using Godot;
using System;

using Rokojori.Extensions;
namespace Rokojori
{
  /** What ControlMapTerrain fills a fresh control map with.

      There is no painting system yet, so the map needs a source in order for
      there to be anything to look at. These are deliberately patterns rather
      than content: each one isolates a single thing that can be wrong, so a
      live test says which part broke instead of only that something did.
  */
  public enum ControlMapDebugPattern
  {
    /** Texture 0 everywhere, neutral in every field. What a painting system
        would start from, and the control that proves nothing in the decode path
        is adding anything of its own.
    */
    Flat = 0,

    /** Texture index cycling per cell, no blending. Hard index boundaries -
        this is what shows whether the 4-tap read is sampling the texels it
        thinks it is, since a half-texel error puts the seams visibly off the
        cell grid.
    */
    Checkerboard = 1,

    /** Texture 0 under texture 1, blend ramping along X. Isolates the
        base/overlay crossfade and the height weighting; blendSharpness should
        visibly change the shape of the transition and nothing else.
    */
    BlendGradient = 2,

    /** Per-cell uv scale and rotation, one texture. Isolates the two fields
        that are nothing but uv manipulation - and therefore the derivative
        handling, because this is the pattern that goes blurry at every cell
        border if textureGrad is not doing its job.
    */
    ScaleAndRotation = 3,

    /** Holes punched in a grid, texture 0 elsewhere. Isolates the flag path,
        which is read from a single texel and so should have perfectly square
        edges even with bilinear on.
    */
    Holes = 4,

    /** All four of the above in quadrants, so one look covers everything. The
        one to start a live test with.
    */
    Showcase = 5
  }
}