void LLToolGrab::startGrab()
{
// Compute grab_offset in the OBJECT's root's coordinate frame
// (sometimes root == object)
LLViewerObject* objectp = mGrabPick.getObject();
if (!objectp)
{
return;
}
LLViewerObject *root = (LLViewerObject *)objectp->getRoot();
// drag from center
LLVector3d grab_start_global = root->getPositionGlobal();
// Where the grab starts, relative to the center of the root object of the set.
// JC - This code looks wonky, but I believe it does the right thing.
// Otherwise, when you grab a linked object set, it "pops" on the start
// of the drag.
LLVector3d grab_offsetd = root->getPositionGlobal() - objectp->getPositionGlobal();
LLVector3 grab_offset;
grab_offset.setVec(grab_offsetd);
LLQuaternion rotation = root->getRotation();
rotation.conjQuat();
grab_offset = grab_offset * rotation;
// This planar drag starts at the grab point
mDragStartPointGlobal = grab_start_global;
mDragStartFromCamera = grab_start_global - gAgent.getCameraPositionGlobal();
LLMessageSystem *msg = gMessageSystem;
msg->newMessageFast(_PREHASH_ObjectGrab);
msg->nextBlockFast(_PREHASH_AgentData);
msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
msg->nextBlockFast(_PREHASH_ObjectData);
msg->addU32Fast(_PREHASH_LocalID, objectp->mLocalID);
msg->addVector3Fast(_PREHASH_GrabOffset, grab_offset );
msg->nextBlock("SurfaceInfo");
msg->addVector3("UVCoord", LLVector3(mGrabPick.mUVCoords));
msg->addVector3("STCoord", LLVector3(mGrabPick.mSTCoords));
msg->addS32Fast(_PREHASH_FaceIndex, mGrabPick.mObjectFace);
msg->addVector3("Position", mGrabPick.mIntersection);
msg->addVector3("Normal", mGrabPick.mNormal);
msg->addVector3("Binormal", mGrabPick.mBinormal);
msg->sendMessage( objectp->getRegion()->getHost());
mGrabOffsetFromCenterInitial = grab_offset;
mGrabHiddenOffsetFromCamera = mDragStartFromCamera;
mGrabTimer.reset();
}
void LLToolGrab::startGrab()
{
// Compute grab_offset in the OBJECT's root's coordinate frame
// (sometimes root == object)
LLViewerObject* objectp = mGrabPick.getObject();
if (!objectp)
{
return;
}
LLViewerObject *root = (LLViewerObject *)objectp->getRoot();
// drag from center
LLVector3d grab_start_global = root->getPositionGlobal();
// Where the grab starts, relative to the center of the root object of the set.
// JC - This code looks wonky, but I believe it does the right thing.
// Otherwise, when you grab a linked object set, it "pops" on the start
// of the drag.
LLVector3d grab_offsetd = root->getPositionGlobal() - objectp->getPositionGlobal();
LLVector3 grab_offset;
grab_offset.setVec(grab_offsetd);
LLQuaternion rotation = root->getRotation();
rotation.conjQuat();
grab_offset = grab_offset * rotation;
// This planar drag starts at the grab point
mDragStartPointGlobal = grab_start_global;
mDragStartFromCamera = grab_start_global - gAgentCamera.getCameraPositionGlobal();
send_ObjectGrab_message(objectp, mGrabPick, grab_offset);
mGrabOffsetFromCenterInitial = grab_offset;
mGrabHiddenOffsetFromCamera = mDragStartFromCamera;
mGrabTimer.reset();
mLastUVCoords = mGrabPick.mUVCoords;
mLastSTCoords = mGrabPick.mSTCoords;
mLastFace = mGrabPick.mObjectFace;
mLastIntersection = mGrabPick.mIntersection;
mLastNormal = mGrabPick.mNormal;
mLastBinormal = mGrabPick.mBinormal;
mLastGrabPos = LLVector3(-1.f, -1.f, -1.f);
}
