Switch to Blinn-Phong shading

1 files changed, 2 insertions, 2 deletions

diff --git a/shaders/obj.frag.slang b/shaders/obj.frag.slang
index 8feab73..33596e3 100644
--- a/shaders/obj.frag.slang
+++ b/shaders/obj.frag.slang
@@ -35,10 +35,10 @@ FSOutput main(FSInput input) {
     float3 light_direction   = normalize(float3(-0.45, 0.75, 0.55));
     float3 normal            = normalize(input.normal);
     float3 view_direction    = normalize(input.camera_position - input.world_position);
-    float3 reflect_direction = reflect(-light_direction, normal);
+    float3 halfway_direction = normalize(light_direction + view_direction);
 
     float diffuse  = max(dot(normal, light_direction), 0.0);
-    float specular = diffuse > 0.0 ? pow(max(dot(view_direction, reflect_direction), 0.0), shininess) : 0.0;
+    float specular = diffuse > 0.0 ? pow(max(dot(normal, halfway_direction), 0.0), shininess) : 0.0;
 
     float shade = saturate(ambient_strength + diffuse * diffuse_strength + specular * specular_strength);
     FSOutput output;