Added project: first working prototype, but lots of TODOs

.gitignore

@@ -0,0 +1,2 @@
+*.obj
+*.pyc

SCsub

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+Import('env')
+
+env.add_source_files(env.modules_sources,"*.cpp")
+env.add_source_files(env.modules_sources,"lib/*.c")
+

config.py

@@ -0,0 +1,11 @@
+
+
+def can_build(platform):
+  return True
+
+
+def configure(env):
+	pass
+
+
+

register_types.cpp

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+#include "register_types.h"
+#include "voxel_buffer.h"
+#include "voxel_mesh_builder.h"
+
+void register_voxel_types() {
+
+    ObjectTypeDB::register_type<Voxel>();
+    ObjectTypeDB::register_type<VoxelBuffer>();
+    ObjectTypeDB::register_type<VoxelMeshBuilder>();
+
+}
+
+void unregister_voxel_types() {
+
+}
+

register_types.h

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+void register_voxel_types();
+void unregister_voxel_types();

vector3i.h

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+#ifndef VOXEL_VECTOR3I_H
+#define VOXEL_VECTOR3I_H
+
+struct Vector3i {
+
+    int x;
+    int y;
+    int z;
+
+    Vector3i() : x(0), y(0), z(0) {}
+
+    Vector3i(int px, int py, int pz) : x(px), y(py), z(pz) {}
+
+    Vector3i(const Vector3i & other) {
+        *this = other;
+    }
+
+    Vector3i & operator=(const Vector3i & other) {
+        x = other.x;
+        y = other.y;
+        z = other.z;
+        return *this;
+    }
+
+    bool operator==(const Vector3i & other) {
+        return x == other.x && y == other.y && z == other.z;
+    }
+
+    bool operator!=(const Vector3i & other) {
+        return x != other.x && y != other.y && z != other.z;
+    }
+
+};
+
+#endif // VOXEL_VECTOR3I_H
+

voxel.cpp

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+#include "voxel.h"
+
+Voxel::Voxel() : Reference(), _id(0), _material_id(0), _is_transparent(false), _color(1.f, 1.f, 1.f) {
+
+}
+
+void Voxel::set_id(int id) {
+    ERR_FAIL_COND(id < 0 || id >= 256);
+    _id = id;
+}
+
+void Voxel::set_cube_geometry(float sy) {
+    const Vector3 vertices[SIDE_COUNT][6] = {
+        {
+            // LEFT
+            Vector3(0, 0, 0),
+            Vector3(0, sy, 0),
+            Vector3(0, sy, 1),
+            Vector3(0, 0, 0),
+            Vector3(0, sy, 1),
+            Vector3(0, 0, 1),
+        },
+        {
+            // RIGHT
+            Vector3(1, 0, 0),
+            Vector3(1, sy, 1),
+            Vector3(1, sy, 0),
+            Vector3(1, 0, 0),
+            Vector3(1, 0, 1),
+            Vector3(1, sy, 1)
+        },
+        {
+            // BOTTOM
+            Vector3(0, 0, 0),
+            Vector3(1, 0, 1),
+            Vector3(1, 0, 0),
+            Vector3(0, 0, 0),
+            Vector3(0, 0, 1),
+            Vector3(1, 0, 1)
+        },
+        {
+            // TOP
+            Vector3(0, sy, 0),
+            Vector3(1, sy, 0),
+            Vector3(1, sy, 1),
+            Vector3(0, sy, 0),
+            Vector3(1, sy, 1),
+            Vector3(0, sy, 1)
+        },
+        {
+            // BACK
+            Vector3(0, 0, 0),
+            Vector3(1, 0, 0),
+            Vector3(1, sy, 0),
+            Vector3(0, 0, 0),
+            Vector3(1, sy, 0),
+            Vector3(0, sy, 0),
+        },
+        {
+            // FRONT
+            Vector3(1, 0, 1),
+            Vector3(0, 0, 1),
+            Vector3(1, sy, 1),
+            Vector3(0, 0, 1),
+            Vector3(0, sy, 1),
+            Vector3(1, sy, 1)
+        }
+    };
+
+    for (unsigned int side = 0; side < SIDE_COUNT; ++side) {
+        _model_side_vertices[side].resize(6);
+        DVector<Vector3>::Write w = _model_side_vertices[side].write();
+        for (unsigned int i = 0; i < 6; ++i) {
+            w[i] = vertices[side][i];
+        }
+    }
+}
+
+void Voxel::set_cube_uv_all_sides(Vector3 atlas_pos) {
+    // TODO
+}
+
+void Voxel::set_cube_uv_tbs_sides(Vector3 top_atlas_pos, Vector3 side_atlas_pos, Vector3 bottom_atlas_pos) {
+    // TODO
+}
+
+void Voxel::_bind_methods() {
+
+    ObjectTypeDB::bind_method(_MD("set_name", "name"), &Voxel::set_name);
+    ObjectTypeDB::bind_method(_MD("get_name"), &Voxel::get_name);
+
+    ObjectTypeDB::bind_method(_MD("set_id", "id"), &Voxel::set_id);
+    ObjectTypeDB::bind_method(_MD("get_id"), &Voxel::get_id);
+
+    ObjectTypeDB::bind_method(_MD("set_color", "color"), &Voxel::set_color);
+    ObjectTypeDB::bind_method(_MD("get_color"), &Voxel::get_color);
+
+    ObjectTypeDB::bind_method(_MD("set_cube_geometry", "height"), &Voxel::set_cube_geometry, DEFVAL(1.f));
+    // TODO
+
+}
+

