add: added point light shader and light object shader

resources/shaders/light_object.glsl

@@ -0,0 +1,9 @@
+#version 330 core
+out vec4 FragColor;
+
+uniform vec3 lightColor;
+
+void main()
+{
+    FragColor = vec4(lightColor, 1.0f);
+}

resources/shaders/point_light.glsl

@@ -11,6 +11,7 @@ struct Light {
     vec3 ambient;
     vec3 diffuse;
     vec3 specular;
+    vec3 color;
 	
     float constant;
     float linear;
@@ -22,14 +23,17 @@ uniform vec3 viewPos;
 uniform Light light;
 
 void main()
-{    
+{
+	float distance    = length(light.position - FragPos);
+	float attenuation = 1.0 / (light.constant + light.linear * distance + light.quadratic * (distance * distance));
+
 	// ambient// ambient
     float ambientStrength = 0.1;
     vec3 ambient = ambientStrength * light.color;
 	
 	// diffuse 
 	vec3 norm = normalize(Normal);
-	vec3 lightDir = normalize(-light.direction);
+	vec3 lightDir = normalize(light.position - FragPos);
 	float diff = max(dot(norm, lightDir), 0.0);
 	vec3 diffuse  = diff * light.color;
 	
@@ -39,6 +43,10 @@ void main()
 	vec3 reflectDir = reflect(-lightDir, norm);  
 	float spec = pow(max(dot(viewDir, reflectDir), 0.0), 32);
 	vec3 specular = specularStrength * spec * light.color;
+
+	ambient  *= attenuation; 
+	diffuse  *= attenuation;
+	specular *= attenuation;
 		
 	vec3 result = ambient + diffuse + specular;
 	vec4 light = vec4(result, 1.0);