/*
Copyright (c) 2019-2021 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 "prop_mesher_2d.h"

#include "lights/prop_light_2d.h"
#include "modules/opensimplex/open_simplex_noise.h"

#include "material_cache/prop_material_cache_2d.h"
#include "tiled_wall/tiled_wall_data_2d.h"

const String PropMesher2D::BINDING_STRING_BUILD_FLAGS = "Use Lighting,Use AO,Use RAO,Bake Lights";

bool PropMesher2D::Vertex::operator==(const Vertex &p_vertex) const {
	if (vertex != p_vertex.vertex)
		return false;

	if (uv != p_vertex.uv)
		return false;

	if (uv2 != p_vertex.uv2)
		return false;

	if (normal != p_vertex.normal)
		return false;

	if (binormal != p_vertex.binormal)
		return false;

	if (color != p_vertex.color)
		return false;

	if (bones.size() != p_vertex.bones.size())
		return false;

	for (int i = 0; i < bones.size(); i++) {
		if (bones[i] != p_vertex.bones[i])
			return false;
	}

	for (int i = 0; i < weights.size(); i++) {
		if (weights[i] != p_vertex.weights[i])
			return false;
	}

	return true;
}

uint32_t PropMesher2D::VertexHasher::hash(const Vertex &p_vtx) {
	uint32_t h = hash_djb2_buffer((const uint8_t *)&p_vtx.vertex, sizeof(real_t) * 3);
	h = hash_djb2_buffer((const uint8_t *)&p_vtx.normal, sizeof(real_t) * 3, h);
	h = hash_djb2_buffer((const uint8_t *)&p_vtx.binormal, sizeof(real_t) * 3, h);
	h = hash_djb2_buffer((const uint8_t *)&p_vtx.tangent, sizeof(real_t) * 3, h);
	h = hash_djb2_buffer((const uint8_t *)&p_vtx.uv, sizeof(real_t) * 2, h);
	h = hash_djb2_buffer((const uint8_t *)&p_vtx.uv2, sizeof(real_t) * 2, h);
	h = hash_djb2_buffer((const uint8_t *)&p_vtx.color, sizeof(real_t) * 4, h);
	h = hash_djb2_buffer((const uint8_t *)p_vtx.bones.ptr(), p_vtx.bones.size() * sizeof(int), h);
	h = hash_djb2_buffer((const uint8_t *)p_vtx.weights.ptr(), p_vtx.weights.size() * sizeof(float), h);
	return h;
}

int PropMesher2D::get_channel_index_type() const {
	return _channel_index_type;
}
void PropMesher2D::set_channel_index_type(const int value) {
	_channel_index_type = value;
}

int PropMesher2D::get_channel_index_isolevel() const {
	return _channel_index_isolevel;
}
void PropMesher2D::set_channel_index_isolevel(const int value) {
	_channel_index_isolevel = value;
}

int PropMesher2D::get_mesher_index() const {
	return _mesher_index;
}
void PropMesher2D::set_mesher_index(const int value) {
	_mesher_index = value;
}

int PropMesher2D::get_format() const {
	return _format;
}
void PropMesher2D::set_format(const int value) {
	_format = value;
}

int PropMesher2D::get_texture_scale() const {
	return _texture_scale;
}
void PropMesher2D::set_texture_scale(const int value) {
	_texture_scale = value;
}

Ref<Material> PropMesher2D::get_material() {
	return _material;
}
void PropMesher2D::set_material(const Ref<Material> &material) {
	_material = material;
}

float PropMesher2D::get_ao_strength() const {
	return _ao_strength;
}
void PropMesher2D::set_ao_strength(float value) {
	_ao_strength = value;
}

float PropMesher2D::get_base_light_value() const {
	return _base_light_value;
}
void PropMesher2D::set_base_light_value(float value) {
	_base_light_value = value;
}

float PropMesher2D::get_voxel_scale() const {
	return _voxel_scale;
}
void PropMesher2D::set_voxel_scale(const float voxel_scale) {
	_voxel_scale = voxel_scale;
}

Rect2 PropMesher2D::get_uv_margin() const {
	return _uv_margin;
}
void PropMesher2D::set_uv_margin(const Rect2 margin) {
	_uv_margin = margin;
}

_FORCE_INLINE_ int PropMesher2D::get_build_flags() const {
	return _build_flags;
}
_FORCE_INLINE_ void PropMesher2D::set_build_flags(const int flags) {
	_build_flags = flags;

	if ((_build_flags & PropMesher2D::BUILD_FLAG_USE_LIGHTING) != 0) {
		_format |= VisualServer::ARRAY_FORMAT_COLOR;
	} else {
		_format ^= VisualServer::ARRAY_FORMAT_COLOR;
	}
}

Array PropMesher2D::build_mesh() {
	Array a;
	a.resize(VisualServer::ARRAY_MAX);

	if (_vertices.size() == 0) {
		//Nothing to do
		return a;
	}

	{
		PoolVector<Vector3> array;
		array.resize(_vertices.size());
#if !GODOT4
		PoolVector<Vector3>::Write w = array.write();
#endif

		for (int i = 0; i < _vertices.size(); ++i) {
#if !GODOT4
			w[i] = _vertices[i].vertex;
#else
			array.set(i, _vertices[i].vertex);
#endif
		}

#if !GODOT4
		w.release();
#endif

		a[VisualServer::ARRAY_VERTEX] = array;
	}

	if ((_format & VisualServer::ARRAY_FORMAT_NORMAL) == 0) {
		generate_normals();
	}

	{
		PoolVector<Vector3> array;
		array.resize(_vertices.size());
#if !GODOT4
		PoolVector<Vector3>::Write w = array.write();
#endif

		for (int i = 0; i < _vertices.size(); ++i) {
#if !GODOT4
			w[i] = _vertices[i].normal;
#else
			array.set(i, _vertices[i].normal);
#endif
		}

#if !GODOT4
		w.release();
#endif
		a[VisualServer::ARRAY_NORMAL] = array;
	}

	if ((_format & VisualServer::ARRAY_FORMAT_COLOR) != 0) {
		PoolVector<Color> array;
		array.resize(_vertices.size());
#if !GODOT4
		PoolVector<Color>::Write w = array.write();
#endif

		for (int i = 0; i < _vertices.size(); ++i) {
#if !GODOT4
			w[i] = _vertices[i].color;
#else
			array.set(i, _vertices[i].color);
#endif
		}