voxel.h

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+#ifndef VOXEL_TYPE_H
+#define VOXEL_TYPE_H
+
+#include <reference.h>
+
+// Definition of one type of voxel.
+// A voxel can be a simple coloured cube, or a more complex model.
+class Voxel : public Reference {
+    OBJ_TYPE(Voxel, Reference)
+
+public:
+    enum Side {
+        SIDE_LEFT = 0,
+        SIDE_RIGHT,
+        SIDE_BOTTOM,
+        SIDE_TOP,
+        SIDE_BACK,
+        SIDE_FRONT,
+
+        SIDE_COUNT
+    };
+
+private:
+    int _id;
+    String _name;
+    int _material_id;
+    bool _is_transparent;
+
+    Color _color;
+    DVector<Vector3> _model_vertices;
+    DVector<Vector3> _model_normals;
+    DVector<Vector2> _model_uv;
+    DVector<Vector3> _model_side_vertices[SIDE_COUNT];
+    DVector<Vector2> _model_side_uv[SIDE_COUNT];
+
+    // TODO Child voxel types
+
+public:
+
+    Voxel();
+
+    _FORCE_INLINE_ void set_name(String name) { _name = name; }
+    _FORCE_INLINE_ String get_name() const { return _name; }
+
+    void set_id(int id);
+    _FORCE_INLINE_ int get_id() const { return _id; }
+
+    _FORCE_INLINE_ void set_color(Color color) { _color = color; }
+    _FORCE_INLINE_ Color get_color() const { return _color; }
+
+    _FORCE_INLINE_ void set_material_id(unsigned int id) { _material_id = id; }
+    _FORCE_INLINE_ unsigned int get_material_id() const { return _material_id; }
+
+    void set_cube_geometry(float sy = 1);
+    void set_cube_uv_all_sides(Vector3 atlas_pos);
+    void set_cube_uv_tbs_sides(Vector3 top_atlas_pos, Vector3 side_atlas_pos, Vector3 bottom_atlas_pos);
+
+    const DVector<Vector3> & get_model_vertices() const { return _model_vertices; }
+    const DVector<Vector3> & get_model_normals() const { return _model_normals; }
+    const DVector<Vector2> & get_model_uv() const { return _model_uv; }
+    const DVector<Vector3> & get_model_side_vertices(unsigned int side) const { return _model_side_vertices[side]; }
+    const DVector<Vector2> & get_model_side_uv(unsigned int side) const { return _model_side_uv[side]; }
+
+protected:
+    static void _bind_methods();
+
+};
+
+#endif // VOXEL_TYPE_H
+

