fixes

include/rendering/batches/mesh_batch.hpp

@@ -0,0 +1,55 @@
+#pragma once
+
+#include <vector>
+#include <span>
+#include "opengl/handles/mesh_handle.hpp"
+#include "opengl/handles/matrix_handles.hpp"
+#include "opengl/handles/texture_handle.hpp"
+#include "opengl/handles/mesh_handle.hpp"
+#include "opengl/handles/material_handle.hpp"
+#include "geometry/aabb.hpp"
+
+class mesh_batch
+{
+public:
+	using id_type = ztu::u32;
+
+	inline id_type add(
+		const zgl::mesh_handle& mesh,
+		const aabb& bounding_box,
+		const zgl::model_matrix_handle& transform,
+		const zgl::material_handle& material
+	);
+
+	inline std::optional<aabb> bounding_box(id_type id);
+
+	inline bool remove(id_type id);
+
+	[[nodiscard]] inline std::span<const zgl::mesh_handle> meshes() const;
+
+	[[nodiscard]] inline std::span<const aabb> bounding_boxes() const;
+
+	[[nodiscard]] inline std::span<const zgl::model_matrix_handle> transforms() const;
+
+	[[nodiscard]] inline std::span<const zgl::texture_handle> textures() const;
+
+	[[nodiscard]] inline std::span<const zgl::surface_properties_handle> surface_properties() const;
+
+	[[nodiscard]] inline std::span<const zgl::alpha_handle> alphas() const;
+
+private:
+	std::vector<zgl::mesh_handle> m_meshes{};
+	std::vector<aabb> m_bounding_boxes{};
+	std::vector<zgl::model_matrix_handle> m_transforms{};
+	std::vector<zgl::texture_handle> m_textures{};
+	std::vector<zgl::surface_properties_handle> m_surface_properties{};
+	std::vector<zgl::alpha_handle> m_alphas{};
+
+	std::vector<id_type> m_id_lookup{};
+
+	id_type m_next_mesh_id{ 0 };
+};
+
+#define INCLUDE_MESH_BATCH_IMPLEMENTATION
+#include "rendering/batches/mesh_batch.ipp"
+#undef INCLUDE_MESH_BATCH_IMPLEMENTATION