GodotComponentTest/scenes/tests/HexTile3DMaterialAssign.cs

using System.Diagnostics;
using Godot;

public class HexTile3DMaterialAssign : Spatial {
    // Declare member variables here. Examples:
    // private int a = 2;
    // private string b = "text";

    private Button _blackWhitePatternButton;
    private Button _colorPatternButton;
    private SpinBox _textureSizeSpinBox;
    private HexTile3D _hexTile;
    private ShaderMaterial _customTileMaterial;
    private ImageTexture _blackWhitePatternTexture;
    private ImageTexture _colorPatternTexture;

    // Called when the node enters the scene tree for the first time.
    public override void _Ready() {
        _blackWhitePatternButton = (Button)FindNode("BlackWhitePatternButton");
        Debug.Assert(_blackWhitePatternButton != null);
        _blackWhitePatternButton.Connect("pressed", this, nameof(OnBlackWhitePatternButton));

        _colorPatternButton = (Button)FindNode("ColorPatternButton");
        Debug.Assert(_colorPatternButton != null);
        _colorPatternButton.Connect("pressed", this, nameof(OnColorPatternButton));

        _textureSizeSpinBox = (SpinBox)FindNode("TextureSizeSpinBox");
        Debug.Assert(_textureSizeSpinBox != null);
        _textureSizeSpinBox.Connect("value_changed", this, nameof(OnTextureSizeChanged));

        _hexTile = (HexTile3D)FindNode("HexTile3D");
        Debug.Assert(_hexTile != null);

        _customTileMaterial = GD.Load<ShaderMaterial>("materials/HexTileTextureLookup.tres");

        _blackWhitePatternTexture = new ImageTexture();
        Image image = new();
        image.Load("assets/4x4checker.png");
        _blackWhitePatternTexture.CreateFromImage(image, (uint)(Texture.FlagsEnum.Mipmaps | Texture.FlagsEnum.Repeat));

        _colorPatternTexture = new ImageTexture();
        image.Load("assets/4x4checkerColor.png");
        _colorPatternTexture.CreateFromImage(image, (uint)(Texture.FlagsEnum.Mipmaps | Texture.FlagsEnum.Repeat));
    }

    public void OnBlackWhitePatternButton() {
        GD.Print("Apply Black White Pattern!");
        _customTileMaterial.SetShaderParam("MapAlbedoTexture", _blackWhitePatternTexture);
    }

    public void OnColorPatternButton() {
        GD.Print("Apply Collor Pattern!");
        //currentMaterial.SetShaderParam("MapAlbedoTexture", _colorPatternTexture);
        _customTileMaterial.SetShaderParam("MapAlbedoTexture", _colorPatternTexture);

//        _customTileMaterial.SetShaderParam("MapAlbedoTexture", _imageTexture);

//        _hexTile.Mesh.SetSurfaceMaterial(0, _customTileMaterial);
    }

    public void OnTextureSizeChanged(float value) {
        _customTileMaterial.SetShaderParam("TextureSize", (int)value);
        GD.Print("Texture size: " + _customTileMaterial.GetShaderParam("TextureSize"));
    }
}