#version 330 core

// --- INPUTS ---
layout(location = 0) in vec3 aPosition;
layout(location = 1) in vec3 aNormal;
layout(location = 2) in vec2 aTexCoord;

// --- OUTPUTS ---
out vec3 FragPos;
out vec3 Normal;
out vec2 TexCoord;

// --- UNIFORMS ---
uniform mat4 model;
uniform mat4 view;
uniform mat4 projection;

void main(void)
{
    // 1. Calculate World Position
    FragPos = vec3(model * vec4(aPosition, 1.0));

    // 2. Calculate Normal
    Normal = mat3(transpose(inverse(model))) * aNormal;

    // 3. Pass Texture Coordinates
    TexCoord = aTexCoord;

    // 4. Calculate Final Position
    gl_Position = projection * view * vec4(FragPos, 1.0);
}