Simple normal map implementation

shaders/triangle.frag

@@ -15,13 +15,14 @@ layout(binding = 2) uniform sampler2D normal_tex;
 layout(location = 0) in vec2 tex_coords;
 layout(location = 1) in vec3 normal_wld;
 layout(location = 2) in vec3 position_wld;
+layout(location = 3) in mat3 tbn;
 
 layout(location = 0) out vec4 out_color;
 
 void main() {
-//    vec3 normal_cam_u = normalize(normal_wld); // TODO
     vec3 normal_cam_u = texture(normal_tex, tex_coords).rgb;
-    normal_cam_u = normalize(normal_cam_u * 2.0 - 1.0);
+    normal_cam_u = normal_cam_u * 2.0 - 1.0;
+    normal_cam_u = normalize(tbn * normal_cam_u);
     vec3 light_direction_cam_u = normalize(ubo.light_position - position_wld);
 
     float ambient_strength = 0.1;