Added count getter for mesher indexed materials.

Not used yet, but may be useful to implement shader materials with
VoxelLodTerrain and blocky mesher

meshers/blocky/voxel_blocky_library_base.cpp

@@ -45,6 +45,10 @@ Ref<Material> VoxelBlockyLibraryBase::get_material_by_index(unsigned int index)
  return _indexed_materials[index];
 }
 
+unsigned int VoxelBlockyLibraryBase::get_material_index_count() const {
+ return _indexed_materials.size();
+}
+
 #ifdef TOOLS_ENABLED
 
 void VoxelBlockyLibraryBase::get_configuration_warnings(PackedStringArray &out_warnings) const {

meshers/blocky/voxel_blocky_library_base.h

@@ -82,6 +82,7 @@ class VoxelBlockyLibraryBase : public Resource {
  }
 
  Ref<Material> get_material_by_index(unsigned int index) const;
+ unsigned int get_material_index_count() const;
 
 #ifdef TOOLS_ENABLED
  virtual void get_configuration_warnings(PackedStringArray &out_warnings) const;

meshers/blocky/voxel_mesher_blocky.cpp

@@ -881,6 +881,14 @@ Ref<Material> VoxelMesherBlocky::get_material_by_index(unsigned int index) const
  return lib->get_material_by_index(index);
 }
 
+unsigned int VoxelMesherBlocky::get_material_index_count() const {
+ Ref<VoxelBlockyLibraryBase> lib = get_library();
+ if (lib.is_null()) {
+ return 0;
+ }
+ return lib->get_material_index_count();
+}
+
 #ifdef TOOLS_ENABLED
 
 void VoxelMesherBlocky::get_configuration_warnings(PackedStringArray &out_warnings) const {

meshers/blocky/voxel_mesher_blocky.h

@@ -47,6 +47,7 @@ class VoxelMesherBlocky : public VoxelMesher {
  }
 
  Ref<Material> get_material_by_index(unsigned int index) const override;
+ unsigned int get_material_index_count() const override;
 
  // Using std::vector because they make this mesher twice as fast than Godot Vectors.
  // See why: https://github.com/godotengine/godot/issues/24731

meshers/cubes/voxel_mesher_cubes.cpp

@@ -1126,6 +1126,10 @@ Ref<Material> VoxelMesherCubes::get_material_by_index(unsigned int i) const {
  return _materials[i];
 }
 
+unsigned int VoxelMesherCubes::get_material_index_count() const {
+ return _materials.size();
+}
+
 void VoxelMesherCubes::_b_set_opaque_material(Ref<Material> material) {
  set_material_by_index(MATERIAL_OPAQUE, material);
 }

meshers/cubes/voxel_mesher_cubes.h

@@ -70,6 +70,7 @@ class VoxelMesherCubes : public VoxelMesher {
 
  void set_material_by_index(Materials id, Ref<Material> material);
  Ref<Material> get_material_by_index(unsigned int i) const override;
+ unsigned int get_material_index_count() const override;
 
  static Ref<Mesh> generate_mesh_from_image(Ref<Image> image, float voxel_size);
 

meshers/voxel_mesher.cpp

@@ -152,6 +152,11 @@ Ref<Material> VoxelMesher::get_material_by_index(unsigned int i) const {
  return Ref<Material>();
 }
 
+unsigned int VoxelMesher::get_material_index_count() const {
+ // May be implemented in some meshers
+ return 0;
+}
+
 bool VoxelMesher::is_mesh_empty(const StdVector<Output::Surface> &surfaces) {
  if (surfaces.size() == 0) {
  return true;

meshers/voxel_mesher.h

@@ -106,6 +106,8 @@ class VoxelMesher : public Resource {
  // index does not have a material assigned. If not provided here, a default material may be used.
  // An error can be produced if the index is out of bounds.
  virtual Ref<Material> get_material_by_index(unsigned int i) const;
+ // Get the highest+1 material index
+ virtual unsigned int get_material_index_count() const;
 
 #ifdef TOOLS_ENABLED
  // If the mesher has problems, messages may be returned by this method so they can be shown to the user.