Added a new MeshMerger class. It's based on VoxelMesher.

SCsub

@@ -4,14 +4,14 @@ Import('env')
 
 module_env = env.Clone()
 
-#Should work with just arrays
-#if os.path.isdir('../mesh_data_resource'):
-#    module_env.Append(CPPDEFINES=['MESH_DATA_RESOURCE_PRESENT'])
+if os.path.isdir('../mesh_data_resource'):
+    module_env.Append(CPPDEFINES=['MESH_DATA_RESOURCE_PRESENT'])
 
 sources = [
 
     "register_types.cpp",
     "mesh_utils.cpp",
+    "mesh_merger.cpp",
     "fast_quadratic_mesh_simplifier.cpp",
 ]
 

defines.h

@@ -0,0 +1,120 @@
+
+#ifndef MESH_UTILS_DEFINES_H
+#define MESH_UTILS_DEFINES_H
+
+#include "core/version.h"
+
+#if VERSION_MAJOR >= 4
+#define GODOT4 true
+#endif
+
+//includes
+#if GODOT4
+#define core_input_h "core/input/input_event.h"
+#define spatial_editor_plugin_h "editor/plugins/node_3d_editor_plugin.h"
+#define camera_h "scene/3d/camera_3d.h"
+#define spatial_h "scene/3d/node_3d.h"
+#define navigation_h "scene/3d/navigation_3d.h"
+#define light_h "scene/3d/light_3d.h"
+#define visual_server_h "servers/rendering_server.h"
+#define mesh_instance_h "scene/3d/mesh_instance_3d.h"
+#define pool_vector_h "core/vector.h"
+#define physics_server_h "servers/physics_server_3d.h"
+#define immediate_geometry_h "scene/3d/immediate_geometry_3d.h"
+#define include_pool_vector \
+	template <class N>      \
+	class Vector;           \
+	template <class N>      \
+	using PoolVector = Vector<N>;
+#else
+#define core_input_h "core/os/input.h"
+#define spatial_editor_plugin_h "editor/plugins/spatial_editor_plugin.h"
+#define camera_h "scene/3d/camera.h"
+#define spatial_h "scene/3d/spatial.h"
+#define navigation_h "scene/3d/navigation.h"
+#define light_h "scene/3d/light.h"
+#define visual_server_h "servers/visual_server.h"
+#define mesh_instance_h "scene/3d/mesh_instance.h"
+#define pool_vector_h "core/pool_vector.h"
+#define physics_server_h "servers/physics_server.h"
+#define immediate_geometry_h "scene/3d/immediate_geometry.h"
+#define include_pool_vector
+#endif
+
+//Type Defines
+#if GODOT4
+#define PhysicsDirectSpaceState PhysicsDirectSpaceState3D
+#define SpatialEditor Node3DEditor
+#define SpatialEditorPlugin Node3DEditorPlugin
+#define SpatialEditorViewport Node3DEditorViewport
+#define PoolStringArray PackedStringArray
+#define REAL FLOAT
+#define POOL_STRING_ARRAY PACKED_STRING_ARRAY
+#define POOL_BYTE_ARRAY PACKED_BYTE_ARRAY
+#define Spatial Node3D
+#define SpatialMaterial StandardMaterial3D
+#define PoolVector3Array PackedVector3Array
+#define PoolVector2Array PackedVector2Array
+#define PoolColorArray PackedColorArray
+#define PoolIntArray PackedInt64Array
+#define PoolRealArray PackedFloat32Array
+#define PoolByteArray PackedByteArray
+#define MeshInstance MeshInstance3D
+#define Camera Camera3D
+
+typedef class World3D World;
+
+#define DirectionalLight DirectionalLight3D
+
+typedef class ImmediateGeometry3D ImmediateGeometry;
+typedef class Navigation3D Navigation;
+typedef class PhysicsServer3D PhysicsServer;
+typedef class RenderingServer VisualServer;
+typedef class RenderingServer VS;
+//typedef class StandardMaterial3D SpatialMaterial;
+
+//toodo figure out a way to have this
+//#define Variant::CallError Callable::CallError
+#endif
+
+#if GODOT4
+
+#define VARIANT_ARRAY_GET(arr)             \
+	Vector<Variant> r;                     \
+	for (int i = 0; i < arr.size(); i++) { \
+		r.push_back(arr[i]);               \
+	}                                      \
+	return r;
+
+#else
+
+#define VARIANT_ARRAY_GET(arr)             \
+	Vector<Variant> r;                     \
+	for (int i = 0; i < arr.size(); i++) { \
+		r.push_back(arr[i].get_ref_ptr()); \
+	}                                      \
+	return r;
+
+#endif
+
+#define VARIANT_ARRAY_SET(arr, arr_into, type) \
+	arr_into.clear();                          \
+	for (int i = 0; i < arr.size(); i++) {     \
+		Ref<type> e = Ref<type>(arr[i]);       \
+		arr_into.push_back(e);                 \
+	}
+
+#if GODOT4
+//TODO do this properly
+#define INSTANCE_VALIDATE(var) var
+#define CONNECT(sig, obj, target_method_class, method) connect(sig, callable_mp(obj, &target_method_class::method))
+#define DISCONNECT(sig, obj, target_method_class, method) disconnect(sig, callable_mp(obj, &target_method_class::method))
+#define GET_WORLD get_world_3d
+#else
+#define INSTANCE_VALIDATE(var) ObjectDB::instance_validate(var)
+#define CONNECT(sig, obj, target_method_class, method) connect(sig, obj, #method)
+#define DISCONNECT(sig, obj, target_method_class, method) disconnect(sig, obj, #method)
+#define GET_WORLD get_world
+#endif
+
+#endif