voxel_buffer.cpp

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+#include "voxel_buffer.h"
+
+
+VoxelBuffer::VoxelBuffer() {
+
+}
+
+VoxelBuffer::~VoxelBuffer() {
+    clear();
+}
+
+void VoxelBuffer::create(int sx, int sy, int sz) {
+    if (sx <= 0 || sy <= 0 || sz <= 0) {
+        return;
+    }
+    Vector3i new_size(sx, sy, sz);
+    if (new_size != _size) {
+        for (unsigned int i = 0; i < MAX_CHANNELS; ++i) {
+            Channel & channel = _channels[i];
+            if (channel.data) {
+                // TODO Optimize with realloc
+                delete_channel(i, _size);
+                create_channel(i, new_size);
+            }
+        }
+        _size = new_size;
+    }
+}
+
+void VoxelBuffer::clear() {
+    for (unsigned int i = 0; i < MAX_CHANNELS; ++i) {
+        Channel & channel = _channels[i];
+        if (channel.data) {
+            delete_channel(i, _size);
+        }
+    }
+}
+
+void VoxelBuffer::clear_channel(unsigned int channel_index, int clear_value) {
+    ERR_FAIL_INDEX(channel_index, MAX_CHANNELS);
+    delete_channel(channel_index, _size);
+    _channels[channel_index].defval = clear_value;
+}
+
+int VoxelBuffer::get_voxel(int x, int y, int z, unsigned int channel_index) const {
+    ERR_FAIL_INDEX_V(channel_index,  MAX_CHANNELS, 0);
+    
+    x -= _offset.x;
+    y -= _offset.y;
+    z -= _offset.z;
+
+    const Channel & channel = _channels[channel_index];
+
+    if (validate_local_pos(x, y, z) && channel.data) {
+        return channel.data[z][x][y];
+    }
+    else {
+        return channel.defval;
+    }
+}
+
+int VoxelBuffer::get_voxel_local(int x, int y, int z, unsigned int channel_index) const {
+    ERR_FAIL_INDEX_V(channel_index, MAX_CHANNELS, 0);
+    
+    const Channel & channel = _channels[channel_index];
+
+    if (validate_local_pos(x, y, z) && channel.data) {
+        return channel.data[z][x][y];
+    }
+    else {
+        return channel.defval;
+    }
+}
+
+void VoxelBuffer::set_voxel(int value, int x, int y, int z, unsigned int channel_index) {
+    ERR_FAIL_INDEX(channel_index,  MAX_CHANNELS);
+
+    x -= _offset.x;
+    y -= _offset.y;
+    z -= _offset.z;
+
+    ERR_FAIL_COND(!validate_local_pos(x, y, z));
+
+    Channel & channel = _channels[channel_index];
+
+    if (channel.defval != value) {
+        if (channel.data == NULL) {
+            create_channel(channel_index, _size);
+        }
+        channel.data[z][x][y] = value;
+    }
+}
+
+void VoxelBuffer::set_voxel_v(int value, Vector3 pos, unsigned int channel_index) {
+    set_voxel(value, pos.x, pos.y, pos.z, channel_index);
+}
+
+void VoxelBuffer::fill(int defval, unsigned int channel_index) {
+    ERR_FAIL_INDEX(channel_index, MAX_CHANNELS);
+
+    Channel & channel = _channels[channel_index];
+    
+    for (unsigned int z = 0; z < _size.z; ++z) {
+        for (unsigned int x = 0; x < _size.x; ++x) {
+            uint8_t * column = channel.data[z][x];
+            for (unsigned int y = 0; y < _size.y; ++y) {
+                column[y] = defval;
+            }
+        }
+    }
+}
+
+bool VoxelBuffer::is_uniform(unsigned int channel_index) {
+    ERR_FAIL_INDEX_V(channel_index, MAX_CHANNELS, true);
