C++ AxisAlignedBox::transform方法代码示例

void MergeBounds(Ogre::SceneNode* node, Ogre::SceneNode* rootNode,
                  const Ogre::Matrix4& parentTransform, Ogre::AxisAlignedBox& aabb)
{
    // Get this nodes current transform
    Ogre::Matrix4 currentTransform = parentTransform;
    if (node != rootNode)
    {
        Ogre::Matrix4 localTransform(node->getOrientation());
        localTransform.setTrans(node->getPosition());
        currentTransform = currentTransform * localTransform;
    }

    // Merge this nodes objects
    Ogre::SceneNode::ObjectIterator object = node->getAttachedObjectIterator();
    while (object.hasMoreElements())
    {
        Ogre::AxisAlignedBox localAABB = object.getNext()->getBoundingBox();
        localAABB.transform(currentTransform);
        aabb.merge(localAABB);
    }

    // Iterate through all children and call this function on them
    Ogre::SceneNode::ChildNodeIterator child = node->getChildIterator();
    while (child.hasMoreElements())
    {
        MergeBounds(static_cast<Ogre::SceneNode*>(child.getNext()), rootNode, currentTransform, aabb);
    }
}

void InputGeometry::_calculateExtents()
{
	Ogre::Entity* ent = _sourceMeshes[0];
	Ogre::AxisAlignedBox sourceMeshBB = ent->getBoundingBox();
	Ogre::Matrix4 transform;
	transform = _referenceNode->_getFullTransform().inverse() * ent->getParentSceneNode()->_getFullTransform();
	sourceMeshBB.transform(transform);
	Ogre::Vector3 min = sourceMeshBB.getMinimum();
	Ogre::Vector3 max = sourceMeshBB.getMaximum();

	for(auto itr = _sourceMeshes.begin(); itr != _sourceMeshes.end(); ++itr)
	{
		Ogre::Entity* tmpEnt = *itr;

		transform = _referenceNode->_getFullTransform().inverse() * tmpEnt->getParentSceneNode()->_getFullTransform();

		sourceMeshBB = ent->getBoundingBox();
		sourceMeshBB.transform(transform);
		Ogre::Vector3 min2 = sourceMeshBB.getMinimum();
		if(min2.x < min.x)
            min.x = min2.x;
        if(min2.y < min.y)
            min.y = min2.y;
        if(min2.z < min.z)
            min.z = min2.z;

		Ogre::Vector3 max2 = sourceMeshBB.getMaximum();
		if(max2.x > max.x)
            max.x = max2.x;
        if(max2.y > max.y)
            max.y = max2.y;
        if(max2.z > max.z)
            max.z = max2.z;
	}

	if(!_boundMin)
	{
		_boundMin = new float[3];
	}
	if(!_boundMax)
	{
		_boundMax = new float[3];
	}
	Utility::vector3_toFloatPtr(min,_boundMin);
	Utility::vector3_toFloatPtr(max,_boundMax);
}

bool Panel::injectMouseMoved(const Ogre::Ray& ray)
{
    Ogre::Matrix4 transform;
    transform.makeTransform(mNode->getPosition(), mNode->getScale(), mNode->getOrientation());
   
    Ogre::AxisAlignedBox aabb = mScreenRenderable->getBoundingBox();
    aabb.transform(transform);
    pair<bool, Ogre::Real> result = Ogre::Math::intersects(ray, aabb);

    if (result.first == false)
    {
        unOverAllElements();
        return false;
    }

    Ogre::Vector3 a,b,c,d;
    Ogre::Vector2 halfSize = (mSize/100) * 0.5f;
    a = transform * Ogre::Vector3(-halfSize.x,-halfSize.y,0);
    b = transform * Ogre::Vector3( halfSize.x,-halfSize.y,0);
    c = transform * Ogre::Vector3(-halfSize.x, halfSize.y,0);
    d = transform * Ogre::Vector3( halfSize.x, halfSize.y,0);
    
    result = Ogre::Math::intersects(ray, c, b, a);
    if (result.first == false)
        result = Ogre::Math::intersects(ray, c, d, b);
    if (result.first == false)
    {
        unOverAllElements();
        return false;
    }
    if (result.second > mDistanceFromPanelToInteractWith)
    {
        unOverAllElements();
        return false;
    }

    Ogre::Vector3 hitPos = (ray.getOrigin() + (ray.getDirection() * result.second));
    Ogre::Vector3 localPos = transform.inverse() * hitPos;
    localPos.x += halfSize.x;
    localPos.y -= halfSize.y;
    localPos.x *= 100;
    localPos.y *= 100;
   
