voxelman/library/voxel_library_merger_pcm.cpp

/*
Copyright (c) 2019-2022 Péter Magyar

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

#include "voxel_library_merger_pcm.h"

#include "../../texture_packer/texture_packer.h"
#include "scene/resources/packed_scene.h"
#include "scene/resources/texture.h"

#ifdef PROPS_PRESENT
#include "../../props/props/prop_data.h"

#include "../../props/props/prop_data_prop.h"

#if MESH_DATA_RESOURCE_PRESENT
#include "../../mesh_data_resource/props/prop_data_mesh_data.h"
#endif
#endif

#include "voxel_material_cache_pcm.h"

#include "../defines.h"

#include "../world/default/voxel_chunk_default.h"

#include "core/hashfuncs.h"

bool VoxelLibraryMergerPCM::_supports_caching() {
	return true;
}

void VoxelLibraryMergerPCM::_material_cache_get_key(Ref<VoxelChunk> chunk) {
	uint8_t *ch = chunk->channel_get(VoxelChunkDefault::DEFAULT_CHANNEL_TYPE);

	if (!ch) {
		chunk->material_cache_key_set(0);
		chunk->material_cache_key_has_set(false);

		return;
	}

	Vector<uint8_t> surfaces;

	uint32_t size = chunk->get_data_size();

	for (uint32_t i = 0; i < size; ++i) {
		uint8_t v = ch[i];

		if (v == 0) {
			continue;
		}

		int ssize = surfaces.size();
		bool found = false;
		for (uint8_t j = 0; j < ssize; ++j) {
			if (surfaces[j] == v) {
				found = true;
				break;
			}
		}

		if (!found) {
			surfaces.push_back(v);
		}
	}

	if (surfaces.size() == 0) {
		chunk->material_cache_key_set(0);
		chunk->material_cache_key_has_set(false);

		return;
	}

	surfaces.sort();

	String hstr;

	for (int i = 0; i < surfaces.size(); ++i) {
		hstr += String::num(surfaces[i]) + "|";
	}

	int hash = static_cast<int>(hstr.hash());

	chunk->material_cache_key_set(hash);
	chunk->material_cache_key_has_set(true);

	_material_cache_mutex.lock();

	if (_material_cache.has(hash)) {
		Ref<VoxelMaterialCachePCM> cc = _material_cache[hash];

		if (cc.is_valid()) {
			cc->inc_ref_count();
		}

		_material_cache_mutex.unlock();

		return;
	}

	//print_error("New cache: " + hstr);

	Ref<VoxelMaterialCachePCM> cache;
	cache.instance();
	cache->inc_ref_count();

	cache->set_texture_flags(get_texture_flags());
	cache->set_max_atlas_size(get_max_atlas_size());
	cache->set_keep_original_atlases(get_keep_original_atlases());
	cache->set_background_color(get_background_color());
	cache->set_margin(get_margin());

	for (int i = 0; i < surfaces.size(); ++i) {
		int s = surfaces[i] - 1;

		if (_voxel_surfaces.size() <= s) {
			continue;
		}

		Ref<VoxelSurfaceMerger> ms = _voxel_surfaces[s];

		if (!ms.is_valid()) {
			continue;
		}

		Ref<VoxelSurfaceMerger> nms = ms->duplicate();
		nms->set_library(Ref<VoxelLibraryMergerPCM>(this));
		nms->set_id(s);

		cache->surface_add(nms);
	}

	for (int i = 0; i < _materials.size(); ++i) {
		Ref<Material> m = _materials[i];

		if (!m.is_valid()) {
			continue;
		}

		Ref<Material> nm = m->duplicate();

		cache->material_add(nm);
	}

	_material_cache[hash] = cache;

	//unlock here, so if a different thread need the cache it will be able to immediately access the materials and surfaces when it gets it.
	_material_cache_mutex.unlock();

	//this will generate the atlases
	cache->refresh_rects();
}

Ref<VoxelMaterialCache> VoxelLibraryMergerPCM::_material_cache_get(const int key) {
	_material_cache_mutex.lock();

	ERR_FAIL_COND_V(!_material_cache.has(key), Ref<VoxelMaterialCache>());

	Ref<VoxelMaterialCache> c = _material_cache[key];

