added models and stuff

resources/backpack/backpack.mtl

@@ -1,16 +0,0 @@
-# Blender MTL File: 'None'
-# Material Count: 1
-
-newmtl Scene_-_Root
-Ns 225.000000
-Ka 1.000000 1.000000 1.000000
-Kd 0.800000 0.800000 0.800000
-Ks 0.500000 0.500000 0.500000
-Ke 0.0 0.0 0.0
-Ni 1.450000
-d 1.000000
-illum 2
-map_Kd diffuse.jpg
-map_Bump normal.png
-map_Ks specular.jpg
-

resources/backpack/source_attribution.txt

@@ -1,3 +0,0 @@
-Model by Berk Gedik, from: https://sketchfab.com/3d-models/survival-guitar-backpack-low-poly-799f8c4511f84fab8c3f12887f7e6b36
-
-Modified material assignment (Joey de Vries) for easier load in OpenGL model loading chapter, and renamed albedo to diffuse and metallic to specular to match non-PBR lighting setup.

resources/c4/C4Fixed.mtl

@@ -0,0 +1,12 @@
+# Blender 3.6.0 MTL File: 'None'
+# www.blender.org
+
+newmtl 01_-_Default.001
+Ns 10.000005
+Ka 1.000000 1.000000 1.000000
+Ks 0.000000 0.000000 0.000000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 1
+map_Kd Corvette_C4_Base_Color.png

resources/standard.frag

@@ -29,6 +29,7 @@ void main() {
     vec3 norm = normalize(Normal);
     vec3 lightDir = normalize(-lightDirection);
     vec3 viewDir = normalize(viewPosition - Position);
+    vec3 halfwayDir = normalize(lightDir + viewDir);
 
     vec3 ambient = lightAmbient * (diffuseColor * phongAmbient);
 
@@ -37,9 +38,11 @@ void main() {
 
     vec3 reflectDir = reflect(-lightDir, norm);
     float effectiveShininess = max(phongShininess, 1.0);
-    float spec = pow(max(dot(viewDir, reflectDir), 0.0), effectiveShininess);
+    float spec = pow(max(dot(norm, halfwayDir), 0.0), effectiveShininess);
     vec3 specular = lightSpecular * (spec * specularColor * phongSpecular);
 
     vec3 result = ambient + diffuse + specular;
-    FragColor = vec4(result, 1.0);
+
+    float gamma = 2.2;
+    FragColor.rgb = pow(result.rgb, vec3(1.0/gamma));
 }