#if !GODOT4
		w.release();
#endif
		a[VisualServer::ARRAY_COLOR] = array;
	}

	if ((_format & VisualServer::ARRAY_FORMAT_TEX_UV) != 0) {
		PoolVector<Vector2> array;
		array.resize(_vertices.size());
#if !GODOT4
		PoolVector<Vector2>::Write w = array.write();
#endif

		for (int i = 0; i < _vertices.size(); ++i) {
#if !GODOT4
			w[i] = _vertices[i].uv;
#else
			array.set(i, _vertices[i].uv);
#endif
		}

#if !GODOT4
		w.release();
#endif

		a[VisualServer::ARRAY_TEX_UV] = array;
	}

	if ((_format & VisualServer::ARRAY_FORMAT_TEX_UV2) != 0) {
		PoolVector<Vector2> array;
		array.resize(_vertices.size());
#if !GODOT4
		PoolVector<Vector2>::Write w = array.write();
#endif

		for (int i = 0; i < _vertices.size(); ++i) {
#if !GODOT4
			w[i] = _vertices[i].uv2;
#else
			array.set(i, _vertices[i].uv2);
#endif
		}

#if !GODOT4
		w.release();
#endif
		a[VisualServer::ARRAY_TEX_UV2] = array;
	}

	if (_indices.size() > 0) {
		PoolVector<int> array;
		array.resize(_indices.size());
#if !GODOT4
		PoolVector<int>::Write w = array.write();
#endif

		for (int i = 0; i < _indices.size(); ++i) {
#if !GODOT4
			w[i] = _indices[i];
#else
			array.set(i, _indices[i]);
#endif
		}

#if !GODOT4
		w.release();
#endif
		a[VisualServer::ARRAY_INDEX] = array;
	}

	return a;
}

void PropMesher2D::build_mesh_into(RID mesh) {
	ERR_FAIL_COND(mesh == RID());

	VS::get_singleton()->mesh_clear(mesh);

	if (_vertices.size() == 0) {
		//Nothing to do
		return;
	}

	Array arr = build_mesh();

	VS::get_singleton()->mesh_add_surface_from_arrays(mesh, VisualServer::PRIMITIVE_TRIANGLES, arr);

	if (_material.is_valid())
		VS::get_singleton()->mesh_surface_set_material(mesh, 0, _material->get_rid());
}

void PropMesher2D::generate_normals(bool p_flip) {
	_format = _format | VisualServer::ARRAY_FORMAT_NORMAL;

	for (int i = 0; i < _indices.size(); i += 3) {
		int i0 = _indices[i];
		int i1 = _indices[i + 1];
		int i2 = _indices[i + 2];

		ERR_FAIL_INDEX(i0, _vertices.size());
		ERR_FAIL_INDEX(i1, _vertices.size());
		ERR_FAIL_INDEX(i2, _vertices.size());

		Vertex v0 = _vertices.get(i0);
		Vertex v1 = _vertices.get(i1);
		Vertex v2 = _vertices.get(i2);

		Vector3 normal;
		if (!p_flip)
			normal = Plane(v0.vertex, v1.vertex, v2.vertex).normal;
		else
			normal = Plane(v2.vertex, v1.vertex, v0.vertex).normal;

		v0.normal = normal;
		v1.normal = normal;
		v2.normal = normal;

		_vertices.set(i0, v0);
		_vertices.set(i1, v1);
		_vertices.set(i2, v2);
	}
}

void PropMesher2D::remove_doubles() {
	if (_vertices.size() == 0)
		return;

	//print_error("before " + String::num(_vertices.size()));

	for (int i = 0; i < _vertices.size(); ++i) {
		Vertex vert = _vertices[i];
		PoolVector<int> indices;

		for (int j = i + 1; j < _vertices.size(); ++j) {
			if (_vertices[j] == vert) {
				indices.push_back(j);
			}
		}

		for (int j = 0; j < indices.size(); ++j) {
			int index = indices[j];

			_vertices.remove(index);

			//make all indices that were bigger than the one we replaced one lower
			for (int k = 0; k < _indices.size(); ++k) {
				int indx = _indices[k];

				if (indx == index) {
					_indices.set(k, i);
				} else if (indx > index) {
					_indices.set(k, --indx);
				}
			}

			for (int k = j + 1; k < indices.size(); ++k) {
				int val = indices[k];

				if (val > index) {
					indices.set(k, --val);
				}
			}
		}
	}

	//print_error("after " + String::num(_vertices.size())+ " " + String::num(duration.count()));
}

//lot faster that normal remove_doubles, but false positives can happen curtesy of hash collisions
void PropMesher2D::remove_doubles_hashed() {
	if (_vertices.size() == 0)
		return;

	//print_error("before " + String::num(_vertices.size()));

	PoolVector<uint32_t> hashes;
	hashes.resize(_vertices.size());
	for (int i = 0; i < _vertices.size(); ++i) {
		hashes.set(i, VertexHasher::hash(_vertices[i]));
	}

	for (int i = 0; i < hashes.size(); ++i) {
		uint32_t hash = hashes[i];
		PoolVector<int> indices;

		for (int j = i + 1; j < hashes.size(); ++j) {
			if (hashes[j] == hash) {
				indices.push_back(j);
			}
		}

		for (int j = 0; j < indices.size(); ++j) {
			int index = indices[j];

			hashes.remove(index);
			_vertices.remove(index);

			//make all indices that were bigger than the one we replaced one lower
			for (int k = 0; k < _indices.size(); ++k) {
				int indx = _indices[k];

				if (indx == index) {
					_indices.set(k, i);
				} else if (indx > index) {
					_indices.set(k, --indx);
				}
			}

			for (int k = j + 1; k < indices.size(); ++k) {
				int val = indices[k];

				if (val > index) {
					indices.set(k, --val);
				}
			}
		}
	}

	//print_error("after " + String::num(_vertices.size()) + " " + String::num(duration.count()));
}

void PropMesher2D::reset() {
	_vertices.resize(0);
	_indices.resize(0);

