void MetavoxelData::expand() {
for (QHash<AttributePointer, MetavoxelNode*>::iterator it = _roots.begin(); it != _roots.end(); it++) {
MetavoxelNode* newParent = new MetavoxelNode(it.key());
for (int i = 0; i < MetavoxelNode::CHILD_COUNT; i++) {
MetavoxelNode* newChild = new MetavoxelNode(it.key());
newParent->setChild(i, newChild);
int index = getOppositeIndex(i);
if (it.value()->isLeaf()) {
newChild->setChild(index, new MetavoxelNode(it.value()->getAttributeValue(it.key())));
} else {
MetavoxelNode* grandchild = it.value()->getChild(i);
grandchild->incrementReferenceCount();
newChild->setChild(index, grandchild);
}
for (int j = 1; j < MetavoxelNode::CHILD_COUNT; j++) {
MetavoxelNode* newGrandchild = new MetavoxelNode(it.key());
newChild->setChild((index + j) % MetavoxelNode::CHILD_COUNT, newGrandchild);
}
newChild->mergeChildren(it.key());
}
newParent->mergeChildren(it.key());
it.value()->decrementReferenceCount(it.key());
it.value() = newParent;
}
_size *= 2.0f;
}
MetavoxelNode* Attribute::expandMetavoxelRoot(const MetavoxelNode& root) {
AttributePointer attribute(this);
MetavoxelNode* newParent = new MetavoxelNode(attribute);
for (int i = 0; i < MetavoxelNode::CHILD_COUNT; i++) {
MetavoxelNode* newChild = new MetavoxelNode(attribute);
newParent->setChild(i, newChild);
int index = MetavoxelNode::getOppositeChildIndex(i);
if (root.isLeaf()) {
newChild->setChild(index, new MetavoxelNode(root.getAttributeValue(attribute)));
} else {
MetavoxelNode* grandchild = root.getChild(i);
grandchild->incrementReferenceCount();
newChild->setChild(index, grandchild);
}
for (int j = 1; j < MetavoxelNode::CHILD_COUNT; j++) {
MetavoxelNode* newGrandchild = new MetavoxelNode(attribute);
newChild->setChild((index + j) % MetavoxelNode::CHILD_COUNT, newGrandchild);
}
newChild->mergeChildren(attribute);
}
newParent->mergeChildren(attribute);
return newParent;
}
void DefaultMetavoxelGuide::guide(MetavoxelVisitation& visitation) {
visitation.info.isLeaf = visitation.allInputNodesLeaves();
bool keepGoing = visitation.visitor.visit(visitation.info);
for (int i = 0; i < visitation.outputNodes.size(); i++) {
AttributeValue& value = visitation.info.outputValues[i];
if (!value.getAttribute()) {
continue;
}
MetavoxelNode*& node = visitation.outputNodes[i];
if (node && node->isLeaf() && value.getAttribute()->equal(value.getValue(), node->getAttributeValue())) {
// "set" to same value; disregard
value = AttributeValue();
} else {
node = new MetavoxelNode(value);
}
}
if (!keepGoing) {
return;
}
MetavoxelVisitation nextVisitation = { &visitation, visitation.visitor,
QVector<MetavoxelNode*>(visitation.inputNodes.size()), QVector<MetavoxelNode*>(visitation.outputNodes.size()),
{ glm::vec3(), visitation.info.size * 0.5f, QVector<AttributeValue>(visitation.inputNodes.size()),
QVector<AttributeValue>(visitation.outputNodes.size()) } };
for (int i = 0; i < MetavoxelNode::CHILD_COUNT; i++) {
for (int j = 0; j < visitation.inputNodes.size(); j++) {
MetavoxelNode* node = visitation.inputNodes.at(j);
MetavoxelNode* child = node ? node->getChild(i) : NULL;
nextVisitation.info.inputValues[j] = ((nextVisitation.inputNodes[j] = child)) ?
child->getAttributeValue(visitation.info.inputValues[j].getAttribute()) :
visitation.info.inputValues[j];
}
for (int j = 0; j < visitation.outputNodes.size(); j++) {
MetavoxelNode* node = visitation.outputNodes.at(j);
MetavoxelNode* child = node ? node->getChild(i) : NULL;
nextVisitation.outputNodes[j] = child;
}
nextVisitation.info.minimum = visitation.info.minimum + glm::vec3(
(i & X_MAXIMUM_FLAG) ? nextVisitation.info.size : 0.0f,
(i & Y_MAXIMUM_FLAG) ? nextVisitation.info.size : 0.0f,
(i & Z_MAXIMUM_FLAG) ? nextVisitation.info.size : 0.0f);
static_cast<MetavoxelGuide*>(nextVisitation.info.inputValues.last().getInlineValue<
PolymorphicDataPointer>().data())->guide(nextVisitation);
for (int j = 0; j < nextVisitation.outputNodes.size(); j++) {
AttributeValue& value = nextVisitation.info.outputValues[j];
if (!value.getAttribute()) {
continue;
}
// replace the child
AttributeValue& parentValue = visitation.info.outputValues[j];
if (!parentValue.getAttribute()) {
// shallow-copy the parent node on first change
parentValue = value;
MetavoxelNode*& node = visitation.outputNodes[j];
if (node) {
node = new MetavoxelNode(value.getAttribute(), node);
} else {
// create leaf with inherited value
node = new MetavoxelNode(visitation.getInheritedOutputValue(j));
}
}
MetavoxelNode* node = visitation.outputNodes.at(j);
MetavoxelNode* child = node->getChild(i);
if (child) {
child->decrementReferenceCount(value.getAttribute());
} else {
// it's a leaf; we need to split it up
AttributeValue nodeValue = node->getAttributeValue(value.getAttribute());
for (int k = 1; k < MetavoxelNode::CHILD_COUNT; k++) {
node->setChild((i + k) % MetavoxelNode::CHILD_COUNT, new MetavoxelNode(nodeValue));
}
}
node->setChild(i, nextVisitation.outputNodes.at(j));
value = AttributeValue();
}
}
for (int i = 0; i < visitation.outputNodes.size(); i++) {
AttributeValue& value = visitation.info.outputValues[i];
if (value.getAttribute()) {
MetavoxelNode* node = visitation.outputNodes.at(i);
node->mergeChildren(value.getAttribute());
value = node->getAttributeValue(value.getAttribute());
}
}
}