	_material_cache_mutex.unlock();

	return c;
}

void VoxelLibraryMergerPCM::_material_cache_unref(const int key) {
	_material_cache_mutex.lock();

	if (!_material_cache.has(key)) {
		return;
	}

	Ref<VoxelMaterialCachePCM> cc = _material_cache[key];

	if (!cc.is_valid()) {
		return;
	}

	cc->dec_ref_count();

	if (cc->get_ref_count() <= 0) {
		_material_cache.erase(key);
	}

	_material_cache_mutex.unlock();
}

void VoxelLibraryMergerPCM::_prop_material_cache_get_key(Ref<VoxelChunk> chunk) {
	Vector<uint64_t> props;

/*
#ifdef PROPS_PRESENT
	for (int i = 0; i < chunk->prop_get_count(); ++i) {
		Ref<PropData> prop = chunk->prop_get(i);

		ERR_CONTINUE(!prop.is_valid());

		//get pointer's value as uint64
		uint64_t v = make_uint64_t<PropData *>(*prop);

		int psize = props.size();
		bool found = false;
		for (int j = 0; j < psize; ++j) {
			if (props[j] == v) {
				found = true;
				break;
			}
		}

		if (!found) {
			props.push_back(v);
		}
	}
#endif
*/

#if MESH_DATA_RESOURCE_PRESENT
	for (int i = 0; i < chunk->mesh_data_resource_get_count(); ++i) {
		Ref<Texture> tex = chunk->mesh_data_resource_get_texture(i);

		if (!tex.is_valid())
			continue;

		//get pointer's value as uint64
		uint64_t v = make_uint64_t<Texture *>(*tex);

		int psize = props.size();
		bool found = false;
		for (int j = 0; j < psize; ++j) {
			if (props[j] == v) {
				found = true;
				break;
			}
		}

		if (!found) {
			props.push_back(v);
		}
	}
#endif

	if (props.size() == 0) {
		chunk->prop_material_cache_key_set(0);
		chunk->prop_material_cache_key_has_set(false);

		return;
	}

	props.sort();

	String hstr;

	for (int i = 0; i < props.size(); ++i) {
		hstr += String::num_uint64(props[i]) + "|";
	}

	int hash = static_cast<int>(hstr.hash());

	chunk->prop_material_cache_key_set(hash);
	chunk->prop_material_cache_key_has_set(true);

	_prop_material_cache_mutex.lock();

	if (_prop_material_cache.has(hash)) {
		Ref<VoxelMaterialCachePCM> cc = _prop_material_cache[hash];

		if (cc.is_valid()) {
			cc->inc_ref_count();
		}

		_prop_material_cache_mutex.unlock();

		return;
	}

	//print_error("New prop cache: " + hstr);

	Ref<VoxelMaterialCachePCM> cache;
	cache.instance();
	cache->inc_ref_count();

	cache->set_texture_flags(get_texture_flags());
	cache->set_max_atlas_size(get_max_atlas_size());
	cache->set_keep_original_atlases(get_keep_original_atlases());
	cache->set_background_color(get_background_color());
	cache->set_margin(get_margin());

	for (int i = 0; i < _prop_materials.size(); ++i) {
		Ref<Material> m = _prop_materials[i];

		if (!m.is_valid()) {
			continue;
		}

		Ref<Material> nm = m->duplicate();

		cache->material_add(nm);
	}

/*
#ifdef PROPS_PRESENT
	for (int i = 0; i < chunk->prop_get_count(); ++i) {
		Ref<PropData> prop = chunk->prop_get(i);

		ERR_CONTINUE(!prop.is_valid());

		cache->prop_add_textures(prop);
	}
#endif
*/

#if MESH_DATA_RESOURCE_PRESENT
	for (int i = 0; i < chunk->mesh_data_resource_get_count(); ++i) {
		Ref<Texture> tex = chunk->mesh_data_resource_get_texture(i);

		if (!tex.is_valid())
			continue;

		cache->additional_texture_add(tex);
	}
#endif

	_prop_material_cache[hash] = cache;

	//unlock here, so if a different thread need the cache it will be able to immediately access the materials and surfaces when it gets it.
	_prop_material_cache_mutex.unlock();

	//this will generate the atlases
	cache->refresh_rects();
}
Ref<VoxelMaterialCache> VoxelLibraryMergerPCM::_prop_material_cache_get(const int key) {
	_prop_material_cache_mutex.lock();