	_last_color = Color();
	_last_normal = Vector3();
	_last_uv = Vector2();
	_last_uv2 = Vector2();
	_last_bones.clear();
	_last_weights.clear();
	_last_tangent = Plane();
}

void PropMesher2D::add_tiled_wall_simple(const int width, const int height, const Transform &transform, const Ref<TiledWallData2D> &tiled_wall_data, Ref<PropMaterialCache2D> cache) {
	ERR_FAIL_COND(!tiled_wall_data.is_valid());
	ERR_FAIL_COND(!cache.is_valid());
	ERR_FAIL_COND(width < 0);
	ERR_FAIL_COND(height < 0);

	if (tiled_wall_data->get_texture_count() == 0) {
		return;
	}

	float flavour_chance = tiled_wall_data->get_flavour_chance();

	//collect rects
	Vector<Rect2> normal_rects;
	Vector<Rect2> flavour_rects;

	for (int i = 0; i < tiled_wall_data->get_texture_count(); ++i) {
		const Ref<Texture> &t = tiled_wall_data->get_texture(i);

		if (t.is_valid()) {
			normal_rects.push_back(cache->texture_get_uv_rect(t));
		}
	}

	for (int i = 0; i < tiled_wall_data->get_flavour_texture_count(); ++i) {
		const Ref<Texture> &t = tiled_wall_data->get_flavour_texture(i);

		if (t.is_valid()) {
			flavour_rects.push_back(cache->texture_get_uv_rect(t));
		}
	}

	//fallback
	if (normal_rects.size() == 0) {
		normal_rects.push_back(Rect2(0, 0, 1, 1));
	}

	TiledWallData2D::TiledWallTilingType tiling_type = tiled_wall_data->get_tiling_type();

	//todo implement flavour!

	if (tiling_type == TiledWallData2D::TILED_WALL_TILING_TYPE_NONE) {
		Rect2 r = normal_rects[0];

		if (flavour_rects.size() == 0) {
			//no flavours
			for (int x = 0; x < width; ++x) {
				for (int y = 0; y < height; ++y) {
					add_tiled_wall_mesh_rect_simple(x, y, transform, r);
				}
			}
		} else {
			//has flavours
			for (int x = 0; x < width; ++x) {
				for (int y = 0; y < height; ++y) {
					if (Math::randf() > flavour_chance) {
						add_tiled_wall_mesh_rect_simple(x, y, transform, r);
					} else {
						add_tiled_wall_mesh_rect_simple(x, y, transform, flavour_rects[Math::rand() % flavour_rects.size()]);
					}
				}
			}
		}
	} else if (tiling_type == TiledWallData2D::TILED_WALL_TILING_TYPE_HORIZONTAL) {
		Rect2 r;

		if (flavour_rects.size() == 0) {
			//no flavours
			for (int x = 0; x < width; ++x) {
				r = normal_rects[x % normal_rects.size()];

				for (int y = 0; y < height; ++y) {
					add_tiled_wall_mesh_rect_simple(x, y, transform, r);
				}
			}
		} else {
			//has flavours
			for (int x = 0; x < width; ++x) {
				r = normal_rects[x % normal_rects.size()];

				for (int y = 0; y < height; ++y) {
					if (Math::randf() > flavour_chance) {
						add_tiled_wall_mesh_rect_simple(x, y, transform, r);
					} else {
						add_tiled_wall_mesh_rect_simple(x, y, transform, flavour_rects[Math::rand() % flavour_rects.size()]);
					}
				}
			}
		}
	} else if (tiling_type == TiledWallData2D::TILED_WALL_TILING_TYPE_VERTICAL) {
		Rect2 r;

		if (flavour_rects.size() == 0) {
			//no flavours
			for (int x = 0; x < width; ++x) {
				for (int y = 0; y < height; ++y) {
					r = normal_rects[y % normal_rects.size()];

					add_tiled_wall_mesh_rect_simple(x, y, transform, r);
				}
			}
		} else {
			//has flavours
			for (int x = 0; x < width; ++x) {
				for (int y = 0; y < height; ++y) {
					r = normal_rects[y % normal_rects.size()];

					if (Math::randf() > flavour_chance) {
						add_tiled_wall_mesh_rect_simple(x, y, transform, r);
					} else {
						add_tiled_wall_mesh_rect_simple(x, y, transform, flavour_rects[Math::rand() % flavour_rects.size()]);
					}
				}
			}
		}
	} else if (tiling_type == TiledWallData2D::TILED_WALL_TILING_TYPE_BOTH) {
		Rect2 r;

		if (flavour_rects.size() == 0) {
			//no flavours
			for (int x = 0; x < width; ++x) {
				for (int y = 0; y < height; ++y) {
					r = normal_rects[(x + y) % normal_rects.size()];

					add_tiled_wall_mesh_rect_simple(x, y, transform, r);
				}
			}
		} else {
			//has flavours
			for (int x = 0; x < width; ++x) {
				for (int y = 0; y < height; ++y) {
					r = normal_rects[(x + y) % normal_rects.size()];

					if (Math::randf() > flavour_chance) {
						add_tiled_wall_mesh_rect_simple(x, y, transform, r);
					} else {
						add_tiled_wall_mesh_rect_simple(x, y, transform, flavour_rects[Math::rand() % flavour_rects.size()]);
					}
				}
			}
		}
	}
}

void PropMesher2D::add_tiled_wall_mesh_rect_simple(const int x, const int y, const Transform &transform, const Rect2 &texture_rect) {
	int vc = get_vertex_count();

	//x + 1, y
	add_normal(transform.basis.xform(Vector3(0, 0, -1)));
	add_uv(transform_uv(Vector2(1, 1), texture_rect));
	add_vertex(transform.xform(Vector3(x + 1, y, 0)));

	//x, y
	add_normal(transform.basis.xform(Vector3(0, 0, -1)));
	add_uv(transform_uv(Vector2(0, 1), texture_rect));
	add_vertex(transform.xform(Vector3(x, y, 0)));

	//x, y + 1
	add_normal(transform.basis.xform(Vector3(0, 0, -1)));
	add_uv(transform_uv(Vector2(0, 0), texture_rect));
	add_vertex(transform.xform(Vector3(x, y + 1, 0)));

