bool CollisionTools::raycast(const Ogre::Ray &ray, Ogre::Vector3 &result,Ogre::MovableObject* &target,float &closest_distance, const Ogre::uint32 queryMask)
{
target = NULL;
// check we are initialised
if (mRaySceneQuery != NULL)
{
// create a query object
mRaySceneQuery->setRay(ray);
mRaySceneQuery->setSortByDistance(true);
mRaySceneQuery->setQueryMask(queryMask);
// execute the query, returns a vector of hits
if (mRaySceneQuery->execute().size() <= 0)
{
// raycast did not hit an objects bounding box
return (false);
}
}
else
{
//LOG_ERROR << "Cannot raycast without RaySceneQuery instance" << ENDLOG;
return (false);
}
// at this point we have raycast to a series of different objects bounding boxes.
// we need to test these different objects to see which is the first polygon hit.
// there are some minor optimizations (distance based) that mean we wont have to
// check all of the objects most of the time, but the worst case scenario is that
// we need to test every triangle of every object.
//Ogre::Ogre::Real closest_distance = -1.0f;
closest_distance = -1.0f;
Ogre::Vector3 closest_result;
Ogre::RaySceneQueryResult &query_result = mRaySceneQuery->getLastResults();
for (size_t qr_idx = 0; qr_idx < query_result.size(); qr_idx++)
{
// stop checking if we have found a raycast hit that is closer
// than all remaining entities
if ((closest_distance >= 0.0f) &&
(closest_distance < query_result[qr_idx].distance))
{
break;
}
// Only check this result if its a hit against an Entity or
// ManualObject.
if ((query_result[qr_idx].movable != NULL) &&
(query_result[qr_idx].movable->isVisible()) &&
((query_result[qr_idx].movable->getMovableType().compare("Entity") == 0) ||
(query_result[qr_idx].movable->getMovableType().compare("ManualObject") == 0)))
{
// get the entity to check
Ogre::MovableObject *pmovable =
static_cast<Ogre::MovableObject*>(query_result[qr_idx].movable);
Ogre::MeshPtr mesh_ptr;
if (query_result[qr_idx].movable->getMovableType().compare("Entity") == 0)
{
mesh_ptr = ((Ogre::Entity*)pmovable)->getMesh();
}
else
{
// XXX: Does "Mesh" get replaced so we can get away with not
// XXX: deleting it for now?
mesh_ptr = ((Ogre::ManualObject*)pmovable)->convertToMesh("Mesh", "General");
}
// mesh data to retrieve
size_t vertex_count;
size_t index_count;
Ogre::Vector3 *vertices;
Ogre::uint32 *indices;
// get the mesh information
GetMeshInformation(mesh_ptr, vertex_count, vertices, index_count, indices, pmovable->getParentNode()->_getDerivedPosition(), pmovable->getParentNode()->_getDerivedOrientation(), pmovable->getParentNode()->_getDerivedScale());
// test for hitting individual triangles on the mesh
bool new_closest_found = false;
for (size_t i = 0; i < index_count; i += 3)
{
// check for a hit against this triangle
std::pair<bool, Ogre::Real> hit = Ogre::Math::intersects(ray, vertices[indices[i]],
vertices[indices[i+1]], vertices[indices[i+2]], true, false);
// if it was a hit check if its the closest
if (hit.first)
{
if ((closest_distance < 0.0f) ||
(hit.second < closest_distance))
{
// this is the closest so far, save it off
closest_distance = hit.second;
new_closest_found = true;
}
}
}
// free the verticies and indicies memory
delete[] vertices;
delete[] indices;
// if we found a new closest raycast for this object, update the
// closest_result before moving on to the next object.
