From 567afc66d2633e725d0dd74a5022902f3467068c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dominik=20Madar=C3=A1sz?= <zaklaus@outlook.com>
Date: Mon, 2 Sep 2024 16:00:21 +0200
Subject: [PATCH] grab up axis from camera view mat

---
 engine/art/shaderlib/shadowmap.glsl | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/engine/art/shaderlib/shadowmap.glsl b/engine/art/shaderlib/shadowmap.glsl
index bf536b4..fb96eb8 100644
--- a/engine/art/shaderlib/shadowmap.glsl
+++ b/engine/art/shaderlib/shadowmap.glsl
@@ -39,7 +39,8 @@ float shadow_vsm(float distance, vec3 dir, int light_index, float min_variance,
     vec2 tex_size = textureSize(shadowMap[light_index], 0);
     vec3 texelSize = 1.0 / vec3(tex_size.xyy);
     vec3 light_plane_normal = normalize(dir);
-    vec3 tangent = normalize(cross(light_plane_normal, vec3(0.0, 1.0, 0.0)));
+    vec3 up_axis = normalize(view[1].xyz);
+    vec3 tangent = normalize(cross(light_plane_normal, up_axis));
     vec3 bitangent = cross(light_plane_normal, tangent);
 
     for (int i = 0; i < 4; i++) {