSubMesh(Ogre::Mesh *mesh, const 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;
Ogre::HardwareBuffer::Usage vertUsage = Ogre::HardwareBuffer::HBU_STATIC;
bool vertShadowBuffer = false;
bool geomMorpherController = false;
if(!shape->controller.empty())
{
Nif::ControllerPtr ctrl = shape->controller;
do {
if(ctrl->recType == Nif::RC_NiGeomMorpherController)
{
vertUsage = Ogre::HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY;
vertShadowBuffer = true;
geomMorpherController = true;
break;
}
} while(!(ctrl=ctrl->next).empty());
}
if(skin != NULL)
{
vertUsage = Ogre::HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY;
vertShadowBuffer = true;
// Only set a skeleton when skinning. Unskinned meshes with a skeleton will be
// explicitly attached later.
mesh->setSkeletonName(mName);
// Convert vertices and normals to bone space from bind position. It would be
// better to transform the bones into bind position, but there doesn't seem to
// be a reliable way to do that.
std::vector<Ogre::Vector3> newVerts(srcVerts.size(), Ogre::Vector3(0.0f));
std::vector<Ogre::Vector3> newNorms(srcNorms.size(), Ogre::Vector3(0.0f));
const Nif::NiSkinData *data = skin->data.getPtr();
const Nif::NodeList &bones = skin->bones;
for(size_t b = 0;b < bones.length();b++)
{
Ogre::Matrix4 mat;
mat.makeTransform(data->bones[b].trafo.trans, Ogre::Vector3(data->bones[b].trafo.scale),
Ogre::Quaternion(data->bones[b].trafo.rotation));
mat = bones[b]->getWorldTransform() * mat;
const std::vector<Nif::NiSkinData::VertWeight> &weights = data->bones[b].weights;
for(size_t i = 0;i < weights.size();i++)
{
size_t index = weights[i].vertex;
float weight = weights[i].weight;
newVerts.at(index) += (mat*srcVerts[index]) * weight;
if(newNorms.size() > index)
{
Ogre::Vector4 vec4(srcNorms[index][0], srcNorms[index][1], srcNorms[index][2], 0.0f);
vec4 = mat*vec4 * weight;
newNorms[index] += Ogre::Vector3(&vec4[0]);
}
}
}
srcVerts = newVerts;
srcNorms = newNorms;
}
else
{
Ogre::SkeletonManager *skelMgr = Ogre::SkeletonManager::getSingletonPtr();
if(skelMgr->getByName(mName).isNull())
{
// No skinning and no skeleton, so just transform the vertices and
// normals into position.
Ogre::Matrix4 mat4 = shape->getWorldTransform();
for(size_t i = 0;i < srcVerts.size();i++)
{
Ogre::Vector4 vec4(srcVerts[i].x, srcVerts[i].y, srcVerts[i].z, 1.0f);
vec4 = mat4*vec4;
srcVerts[i] = Ogre::Vector3(&vec4[0]);
}
for(size_t i = 0;i < srcNorms.size();i++)
{
Ogre::Vector4 vec4(srcNorms[i].x, srcNorms[i].y, srcNorms[i].z, 0.0f);
vec4 = mat4*vec4;
srcNorms[i] = Ogre::Vector3(&vec4[0]);
}
}
}
// Set the bounding box first
BoundsFinder bounds;
bounds.add(&srcVerts[0][0], srcVerts.size());
if(!bounds.isValid())
{
float v[3] = { 0.0f, 0.0f, 0.0f };
bounds.add(&v[0], 1);
}
mesh->_setBounds(Ogre::AxisAlignedBox(bounds.minX()-0.5f, bounds.minY()-0.5f, bounds.minZ()-0.5f,
bounds.maxX()+0.5f, bounds.maxY()+0.5f, bounds.maxZ()+0.5f));
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();
// 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(), vertUsage, vertShadowBuffer);
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(), vertUsage, vertShadowBuffer);
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);
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);
for(size_t i = 0; i < numUVs; i++)
decl->addElement(nextBuf, elemSize*i, Ogre::VET_FLOAT2, Ogre::VES_TEXTURE_COORDINATES, i);
vbuf = hwBufMgr->createVertexBuffer(decl->getVertexSize(nextBuf), srcVerts.size(),
Ogre::HardwareBuffer::HBU_STATIC);
std::vector<Ogre::Vector2> allUVs;
allUVs.reserve(srcVerts.size()*numUVs);
for (size_t vert = 0; vert<srcVerts.size(); ++vert)
for(size_t i = 0; i < numUVs; i++)
allUVs.push_back(data->uvlist[i][vert]);
vbuf->writeData(0, elemSize*srcVerts.size()*numUVs, &allUVs[0], true);
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);
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(skin != NULL)
{
Ogre::SkeletonPtr skel = Ogre::SkeletonManager::getSingleton().getByName(mName);
const Nif::NiSkinData *data = skin->data.getPtr();
const Nif::NodeList &bones = skin->bones;
for(size_t i = 0;i < bones.length();i++)
{
Ogre::VertexBoneAssignment boneInf;
boneInf.boneIndex = skel->getBone(bones[i]->name)->getHandle();
const std::vector<Nif::NiSkinData::VertWeight> &weights = data->bones[i].weights;
for(size_t j = 0;j < weights.size();j++)
{
boneInf.vertexIndex = weights[j].vertex;
boneInf.weight = weights[j].weight;
sub->addBoneAssignment(boneInf);
}
}
}
const Nif::NiTexturingProperty *texprop = NULL;
const Nif::NiMaterialProperty *matprop = NULL;
const Nif::NiAlphaProperty *alphaprop = NULL;
const Nif::NiVertexColorProperty *vertprop = NULL;
const Nif::NiZBufferProperty *zprop = NULL;
const Nif::NiSpecularProperty *specprop = NULL;
const Nif::NiWireframeProperty *wireprop = NULL;
bool needTangents = false;
shape->getProperties(texprop, matprop, alphaprop, vertprop, zprop, specprop, wireprop);
std::string matname = NIFMaterialLoader::getMaterial(data, mesh->getName(), mGroup,
texprop, matprop, alphaprop,
vertprop, zprop, specprop,
wireprop, needTangents);
if(matname.length() > 0)
sub->setMaterialName(matname);
// build tangents if the material needs them
if (needTangents)
{
unsigned short src,dest;
if (!mesh->suggestTangentVectorBuildParams(Ogre::VES_TANGENT, src,dest))
mesh->buildTangentVectors(Ogre::VES_TANGENT, src,dest);
}
// Create a dummy vertex animation track if there's a geom morpher controller
// This is required to make Ogre create the buffers we will use for software vertex animation
if (srcVerts.size() && geomMorpherController)
mesh->createAnimation("dummy", 0)->createVertexTrack(1, sub->vertexData, Ogre::VAT_MORPH);
}
