From 1c13313ec845d43077bd7e78538358ca4e007f8a Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Mon, 20 Mar 2023 06:29:31 +0100
Subject: sort entities by id rather than draw order

---
 draw/anim.cpp | 9 ++++-----
 draw/anim.hpp | 7 +++++--
 2 files changed, 9 insertions(+), 7 deletions(-)

(limited to 'draw')

diff --git a/draw/anim.cpp b/draw/anim.cpp
index 60e9b54c..afdaa344 100644
--- a/draw/anim.cpp
+++ b/draw/anim.cpp
@@ -48,12 +48,10 @@ void anim_mesh::add_clickable(tile_shader& shader, const Vector2i& win_size, con
 void anim_mesh::draw(tile_shader& shader, chunk& c)
 {
     constexpr auto quad_index_count = 6;
-    auto [mesh_] = c.ensure_scenery_mesh();
-    const auto& es = c.entities();
+
+    auto [mesh_, es, size] = c.ensure_scenery_mesh(_draw_array);
     GL::MeshView mesh{mesh_};
     [[maybe_unused]] size_t draw_count = 0;
-
-    const auto size = es.size();
     const auto max_index = uint32_t(size*quad_index_count - 1);
 
     const auto do_draw = [&](size_t from, size_t to, anim_atlas* atlas) {
@@ -75,7 +73,8 @@ void anim_mesh::draw(tile_shader& shader, chunk& c)
 
     for (auto k = 0_uz; k < size; k++)
     {
-        const auto& e = *es[k];
+        fm_assert(es[k].e);
+        const auto& e = *es[k].e;
         auto& atlas = *e.atlas;
         if (last && &atlas != last.atlas)
         {
diff --git a/draw/anim.hpp b/draw/anim.hpp
index 632a89e3..9f279b38 100644
--- a/draw/anim.hpp
+++ b/draw/anim.hpp
@@ -1,7 +1,9 @@
 #pragma once
 #include "local-coords.hpp"
 #include "rotation.hpp"
+#include "chunk.hpp"
 #include <array>
+#include <Corrade/Containers/Array.h>
 #include <Corrade/Containers/ArrayViewStl.h>
 #include <Magnum/Magnum.h>
 #include <Magnum/Math/Vector2.h>
@@ -30,6 +32,8 @@ struct anim_mesh final
     static void add_clickable(tile_shader& shader, const Vector2i& win_size, const std::shared_ptr<entity>& s, std::vector<clickable>& list);
 
 private:
+    static std::array<UnsignedShort, 6> make_index_array();
+
     struct vertex_data final {
         Vector3 position;
         Vector2 texcoords;
@@ -37,8 +41,7 @@ private:
     };
     using quad_data = std::array<vertex_data, 4>;
 
-    static std::array<UnsignedShort, 6> make_index_array();
-
+    Array<typename chunk::draw_entity> _draw_array;
     GL::Mesh _mesh;
     GL::Buffer _vertex_buffer{quad_data{}, Magnum::GL::BufferUsage::DynamicDraw},
                _index_buffer{make_index_array()};
-- 
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