wtf

build/assets/shaders/basic.frag

@@ -5,32 +5,24 @@ in vec3 Color;
 
 out vec4 FragColor;
 
-uniform vec3 uLightPos;
+uniform vec3 uSunDir;
+uniform vec3 uSunColor;
+uniform vec3 uSkyColor;
+uniform vec3 uGroundColor;
 uniform vec3 uViewPos;
-uniform vec3 uLightColor;
-uniform float uAmbientStrength;
 uniform float uSpecularStrength;
 uniform float uShininess;
 
 void main() {
-    // Normalize the normal vector
-    vec3 norm = normalize(Normal);
-    
-    // Ambient lighting
-    vec3 ambient = uAmbientStrength * uLightColor;
-    
-    // Diffuse lighting
-    vec3 lightDir = normalize(uLightPos - FragPos);
-    float diff = max(dot(norm, lightDir), 0.0);
-    vec3 diffuse = diff * uLightColor;
-    
-    // Specular lighting
-    vec3 viewDir = normalize(uViewPos - FragPos);
-    vec3 reflectDir = reflect(-lightDir, norm);
-    float spec = pow(max(dot(viewDir, reflectDir), 0.0), uShininess);
-    vec3 specular = uSpecularStrength * spec * uLightColor;
-    
-    // Combine results
-    vec3 result = (ambient + diffuse + specular) * Color;
+    vec3 N = normalize(Normal);
+    float up = 0.5 + 0.5 * N.y;
+    vec3 ambient = mix(uGroundColor, uSkyColor, up);
+    float NdotL = max(dot(N, uSunDir), 0.0);
+    vec3 diffuse = NdotL * uSunColor;
+    vec3 V = normalize(uViewPos - FragPos);
+    vec3 H = normalize(uSunDir + V);
+    float spec = pow(max(dot(N, H), 0.0), uShininess) * (NdotL > 0.0 ? 1.0 : 0.0);
+    vec3 specular = uSpecularStrength * spec * uSunColor;
+    vec3 result = (ambient + diffuse) * Color + specular;
     FragColor = vec4(result, 1.0);
 }