    // Cursor clip
    localPos.x = Ogre::Math::Clamp<Ogre::Real>(localPos.x, 0, mSize.x - 10);
    localPos.y = Ogre::Math::Clamp<Ogre::Real>(-localPos.y, 0, mSize.y - 18);

    mInternalMousePos = Ogre::Vector2(localPos.x, localPos.y);
    mMousePointer->position(mInternalMousePos);

    // Let's actualize the "over" for each elements
    for (size_t i=0; i < mPanelElements.size(); i++)
        mPanelElements[i]->isOver(mInternalMousePos);

    return true;
}

	bool DefaultCameraManager::canSee(RenderedObject* obj)
	{
		Ogre::AxisAlignedBox aabb = obj->getEntity()->getBoundingBox();
		Ogre::Matrix4 mat4 = Ogre::Matrix4::IDENTITY;
		mat4.setTrans(obj->getPosition());
		aabb.transform(mat4);
		return mCamera->isVisible(aabb);
		//Ogre::AxisAlignedBox aabb = obj->
		//if(mCamera->isVisible(
	}

  Button* check(const Ogre::Ray& ray, bool& isOver)
  {
   
   isOver = false;
   
   Ogre::Matrix4 transform;
   transform.makeTransform(mNode->getPosition(), mNode->getScale(), mNode->getOrientation());
   
   Ogre::AxisAlignedBox aabb = mScreen->getBoundingBox();
   aabb.transform(transform);
   std::pair<bool, Ogre::Real> result = Ogre::Math::intersects(ray, aabb);

   if (result.first == false)
     return 0;
   
   Ogre::Vector3 a,b,c,d;
   Ogre::Vector2 halfSize = mSize * 0.5f;
   a = transform * Ogre::Vector3(-halfSize.x,-halfSize.y,0);
   b = transform * Ogre::Vector3( halfSize.x,-halfSize.y,0);
   c = transform * Ogre::Vector3(-halfSize.x, halfSize.y,0);
   d = transform * Ogre::Vector3( halfSize.x, halfSize.y,0);
    
   result = Ogre::Math::intersects(ray, c, b, a);
   if (result.first == false)
    result = Ogre::Math::intersects(ray, c, d, b);
   if (result.first == false)
    return 0;
   
   if (result.second > 6.0f)
    return 0;
   
   isOver = true;
   
   Ogre::Vector3 hitPos = ( ray.getOrigin() + (ray.getDirection() * result.second) );
   Ogre::Vector3 localPos = transform.inverse() * hitPos;
   localPos.x += halfSize.x;
   localPos.y -= halfSize.y;
   localPos.x *= 100;
   localPos.y *= 100;
   
   // Cursor clip
   localPos.x = Ogre::Math::Clamp<Ogre::Real>(localPos.x, 0, (mSize.x * 100) - 10);
   localPos.y = Ogre::Math::Clamp<Ogre::Real>(-localPos.y, 0, (mSize.y * 100) - 18);
   
   mMousePointer->position(localPos.x, localPos.y);

   for (size_t i=0;i < mButtons.size();i++)
   {
    if (mButtons[i]->isOver(mMousePointer->position()))
     return mButtons[i];
   }
   
   return 0;
  }

Ogre::AxisAlignedBox AACamera::GetBoundingBox(bool transformed) const
{	
	Ogre::AxisAlignedBox box = Box;
	if (!transformed)
		return box;

	Ogre::Matrix4 transforms;
	//Node->getWorldTransforms(&transforms);
	transforms.makeTransform(Node->getPosition(),Node->getScale(),Node->getOrientation());
	box.transform(transforms);
	return box;
}

void InputGeometry::_convertOgreEntities(const Ogre::AxisAlignedBox& tileBounds)
{
	std::vector<Ogre::Entity*> selectedEntities;
	Ogre::AxisAlignedBox boundingBox;
	Ogre::Matrix4 transform;
	for(auto itr = _sourceMeshes.begin(); itr != _sourceMeshes.end(); ++itr)
	{
		transform = _referenceNode->_getFullTransform().inverse() * (*itr)->getParentSceneNode()->_getFullTransform();
		boundingBox = (*itr)->getBoundingBox();
		boundingBox.transform(transform);
		if(boundingBox.intersects(tileBounds))
		{
			selectedEntities.push_back(*itr);
		}
	}

	_sourceMeshes.clear();
	_sourceMeshes = selectedEntities;

	_convertOgreEntities();
}