mesh_merger.h

@@ -0,0 +1,197 @@
+/*
+
+Copyright (c) 2020 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.
+
+*/
+
+#ifndef MESH_MERGER_H
+#define MESH_MERGER_H
+
+#include "core/reference.h"
+
+#include "defines.h"
+
+#include pool_vector_h
+include_pool_vector
+
+#include mesh_instance_h
+
+#include "core/color.h"
+#include "core/math/rect2.h"
+#include "core/math/vector2.h"
+#include "core/math/vector3.h"
+#include "core/vector.h"
+#include "scene/main/node.h"
+#include "scene/resources/material.h"
+#include "scene/resources/mesh.h"
+
+#ifdef MESH_DATA_RESOURCE_PRESENT
+#include "../mesh_data_resource/mesh_data_resource.h"
+#endif
+
+		class MeshMerger : public Reference {
+	GDCLASS(MeshMerger, Reference);
+
+public:
+	struct Vertex {
+
+		Vector3 vertex;
+		Color color;
+		Vector3 normal; // normal, binormal, tangent
+		Vector3 binormal;
+		Vector3 tangent;
+		Vector2 uv;
+		Vector2 uv2;
+		Vector<int> bones;
+		Vector<float> weights;
+
+		bool operator==(const Vertex &p_vertex) const;
+
+		Vertex() {}
+	};
+
+	struct VertexHasher {
+		static _FORCE_INLINE_ uint32_t hash(const Vertex &p_vtx);
+	};
+
+	struct WeightSort {
+		int index;
+		float weight;
+		bool operator<(const WeightSort &p_right) const {
+			return weight < p_right.weight;
+		}
+	};
+
+public:
+	int get_mesher_index() const;
+	void set_mesher_index(const int value);
+
+	int get_format() const;
+	void set_format(const int value);
+
+	Ref<Material> get_material();
+	void set_material(const Ref<Material> &material);
+
+	float get_ao_strength() const;
+	void set_ao_strength(const float value);
+
+	float get_base_light_value() const;
+	void set_base_light_value(const float value);
+
+	float get_voxel_scale() const;
+	void set_voxel_scale(const float voxel_scale);
+
+	int get_lod_size() const;
+	void set_lod_size(const int lod_size);
+
+	Rect2 get_uv_margin() const;
+	void set_uv_margin(const Rect2 margin);
+
+	void reset();
+
+#ifdef MESH_DATA_RESOURCE_PRESENT
+	void add_mesh_data_resource(Ref<MeshDataResource> mesh, const Transform transform = Transform(), const Rect2 uv_rect = Rect2(0, 0, 1, 1));
+	void add_mesh_data_resource_bone(Ref<MeshDataResource> mesh, const Vector<int> &bones, const Vector<float> &weights, const Transform transform = Transform(), const Rect2 uv_rect = Rect2(0, 0, 1, 1));
+#endif
+
+	void add_mesher(const Ref<MeshMerger> &mesher);
+
+	PoolVector<Vector3> build_collider() const;
+
+	Array build_mesh();