+
+    Channel & channel = _channels[channel_index];
+    if (channel.data == NULL)
+        return true;
+    uint8_t voxel = channel.data[0][0][0];
+    for (unsigned int z = 0; z < _size.z; ++z) {
+        for (unsigned int x = 0; x < _size.x; ++x) {
+            uint8_t * column = channel.data[z][x];
+            for (unsigned int y = 0; y < _size.y; ++y) {
+                if (column[y] != voxel) {
+                    return false;
+                }
+            }
+        }
+    }
+    return true;
+}
+
+void VoxelBuffer::optimize() {
+    for (unsigned int i = 0; i < MAX_CHANNELS; ++i) {
+        if (_channels[i].data && is_uniform(i)) {
+            clear_channel(i, _channels[i].data[0][0][0]);
+        }
+    }
+}
+
+void VoxelBuffer::create_channel(int i, Vector3i size, uint8_t defval) {
+
+    Channel & channel = _channels[i];
+    channel.data = (uint8_t***)memalloc(size.z * sizeof(uint8_t**));
+
+    for (unsigned int z = 0; z < size.z; ++z) {
+
+        uint8_t ** plane = (uint8_t**)memalloc(size.x * sizeof(uint8_t*));
+        channel.data[z] = plane;
+
+        for (unsigned int x = 0; x < size.x; ++x) {
+
+            uint8_t * column = (uint8_t*)memalloc(size.y * sizeof(uint8_t));
+            plane[x] = column;
+
+            for (unsigned int y = 0; y < size.y; ++y) {
+                column[y] = defval;
+            }
+        }
+    }
+}
+
+void VoxelBuffer::delete_channel(int i, Vector3i size) {
+
+    Channel & channel = _channels[i];
+    
+    for (unsigned int z = 0; z < size.z; ++z) {
+        for (unsigned int x = 0; x < size.x; ++x) {
+            memfree(channel.data[z][x]);
+        }
+        memfree(channel.data[z]);
+    }
+    memfree(channel.data);
+    channel.data = NULL;
+}
+
+void VoxelBuffer::_bind_methods() {
+
+    ObjectTypeDB::bind_method(_MD("create", "sx", "sy", "sz"), &VoxelBuffer::create);
+    ObjectTypeDB::bind_method(_MD("clear"), &VoxelBuffer::clear);
+
+    ObjectTypeDB::bind_method(_MD("get_size_x"), &VoxelBuffer::get_size_x);
+    ObjectTypeDB::bind_method(_MD("get_size_y"), &VoxelBuffer::get_size_y);
+    ObjectTypeDB::bind_method(_MD("get_size_z"), &VoxelBuffer::get_size_z);
+
+    ObjectTypeDB::bind_method(_MD("get_offset_x"), &VoxelBuffer::get_offset_x);
+    ObjectTypeDB::bind_method(_MD("get_offset_y"), &VoxelBuffer::get_offset_y);
+    ObjectTypeDB::bind_method(_MD("get_offset_z"), &VoxelBuffer::get_offset_z);
+
+    ObjectTypeDB::bind_method(_MD("set_offset", "x", "y", "z"), &VoxelBuffer::set_offset);
+
+    ObjectTypeDB::bind_method(_MD("set_voxel", "value", "x", "y", "z", "channel"), &VoxelBuffer::set_voxel, DEFVAL(0));
+    ObjectTypeDB::bind_method(_MD("set_voxel_v", "value", "pos", "channel"), &VoxelBuffer::set_voxel, DEFVAL(0));
+    ObjectTypeDB::bind_method(_MD("get_voxel", "x", "y", "z", "channel"), &VoxelBuffer::set_voxel, DEFVAL(0));
+
+    ObjectTypeDB::bind_method(_MD("fill", "value", "channel"), &VoxelBuffer::fill, DEFVAL(0));
+
+    ObjectTypeDB::bind_method(_MD("is_uniform", "channel"), &VoxelBuffer::is_uniform, DEFVAL(0));
+    ObjectTypeDB::bind_method(_MD("optimize"), &VoxelBuffer::optimize);
+
+}
+

voxel_buffer.h

@@ -0,0 +1,86 @@
+#ifndef VOXEL_BUFFER_H
+#define VOXEL_BUFFER_H
+
+#include <reference.h>
+#include <vector.h>
+#include "vector3i.h"
+
+// Dense voxels data storage.
+// Organized in 8-bit channels like images, all optional.
+// Note: for float storage (marching cubes for example), you can map [0..256] to [0..1] and save 3 bytes per cell
+
+class VoxelBuffer : public Reference {
+    OBJ_TYPE(VoxelBuffer, Reference)
+
+    // Arbitrary value, 8 should be enough. Tweak for your needs.
+    static const int MAX_CHANNELS = 8;
+
+    struct Channel {
+        // Allocated when the channel is populated.
+        // Array of array of arrays, in order [z][x][y] because it makes vertical-wise access faster (the engine is Y-up).
+        uint8_t *** data;
+
+        uint8_t defval; // Default value when data is null
+        
+        Channel() : data(NULL), defval(0) {}
+    };
+
+    // Each channel can store arbitary data.
+    // For example, you can decide to store colors (R, G, B, A), gameplay types (type, state, light) or both.
+    Channel _channels[MAX_CHANNELS];
+
+    // How many voxels are there in the three directions. All populated channels have the same size.
+    Vector3i _size;
+
+    // Offset applied to coordinates when accessing voxels.
+    // Use _local versions to bypass this.
+    Vector3i _offset;
+
+public:
+    VoxelBuffer();
+    ~VoxelBuffer();
+
+    void create(int sx, int sy, int sz);
+    void clear();
+    void clear_channel(unsigned int channel_index, int clear_value=0);
+
+    _FORCE_INLINE_ int get_size_x() const { return _size.x; }
+    _FORCE_INLINE_ int get_size_y() const { return _size.y; }
+    _FORCE_INLINE_ int get_size_z() const { return _size.z; }
+
+    _FORCE_INLINE_ int get_offset_x() const { return _offset.x; }
+    _FORCE_INLINE_ int get_offset_y() const { return _offset.y; }
+    _FORCE_INLINE_ int get_offset_z() const { return _offset.z; }
+
+    _FORCE_INLINE_ void set_offset(int x, int y, int z) { _offset = Vector3i(x,y,z); }
+
+    int get_voxel(int x, int y, int z, unsigned int channel_index=0) const;
+    int get_voxel_local(int x, int y, int z, unsigned int channel_index=0) const;
+    void set_voxel(int value, int x, int y, int z, unsigned int channel_index=0);
+    void set_voxel_v(int value, Vector3 pos, unsigned int channel_index = 0);
+
+    void fill(int defval, unsigned int channel_index = 0);
+
+    bool is_uniform(unsigned int channel_index = 0);
+
+    void optimize();
+
+    //void copy_from(Ref<VoxelBuffer> other);
+
+    _FORCE_INLINE_ bool validate_local_pos(unsigned int x, unsigned int y, unsigned int z) const {
+        return x < _size.x
+            && y < _size.y
+            && z < _size.x;
+    }
+
+private:
+    void create_channel(int i, Vector3i size, uint8_t defval=0);
+    void delete_channel(int i, Vector3i size);
+
+protected:
+    static void _bind_methods();
+
+};
+
+#endif // VOXEL_BUFFER_H
+