if (new_closest_found)
{
target = pmovable;
closest_result = ray.getPoint(closest_distance);
}
}
}
// return the result
if (closest_distance >= 0.0f)
{
// raycast success
result = closest_result;
return (true);
}
else
{
// raycast failed
return (false);
}
}
void
System::makeObjectTransparent( const Ogre::Vector3 &start, const Ogre::Vector3 &end, float nNewTrans, float nDelay, IObjectFilter *pFilter )
{
Ogre::Vector3 vDirction = (start-end);
Ogre::Real fDistance = vDirction.length();
Ogre::Ray ray = Ogre::Ray(end,vDirction);
Ogre::RaySceneQuery* raySceneQuery = getSceneManager()->createRayQuery(Ogre::Ray());
std::set<Fairy::Object*> setCurrentTransparentObjects;
raySceneQuery->setRay(ray);
const Ogre::RaySceneQueryResult& queryResult = raySceneQuery->execute();
for (Ogre::RaySceneQueryResult::const_iterator it = queryResult.begin(); it != queryResult.end(); ++it)
{
Ogre::MovableObject* pMovable = it->movable;
Ogre::Vector3 vObjectPos = pMovable->getParentNode()->getPosition();
Ogre::Vector3 vObjectDir = (vObjectPos-end);
Fairy::ObjectPtr pObject = Fairy::getObjectFromMovable(pMovable);
if(pObject)
{
// 当满足以下条件时设置透明: 1.是StaticEntity类型; 2.相交; 3.允许透明
if(pObject->getType() == "StaticEntity" && vObjectDir.dotProduct(vDirction) > 0 && static_cast<Fairy::StaticEntityObject*>(pObject.get())->getEnableTransparency())
{
Fairy::StaticEntityObject* pModel = static_cast<Fairy::StaticEntityObject*>(pObject.get());
pModel->setTransparency(0.5f);
// 删除原有的Object，放到临时的Set中
m_setTransparencyObjects.erase(pObject.get());
setCurrentTransparentObjects.insert(pObject.get());
}
}
}
std::set<Fairy::Object*>::iterator iter = m_setTransparencyObjects.begin();
std::set<Fairy::Object*>::iterator tempIter;
while (iter != m_setTransparencyObjects.end())
{
tempIter = iter;
++iter;
// 恢复没有遮挡的Object的透明度为0
Fairy::StaticEntityObject* pModel = static_cast<Fairy::StaticEntityObject*>(*tempIter);
pModel->setTransparency(0);
// 删除透明度为0的Object
if (pModel->getTransparency()==0)
{
m_setTransparencyObjects.erase(tempIter);
}
}
// 将遮挡的Object放到m_setTransparencyObjects
for (std::set<Fairy::Object*>::iterator it = setCurrentTransparentObjects.begin(); it != setCurrentTransparentObjects.end(); ++it)
{
m_setTransparencyObjects.insert(*it);
}
if(raySceneQuery)
{
getSceneManager()->destroyQuery(raySceneQuery);
raySceneQuery = NULL;
}
}
bool CollisionTools::raycast(const Ogre::Ray &ray, Ogre::Vector3 &result,Ogre::MovableObject* &target,float &closest_distance, const Ogre::uint32 queryMask)
{
target = NULL;
// check we are initialised
if (mRaySceneQuery != NULL)
{
// create a query object
mRaySceneQuery->setRay(ray);
mRaySceneQuery->setSortByDistance(true);
mRaySceneQuery->setQueryMask(queryMask);
// execute the query, returns a vector of hits
if (mRaySceneQuery->execute().size() <= 0)
{
// raycast did not hit an objects bounding box
return (false);
}
}
else
{
//LOG_ERROR << "Cannot raycast without RaySceneQuery instance" << ENDLOG;
return (false);
}
// at this point we have raycast to a series of different objects bounding boxes.
// we need to test these different objects to see which is the first polygon hit.
// there are some minor optimizations (distance based) that mean we wont have to
// check all of the objects most of the time, but the worst case scenario is that
// we need to test every triangle of every object.
//Ogre::Ogre::Real closest_distance = -1.0f;
closest_distance = -1.0f;
Ogre::Vector3 closest_result;
Ogre::RaySceneQueryResult &query_result = mRaySceneQuery->getLastResults();
#if 0
for (size_t qr_idx = 0; qr_idx < query_result.size(); qr_idx++)
{
const Ogre::RaySceneQueryResultEntry& result = query_result[qr_idx];
Ogre::Real distance = result.distance;
Ogre::MovableObject* movable = static_cast<Ogre::MovableObject*>(result.movable);
Ogre::SceneQuery::WorldFragment* worldFragment = result.worldFragment;
if (movable)
{
const Ogre::String& type = movable->getMovableType();
const Ogre::String& name = movable->getName();
const Ogre::String& parentName = movable->getParentNode()->getName();
Ogre::uint32 flag = movable->getQueryFlags();
if (type.compare("Entity") == 0)
{
Ogre::Entity* ent = (Ogre::Entity*)movable;
}
std::ostrstream oss;
oss<<"name:"<<name<<" distance:"<< distance <<" type:"<<type<<" flag:"<<flag<<" parent:"<<parentName<<std::endl;
OutputDebugString(oss.str() );
}
}
#endif
for (size_t qr_idx = 0; qr_idx < query_result.size(); qr_idx++)
{
// stop checking if we have found a raycast hit that is closer
// than all remaining entities
if ((closest_distance >= 0.0f) &&
(closest_distance < query_result[qr_idx].distance))
{
break;
}
// only check this result if its a hit against an entity
if ((query_result[qr_idx].movable != NULL) &&
(query_result[qr_idx].movable->getMovableType().compare("Entity") == 0))
{
// get the entity to check
Ogre::MovableObject *pentity = static_cast<Ogre::MovableObject*>(query_result[qr_idx].movable);
// mesh data to retrieve
size_t vertex_count;
size_t index_count;
Ogre::Vector3 *vertices = NULL;
Ogre::uint32 *indices = NULL;
// get the mesh information
GetMeshInformation(((Ogre::Entity*)pentity)->getMesh(), vertex_count, vertices, index_count, indices,
pentity->getParentNode()->_getDerivedPosition(),
pentity->getParentNode()->_getDerivedOrientation(),
pentity->getParentNode()->_getDerivedScale());
// test for hitting individual triangles on the mesh
bool new_closest_found = false;
for (size_t i = 0; i < index_count; i += 3)
{
// check for a hit against this triangle
std::pair<bool, Ogre::Real> hit = Ogre::Math::intersects(ray, vertices[indices[i]],
vertices[indices[i+1]], vertices[indices[i+2]], true, false);
// if it was a hit check if its the closest
if (hit.first)
{
if ((closest_distance < 0.0f) ||
(hit.second < closest_distance))
{
// this is the closest so far, save it off
closest_distance = hit.second;
new_closest_found = true;
}
}
}
// free the verticies and indicies memory
delete vertices;
delete indices;
// if we found a new closest raycast for this object, update the
// closest_result before moving on to the next object.
