Mirrors/overte-HifiExperiments
3
0
Fork 0
mirror of https://github.com/HifiExperiments/overte.git synced 2025-08-17 10:41:42 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

Starting on delta encoding.

Browse source
This commit is contained in:
Andrzej Kapolka 2013-12-19 18:03:49 -08:00
parent f2ebd76362
commit 11e729c3cc
3 changed files with 62 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
libraries/metavoxels/src/AttributeRegistry.h
View file

@ -141,6 +141,9 @@ public:
virtual void read(Bitstream& in, void*& value, bool isLeaf) const = 0;
virtual void write(Bitstream& out, void* value, bool isLeaf) const = 0;
virtual void readDelta(Bitstream& in, void*& value, void* reference, bool isLeaf) const { read(in, value, isLeaf); }
virtual void writeDelta(Bitstream& out, void* value, void* reference, bool isLeaf) const { write(out, value, isLeaf); }
virtual bool equal(void* first, void* second) const = 0;
/// Merges the value of a parent and its children.

53
libraries/metavoxels/src/MetavoxelData.cpp
View file

@ -98,6 +98,12 @@ void MetavoxelData::write(Bitstream& out) const {
}
}
void MetavoxelData::readDelta(const MetavoxelData& reference, Bitstream& in) {
}
void MetavoxelData::writeDelta(const MetavoxelData& reference, Bitstream& out) const {
}
MetavoxelNode::MetavoxelNode(const AttributeValue& attributeValue) {
_attributeValue = attributeValue.copy();
for (int i = 0; i < CHILD_COUNT; i++) {
@ -183,6 +189,53 @@ void MetavoxelNode::write(const AttributePointer& attribute, Bitstream& out) con
}
}
void MetavoxelNode::readDelta(const AttributePointer& attribute, const MetavoxelNode& reference, Bitstream& in) {
bool different;
in >> different;
if (!different) {
return;
}
bool leaf;
in >> leaf;
attribute->readDelta(in, _attributeValue, reference._attributeValue, leaf);
if (leaf) {
clearChildren(attribute);
} else {
if (reference.isLeaf()) {
for (int i = 0; i < CHILD_COUNT; i++) {
_children[i]->read(attribute, in);
}
} else {
for (int i = 0; i < CHILD_COUNT; i++) {
_children[i]->readDelta(attribute, *reference._children[i], in);
}
}
}
}
void MetavoxelNode::writeDelta(const AttributePointer& attribute, const MetavoxelNode& reference, Bitstream& out) const {
if (this == &reference) {
out << false;
return;
}
out << true;
bool leaf = isLeaf();
out << leaf;
attribute->writeDelta(out, _attributeValue, reference._attributeValue, leaf);
if (!leaf) {
if (reference.isLeaf()) {
for (int i = 0; i < CHILD_COUNT; i++) {
_children[i]->write(attribute, out);
}
} else {
for (int i = 0; i < CHILD_COUNT; i++) {
_children[i]->writeDelta(attribute, *reference._children[i], out);
}
}
}
}
void MetavoxelNode::destroy(const AttributePointer& attribute) {
attribute->destroy(_attributeValue);
for (int i = 0; i < CHILD_COUNT; i++) {

6
libraries/metavoxels/src/MetavoxelData.h
View file

@ -44,6 +44,9 @@ public:
void read(Bitstream& in);
void write(Bitstream& out) const;
void readDelta(const MetavoxelData& reference, Bitstream& in);
void writeDelta(const MetavoxelData& reference, Bitstream& out) const;
private:
QHash<AttributePointer, MetavoxelNode*> _roots;
@ -75,6 +78,9 @@ public:
void read(const AttributePointer& attribute, Bitstream& in);
void write(const AttributePointer& attribute, Bitstream& out) const;
void readDelta(const AttributePointer& attribute, const MetavoxelNode& reference, Bitstream& in);
void writeDelta(const AttributePointer& attribute, const MetavoxelNode& reference, Bitstream& out) const;
void destroy(const AttributePointer& attribute);
private: