From 3b7d593f4e1d59cc53b701734bbdf68e4165fa78 Mon Sep 17 00:00:00 2001
From: Sven Balzer <4653051+Kyuusokuna@users.noreply.github.com>
Date: Wed, 1 Apr 2026 18:01:39 +0200
Subject: [PATCH] switch to reverse z and get rid of tilt sign flip

---
 src/math_graphics.cpp | 38 +++++++++++++++++++-------------------
 1 file changed, 19 insertions(+), 19 deletions(-)

diff --git a/src/math_graphics.cpp b/src/math_graphics.cpp
index 810943e..0ba2573 100644
--- a/src/math_graphics.cpp
+++ b/src/math_graphics.cpp
@@ -874,27 +874,27 @@ namespace M {
     }
 
     M4x4 view(V3 player_pos, float tilt, float camera_distance) {
-        float s = sinf(-tilt);
-        float c = cosf(-tilt);
+        float s = sinf(tilt);
+        float c = cosf(tilt);
         
-        return M4x4_(
+        return {
             1,  0, 0,                      -player_pos.x,
             0,  c, s,                  c * -player_pos.y,
-            0, -s, c, s * player_pos.y + camera_distance,
-            0,  0, 0,                                  1
-        );
+            0, -s, c, s * player_pos.y - camera_distance,
+            0,  0, 0,                                  1,
+        };
     }
 
     M4x4 inverse_view(V3 player_pos, float tilt, float camera_distance) {
-        float s = sinf(-tilt);
-        float c = cosf(-tilt);
+        float s = sinf(tilt);
+        float c = cosf(tilt);
         
-        return M4x4_(
-            1,  0,  0,                       player_pos.x,
-            0,  c, -s, s * camera_distance + player_pos.y,
-            0,  s,  c,               c * -camera_distance,
-            0,  0,  0,                                  1
-        );
+        return {
+            1,  0,  0,                        player_pos.x,
+            0,  c, -s, -s * camera_distance + player_pos.y,
+            0,  s,  c,                 c * camera_distance,
+            0,  0,  0,                                   1,
+        };
     }
 
     M4x4 projection(float fovy, float aspect, float near) {
@@ -904,7 +904,7 @@ namespace M {
             g / aspect, 0, 0,    0,
                      0, g, 0,    0,
                      0, 0, 0, near,
-                     0, 0, 1,    0,
+                     0, 0, -1,   0,
         };
     }
 
@@ -912,10 +912,10 @@ namespace M {
         float g = 1.0 / tanf(fovy * 0.5);
     
         return {
-            aspect / g,     0,        0, 0,
-                     0, 1 / g,        0, 0,
-                     0,     0,        0, 1,
-                     0,     0, 1 / near, 0,
+            aspect / g,     0,        0,  0,
+                     0, 1 / g,        0,  0,
+                     0,     0,        0, -1,
+                     0,     0, 1 / near,  0,
         };
     }
 }