// https://godotshaders.com/shader/wireframe/
shader_type spatial;
render_mode unshaded, wireframe, cull_disabled;

uniform vec3 albedo : source_color = vec3(1.0, 1.0, 1.0);
uniform float outline_width : hint_range(0.0, 10.0, 0.1) = 0.0;

void vertex() {
  vec4 clip_position =
      PROJECTION_MATRIX * (MODELVIEW_MATRIX * vec4(VERTEX, 1.0));
  vec3 clip_normal =
      mat3(PROJECTION_MATRIX) * (mat3(MODELVIEW_MATRIX) * NORMAL);

  vec2 offset = normalize(clip_normal.xy) / VIEWPORT_SIZE * clip_position.w *
                outline_width * 2.0;

  clip_position.xy += offset;

  POSITION = clip_position;
}

void fragment() { ALBEDO = albedo.rgb; }