fsh

#version 330 core


struct Material {
    vec3 ambient;
    sampler2D diffuse;
    sampler2D specular;
    float shininess;
};

struct Light{
    vec3 ambient;
    vec3 diffuse;
    vec3 specular;
    vec3 pos;
};

in vec3 f_pos;
in vec3 f_normal;
in vec2 f_texCoord;

uniform Material material;
uniform Light light;
uniform vec3 eyePos;

out vec4 color;

void main(){
    vec3 diffusePx = texture(material.diffuse, f_texCoord).rgb;

    vec3 ambient = light.ambient * diffusePx *0.5;


    vec3 normal = normalize(f_normal);
    vec3 ray = normalize(light.pos - f_pos);
    float intensity = max(dot(normal, ray), 0.0);

    vec3 diffuse = light.diffuse * (intensity * diffusePx);

    vec3 viewDir = normalize(eyePos - f_pos);
    vec3 reflectDir = reflect(-ray, normal);
    vec3 specularPx = texture(material.specular, f_texCoord).rgb;
    float spec = pow(max(dot(viewDir, reflectDir), 0.0),128 * material.shininess);
    vec3 specular = light.specular * (spec * specularPx);

    color.rgb = ambient + diffuse + specular;
    color.a = 1.0;
}