	//x + 1, y + 1
	add_normal(transform.basis.xform(Vector3(0, 0, -1)));
	add_uv(transform_uv(Vector2(1, 0), texture_rect));
	add_vertex(transform.xform(Vector3(x + 1, y + 1, 0)));

	add_indices(vc + 2);
	add_indices(vc + 1);
	add_indices(vc + 0);
	add_indices(vc + 3);
	add_indices(vc + 2);
	add_indices(vc + 0);
}

_FORCE_INLINE_ Vector2 PropMesher2D::transform_uv(const Vector2 &uv, const Rect2 &rect) const {
	Vector2 ruv = uv;

	ruv.x *= rect.size.x;
	ruv.y *= rect.size.y;
	ruv.x += rect.position.x;
	ruv.y += rect.position.y;

	return ruv;
}

#ifdef MESH_DATA_RESOURCE_PRESENT
void PropMesher2D::add_mesh_data_resource(Ref<MeshDataResource> mesh, const Vector3 position, const Vector3 rotation, const Vector3 scale, const Rect2 uv_rect) {
	Transform transform = Transform(Basis(rotation).scaled(scale), position);

	add_mesh_data_resource_transform(mesh, transform, uv_rect);
}

void PropMesher2D::add_mesh_data_resource_transform(Ref<MeshDataResource> mesh, const Transform transform, const Rect2 uv_rect) {
	if (mesh->get_array().size() == 0)
		return;

	const Array &arr = mesh->get_array();

	PoolVector3Array vertices = arr[Mesh::ARRAY_VERTEX];
	PoolVector3Array normals = arr[Mesh::ARRAY_NORMAL];
	PoolVector2Array uvs = arr[Mesh::ARRAY_TEX_UV];
	PoolColorArray colors = arr[Mesh::ARRAY_COLOR];
	PoolIntArray indices = arr[Mesh::ARRAY_INDEX];

	if (vertices.size() == 0)
		return;

	int orig_vert_size = _vertices.size();

	for (int i = 0; i < vertices.size(); ++i) {
		if (normals.size() > 0)
			add_normal(transform.basis.xform(normals[i]));

		if (normals.size() > 0) {
			Vector2 uv = uvs[i];

			uv.x = uv_rect.size.width * uv.x + uv_rect.position.x;
			uv.y = uv_rect.size.height * uv.y + uv_rect.position.y;

			add_uv(uv);
		}

		if (colors.size() > 0)
			add_color(colors[i]);

		add_vertex(transform.xform(vertices[i]));
	}

	int orig_indices_count = _indices.size();
	_indices.resize(_indices.size() + indices.size());

	for (int i = 0; i < indices.size(); ++i) {
		_indices.set(orig_indices_count + i, orig_vert_size + indices[i]);
	}
}

void PropMesher2D::add_mesh_data_resource_transform_colored(Ref<MeshDataResource> mesh, const Transform transform, const PoolColorArray &colors, const Rect2 uv_rect) {
	if (mesh->get_array().size() == 0)
		return;

	const Array &arr = mesh->get_array();

	PoolVector3Array vertices = arr[Mesh::ARRAY_VERTEX];
	PoolVector3Array normals = arr[Mesh::ARRAY_NORMAL];
	PoolVector2Array uvs = arr[Mesh::ARRAY_TEX_UV];
	PoolIntArray indices = arr[Mesh::ARRAY_INDEX];

	if (vertices.size() == 0)
		return;

	int orig_vert_size = _vertices.size();

	for (int i = 0; i < vertices.size(); ++i) {
		if (normals.size() > 0)
			add_normal(transform.basis.xform(normals[i]));

		if (normals.size() > 0) {
			Vector2 uv = uvs[i];

			uv.x = uv_rect.size.width * uv.x + uv_rect.position.x;
			uv.y = uv_rect.size.height * uv.y + uv_rect.position.y;

			add_uv(uv);
		}

		if (colors.size() > 0)
			add_color(colors[i]);

		add_vertex(transform.xform(vertices[i]));
	}

	int orig_indices_count = _indices.size();
	_indices.resize(_indices.size() + indices.size());

	for (int i = 0; i < indices.size(); ++i) {
		_indices.set(orig_indices_count + i, orig_vert_size + indices[i]);
	}
}
#endif

//Data Management functions
void PropMesher2D::generate_ao() {
	/*
	ERR_FAIL_COND(!_chunk.is_valid());

	int data_size_x = _chunk->get_data_size_x();
	int data_size_z = _chunk->get_data_size_z();

	ERR_FAIL_COND(data_size_x == 0 || data_size_z == 0);

	int margin_start = _chunk->get_margin_start();
	int margin_end = _chunk->get_margin_end();

	int ssize_x = _chunk->get_size_x();
	int ssize_z = _chunk->get_size_z();

	int size_x = ssize_x + margin_end;
	int size_z = ssize_z + margin_end;

	for (int z = margin_start - 1; z < size_z - 1; ++z) {
		for (int x = margin_start - 1; x < size_x - 1; ++x) {
			int current = _chunk->get_voxel(x, z, TerraChunkDefault::DEFAULT_CHANNEL_ISOLEVEL);

			int sum = _chunk->get_voxel(x + 1, z, TerraChunkDefault::DEFAULT_CHANNEL_ISOLEVEL);
			sum += _chunk->get_voxel(x - 1, z, TerraChunkDefault::DEFAULT_CHANNEL_ISOLEVEL);
			sum += _chunk->get_voxel(x, z + 1, TerraChunkDefault::DEFAULT_CHANNEL_ISOLEVEL);
			sum += _chunk->get_voxel(x, z - 1, TerraChunkDefault::DEFAULT_CHANNEL_ISOLEVEL);

			sum /= 6;

			sum -= current;

			if (sum < 0)
				sum = 0;

			_chunk->set_voxel(sum, x, z, TerraChunkDefault::DEFAULT_CHANNEL_AO);
		}
	}*/
}

float PropMesher2D::get_random_ao(const Vector3 &position) {
	float val = _noise->get_noise_3d(position.x, position.y, position.z);

	val *= _rao_scale_factor;

	if (val > 1)
		val = 1;

	if (val < 0)
		val = -val;

	return val;
}

Color PropMesher2D::get_light_color_at(const Vector3 &position, const Vector3 &normal) {
	Vector3 v_lightDiffuse;

	//calculate the lights value
	for (int i = 0; i < _lights.size(); ++i) {
		Ref<PropLight2D> light = _lights.get(i);

