#version 460 core

// Note: orm = occlusion/roughness/metallic

layout (location = 0) out vec3 g_position;
layout (location = 1) out vec3 g_albedo;
layout (location = 2) out vec3 g_normal;
layout (location = 3) out vec3 g_orm;

in VS_OUT {
    vec3 viewPos;
    vec2 texcoord;
    mat3 TBN;
} fs_in;

layout (location = 1) uniform sampler2D tex_albedo;
layout (location = 2) uniform sampler2D tex_normal;
layout (location = 3) uniform sampler2D tex_orm;

void main() {
    // Just sample albedo and occlusion/roughness/metallic 
    g_albedo = texture(tex_albedo, fs_in.texcoord).rgb;
    g_orm = texture(tex_orm, fs_in.texcoord).rgb;

    g_position = fs_in.viewPos;

    // Normal mapping
    vec3 normal = texture(tex_normal, fs_in.texcoord).rgb;
    normal = normal * 2.0 - 1.0;
    g_normal = normalize(fs_in.TBN * normal);
}