	ERR_FAIL_COND_V(!_prop_material_cache.has(key), Ref<VoxelMaterialCache>());

	Ref<VoxelMaterialCache> c = _prop_material_cache[key];

	_prop_material_cache_mutex.unlock();

	return c;
}
void VoxelLibraryMergerPCM::_prop_material_cache_unref(const int key) {
	_prop_material_cache_mutex.lock();

	if (!_prop_material_cache.has(key)) {
		return;
	}

	Ref<VoxelMaterialCachePCM> cc = _prop_material_cache[key];

	if (!cc.is_valid()) {
		return;
	}

	cc->dec_ref_count();

	if (cc->get_ref_count() <= 0) {
		_prop_material_cache.erase(key);
	}

	_prop_material_cache_mutex.unlock();
}

int VoxelLibraryMergerPCM::get_texture_flags() const {
	return _packer->get_texture_flags();
}
void VoxelLibraryMergerPCM::set_texture_flags(const int flags) {
	_packer->set_texture_flags(flags);
	_prop_packer->set_texture_flags(flags);
}

int VoxelLibraryMergerPCM::get_max_atlas_size() const {
	return _packer->get_max_atlas_size();
}
void VoxelLibraryMergerPCM::set_max_atlas_size(const int size) {
	_packer->set_max_atlas_size(size);
	_prop_packer->set_max_atlas_size(size);
}

bool VoxelLibraryMergerPCM::get_keep_original_atlases() const {
	return _packer->get_keep_original_atlases();
}
void VoxelLibraryMergerPCM::set_keep_original_atlases(const bool value) {
	_packer->set_keep_original_atlases(value);
	_prop_packer->set_keep_original_atlases(value);
}

Color VoxelLibraryMergerPCM::get_background_color() const {
	return _packer->get_background_color();
}
void VoxelLibraryMergerPCM::set_background_color(const Color &color) {
	_packer->set_background_color(color);
	_prop_packer->set_background_color(color);
}

int VoxelLibraryMergerPCM::get_margin() const {
	return _packer->get_margin();
}
void VoxelLibraryMergerPCM::set_margin(const int margin) {
	_packer->set_margin(margin);
	_prop_packer->set_margin(margin);
}

//Surfaces
Ref<VoxelSurface> VoxelLibraryMergerPCM::voxel_surface_get(const int index) {
	ERR_FAIL_INDEX_V(index, _voxel_surfaces.size(), Ref<VoxelSurface>(NULL));

	return _voxel_surfaces[index];
}

void VoxelLibraryMergerPCM::voxel_surface_add(Ref<VoxelSurface> value) {
	ERR_FAIL_COND(!value.is_valid());

	value->set_library(Ref<VoxelLibraryMergerPCM>(this));
	value->set_id(_voxel_surfaces.size());

	_voxel_surfaces.push_back(value);
}

void VoxelLibraryMergerPCM::voxel_surface_set(const int index, Ref<VoxelSurface> value) {
	ERR_FAIL_COND(index < 0);

	if (_voxel_surfaces.size() < index) {
		_voxel_surfaces.resize(index + 1);
	}

	if (_voxel_surfaces[index].is_valid()) {
		_voxel_surfaces.get(index)->set_library(Ref<VoxelLibraryMergerPCM>(NULL));
	}

	if (value.is_valid()) {
		value->set_library(Ref<VoxelLibraryMergerPCM>(this));

		_voxel_surfaces.set(index, value);
	}
}

void VoxelLibraryMergerPCM::voxel_surface_remove(const int index) {
	_voxel_surfaces.remove(index);
}

int VoxelLibraryMergerPCM::voxel_surface_get_num() const {
	return _voxel_surfaces.size();
}

void VoxelLibraryMergerPCM::voxel_surfaces_clear() {
	_packer->clear();

	for (int i = 0; i < _voxel_surfaces.size(); i++) {
		Ref<VoxelSurfaceMerger> surface = _voxel_surfaces[i];

		if (surface.is_valid()) {
			surface->set_library(NULL);
		}
	}

	_voxel_surfaces.clear();
}

Vector<Variant> VoxelLibraryMergerPCM::get_voxel_surfaces() {
	VARIANT_ARRAY_GET(_voxel_surfaces);
}

void VoxelLibraryMergerPCM::set_voxel_surfaces(const Vector<Variant> &surfaces) {
	_voxel_surfaces.clear();

	for (int i = 0; i < surfaces.size(); i++) {
		Ref<VoxelSurfaceMerger> surface = Ref<VoxelSurfaceMerger>(surfaces[i]);

		if (surface.is_valid()) {
			surface->set_library(Ref<VoxelLibraryMergerPCM>(this));
		}