		Vector3 lightDir = light->get_position() - position;

		float dist2 = lightDir.dot(lightDir);
		//inverse sqrt
		lightDir *= (1.0 / sqrt(dist2));

		float NdotL = normal.dot(lightDir);

		if (NdotL > 1.0) {
			NdotL = 1.0;
		} else if (NdotL < 0.0) {
			NdotL = 0.0;
		}

		Color cc = light->get_color();
		Vector3 cv(cc.r, cc.g, cc.b);

		Vector3 value = cv * (NdotL / (1.0 + dist2));

		value *= light->get_size();
		v_lightDiffuse += value;

		/*
                    float dist2 = Mathf.Clamp(Vector3.Distance(transformedLights[i], vertices), 0f, 15f);
                    dist2 /= 35f;

                    Vector3 value = Vector3.one;
                    value *= ((float) lights[i].Strength) / 255f;
                    value *= (1 - dist2);
                    v_lightDiffuse += value;*/
	}

	return Color(v_lightDiffuse.x, v_lightDiffuse.y, v_lightDiffuse.z);
}

void PropMesher2D::add_mesher(const Ref<PropMesher2D> &mesher) {
	call("_add_mesher", mesher);
}
void PropMesher2D::_add_mesher(const Ref<PropMesher2D> &mesher) {
	int orig_size = _vertices.size();

	_vertices.append_array(mesher->_vertices);

	int s = mesher->_indices.size();

	if (s == 0)
		return;

	int orig_indices_size = _indices.size();

	_indices.resize(_indices.size() + s);
	for (int i = 0; i < s; ++i) {
		_indices.set(i + orig_indices_size, mesher->_indices[i] + orig_size);
	}
}

void PropMesher2D::add_light(const Ref<PropLight2D> &light) {
	_lights.push_back(light);
}
void PropMesher2D::clear_lights() {
	_lights.clear();
}

PoolVector<Vector3> PropMesher2D::build_collider() const {
	PoolVector<Vector3> face_points;

	if (_vertices.size() == 0)
		return face_points;

	if (_indices.size() == 0) {
		int len = (_vertices.size() / 4);

		for (int i = 0; i < len; ++i) {
			face_points.push_back(_vertices.get(i * 4).vertex);
			face_points.push_back(_vertices.get((i * 4) + 2).vertex);
			face_points.push_back(_vertices.get((i * 4) + 1).vertex);

			face_points.push_back(_vertices.get(i * 4).vertex);
			face_points.push_back(_vertices.get((i * 4) + 3).vertex);
			face_points.push_back(_vertices.get((i * 4) + 2).vertex);
		}

		return face_points;
	}

	face_points.resize(_indices.size());
	for (int i = 0; i < face_points.size(); i++) {
		face_points.set(i, _vertices.get(_indices.get(i)).vertex);
	}

	return face_points;
}

void PropMesher2D::bake_colors() {
	if ((get_build_flags() & PropMesher2D::BUILD_FLAG_USE_LIGHTING) == 0) {
		return;
	}

	bool rao = (get_build_flags() & PropMesher2D::BUILD_FLAG_USE_RAO) != 0;
	bool lights = (get_build_flags() & PropMesher2D::BUILD_FLAG_BAKE_LIGHTS) != 0;

	if (rao && lights) {
		bake_colors_lights_rao();
		return;
	}

	if (rao) {
		bake_colors_rao();
		return;
	}

	if (lights) {
		bake_colors_lights();
		return;
	}
}

void PropMesher2D::bake_colors_rao() {
	for (int i = 0; i < _vertices.size(); ++i) {
		Vertex vertex = _vertices[i];
		Vector3 vert = vertex.vertex;

		Color light = Color(_base_light_value, _base_light_value, _base_light_value);

		float rao = get_random_ao(vert) * _ao_strength;

		light.r -= rao;
		light.g -= rao;
		light.b -= rao;

		light.r = CLAMP(light.r, 0, 1.0);
		light.g = CLAMP(light.g, 0, 1.0);
		light.b = CLAMP(light.b, 0, 1.0);

		Color c = vertex.color;
		light.a = c.a;
		vertex.color = light;

		_vertices.set(i, vertex);
	}
}
void PropMesher2D::bake_colors_lights_rao() {
	for (int i = 0; i < _vertices.size(); ++i) {
		Vertex vertex = _vertices[i];
		Vector3 vert = vertex.vertex;

		Color light = get_light_color_at(vert, vertex.normal);

		float rao = get_random_ao(vert) * _ao_strength;

		light.r += _base_light_value;
		light.g += _base_light_value;
		light.b += _base_light_value;

		light.r -= rao;
		light.g -= rao;
		light.b -= rao;

		light.r = CLAMP(light.r, 0, 1.0);
		light.g = CLAMP(light.g, 0, 1.0);
		light.b = CLAMP(light.b, 0, 1.0);

		Color c = vertex.color;
		light.a = c.a;
		vertex.color = light;

		_vertices.set(i, vertex);
	}
}
void PropMesher2D::bake_colors_lights() {
	for (int i = 0; i < _vertices.size(); ++i) {
		Vertex vertex = _vertices[i];
		Vector3 vert = vertex.vertex;

		Color light = get_light_color_at(vert, vertex.normal);

		light.r += _base_light_value;
		light.g += _base_light_value;
		light.b += _base_light_value;

		light.r = CLAMP(light.r, 0, 1.0);
		light.g = CLAMP(light.g, 0, 1.0);
		light.b = CLAMP(light.b, 0, 1.0);

		Color c = vertex.color;
		light.a = c.a;
		vertex.color = light;

		_vertices.set(i, vertex);
	}
}

#ifdef TERRAMAN_PRESENT
void PropMesher2D::bake_lights(MeshInstance *node, Vector<Ref<TerraLight>> &lights) {
	ERR_FAIL_COND(node == NULL);

	Color darkColor(0, 0, 0, 1);

	for (int v = 0; v < _vertices.size(); ++v) {
		Vertex vertexv = _vertices.get(v);
		Vector3 vet = vertexv.vertex;
		Vector3 vertex = node->to_global(vet);

		//grab normal
		Vector3 normal = vertexv.normal;

		Vector3 v_lightDiffuse;

		//calculate the lights value
		for (int i = 0; i < lights.size(); ++i) {
			Ref<TerraLight> light = lights.get(i);

