From 903e1644fce5652a621803a6eb3617d605d22434 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Wed, 12 Apr 2023 00:08:56 +0200
Subject: wip

---
 shaders/tile.cpp | 2 +-
 shaders/tile.hpp | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

(limited to 'shaders')

diff --git a/shaders/tile.cpp b/shaders/tile.cpp
index 8d859ff3..d5f6b7d3 100644
--- a/shaders/tile.cpp
+++ b/shaders/tile.cpp
@@ -74,7 +74,7 @@ void tile_shader::_draw()
 
 float tile_shader::depth_value(const local_coords& xy, float offset) noexcept
 {
-    return (xy.to_index() + offset)*depth_tile_size;
+    return depth_tile_size + (xy.to_index() + offset)*depth_tile_size;
 }
 
 } // namespace floormat
diff --git a/shaders/tile.hpp b/shaders/tile.hpp
index 4bf78d09..fd3788f3 100644
--- a/shaders/tile.hpp
+++ b/shaders/tile.hpp
@@ -37,8 +37,9 @@ struct tile_shader : GL::AbstractShaderProgram
     template<typename T, typename... Xs>
     decltype(auto) draw(T&& mesh, Xs&&... xs);
 
-    static constexpr float depth_tile_size = 1.f/(256 * TILE_COUNT);
-    static constexpr float wall_depth_offset = .125f, scenery_depth_offset = .25f, character_depth_offset = .5f;
+    static constexpr float depth_tile_size = 3.56e-15; // 1 - nextafter(1, 0) * TILE_MAX_DIM / 2
+    static constexpr float depth_start = -1 + depth_tile_size;
+    static constexpr float scenery_depth_offset = .5f, character_depth_offset = .5f;
 
 private:
     void _draw();
-- 
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