added files

build/assets/shaders/basic.frag

@@ -0,0 +1,24 @@
+#version 330 core
+in vec3 vNormal;
+in vec3 vWorldPos;
+
+uniform vec3 uBaseColor;
+uniform vec3 uLightDir;
+uniform vec3 uViewPos;
+
+out vec4 fragColor;
+
+void main() {
+    vec3 normal = normalize(vNormal);
+    vec3 lightDir = normalize(-uLightDir);
+
+    float diffuse = max(dot(normal, lightDir), 0.0);
+    float ambient = 0.12;
+
+    vec3 viewDir = normalize(uViewPos - vWorldPos);
+    vec3 halfway = normalize(lightDir + viewDir);
+    float specular = pow(max(dot(normal, halfway), 0.0), 32.0) * 0.3;
+
+    vec3 color = uBaseColor * (ambient + diffuse) + vec3(specular);
+    fragColor = vec4(color, 1.0);
+}