C++ LLBBox::getExtentLocal方法代码示例

// only works for our specialized (AABB, position centered) bboxes
BOOL bbox_overlap(LLBBox bbox1, LLBBox bbox2)
{
	const F32 FUDGE = 0.001f;  // because of SL precision/rounding
	
	LLVector3 delta = bbox1.getCenterAgent() - bbox2.getCenterAgent();

	LLVector3 half_extent = (bbox1.getExtentLocal() + bbox2.getExtentLocal()) / 2.0;

	return ((fabs(delta.mV[VX]) < half_extent.mV[VX] - FUDGE) &&
			(fabs(delta.mV[VY]) < half_extent.mV[VY] - FUDGE) &&
			(fabs(delta.mV[VZ]) < half_extent.mV[VZ] - FUDGE));
}

// This function calculates the aspect ratio and the world aligned components of a selection bounding box.
F32 LLViewerMediaFocus::getBBoxAspectRatio(const LLBBox& bbox, const LLVector3& normal, F32* height, F32* width, F32* depth)
{
	// Convert the selection normal and an up vector to local coordinate space of the bbox
	LLVector3 local_normal = bbox.agentToLocalBasis(normal);
	LLVector3 z_vec = bbox.agentToLocalBasis(LLVector3(0.0f, 0.0f, 1.0f));
	
	LLVector3 comp1(0.f,0.f,0.f);
	LLVector3 comp2(0.f,0.f,0.f);
	LLVector3 bbox_max = bbox.getExtentLocal();
	F32 dot1 = 0.f;
	F32 dot2 = 0.f;
	
	lldebugs << "bounding box local size = " << bbox_max << ", local_normal = " << local_normal << llendl;

	// The largest component of the localized normal vector is the depth component
	// meaning that the other two are the legs of the rectangle.
	local_normal.abs();
	
	// Using temporary variables for these makes the logic a bit more readable.
	bool XgtY = (local_normal.mV[VX] > local_normal.mV[VY]);
	bool XgtZ = (local_normal.mV[VX] > local_normal.mV[VZ]);
	bool YgtZ = (local_normal.mV[VY] > local_normal.mV[VZ]);
	
	if(XgtY && XgtZ)
	{
		lldebugs << "x component of normal is longest, using y and z" << llendl;
		comp1.mV[VY] = bbox_max.mV[VY];
		comp2.mV[VZ] = bbox_max.mV[VZ];
		*depth = bbox_max.mV[VX];
	}
	else if(!XgtY && YgtZ)
	{
		lldebugs << "y component of normal is longest, using x and z" << llendl;
		comp1.mV[VX] = bbox_max.mV[VX];
		comp2.mV[VZ] = bbox_max.mV[VZ];
		*depth = bbox_max.mV[VY];
	}
	else
	{
		lldebugs << "z component of normal is longest, using x and y" << llendl;
		comp1.mV[VX] = bbox_max.mV[VX];
		comp2.mV[VY] = bbox_max.mV[VY];
		*depth = bbox_max.mV[VZ];
	}
	
	// The height is the vector closest to vertical in the bbox coordinate space (highest dot product value)
	dot1 = comp1 * z_vec;
	dot2 = comp2 * z_vec;
	if(fabs(dot1) > fabs(dot2))
	{
		*height = comp1.length();
		*width = comp2.length();

		lldebugs << "comp1 = " << comp1 << ", height = " << *height << llendl;
		lldebugs << "comp2 = " << comp2 << ", width = " << *width << llendl;
	}
	else
	{
		*height = comp2.length();
		*width = comp1.length();

		lldebugs << "comp2 = " << comp2 << ", height = " << *height << llendl;
		lldebugs << "comp1 = " << comp1 << ", width = " << *width << llendl;
	}
	
	lldebugs << "returning " << (*width / *height) << llendl;

	// Return the aspect ratio.
	return *width / *height;
}

//.........这里部分代码省略.........
				selectionPropertiesReceived();
			}
			return TRUE;
		case CLICK_ACTION_OPEN:
			if (parent && parent->allowOpen())
			{
				mClickActionObject = parent;
				mLeftClickSelection = LLToolSelect::handleObjectSelection(mPick, FALSE, TRUE, TRUE);
				if (LLSelectMgr::getInstance()->selectGetAllValid())
				{
					// call this right away, since we have all the info we need to continue the action
					selectionPropertiesReceived();
				}
			}
			return TRUE;	
		case CLICK_ACTION_PLAY:
			handle_click_action_play();
			return TRUE;
		case CLICK_ACTION_OPEN_MEDIA:
			// mClickActionObject = object;
			handle_click_action_open_media(object);
			return TRUE;
		case CLICK_ACTION_ZOOM:
			{	
				const F32 PADDING_FACTOR = 2.f;
				LLViewerObject* object = gObjectList.findObject(mPick.mObjectID);
				
				if (object)
				{
					gAgentCamera.setFocusOnAvatar(FALSE, ANIMATE);
					