voxel_mesh_builder.cpp

@@ -0,0 +1,123 @@
+#include "voxel_mesh_builder.h"
+
+static const Vector3i g_side_normals[Voxel::SIDE_COUNT] = {
+    Vector3i(-1, 0, 0),
+    Vector3i(1, 0, 0),
+    Vector3i(0, -1, 0),
+    Vector3i(0, 1, 0),
+    Vector3i(0, 0, -1),
+    Vector3i(0, 0, 1),
+};
+
+VoxelMeshBuilder::VoxelMeshBuilder() {
+
+}
+
+void VoxelMeshBuilder::add_voxel_type(Ref<Voxel> voxel) {
+    ERR_FAIL_COND(voxel.is_null());
+    ERR_FAIL_COND(voxel->get_id() >= MAX_VOXEL_TYPES);
+    ERR_FAIL_COND(voxel->get_material_id() >= MAX_MATERIALS);
+    unsigned int id = voxel->get_id();
+    _voxel_types[id] = voxel;
+}
+
+void VoxelMeshBuilder::set_material(Ref<Material> material, unsigned int id) {
+    ERR_FAIL_COND(id >= MAX_MATERIALS);
+    _materials[id] = material;
+    _surface_tool[id].set_material(material);
+}
+
+Ref<Mesh> VoxelMeshBuilder::build(Ref<VoxelBuffer> buffer_ref) {
+    ERR_FAIL_COND_V(buffer_ref.is_null(), Ref<Mesh>());
+
+    const VoxelBuffer & buffer = **buffer_ref;
+
+    for (unsigned int i = 0; i < MAX_MATERIALS; ++i) {
+        _surface_tool[i].begin(Mesh::PRIMITIVE_TRIANGLES);
+    }
+
+    // Iterate 3D padded data to extract voxel faces.
+    // This is the most intensive job in this class, so all required data should be as fit as possible.
+    for (unsigned int z = 1; z < buffer.get_size_z()-1; ++z) {
+        for (unsigned int x = 1; x < buffer.get_size_x()-1; ++x) {
+            for (unsigned int y = 1; y < buffer.get_size_y()-1; ++y) {
+
+                int voxel_id = buffer.get_voxel_local(x, y, z, 0);
+
+                if (voxel_id != 0 && !_voxel_types[voxel_id].is_null()) {
+
+                    const Voxel & voxel = **_voxel_types[voxel_id];
+
+                    SurfaceTool & st = _surface_tool[voxel.get_material_id()];
+
+                    // Hybrid approach: extract cube faces and decimate those that aren't visible,
+                    // and still allow voxels to have geometry that is not a cube
+
+                    // Sides
+                    for (unsigned int side = 0; side < Voxel::SIDE_COUNT; ++side) {
+
+                        const DVector<Vector3> & vertices = voxel.get_model_side_vertices(side);
+                        if (vertices.size() != 0) {
+
+                            Vector3i normal = g_side_normals[side];
+                            unsigned nx = x + normal.x;
+                            unsigned ny = y + normal.y;
+                            unsigned nz = z + normal.z;
+
+                            int neighbor_voxel_id = buffer.get_voxel_local(nx, ny, nz, 0);
+                            // TODO Better face visibility test
+                            if (neighbor_voxel_id == 0) {
+
+                                DVector<Vector3>::Read r = vertices.read();
+                                Vector3 pos(x - 1, y - 1, z - 1);
+
+                                for (unsigned int i = 0; i < vertices.size(); ++i) {
+                                    st.add_normal(Vector3(normal.x, normal.y, normal.z));
+                                    st.add_vertex(r[i] + pos);
+                                }
+                            }
+                        }
+                    }
+
+                    // Inside
+                    if (voxel.get_model_vertices().size() != 0) {
+
+                        const DVector<Vector3> & vertices = voxel.get_model_vertices();
+                        DVector<Vector3>::Read rv = voxel.get_model_vertices().read();
+                        DVector<Vector3>::Read rn = voxel.get_model_normals().read();
+                        Vector3 pos(x - 1, y - 1, z - 1);
+
+                        for (unsigned int i = 0; i < vertices.size(); ++i) {
+                            st.add_normal(rn[i]);
+                            st.add_vertex(rv[i] + pos);
+                        }
+                    }
+
+                }
+
+            }
+        }
+    }
+
+    // Commit mesh
+    Ref<Mesh> mesh_ref = _surface_tool[0].commit();
+    _surface_tool[0].clear();
+    for (unsigned int i = 1; i < MAX_MATERIALS; ++i) {
+        if (_materials[i].is_valid()) {
+            SurfaceTool & st = _surface_tool[i];
+            st.commit(mesh_ref);
+            st.clear();
+        }
+    }
+
+    return mesh_ref;
+}
+
+void VoxelMeshBuilder::_bind_methods() {
+
+    ObjectTypeDB::bind_method(_MD("add_voxel_type", "voxel"), &VoxelMeshBuilder::add_voxel_type);
+    ObjectTypeDB::bind_method(_MD("set_material", "material", "id"), &VoxelMeshBuilder::set_material);
+    ObjectTypeDB::bind_method(_MD("build", "voxel_buffer"), &VoxelMeshBuilder::build);
+
+}
+

voxel_mesh_builder.h

@@ -0,0 +1,35 @@
+#ifndef VOXEL_MESH_BUILDER
+#define VOXEL_MESH_BUILDER
+
+#include <reference.h>
+#include <scene/resources/mesh.h>
+#include <scene/resources/surface_tool.h>
+#include "voxel.h"
+#include "voxel_buffer.h"
+
+class VoxelMeshBuilder : public Reference {
+    OBJ_TYPE(VoxelMeshBuilder, Reference);
+
+    static const unsigned int MAX_VOXEL_TYPES = 256; // Required limit because voxel types are stored in 8 bits
+    static const unsigned int MAX_MATERIALS = 8; // Arbitrary. Tweak if needed.
+
+    Ref<Voxel> _voxel_types[MAX_VOXEL_TYPES];
+    Ref<Material> _materials[MAX_MATERIALS];
+    SurfaceTool _surface_tool[MAX_MATERIALS];
+
+public:
+
+    VoxelMeshBuilder();
+
+    void add_voxel_type(Ref<Voxel> voxel);
+    void set_material(Ref<Material> material, unsigned int id);
+
+    Ref<Mesh> build(Ref<VoxelBuffer> buffer_ref);
+    
+protected:
+    static void _bind_methods();
+
+};
+
+
+#endif // VOXEL_MESH_BUILDER