		_voxel_surfaces.push_back(surface);
	}
}

#ifdef PROPS_PRESENT
Ref<PropData> VoxelLibraryMergerPCM::get_prop(const int index) {
	ERR_FAIL_INDEX_V(index, _props.size(), Ref<PropData>());

	return _props[index];
}
void VoxelLibraryMergerPCM::add_prop(Ref<PropData> value) {
	_props.push_back(value);
}
bool VoxelLibraryMergerPCM::has_prop(const Ref<PropData> &value) const {
	return _props.find(value) != -1;
}
void VoxelLibraryMergerPCM::set_prop(const int index, const Ref<PropData> &value) {
	ERR_FAIL_INDEX(index, _props.size());

	_props.write[index] = value;
}
void VoxelLibraryMergerPCM::remove_prop(const int index) {
	ERR_FAIL_INDEX(index, _props.size());

	_props.remove(index);
}
int VoxelLibraryMergerPCM::get_num_props() const {
	return _props.size();
}
void VoxelLibraryMergerPCM::clear_props() {
	_props.clear();
}

Vector<Variant> VoxelLibraryMergerPCM::get_props() {
	VARIANT_ARRAY_GET(_props);
}

void VoxelLibraryMergerPCM::set_props(const Vector<Variant> &props) {
	VARIANT_ARRAY_SET(props, _props, PropData);
}

Rect2 VoxelLibraryMergerPCM::get_prop_uv_rect(const Ref<Texture> &texture) {
	if (!texture.is_valid()) {
		return Rect2(0, 0, 1, 1);
	}

	Ref<AtlasTexture> at = _prop_packer->get_texture(texture);

	if (!at.is_valid()) {
		return Rect2(0, 0, 1, 1);
	}

	Rect2 region = at->get_region();

	Ref<Texture> tex = at->get_atlas();

	if (!tex.is_valid()) {
		return Rect2(0, 0, 1, 1);
	}

	Ref<Image> image = tex->get_data();

	if (!image.is_valid()) {
		return Rect2(0, 0, 1, 1);
	}

	float w = image->get_width();
	float h = image->get_height();

	region.position = Size2(region.position.x / w, region.position.y / h);
	region.size = Size2(region.size.x / w, region.size.y / h);

	return region;
}

Ref<TexturePacker> VoxelLibraryMergerPCM::get_prop_packer() {
	return _prop_packer;
}
#endif

void VoxelLibraryMergerPCM::refresh_rects() {
	bool texture_added = false;
	for (int i = 0; i < _voxel_surfaces.size(); i++) {
		Ref<VoxelSurfaceMerger> surface = Ref<VoxelSurfaceMerger>(_voxel_surfaces[i]);

		if (surface.is_valid()) {
			for (int j = 0; j < VoxelSurface::VOXEL_SIDES_COUNT; ++j) {
				Ref<Texture> tex = surface->get_texture(static_cast<VoxelSurface::VoxelSurfaceSides>(j));

				if (!tex.is_valid())
					continue;

				if (!_packer->contains_texture(tex)) {
					texture_added = true;
					surface->set_region(static_cast<VoxelSurface::VoxelSurfaceSides>(j), _packer->add_texture(tex));
				} else {
					surface->set_region(static_cast<VoxelSurface::VoxelSurfaceSides>(j), _packer->get_texture(tex));
				}
			}
		}
	}

	if (texture_added) {
		_packer->merge();

		ERR_FAIL_COND(_packer->get_texture_count() == 0);

		Ref<Texture> tex = _packer->get_generated_texture(0);

		setup_material_albedo(MATERIAL_INDEX_VOXELS, tex);
		setup_material_albedo(MATERIAL_INDEX_LIQUID, tex);
	}

