AABBTree* CollisionManager::getAABBTree(SceneObject* scno, int collisionBlockFlags) {
SharedObjectTemplate* templateObject = scno->getObjectTemplate();
if (templateObject == NULL)
return NULL;
if (!(templateObject->getCollisionActionBlockFlags() & collisionBlockFlags))
return NULL;
PortalLayout* portalLayout = templateObject->getPortalLayout();
MeshAppearanceTemplate* mesh = NULL;
if (portalLayout != NULL) {
mesh = portalLayout->getMeshAppearanceTemplate(0);
} else {
AppearanceTemplate* appTemplate = templateObject->getAppearanceTemplate();
if (appTemplate == NULL)
return NULL;
mesh = dynamic_cast<MeshAppearanceTemplate*>(appTemplate->getFirstMesh());
}
if (mesh == NULL)
return NULL;
return mesh->getAABBTree();
}
bool CollisionManager::checkLineOfSightWorldToCell(const Vector3& rayOrigin, const Vector3& rayEnd, float distance, CellObject* cellObject) {
ManagedReference<SceneObject*> building = cellObject->getParent();
if (building == NULL)
return true;
SharedObjectTemplate* objectTemplate = building->getObjectTemplate();
PortalLayout* portalLayout = objectTemplate->getPortalLayout();
if (portalLayout == NULL)
return true;
Ray ray = convertToModelSpace(rayOrigin, rayEnd, building);
if (cellObject->getCellNumber() >= portalLayout->getAppearanceTemplatesSize())
return true;
MeshAppearanceTemplate* app = portalLayout->getMeshAppearanceTemplate(cellObject->getCellNumber());
AABBTree* aabbTree = app->getAABBTree();
if (aabbTree == NULL)
return true;
float intersectionDistance;
Triangle* triangle = NULL;
if (aabbTree->intersects(ray, distance, intersectionDistance, triangle, true))
return false;
return true;
}
bool CollisionManager::checkLineOfSightInParentCell(SceneObject* object, Vector3& endPoint) {
ManagedReference<SceneObject*> parent = object->getParent();
if (parent == NULL || !parent->isCellObject())
return true;
CellObject* cell = cast<CellObject*>( parent.get());
SharedObjectTemplate* objectTemplate = parent->getRootParent().get()->getObjectTemplate();
PortalLayout* portalLayout = objectTemplate->getPortalLayout();
MeshAppearanceTemplate* appearanceMesh = NULL;
if (portalLayout == NULL)
return true;
try {
appearanceMesh = portalLayout->getMeshAppearanceTemplate(cell->getCellNumber());
} catch (Exception& e) {
return true;
}
if (appearanceMesh == NULL) {
//info("null appearance mesh ");
return true;
}
AABBTree* aabbTree = appearanceMesh->getAABBTree();
if (aabbTree == NULL)
return true;
//switching Y<->Z, adding 0.1 to account floor
Vector3 startPoint = object->getPosition();
startPoint.set(startPoint.getX(), startPoint.getY(), startPoint.getZ() + 0.1f);
endPoint.set(endPoint.getX(), endPoint.getY(), endPoint.getZ() + 0.1f);
Vector3 dir = endPoint - startPoint;
dir.normalize();
float distance = endPoint.distanceTo(startPoint);
float intersectionDistance;
Ray ray(startPoint, dir);
Triangle* triangle = NULL;
//nothing in the middle
if (aabbTree->intersects(ray, distance, intersectionDistance, triangle, true))
return false;
Ray ray2(endPoint, Vector3(0, -1, 0));
//check if we are in the cell with dir (0, -1, 0)
if (!aabbTree->intersects(ray2, 64000.f, intersectionDistance, triangle, true))
return false;
return true;
}
bool CollisionManager::checkLineOfSightInBuilding(SceneObject* object1, SceneObject* object2, SceneObject* building) {
SharedObjectTemplate* objectTemplate = building->getObjectTemplate();
PortalLayout* portalLayout = objectTemplate->getPortalLayout();
if (portalLayout == NULL)
return true;
//we are in model space... in cells
Vector3 rayOrigin = object1->getPosition();
rayOrigin.set(rayOrigin.getX(), rayOrigin.getY(), rayOrigin.getZ() + 1.f);
Vector3 rayEnd = object2->getPosition();
rayEnd.set(rayEnd.getX(), rayEnd.getY(), rayEnd.getZ() + 1.f);
Vector3 direction(Vector3(rayEnd - rayOrigin));
direction.normalize();
float distance = rayEnd.distanceTo(rayOrigin);
float intersectionDistance;
Ray ray(rayOrigin, direction);
Triangle* triangle = NULL;
// we check interior cells
for (int i = 1; i < portalLayout->getAppearanceTemplatesSize(); ++i) {
MeshAppearanceTemplate* app = portalLayout->getMeshAppearanceTemplate(i);
AABBTree* aabbTree = app->getAABBTree();
if (aabbTree == NULL)
continue;
if (aabbTree->intersects(ray, distance, intersectionDistance, triangle, true))
return false;
}
return true;
}
