#version 330 core

in vec3 position;
in vec3 normal;
in vec2 tex_coords;

uniform mat4 model;
uniform mat4 view;
uniform mat4 projection;
uniform vec2 uv_offset;
uniform vec2 uv_scale;

out vec3 v_world_normal;
out vec2 v_tex;
out vec3 v_world_pos;

void main() {
    mat3 model3 = mat3(model);
    v_world_normal = normalize(transpose(inverse(model3)) * normal);
    v_tex          = tex_coords * uv_scale + uv_offset;
    v_world_pos    = (model * vec4(position, 1.0)).xyz;
    gl_Position    = projection * view * vec4(v_world_pos, 1.0);
}