How to move an entity with a mouse click? - c++

Question

Ok i now manage to figure out the problem but now another issue appear, my robot seem to move on its own to another point which i have no idea where its from. Here my code
His code make this robot move to the location i click on the terrain.
bool DemoApp::nextLocation(void){
mDestination = mtoward;
mRobotDir = mDestination - mRobotNode[0]->getPosition();
mDistance = mRobotDir.normalise();
return true;
}
bool DemoApp::frameRenderingQueued(const Ogre::FrameEvent& evt)
{
if (mRobotDir == Ogre::Vector3::ZERO) {
if (nextLocation()) {
// Set walking animation
mAnimationState = mRobot[0]->getAnimationState("Walk");
mAnimationState->setLoop(true);
mAnimationState->setEnabled(true);
}//if
}else{
Ogre::Real move = mWalkSpeed * evt.timeSinceLastFrame;
mDistance -= move;
if (mDistance <= 0.0f){
mRobotNode[0]->setPosition(mDestination);
mRobotDir = Ogre::Vector3::ZERO;
// Set animation based on if the robot has another point to walk to.
if (!nextLocation()){
// Set Idle animation
mAnimationState = mRobot[0]->getAnimationState("Idle");
mAnimationState->setLoop(true);
mAnimationState->setEnabled(true);
}else{
// Rotation Code will go here later
Ogre::Vector3 src = mRobotNode[0]->getOrientation() * Ogre::Vector3::UNIT_X;
if ((1.0f + src.dotProduct(mRobotDir)) < 0.0001f) {
mRobotNode[0]->yaw(Ogre::Degree(180));
}else{
Ogre::Quaternion quat = src.getRotationTo(mRobotDir);
mRobotNode[0]->rotate(quat);
} // else
}//else
}else{
mRobotNode[0]->translate(mRobotDir * move);
} // else
} // if
mAnimationState->addTime(evt.timeSinceLastFrame);
}
Here is the raycast code for my mouse click
Ogre::Terrain* pTerrain = mTerrainGroup->getTerrain(0, 0);
Ogre::Viewport* vp = this->mWindow->getViewport(0);
Ogre::Ray mouseRay = mCamera->getCameraToViewportRay(static_cast<float>(mMouse->getMouseState().X.abs)/mMouse->getMouseState().width, static_cast<float>(mMouse->getMouseState().Y.abs)/mMouse->getMouseState().height);
std::pair <bool, Ogre::Vector3> result;
result = pTerrain->rayIntersects(mouseRay, true, 0);
if (result.first = true)
{
mtoward = result.second - mRobotNode[0]->_getDerivedPosition();
mRobotNode[0]->translate(mtoward, Ogre::Node::TS_LOCAL);
}