if (new_closest_found)
{
target = pentity;
closest_result = ray.getPoint(closest_distance);
}
}
}
// return the result
if (closest_distance >= 0.0f)
{
// raycast success
result = closest_result;
return (true);
}
else
{
// raycast failed
return (false);
}
}
void EntityWorldPickListener::processPickResult(bool& continuePicking, Ogre::RaySceneQueryResultEntry& entry, Ogre::Ray& cameraRay, const MousePickerArgs& mousePickerArgs)
{
if (!mContinuePickingThisContext) {
return;
}
if (entry.worldFragment) {
//this is terrain
//a position of -1, -1, -1 is not valid terrain
Ogre::SceneQuery::WorldFragment* wf = entry.worldFragment;
static const Ogre::Vector3 invalidPos(-1, -1, -1);
if (wf->singleIntersection != invalidPos) {
if (mFurthestPickingDistance == 0 || mResult.empty()) {
EntityPickResult result;
result.entity = findTerrainEntity();
result.position = wf->singleIntersection;
result.distance = entry.distance;
result.isTransparent = false;
mResult.push_back(result);
mContinuePickingThisContext = false;
} else {
if (entry.distance < mResult[mResult.size() - 1].distance) {
//If the last result is transparent, add another result, but if it's not replace it.
if (mResult.size() && !mResult[mResult.size() - 1].isTransparent) {
mResult.pop_back();
}
EntityPickResult result;
result.entity = findTerrainEntity();
result.position = wf->singleIntersection;
result.distance = entry.distance;
result.isTransparent = false;
mResult.push_back(result);
mContinuePickingThisContext = false;
}
}
}
/* std::stringstream ss;
ss << wf->singleIntersection;
S_LOG_VERBOSE("Picked in terrain: " << ss.str() << " distance: " << mResult.distance);*/
} else if (entry.movable) {
Ogre::MovableObject* pickedMovable = entry.movable;
if (pickedMovable->isVisible() && pickedMovable->getUserObjectBindings().getUserAny().getType() == typeid(EmberEntityUserObject::SharedPtr)) {
EmberEntityUserObject* anUserObject = Ogre::any_cast<EmberEntityUserObject::SharedPtr>(pickedMovable->getUserObjectBindings().getUserAny()).get();
//refit the opcode mesh to adjust for changes in the mesh (for example animations)
anUserObject->refit();
ICollisionDetector* collisionDetector = anUserObject->getCollisionDetector();
if (collisionDetector) {
CollisionResult collisionResult;
collisionResult.collided = false;
collisionResult.isTransparent = false;
collisionDetector->testCollision(cameraRay, collisionResult);
if (collisionResult.collided) {
if (mFurthestPickingDistance == 0) {
//If the current collision is transparent, also check for entities which are further away.
if (!collisionResult.isTransparent) {
//test all objects that fall into this distance
mFurthestPickingDistance = (pickedMovable->getParentNode()->_getDerivedPosition() - cameraRay.getOrigin()).length() + pickedMovable->getBoundingRadius();
}
} else {
if (collisionResult.distance > mFurthestPickingDistance) {
mContinuePickingThisContext = false;
return;
} else {
if (!mResult.empty() && mResult[mResult.size() - 1].distance > collisionResult.distance) {
//If the last result is transparent, add another result, but if it's not replace it.
if (!mResult[mResult.size() - 1].isTransparent) {
mResult.pop_back();
}
} else {
return;
}
}
}
EmberEntity& pickedEntity = anUserObject->getEmberEntity();
std::list<EmberEntity*> entities;
entities.push_front(&pickedEntity);
EmberEntity* entity = pickedEntity.getEmberLocation();
while (entity) {
if (entity->getCompositionMode() == EmberEntity::CM_COMPOSITION) {
entities.push_front(entity);
} else if (entity->getCompositionMode() == EmberEntity::CM_COMPOSITION_EXCLUSIVE) {
entities.clear();
entities.push_front(entity);
}
entity = entity->getEmberLocation();
}
for (std::list<EmberEntity*>::const_iterator I = entities.begin(); I != entities.end(); ++I) {
EntityPickResult result;
result.entity = *I;
result.position = collisionResult.position;
result.distance = collisionResult.distance;
result.isTransparent = collisionResult.isTransparent;
mResult.push_back(result);
}
}
}
}
}
}