#ifdef PROPS_PRESENT
	//todo add this back
	//texture_added = false;
	for (int i = 0; i < _props.size(); i++) {
		Ref<PropData> prop = _props.get(i);

		if (prop.is_valid()) {
			if (process_prop_textures(prop))
				texture_added = true;
		}
	}

	//if (texture_added) {
	if (_prop_packer->get_texture_count() > 0) {
		_prop_packer->merge();

		//ERR_FAIL_COND(_prop_packer->get_texture_count() == 0);

		Ref<Texture> tex = _prop_packer->get_generated_texture(0);

		setup_material_albedo(MATERIAL_INDEX_PROP, tex);
	}
#endif

	for (int i = 0; i < _voxel_surfaces.size(); i++) {
		Ref<VoxelSurfaceMerger> surface = _voxel_surfaces[i];

		if (surface.is_valid()) {
			surface->refresh_rects();
		}
	}

	set_initialized(true);
}

void VoxelLibraryMergerPCM::_setup_material_albedo(const int material_index, const Ref<Texture> &texture) {
	Ref<SpatialMaterial> mat;

	int count = 0;

	switch (material_index) {
		case MATERIAL_INDEX_VOXELS:
			count = material_get_num();
			break;
		case MATERIAL_INDEX_LIQUID:
			count = liquid_material_get_num();
			break;
		case MATERIAL_INDEX_PROP:
			count = prop_material_get_num();
			break;
	}

	for (int i = 0; i < count; ++i) {
		switch (material_index) {
			case MATERIAL_INDEX_VOXELS:
				mat = material_get(i);
				break;
			case MATERIAL_INDEX_LIQUID:
				mat = liquid_material_get(i);
				break;
			case MATERIAL_INDEX_PROP:
				mat = prop_material_get(i);
				break;
		}

		Ref<SpatialMaterial> spmat;

		switch (material_index) {
			case MATERIAL_INDEX_VOXELS:
				spmat = material_get(i);
				break;
			case MATERIAL_INDEX_LIQUID:
				spmat = liquid_material_get(i);
				break;
			case MATERIAL_INDEX_PROP:
				spmat = prop_material_get(i);
				break;
		}

		if (spmat.is_valid()) {
			spmat->set_texture(SpatialMaterial::TEXTURE_ALBEDO, texture);
			return;
		}

		Ref<ShaderMaterial> shmat;

		switch (material_index) {
			case MATERIAL_INDEX_VOXELS:
				shmat = material_get(i);
				break;
			case MATERIAL_INDEX_LIQUID:
				shmat = liquid_material_get(i);
				break;
			case MATERIAL_INDEX_PROP:
				shmat = prop_material_get(i);
				break;
		}

		if (shmat.is_valid()) {
			shmat->set_shader_param("texture_albedo", texture);
		}
	}
}

VoxelLibraryMergerPCM::VoxelLibraryMergerPCM() {
	_packer.instance();

#if GODOT4
#warning implement
#else
	_packer->set_texture_flags(Texture::FLAG_MIPMAPS | Texture::FLAG_FILTER);
#endif

	_packer->set_max_atlas_size(1024);
	_packer->set_keep_original_atlases(false);
	_packer->set_margin(0);

	_prop_packer.instance();

#if GODOT4
#warning implement
#else
	_prop_packer->set_texture_flags(Texture::FLAG_MIPMAPS | Texture::FLAG_FILTER);
#endif

	_prop_packer->set_max_atlas_size(1024);
	_prop_packer->set_keep_original_atlases(false);
	_prop_packer->set_margin(0);
}

VoxelLibraryMergerPCM::~VoxelLibraryMergerPCM() {
	for (int i = 0; i < _voxel_surfaces.size(); ++i) {
		Ref<VoxelSurface> surface = _voxel_surfaces[i];

		if (surface.is_valid()) {
			surface->set_library(Ref<VoxelLibraryMergerPCM>());
		}
	}

	_voxel_surfaces.clear();

	_packer->clear();
	_packer.unref();

