fragment.fs

#version 450 core

in vec3 Normal;
in vec3 FragPos;
in vec3 lightPos;
in vec4 GouraudColor;

out vec4 FragColor;

uniform vec3 lightColor;
uniform vec3 objectColor;
uniform vec3 viewPos;

struct Material
{
    vec3 ambient;
    vec3 diffuse;
    vec3 specular;
    float shininess;
};
uniform Material material;

struct Light
{
    vec3 position;
    vec3 ambient;
    vec3 diffuse;
    vec3 specular;
};
uniform Light light;


void main()
{
    float ambientStrength = 0.1f;
    //vec3 ambient = ambientStrength * lightColor;
    vec3 ambient = material.ambient * light.ambient;

    vec3 lightDir = normalize(lightPos - FragPos);
    vec3 normal = normalize(Normal);
    float diff = max(dot(lightDir,normal),0.0f);
    //vec3 diffuse = diff * lightColor;
    vec3 diffuse = diff * material.diffuse * light.diffuse;

    float specularStrength = 0.5f;
    vec3 viewDir = normalize(viewPos - FragPos);
    vec3 reflectDir = reflect(-lightDir,normal);
    float spec = pow(max(dot(viewDir,reflectDir),0.0f),material.shininess);
    //vec3 specular = specularStrength * spec * lightColor;
    vec3 specular = spec * material.specular * light.specular;

    //vec3 result = (ambient + diffuse + specular) * objectColor; 
    vec3 result = ambient + diffuse + specular; 
    FragColor = vec4(result,1.0f);
    //Gouraud
    //FragColor = GouraudColor;
}