void DiffTraversal::Waypoint::getNextVisibleElementRepeat(
DiffTraversal::VisibleElement& next, const DiffTraversal::View& view, uint64_t lastTime) {
if (_nextIndex == -1) {
// root case is special
++_nextIndex;
EntityTreeElementPointer element = _weakElement.lock();
if (element->getLastChangedContent() > lastTime) {
next.element = element;
return;
}
}
if (_nextIndex < NUMBER_OF_CHILDREN) {
EntityTreeElementPointer element = _weakElement.lock();
if (element) {
while (_nextIndex < NUMBER_OF_CHILDREN) {
EntityTreeElementPointer nextElement = element->getChildAtIndex(_nextIndex);
++_nextIndex;
if (nextElement &&
nextElement->getLastChanged() > lastTime &&
view.shouldTraverseElement(*nextElement)) {
next.element = nextElement;
return;
}
}
}
}
next.element.reset();
}
void DiffTraversal::Waypoint::getNextVisibleElementRepeat(
DiffTraversal::VisibleElement& next, const DiffTraversal::View& view, uint64_t lastTime) {
if (_nextIndex == -1) {
// root case is special
++_nextIndex;
EntityTreeElementPointer element = _weakElement.lock();
if (element->getLastChangedContent() > lastTime) {
next.element = element;
next.intersection = ViewFrustum::INTERSECT;
return;
}
}
if (_nextIndex < NUMBER_OF_CHILDREN) {
EntityTreeElementPointer element = _weakElement.lock();
if (element) {
while (_nextIndex < NUMBER_OF_CHILDREN) {
EntityTreeElementPointer nextElement = element->getChildAtIndex(_nextIndex);
++_nextIndex;
if (nextElement && nextElement->getLastChanged() > lastTime) {
if (!view.usesViewFrustum) {
// No LOD truncation if we aren't using the view frustum
next.element = nextElement;
next.intersection = ViewFrustum::INSIDE;
return;
} else {
// check for LOD truncation
float distance = glm::distance(view.viewFrustum.getPosition(), nextElement->getAACube().calcCenter()) + MIN_VISIBLE_DISTANCE;
float angularDiameter = nextElement->getAACube().getScale() / distance;
if (angularDiameter > MIN_ELEMENT_ANGULAR_DIAMETER * view.lodScaleFactor) {
ViewFrustum::intersection intersection = view.viewFrustum.calculateCubeKeyholeIntersection(nextElement->getAACube());
if (intersection != ViewFrustum::OUTSIDE) {
next.element = nextElement;
next.intersection = intersection;
return;
}
}
}
}
}
}
}
next.element.reset();
next.intersection = ViewFrustum::OUTSIDE;
}
