#version 450

layout(location=0) in vec3 a_position;
layout(location=1) in vec3 a_normal;

layout(location=1) out vec3 v_position;
layout(location=2) out vec3 v_normal;
layout(location=3) out vec3 v_light_position;
layout(location=4) out vec3 v_view_position;

layout(set=1, binding=0) uniform Uniforms {
    vec3 u_view_position;
    mat4 u_view_proj; // TODO: pass in view and projection matrix seperately
};


layout(set=2, binding=0) uniform Light {
    vec3 light_position;
    vec3 light_color;
};

void main() {
    v_normal = a_normal;
    vec4 pos = u_view_proj * vec4(a_position + u_view_position, 1.0);
    v_position = pos.xyz;
    v_light_position = (u_view_proj * vec4(light_position, 1.0)).xyz;
    v_view_position = (u_view_proj * vec4(u_view_position, 1.0)).xyz;
    gl_Position = u_view_proj * vec4(a_position, 1.0);
}