			Vector3 lightDir = light->get_world_position() - vertex;

			float dist2 = lightDir.dot(lightDir);
			//inverse sqrt
			lightDir *= (1.0 / sqrt(dist2));

			float NdotL = normal.dot(lightDir);

			if (NdotL > 1.0) {
				NdotL = 1.0;
			} else if (NdotL < 0.0) {
				NdotL = 0.0;
			}

			Color cc = light->get_color();
			Vector3 cv(cc.r, cc.g, cc.b);

			Vector3 value = cv * (NdotL / (1.0 + dist2));

			value *= light->get_size();
			v_lightDiffuse += value;

			/*
                    float dist2 = Mathf.Clamp(Vector3.Distance(transformedLights[i], vertices), 0f, 15f);
                    dist2 /= 35f;

                    Vector3 value = Vector3.one;
                    value *= ((float) lights[i].Strength) / 255f;
                    value *= (1 - dist2);
                    v_lightDiffuse += value;*/
		}

		Color f = vertexv.color;
		//Color f = darkColor;

		Vector3 cv2(f.r, f.g, f.b);
		cv2 += v_lightDiffuse;

		if (cv2.x > 1)
			cv2.x = 1;

		if (cv2.y > 1)
			cv2.y = 1;

		if (cv2.y > 1)
			cv2.y = 1;

		// cv2.x = Mathf.Clamp(cv2.x, 0f, 1f);
		//cv2.y = Mathf.Clamp(cv2.y, 0f, 1f);
		// cv2.z = Mathf.Clamp(cv2.z, 0f, 1f);

		f.r = cv2.x;
		f.g = cv2.y;
		f.b = cv2.z;

		//f.r = v_lightDiffuse.x;
		//f.g = v_lightDiffuse.y;
		//f.b = v_lightDiffuse.z;

		vertexv.color = f;
		_vertices.set(v, vertexv);
	}

	//	for (int i = 0; i < _colors->size(); ++i) {
	//		print_error(_colors->get(i));
	//	}
}
#endif

PoolVector<Vector3> PropMesher2D::get_vertices() const {
	PoolVector<Vector3> arr;

	arr.resize(_vertices.size());
	for (int i = 0; i < _vertices.size(); ++i) {
		arr.set(i, _vertices.get(i).vertex);
	}

	return arr;
}

void PropMesher2D::set_vertices(const PoolVector<Vector3> &values) {
	ERR_FAIL_COND(values.size() != _vertices.size());

	for (int i = 0; i < _vertices.size(); ++i) {
		Vertex v = _vertices[i];

		v.normal = values[i];

		_vertices.set(i, v);
	}
}

int PropMesher2D::get_vertex_count() const {
	return _vertices.size();
}

void PropMesher2D::add_vertex(const Vector3 &vertex) {
	Vertex vtx;
	vtx.vertex = vertex;
	vtx.color = _last_color;
	vtx.normal = _last_normal;
	vtx.uv = _last_uv;
	vtx.uv2 = _last_uv2;
	// Todo?
	//	vtx.weights = _last_weights;
	//	vtx.bones = _last_bones;
	//	vtx.tangent = _last_tangent.normal;
	//	vtx.binormal = _last_normal.cross(_last_tangent.normal).normalized() * _last_tangent.d;

	_vertices.push_back(vtx);
}

Vector3 PropMesher2D::get_vertex(const int idx) const {
	return _vertices.get(idx).vertex;
}

void PropMesher2D::remove_vertex(const int idx) {
	_vertices.remove(idx);
}

PoolVector<Vector3> PropMesher2D::get_normals() const {
	PoolVector<Vector3> arr;

	arr.resize(_vertices.size());
	for (int i = 0; i < _vertices.size(); ++i) {
		arr.set(i, _vertices.get(i).normal);
	}

	return arr;
}

void PropMesher2D::set_normals(const PoolVector<Vector3> &values) {
	ERR_FAIL_COND(values.size() != _vertices.size());

	for (int i = 0; i < _vertices.size(); ++i) {
		Vertex v = _vertices[i];

		v.normal = values[i];

		_vertices.set(i, v);
	}
}

void PropMesher2D::add_normal(const Vector3 &normal) {
	_last_normal = normal;
}

Vector3 PropMesher2D::get_normal(int idx) const {
	return _vertices.get(idx).normal;
}

PoolVector<Color> PropMesher2D::get_colors() const {
	PoolVector<Color> arr;

	arr.resize(_vertices.size());
	for (int i = 0; i < _vertices.size(); ++i) {
		arr.set(i, _vertices.get(i).color);
	}

	return arr;
}

void PropMesher2D::set_colors(const PoolVector<Color> &values) {
	ERR_FAIL_COND(values.size() != _vertices.size());

	for (int i = 0; i < _vertices.size(); ++i) {
		Vertex v = _vertices[i];

		v.color = values[i];

		_vertices.set(i, v);
	}
}

void PropMesher2D::add_color(const Color &color) {
	_last_color = color;
}

Color PropMesher2D::get_color(const int idx) const {
	return _vertices.get(idx).color;
}

PoolVector<Vector2> PropMesher2D::get_uvs() const {
	PoolVector<Vector2> arr;

	arr.resize(_vertices.size());
	for (int i = 0; i < _vertices.size(); ++i) {
		arr.set(i, _vertices.get(i).uv);
	}

	return arr;
}

void PropMesher2D::set_uvs(const PoolVector<Vector2> &values) {
	ERR_FAIL_COND(values.size() != _vertices.size());

	for (int i = 0; i < _vertices.size(); ++i) {
		Vertex v = _vertices[i];

		v.uv = values[i];

		_vertices.set(i, v);
	}
}

void PropMesher2D::add_uv(const Vector2 &uv) {
	_last_uv = uv;
}

Vector2 PropMesher2D::get_uv(const int idx) const {
	return _vertices.get(idx).uv;
}

PoolVector<Vector2> PropMesher2D::get_uv2s() const {
	PoolVector<Vector2> arr;

	arr.resize(_vertices.size());
	for (int i = 0; i < _vertices.size(); ++i) {
		arr.set(i, _vertices.get(i).uv2);
	}

	return arr;
}

void PropMesher2D::set_uv2s(const PoolVector<Vector2> &values) {
	ERR_FAIL_COND(values.size() != _vertices.size());

	for (int i = 0; i < _vertices.size(); ++i) {
		Vertex v = _vertices[i];

		v.uv2 = values[i];

