#version 460
uniform vec3 position[2];
uniform vec2 width;


out float depth;



void main(){
    vec2 direction = normalize(position[1].xy - position[0].xy);

    vec2 leftdir = vec2(direction.y,-direction.x);
    vec2 rightdir = vec2(-direction.y,direction.x);



    switch(gl_VertexID){
        case 0:
            gl_Position = vec4(position[0].xy + leftdir * width, 0.0f, 1.0f);
            depth = position[0].z;
            break;
        case 1:
        case 3:
            gl_Position = vec4(position[0].xy + rightdir * width, 0.0f, 1.0f);
            depth = position[0].z;
            break;
        case 2:
        case 5:
            gl_Position = vec4(position[1].xy + leftdir * width, 0.0f, 1.0f);
            depth = position[1].z;
            break;
        case 4:
            gl_Position = vec4(position[1].xy + rightdir * width, 0.0f, 1.0f);
            depth = position[1].z;
            break;
    }
}