void inherit(MyHull &c)
{
Vec3Vector::iterator i;
for (i=c.mPoints.begin(); i!=c.mPoints.end(); ++i)
{
mPoints.push_back( (*i) );
}
c.mPoints.clear();
c.mValidHull = false;
generateHull();
}
void LodOutsideMarker::markOutside()
{
generateHull();
markVertices();
}
Ogre::MeshPtr LodOutsideMarker::createConvexHullMesh(const String& meshName, const String& resourceGroupName)
{
// Based on the wiki sample: http://www.ogre3d.org/tikiwiki/tiki-index.php?page=Generating+A+Mesh
// Resource with given name should not exist!
assert(MeshManager::getSingleton().getByName(meshName).isNull());
generateHull(); // calculate mHull triangles.
// Convex hull can't be empty!
assert(!mHull.empty());
MeshPtr mesh = MeshManager::getSingleton().createManual(meshName, resourceGroupName, NULL);
SubMesh* subMesh = mesh->createSubMesh();
vector<Real>::type vertexBuffer;
vector<unsigned short>::type indexBuffer;
// 3 position/triangle * 3 Real/position
vertexBuffer.reserve(mHull.size() * 9);
// 3 index / triangle
indexBuffer.reserve(mHull.size() * 3);
int id=0;
// min & max position
Vector3 minBounds(std::numeric_limits<Real>::max(), std::numeric_limits<Real>::max(), std::numeric_limits<Real>::max());
Vector3 maxBounds(std::numeric_limits<Real>::min(), std::numeric_limits<Real>::min(), std::numeric_limits<Real>::min());
for (size_t i = 0; i < mHull.size(); i++) {
assert(!mHull[i].removed);
for(size_t n = 0; n < 3; n++){
indexBuffer.push_back(id++);
vertexBuffer.push_back(mHull[i].vertex[n]->position.x);
vertexBuffer.push_back(mHull[i].vertex[n]->position.y);
vertexBuffer.push_back(mHull[i].vertex[n]->position.z);
minBounds.x = std::min<Real>(minBounds.x, mHull[i].vertex[n]->position.x);
minBounds.y = std::min<Real>(minBounds.y, mHull[i].vertex[n]->position.y);
minBounds.z = std::min<Real>(minBounds.z, mHull[i].vertex[n]->position.z);
maxBounds.x = std::max<Real>(maxBounds.x, mHull[i].vertex[n]->position.x);
maxBounds.y = std::max<Real>(maxBounds.y, mHull[i].vertex[n]->position.y);
maxBounds.z = std::max<Real>(maxBounds.z, mHull[i].vertex[n]->position.z);
}
}
/// Create vertex data structure for 8 vertices shared between submeshes
mesh->sharedVertexData = new VertexData();
mesh->sharedVertexData->vertexCount = mHull.size() * 3;
/// Create declaration (memory format) of vertex data
VertexDeclaration* decl = mesh->sharedVertexData->vertexDeclaration;
size_t offset = 0;
// 1st buffer
decl->addElement(0, offset, VET_FLOAT3, VES_POSITION);
offset += VertexElement::getTypeSize(VET_FLOAT3);
/// Allocate vertex buffer of the requested number of vertices (vertexCount)
/// and bytes per vertex (offset)
HardwareVertexBufferSharedPtr vbuf =
HardwareBufferManager::getSingleton().createVertexBuffer(
offset, mesh->sharedVertexData->vertexCount, HardwareBuffer::HBU_STATIC_WRITE_ONLY);
/// Upload the vertex data to the card
vbuf->writeData(0, vbuf->getSizeInBytes(), &vertexBuffer[0], true);
/// Set vertex buffer binding so buffer 0 is bound to our vertex buffer
VertexBufferBinding* bind = mesh->sharedVertexData->vertexBufferBinding;
bind->setBinding(0, vbuf);
/// Allocate index buffer of the requested number of vertices (ibufCount)
HardwareIndexBufferSharedPtr ibuf = HardwareBufferManager::getSingleton().
createIndexBuffer(
HardwareIndexBuffer::IT_16BIT,
indexBuffer.size(),
HardwareBuffer::HBU_STATIC_WRITE_ONLY);
/// Upload the index data to the card
ibuf->writeData(0, ibuf->getSizeInBytes(), &indexBuffer[0], true);
/// Set parameters of the submesh
subMesh->useSharedVertices = true;
subMesh->indexData->indexBuffer = ibuf;
subMesh->indexData->indexCount = indexBuffer.size();
subMesh->indexData->indexStart = 0;
/// Set bounding information (for culling)
mesh->_setBounds(AxisAlignedBox(minBounds, maxBounds));
mesh->_setBoundingSphereRadius(maxBounds.distance(minBounds) / 2.0f);
/// Set material to transparent blue
subMesh->setMaterialName("Examples/TransparentBlue50");
/// Notify -Mesh object that it has been loaded
mesh->load();
return mesh;
}
