/*******************************************************************************************
*
*   raylib [models] example - Cubicmap loading and drawing
*
*   This example has been created using raylib 1.8 (www.raylib.com)
*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
*   Copyright (c) 2015 Ramon Santamaria (@raysan5)
*
********************************************************************************************/

using System.Numerics;
using static Raylib_cs.Raylib;

namespace Examples.Models;

public class CubicmapDemo
{
    public static int Main()
    {
        // Initialization
        //--------------------------------------------------------------------------------------
        const int screenWidth = 800;
        const int screenHeight = 450;

        InitWindow(screenWidth, screenHeight, "raylib [models] example - cubesmap loading and drawing");

        // Define the camera to look into our 3d world
        Camera3D camera = new();
        camera.Position = new Vector3(16.0f, 14.0f, 16.0f);
        camera.Target = new Vector3(0.0f, 0.0f, 0.0f);
        camera.Up = new Vector3(0.0f, 1.0f, 0.0f);
        camera.FovY = 45.0f;
        camera.Projection = CameraProjection.Perspective;

        Image image = LoadImage("resources/cubicmap.png");
        Texture2D cubicmap = LoadTextureFromImage(image);

        Mesh mesh = GenMeshCubicmap(image, new Vector3(1.0f, 1.0f, 1.0f));
        Model model = LoadModelFromMesh(mesh);

        // NOTE: By default each cube is mapped to one part of texture atlas
        Texture2D texture = LoadTexture("resources/cubicmap_atlas.png");

        // Set map diffuse texture
        Raylib.SetMaterialTexture(ref model, 0, MaterialMapIndex.Albedo, ref texture);

        Vector3 mapPosition = new(-16.0f, 0.0f, -8.0f);
        UnloadImage(image);

        SetTargetFPS(60);
        //--------------------------------------------------------------------------------------

        // Main game loop
        while (!WindowShouldClose())
        {
            // Update
            //----------------------------------------------------------------------------------
            UpdateCamera(ref camera, CameraMode.Orbital);
            //----------------------------------------------------------------------------------

            // Draw
            //----------------------------------------------------------------------------------
            BeginDrawing();
            ClearBackground(Color.RayWhite);

            BeginMode3D(camera);

            DrawModel(model, mapPosition, 1.0f, Color.White);

            EndMode3D();

            Vector2 position = new(screenWidth - cubicmap.Width * 4 - 20, 20);
            DrawTextureEx(cubicmap, position, 0.0f, 4.0f, Color.White);
            DrawRectangleLines(
                screenWidth - cubicmap.Width * 4 - 20,
                20,
                cubicmap.Width * 4,
                cubicmap.Height * 4,
                Color.Green
            );

            DrawText("cubicmap image used to", 658, 90, 10, Color.Gray);
            DrawText("generate map 3d model", 658, 104, 10, Color.Gray);

            DrawFPS(10, 10);

            EndDrawing();
            //----------------------------------------------------------------------------------
        }

        // De-Initialization
        //--------------------------------------------------------------------------------------
        UnloadTexture(cubicmap);
        UnloadTexture(texture);
        UnloadModel(model);

        CloseWindow();
        //--------------------------------------------------------------------------------------

        return 0;
    }
}