blin算法计算specular

res/shader/test.fs

@@ -17,22 +17,20 @@ void main()
 	vec4 ambientColor = U_AmbientLightColor * U_AmbientMaterial;
 
 	//diffuse
-	vec3 L = vec3(0.0);
-	if(U_LightPos.w==0.0){
-		//这是方向光
-		L = normalize(U_LightPos.xyz);
-	} else {
-		//这是点光源
-		//model point -> light pos
-	}
+	vec3 L = normalize(U_LightPos.xyz);
 	vec3 N = normalize(V_Normal);
 	float diffuseIntensity = max(0.0, dot(L,N));
 	vec4 diffuseColor = U_DiffuseLightColor * U_DiffuseMaterial * diffuseIntensity;
 
 	//specular
-	vec3 reflectDir = normalize(reflect(-L,N));//-L是入射光向量，通过reflect函数求到反射光方向
+	//vec3 reflectDir = normalize(reflect(-L,N));//-L是入射光向量，通过reflect函数求到反射光方向
+	//vec3 viewDir = normalize(U_EyePos - V_WorldPos);
+	//vec4 specularColor = U_SpecularLightColor * U_SpecularMaterial * pow(max(0.0, dot(viewDir,reflectDir)), 64.0);
+
+	//specular blin
 	vec3 viewDir = normalize(U_EyePos - V_WorldPos);
-	vec4 specularColor = U_SpecularLightColor * U_SpecularMaterial * pow(max(0.0, dot(viewDir,reflectDir)), 64.0);
+	vec3 M = normalize(L + viewDir);
+	vec4 specularColor = U_SpecularLightColor * U_SpecularMaterial * pow(max(0.0, dot(M,N)), 64.0);
 
 
 	gl_FragColor = ambientColor + diffuseColor + specularColor;