+	void build_mesh_into(RID mesh);
+
+	void generate_normals(bool p_flip = false);
+	void remove_doubles();
+	void remove_doubles_hashed();
+
+	PoolVector<Vector3> get_vertices() const;
+	void set_vertices(const PoolVector<Vector3> &values);
+	int get_vertex_count() const;
+	Vector3 get_vertex(const int idx) const;
+	void remove_vertex(const int idx);
+	void add_vertex(const Vector3 &vertex);
+
+	PoolVector<Vector3> get_normals() const;
+	void set_normals(const PoolVector<Vector3> &values);
+	Vector3 get_normal(const int idx) const;
+	void add_normal(const Vector3 &normal);
+
+	PoolVector<Color> get_colors() const;
+	void set_colors(const PoolVector<Color> &values);
+	Color get_color(const int idx) const;
+	void add_color(const Color &color);
+
+	PoolVector<Vector2> get_uvs() const;
+	void set_uvs(const PoolVector<Vector2> &values);
+	Vector2 get_uv(const int idx) const;
+	void add_uv(const Vector2 &vector);
+
+	PoolVector<Vector2> get_uv2s() const;
+	void set_uv2s(const PoolVector<Vector2> &values);
+	Vector2 get_uv2(const int idx) const;
+	void add_uv2(const Vector2 &vector);
+
+	Vector<int> get_bones(const int idx) const;
+	void add_bones(const Vector<int> &arr);
+
+	Vector<float> get_bone_weights(const int idx) const;
+	void add_bone_weights(const Vector<float> &arr);
+
+	PoolVector<int> get_indices() const;
+	void set_indices(const PoolVector<int> &values);
+	int get_indices_count() const;
+	int get_index(const int idx) const;
+	void remove_index(const int idx);
+	void add_indices(const int index);
+
+	MeshMerger();
+	~MeshMerger();
+
+protected:
+	static void _bind_methods();
+
+	int _mesher_index;
+
+	int _format;
+
+	PoolVector<Vertex> _vertices;
+	PoolVector<int> _indices;
+
+	Color _last_color;
+	Vector3 _last_normal;
+	Vector2 _last_uv;
+	Vector2 _last_uv2;
+	Vector<int> _last_bones;
+	Vector<float> _last_weights;
+	Plane _last_tangent;
+
+	Ref<Material> _material;
+
+	float _voxel_scale;
+	int _lod_size;
+
+	float _ao_strength;
+	float _base_light_value;
+	Rect2 _uv_margin;
+};
+
+#endif

register_types.cpp

@@ -26,12 +26,14 @@ SOFTWARE.
 
 #include "core/engine.h"
 #include "fast_quadratic_mesh_simplifier.h"
+#include "mesh_merger.h"
 #include "mesh_utils.h"
 
 static MeshUtils *mesh_utils = NULL;
 
 void register_mesh_utils_types() {
 	ClassDB::register_class<FastQuadraticMeshSimplifier>();
+	ClassDB::register_class<MeshMerger>();
 
 	mesh_utils = memnew(MeshUtils);
 	ClassDB::register_class<MeshUtils>();