					LLBBox bbox = object->getBoundingBoxAgent() ;
					F32 angle_of_view = llmax(0.1f, LLViewerCamera::getInstance()->getAspect() > 1.f ? LLViewerCamera::getInstance()->getView() * LLViewerCamera::getInstance()->getAspect() : LLViewerCamera::getInstance()->getView());
					F32 distance = bbox.getExtentLocal().magVec() * PADDING_FACTOR / atan(angle_of_view);
				
					LLVector3 obj_to_cam = LLViewerCamera::getInstance()->getOrigin() - bbox.getCenterAgent();
					obj_to_cam.normVec();
					
					LLVector3d object_center_global = gAgent.getPosGlobalFromAgent(bbox.getCenterAgent());
					gAgentCamera.setCameraPosAndFocusGlobal(object_center_global + LLVector3d(obj_to_cam * distance), 
													  object_center_global, 
													  mPick.mObjectID );
				}
			}
			return TRUE;			
		default:
			// nothing
			break;
		}
	}

	// put focus back "in world"
	gFocusMgr.setKeyboardFocus(NULL);

	BOOL touchable = (object && object->flagHandleTouch()) 
					 || (parent && parent->flagHandleTouch());

	// Switch to grab tool if physical or triggerable
	if (object && 
		!object->isAvatar() && 
		((object->usePhysics() || (parent && !parent->isAvatar() && parent->usePhysics())) || touchable) 
		)
	{
		gGrabTransientTool = this;
		LLToolMgr::getInstance()->getCurrentToolset()->selectTool( LLToolGrab::getInstance() );
		return LLToolGrab::getInstance()->handleObjectHit( mPick );

// This function calculates the aspect ratio and the world aligned components of a selection bounding box.
F32 LLViewerMediaFocus::getBBoxAspectRatio(const LLBBox& bbox, const LLVector3& normal, F32* height, F32* width, F32* depth)
{
	// Convert the selection normal and an up vector to local coordinate space of the bbox
	LLVector3 local_normal = bbox.agentToLocalBasis(normal);
	LLVector3 z_vec = bbox.agentToLocalBasis(LLVector3(0.0f, 0.0f, 1.0f));
	
	LLVector3 comp1(0.f,0.f,0.f);
	LLVector3 comp2(0.f,0.f,0.f);
	LLVector3 bbox_max = bbox.getExtentLocal();
	F32 dot1 = 0.f;
	F32 dot2 = 0.f;

	// The largest component of the localized normal vector is the depth component
	// meaning that the other two are the legs of the rectangle.
	local_normal.abs();
	if(local_normal.mV[VX] > local_normal.mV[VY])
	{
		if(local_normal.mV[VX] > local_normal.mV[VZ])
		{
			// Use the y and z comps
			comp1.mV[VY] = bbox_max.mV[VY];
			comp2.mV[VZ] = bbox_max.mV[VZ];
			*depth = bbox_max.mV[VX];
		}
		else
		{
			// Use the x and y comps
			comp1.mV[VY] = bbox_max.mV[VY];
			comp2.mV[VZ] = bbox_max.mV[VZ];
			*depth = bbox_max.mV[VZ];
		}
	}
	else if(local_normal.mV[VY] > local_normal.mV[VZ])
	{
		// Use the x and z comps
		comp1.mV[VX] = bbox_max.mV[VX];
		comp2.mV[VZ] = bbox_max.mV[VZ];
		*depth = bbox_max.mV[VY];
	}
	else
	{
		// Use the x and y comps
		comp1.mV[VY] = bbox_max.mV[VY];
		comp2.mV[VZ] = bbox_max.mV[VZ];
		*depth = bbox_max.mV[VX];
	}
	
	// The height is the vector closest to vertical in the bbox coordinate space (highest dot product value)
	dot1 = comp1 * z_vec;
	dot2 = comp2 * z_vec;
	if(fabs(dot1) > fabs(dot2))
	{
		*height = comp1.length();
		*width = comp2.length();
	}
	else
	{
		*height = comp2.length();
		*width = comp1.length();
	}

	// Return the aspect ratio.
	return *width / *height;
}