		_vertices.set(i, v);
	}
}

void PropMesher2D::add_uv2(const Vector2 &uv) {
	_last_uv2 = uv;
}

Vector2 PropMesher2D::get_uv2(const int idx) const {
	return _vertices.get(idx).uv2;
}

PoolVector<int> PropMesher2D::get_indices() const {
	return _indices;
}

void PropMesher2D::set_indices(const PoolVector<int> &values) {
	_indices = values;
}

int PropMesher2D::get_indices_count() const {
	return _indices.size();
}

void PropMesher2D::add_indices(const int index) {
	_indices.push_back(index);
}

int PropMesher2D::get_index(const int idx) const {
	return _indices.get(idx);
}

void PropMesher2D::remove_index(const int idx) {
	_indices.remove(idx);
}

PropMesher2D::PropMesher2D() {
	_mesher_index = 0;
	_voxel_scale = 1;
	_ao_strength = 0.25;
	_base_light_value = 0.5;
	_uv_margin = Rect2(0, 0, 1, 1);
	_format = 0;
	_channel_index_type = 0;
	_channel_index_isolevel = 0;
	_texture_scale = 1;

	_build_flags = 0;

	_format = VisualServer::ARRAY_FORMAT_NORMAL | VisualServer::ARRAY_FORMAT_TEX_UV;

	_noise.instance();
	//todo add properties for these if needed
	_noise->set_octaves(4);
	_noise->set_period(30);
	_noise->set_persistence(0.3);

	_rao_scale_factor = 0.6;
	_rao_seed = 2134;
}

PropMesher2D::~PropMesher2D() {
}

void PropMesher2D::_bind_methods() {
	ClassDB::bind_method(D_METHOD("get_channel_index_type"), &PropMesher2D::get_channel_index_type);
	ClassDB::bind_method(D_METHOD("set_channel_index_type", "value"), &PropMesher2D::set_channel_index_type);
	ADD_PROPERTY(PropertyInfo(Variant::INT, "channel_index_type"), "set_channel_index_type", "get_channel_index_type");

	ClassDB::bind_method(D_METHOD("get_channel_index_isolevel"), &PropMesher2D::get_channel_index_isolevel);
	ClassDB::bind_method(D_METHOD("set_channel_index_isolevel", "value"), &PropMesher2D::set_channel_index_isolevel);
	ADD_PROPERTY(PropertyInfo(Variant::INT, "channel_index_isolevel"), "set_channel_index_isolevel", "get_channel_index_isolevel");

	ClassDB::bind_method(D_METHOD("get_mesher_index"), &PropMesher2D::get_mesher_index);
	ClassDB::bind_method(D_METHOD("set_mesher_index", "value"), &PropMesher2D::set_mesher_index);
	ADD_PROPERTY(PropertyInfo(Variant::INT, "mesher_index"), "set_mesher_index", "get_mesher_index");

	ClassDB::bind_method(D_METHOD("get_format"), &PropMesher2D::get_format);
	ClassDB::bind_method(D_METHOD("set_format", "value"), &PropMesher2D::set_format);
	ADD_PROPERTY(PropertyInfo(Variant::INT, "format"), "set_format", "get_format");

	ClassDB::bind_method(D_METHOD("get_texture_scale"), &PropMesher2D::get_texture_scale);
	ClassDB::bind_method(D_METHOD("set_texture_scale", "value"), &PropMesher2D::set_texture_scale);
	ADD_PROPERTY(PropertyInfo(Variant::INT, "texture_scale"), "set_texture_scale", "get_texture_scale");

	ClassDB::bind_method(D_METHOD("get_material"), &PropMesher2D::get_material);
	ClassDB::bind_method(D_METHOD("set_material", "value"), &PropMesher2D::set_material);
	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "material", PROPERTY_HINT_RESOURCE_TYPE, "Material"), "set_material", "get_material");

	ClassDB::bind_method(D_METHOD("get_voxel_scale"), &PropMesher2D::get_voxel_scale);
	ClassDB::bind_method(D_METHOD("set_voxel_scale", "value"), &PropMesher2D::set_voxel_scale);
	ADD_PROPERTY(PropertyInfo(Variant::REAL, "voxel_scale"), "set_voxel_scale", "get_voxel_scale");

	ClassDB::bind_method(D_METHOD("get_ao_strength"), &PropMesher2D::get_ao_strength);
	ClassDB::bind_method(D_METHOD("set_ao_strength", "value"), &PropMesher2D::set_ao_strength);
	ADD_PROPERTY(PropertyInfo(Variant::REAL, "ao_strength"), "set_ao_strength", "get_ao_strength");

	ClassDB::bind_method(D_METHOD("get_base_light_value"), &PropMesher2D::get_base_light_value);
	ClassDB::bind_method(D_METHOD("set_base_light_value", "value"), &PropMesher2D::set_base_light_value);
	ADD_PROPERTY(PropertyInfo(Variant::REAL, "base_light_value"), "set_base_light_value", "get_base_light_value");

	ClassDB::bind_method(D_METHOD("get_uv_margin"), &PropMesher2D::get_uv_margin);
	ClassDB::bind_method(D_METHOD("set_uv_margin", "value"), &PropMesher2D::set_uv_margin);
	ADD_PROPERTY(PropertyInfo(Variant::RECT2, "uv_margin"), "set_uv_margin", "get_uv_margin");

	ClassDB::bind_method(D_METHOD("get_build_flags"), &PropMesher2D::get_build_flags);
	ClassDB::bind_method(D_METHOD("set_build_flags", "value"), &PropMesher2D::set_build_flags);
	ADD_PROPERTY(PropertyInfo(Variant::INT, "build_flags", PROPERTY_HINT_FLAGS, PropMesher2D::BINDING_STRING_BUILD_FLAGS), "set_build_flags", "get_build_flags");

	ClassDB::bind_method(D_METHOD("add_tiled_wall_simple", "width", "height", "transform", "tiled_wall_data", "cache"), &PropMesher2D::add_tiled_wall_simple);
	ClassDB::bind_method(D_METHOD("add_tiled_wall_mesh_rect_simple", "x", "y", "transform", "texture_rect"), &PropMesher2D::add_tiled_wall_mesh_rect_simple);
	ClassDB::bind_method(D_METHOD("transform_uv", "uv", "rect"), &PropMesher2D::transform_uv);