	_prop_packer->clear();
	_prop_packer.unref();
}

#ifdef PROPS_PRESENT
bool VoxelLibraryMergerPCM::process_prop_textures(Ref<PropData> prop) {
	if (!prop.is_valid()) {
		return false;
	}

	bool texture_added = false;

	for (int i = 0; i < prop->get_prop_count(); ++i) {
		Ref<PropDataMeshData> pdm = prop->get_prop(i);

		if (pdm.is_valid()) {
			Ref<Texture> tex = pdm->get_texture();

			if (!tex.is_valid())
				continue;

			if (!_prop_packer->contains_texture(tex)) {
				_prop_packer->add_texture(tex);
				texture_added = true;
			}
		}

		Ref<PropDataProp> pdp = prop->get_prop(i);

		if (pdp.is_valid()) {
			if (process_prop_textures(pdp))
				texture_added = true;
		}
	}

	return texture_added;
}
#endif

void VoxelLibraryMergerPCM::_bind_methods() {
	ClassDB::bind_method(D_METHOD("get_texture_flags"), &VoxelLibraryMergerPCM::get_texture_flags);
	ClassDB::bind_method(D_METHOD("set_texture_flags", "flags"), &VoxelLibraryMergerPCM::set_texture_flags);
	ADD_PROPERTY(PropertyInfo(Variant::INT, "texture_flags", PROPERTY_HINT_FLAGS, "Mipmaps,Repeat,Filter,Anisotropic Linear,Convert to Linear,Mirrored Repeat,Video Surface"), "set_texture_flags", "get_texture_flags");

	ClassDB::bind_method(D_METHOD("get_max_atlas_size"), &VoxelLibraryMergerPCM::get_max_atlas_size);
	ClassDB::bind_method(D_METHOD("set_max_atlas_size", "size"), &VoxelLibraryMergerPCM::set_max_atlas_size);
	ADD_PROPERTY(PropertyInfo(Variant::INT, "max_atlas_size"), "set_max_atlas_size", "get_max_atlas_size");

	ClassDB::bind_method(D_METHOD("get_keep_original_atlases"), &VoxelLibraryMergerPCM::get_keep_original_atlases);
	ClassDB::bind_method(D_METHOD("set_keep_original_atlases", "value"), &VoxelLibraryMergerPCM::set_keep_original_atlases);
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "keep_original_atlases"), "set_keep_original_atlases", "get_keep_original_atlases");

	ClassDB::bind_method(D_METHOD("get_background_color"), &VoxelLibraryMergerPCM::get_background_color);
	ClassDB::bind_method(D_METHOD("set_background_color", "color"), &VoxelLibraryMergerPCM::set_background_color);
	ADD_PROPERTY(PropertyInfo(Variant::COLOR, "background_color"), "set_background_color", "get_background_color");

	ClassDB::bind_method(D_METHOD("get_margin"), &VoxelLibraryMergerPCM::get_margin);
	ClassDB::bind_method(D_METHOD("set_margin", "size"), &VoxelLibraryMergerPCM::set_margin);
	ADD_PROPERTY(PropertyInfo(Variant::INT, "margin"), "set_margin", "get_margin");

	ClassDB::bind_method(D_METHOD("get_voxel_surfaces"), &VoxelLibraryMergerPCM::get_voxel_surfaces);
	ClassDB::bind_method(D_METHOD("set_voxel_surfaces"), &VoxelLibraryMergerPCM::set_voxel_surfaces);
	ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "voxel_surfaces", PROPERTY_HINT_NONE, "17/17:VoxelSurfaceMerger", PROPERTY_USAGE_DEFAULT, "VoxelSurfaceMerger"), "set_voxel_surfaces", "get_voxel_surfaces");

#ifdef PROPS_PRESENT
	ClassDB::bind_method(D_METHOD("get_props"), &VoxelLibraryMergerPCM::get_props);
	ClassDB::bind_method(D_METHOD("set_props"), &VoxelLibraryMergerPCM::set_props);
	ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "props", PROPERTY_HINT_NONE, "17/17:PropData", PROPERTY_USAGE_DEFAULT, "PropData"), "set_props", "get_props");

	ClassDB::bind_method(D_METHOD("get_prop_uv_rect", "texture"), &VoxelLibraryMergerPCM::get_prop_uv_rect);

	ClassDB::bind_method(D_METHOD("get_prop_packer"), &VoxelLibraryMergerPCM::get_prop_packer);
#endif

	ClassDB::bind_method(D_METHOD("_setup_material_albedo", "material_index", "texture"), &VoxelLibraryMergerPCM::_setup_material_albedo);
}