void OgreMesh::syncFromOgreMesh(Ogre::Entity *entity,Ogre::SubMesh*subMesh)
{
const Ogre::Vector3 &position = entity->getParentNode()->_getDerivedPosition();
const Ogre::Quaternion &orient = entity->getParentNode()->_getDerivedOrientation();
const Ogre::Vector3 &scale = entity->getParentNode()->_getDerivedScale();
VertexData *vertexData = subMesh->vertexData;
if (vertexData) {
VertexDeclaration *vertexDecl = vertexData->vertexDeclaration;
// find the element for position
const VertexElement *element = vertexDecl->findElementBySemantic(Ogre::VES_POSITION);
// find and lock the buffer containing position information
VertexBufferBinding *bufferBinding = vertexData->vertexBufferBinding;
HardwareVertexBuffer *buffer = bufferBinding->getBuffer(element->getSource()).get();
unsigned char *pVert = static_cast<unsigned char*>(buffer->lock(HardwareBuffer::HBL_READ_ONLY));
std::vector<Ogre::Vector3> lvertices;
for (size_t vert = 0; vert < vertexData->vertexCount; vert++) {
Real *vertex = 0;
Real x, y, z;
element->baseVertexPointerToElement(pVert, &vertex);
x = *vertex++;
y = *vertex++;
z = *vertex++;
Ogre::Vector3 vec(x, y, z);
vec = (orient * (vec * scale)) + position;
lvertices.push_back(vec);
pVert += buffer->getVertexSize();
}
buffer->unlock();
// find and lock buffer containg vertex indices
IndexData * indexData = subMesh->indexData;
HardwareIndexBuffer *indexBuffer = indexData->indexBuffer.get();
void *pIndex = static_cast<unsigned char *>(indexBuffer->lock(HardwareBuffer::HBL_READ_ONLY));
if (indexBuffer->getType() == HardwareIndexBuffer::IT_16BIT) {
for (size_t index = indexData->indexStart; index < indexData->indexCount; ) {
uint16 *uint16Buffer = (uint16 *) pIndex;
uint16 v1 = uint16Buffer[index++];
uint16 v2 = uint16Buffer[index++];
uint16 v3 = uint16Buffer[index++];
mTriangles.push_back(Triangle(lvertices[v1], lvertices[v2], lvertices[v3]));
}
} else if (indexBuffer->getType() == HardwareIndexBuffer::IT_32BIT) {
for (size_t index = indexData->indexStart; index < indexData->indexCount; ) {
uint32 *uint16Buffer = (uint32 *) pIndex;
uint32 v1 = uint16Buffer[index++];
uint32 v2 = uint16Buffer[index++];
uint32 v3 = uint16Buffer[index++];
mTriangles.push_back(Triangle(lvertices[v1], lvertices[v2], lvertices[v3]));
}
} else {
assert(0);
}
indexBuffer->unlock();
}
}
void OgreMesh::syncFromOgreMesh(Ogre::SubMesh*subMesh, bool texcoord, std::vector<TriVertex>& sharedVertices)
{
VertexData *vertexData;
std::vector<TriVertex> subVertices;
std::vector<TriVertex> *lpvertices;
if (subMesh->useSharedVertices) {
vertexData = subMesh->parent->sharedVertexData;
lpvertices=&sharedVertices;
}else {
vertexData = subMesh->vertexData;
lpvertices=&subVertices;
}
std::vector<TriVertex>&lvertices=*lpvertices;
if (vertexData)
{
VertexDeclaration *vertexDecl = vertexData->vertexDeclaration;
// find the element for position
const VertexElement *element = vertexDecl->findElementBySemantic(Ogre::VES_POSITION);
const VertexElement *texelement = texcoord ? vertexDecl->findElementBySemantic(Ogre::VES_TEXTURE_COORDINATES) : NULL;
// find and lock the buffer containing position information
VertexBufferBinding *bufferBinding = vertexData->vertexBufferBinding;
HardwareVertexBuffer *buffer = bufferBinding->getBuffer(element->getSource()).get();
if (lvertices.empty()) {
unsigned char *pVert = static_cast<unsigned char*>(buffer->lock(HardwareBuffer::HBL_READ_ONLY));
HardwareVertexBuffer *texbuffer = texelement ? bufferBinding->getBuffer(texelement->getSource()).get() : NULL;
unsigned char *pTexVert = texbuffer
? (texbuffer == buffer ? pVert : static_cast<unsigned char*>(texbuffer->lock(HardwareBuffer::HBL_READ_ONLY)))
: NULL;
for (size_t vert = 0; vert < vertexData->vertexCount; vert++)
{
float *vertex = 0;
Real x, y, z;
element->baseVertexPointerToElement(pVert, &vertex);
x = *vertex++;
y = *vertex++;
z = *vertex++;
Ogre::Vector3 vec(x, y, z);
Ogre::Vector2 texvec(0,0);
if (texelement)
{
float *texvertex = 0;
float u, v, w;
texelement->baseVertexPointerToElement(pTexVert, &texvertex);
u = *texvertex++;
v = *texvertex++;
texvec = Ogre::Vector2(u, v);
pTexVert += texbuffer->getVertexSize();
}
lvertices.push_back(TriVertex(vec, texvec.x, texvec.y));
pVert += buffer->getVertexSize();
}
buffer->unlock();
}
// find and lock buffer containg vertex indices
Ogre::RenderOperation ro;
subMesh->_getRenderOperation(ro);
if (ro.useIndexes)
{
IndexData * indexData = subMesh->indexData;
HardwareIndexBuffer *indexBuffer = indexData->indexBuffer.get();
void *pIndex = static_cast<unsigned char *>(indexBuffer->lock(HardwareBuffer::HBL_READ_ONLY));
if (indexBuffer->getType() == HardwareIndexBuffer::IT_16BIT)
{
for (size_t index = indexData->indexStart; index < indexData->indexCount; )
{
uint16 *uint16Buffer = (uint16 *) pIndex;
uint16 v1 = uint16Buffer[index++];
uint16 v2 = uint16Buffer[index++];
uint16 v3 = uint16Buffer[index++];
if (v1 < lvertices.size() && v2 < lvertices.size() && v3 < lvertices.size())
mTriangles.push_back(Triangle(lvertices[v1], lvertices[v2], lvertices[v3]));
}
}
else if (indexBuffer->getType() == HardwareIndexBuffer::IT_32BIT)
{
for (size_t index = indexData->indexStart; index < indexData->indexCount; )
{
uint32 *uint16Buffer = (uint32 *) pIndex;
uint32 v1 = uint16Buffer[index++];
uint32 v2 = uint16Buffer[index++];
uint32 v3 = uint16Buffer[index++];
if (v1 < lvertices.size() && v2 < lvertices.size() && v3 < lvertices.size())
mTriangles.push_back(Triangle(lvertices[v1], lvertices[v2], lvertices[v3]));
}
}
else
{
assert(0);
}
indexBuffer->unlock();
}
else
{
for (unsigned int i=0; i<lvertices.size(); i+=3)
{
mTriangles.push_back(Triangle(lvertices[i], lvertices[i+1], lvertices[i+2]));
}
}
}
}