#ifdef MESH_DATA_RESOURCE_PRESENT
	ClassDB::bind_method(D_METHOD("add_mesh_data_resource", "mesh", "position", "rotation", "scale", "uv_rect"), &PropMesher2D::add_mesh_data_resource, DEFVAL(Rect2(0, 0, 1, 1)), DEFVAL(Vector3(1.0, 1.0, 1.0)), DEFVAL(Vector3()), DEFVAL(Vector3()));
	ClassDB::bind_method(D_METHOD("add_mesh_data_resource_transform", "mesh", "transform", "uv_rect"), &PropMesher2D::add_mesh_data_resource_transform, DEFVAL(Rect2(0, 0, 1, 1)));
	ClassDB::bind_method(D_METHOD("add_mesh_data_resource_transform_colored", "mesh", "transform", "colors", "uv_rect"), &PropMesher2D::add_mesh_data_resource_transform_colored, DEFVAL(Rect2(0, 0, 1, 1)));
#endif

	ClassDB::bind_method(D_METHOD("generate_ao"), &PropMesher2D::generate_ao);
	ClassDB::bind_method(D_METHOD("get_random_ao", "position"), &PropMesher2D::get_random_ao);

	BIND_VMETHOD(MethodInfo("_add_mesher", PropertyInfo(Variant::OBJECT, "mesher", PROPERTY_HINT_RESOURCE_TYPE, "PropMesher2D")));
	ClassDB::bind_method(D_METHOD("add_mesher", "mesher"), &PropMesher2D::add_mesher);
	ClassDB::bind_method(D_METHOD("_add_mesher", "mesher"), &PropMesher2D::_add_mesher);

	ClassDB::bind_method(D_METHOD("add_light", "light"), &PropMesher2D::add_light);
	ClassDB::bind_method(D_METHOD("clear_lights"), &PropMesher2D::clear_lights);

	ClassDB::bind_method(D_METHOD("get_vertices"), &PropMesher2D::get_vertices);
	ClassDB::bind_method(D_METHOD("set_vertices", "values"), &PropMesher2D::set_vertices);
	ClassDB::bind_method(D_METHOD("get_vertex_count"), &PropMesher2D::get_vertex_count);
	ClassDB::bind_method(D_METHOD("get_vertex", "idx"), &PropMesher2D::get_vertex);
	ClassDB::bind_method(D_METHOD("remove_vertex", "idx"), &PropMesher2D::remove_vertex);
	ClassDB::bind_method(D_METHOD("add_vertex", "vertex"), &PropMesher2D::add_vertex);

	ClassDB::bind_method(D_METHOD("get_normals"), &PropMesher2D::get_normals);
	ClassDB::bind_method(D_METHOD("set_normals", "values"), &PropMesher2D::set_normals);
	ClassDB::bind_method(D_METHOD("get_normal", "idx"), &PropMesher2D::get_normal);
	ClassDB::bind_method(D_METHOD("add_normal", "normal"), &PropMesher2D::add_normal);

	ClassDB::bind_method(D_METHOD("get_colors"), &PropMesher2D::get_colors);
	ClassDB::bind_method(D_METHOD("set_colors", "values"), &PropMesher2D::set_colors);
	ClassDB::bind_method(D_METHOD("get_color", "idx"), &PropMesher2D::get_color);
	ClassDB::bind_method(D_METHOD("add_color", "color"), &PropMesher2D::add_color);

	ClassDB::bind_method(D_METHOD("get_uvs"), &PropMesher2D::get_uvs);
	ClassDB::bind_method(D_METHOD("set_uvs", "values"), &PropMesher2D::set_uvs);
	ClassDB::bind_method(D_METHOD("get_uv", "idx"), &PropMesher2D::get_uv);
	ClassDB::bind_method(D_METHOD("add_uv", "uv"), &PropMesher2D::add_uv);

	ClassDB::bind_method(D_METHOD("get_uv2s"), &PropMesher2D::get_uv2s);
	ClassDB::bind_method(D_METHOD("set_uv2s", "values"), &PropMesher2D::set_uv2s);
	ClassDB::bind_method(D_METHOD("get_uv2", "idx"), &PropMesher2D::get_uv2);
	ClassDB::bind_method(D_METHOD("add_uv2", "uv"), &PropMesher2D::add_uv2);

	ClassDB::bind_method(D_METHOD("get_indices"), &PropMesher2D::get_indices);
	ClassDB::bind_method(D_METHOD("set_indices", "values"), &PropMesher2D::set_indices);
	ClassDB::bind_method(D_METHOD("get_indices_count"), &PropMesher2D::get_indices_count);
	ClassDB::bind_method(D_METHOD("get_index", "idx"), &PropMesher2D::get_index);
	ClassDB::bind_method(D_METHOD("remove_index", "idx"), &PropMesher2D::remove_index);
	ClassDB::bind_method(D_METHOD("add_indices", "indice"), &PropMesher2D::add_indices);

	ClassDB::bind_method(D_METHOD("reset"), &PropMesher2D::reset);

	//ClassDB::bind_method(D_METHOD("calculate_vertex_ambient_occlusion", "meshinstance_path", "radius", "intensity", "sampleCount"), &PropMesher2D::calculate_vertex_ambient_occlusion_path);

	ClassDB::bind_method(D_METHOD("build_mesh"), &PropMesher2D::build_mesh);
	ClassDB::bind_method(D_METHOD("build_mesh_into", "mesh_rid"), &PropMesher2D::build_mesh_into);
	ClassDB::bind_method(D_METHOD("build_collider"), &PropMesher2D::build_collider);

	ClassDB::bind_method(D_METHOD("bake_colors"), &PropMesher2D::bake_colors);

	ClassDB::bind_method(D_METHOD("generate_normals", "flip"), &PropMesher2D::generate_normals, DEFVAL(false));

	ClassDB::bind_method(D_METHOD("remove_doubles"), &PropMesher2D::remove_doubles);
	ClassDB::bind_method(D_METHOD("remove_doubles_hashed"), &PropMesher2D::remove_doubles_hashed);
}