/*******************************************************************************************
*
*   raylib [models] example - Waving cubes
*
*   This example has been created using raylib 2.5 (www.raylib.com)
*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
*   Example contributed by Codecat (@codecat) and reviewed by Ramon Santamaria (@raysan5)
*
*   Copyright (c) 2019 Codecat (@codecat) and Ramon Santamaria (@raysan5)
*
********************************************************************************************/

using System;
using System.Numerics;
using static Raylib_cs.Raylib;

namespace Examples.Models;

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

        InitWindow(screenWidth, screenHeight, "raylib [models] example - waving cubes");

        // Initialize the camera
        Camera3D camera = new();
        camera.Position = new Vector3(30.0f, 20.0f, 30.0f);
        camera.Target = new Vector3(0.0f, 0.0f, 0.0f);
        camera.Up = new Vector3(0.0f, 1.0f, 0.0f);
        camera.FovY = 70.0f;
        camera.Projection = CameraProjection.Perspective;

        // Specify the amount of blocks in each direction
        const int numBlocks = 15;

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

        // Main game loop
        while (!WindowShouldClose())
        {
            // Update
            //----------------------------------------------------------------------------------
            double time = GetTime();

            // Calculate time scale for cube position and size
            float scale = (2.0f + (float)Math.Sin(time)) * 0.7f;

            // Move camera around the scene
            double cameraTime = time * 0.3;
            camera.Position.X = (float)Math.Cos(cameraTime) * 40.0f;
            camera.Position.Z = (float)Math.Sin(cameraTime) * 40.0f;
            //----------------------------------------------------------------------------------

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

            BeginMode3D(camera);

            DrawGrid(10, 5.0f);

            for (int x = 0; x < numBlocks; x++)
            {
                for (int y = 0; y < numBlocks; y++)
                {
                    for (int z = 0; z < numBlocks; z++)
                    {
                        // Scale of the blocks depends on x/y/z positions
                        float blockScale = (x + y + z) / 30.0f;

                        // Scatter makes the waving effect by adding blockScale over time
                        float scatter = (float)Math.Sin(blockScale * 20.0f + (float)(time * 4.0f));

                        // Calculate the cube position
                        Vector3 cubePos = new(
                            (float)(x - numBlocks / 2) * (scale * 3.0f) + scatter,
                            (float)(y - numBlocks / 2) * (scale * 2.0f) + scatter,
                            (float)(z - numBlocks / 2) * (scale * 3.0f) + scatter
                        );

                        // Pick a color with a hue depending on cube position for the rainbow color effect
                        Color cubeColor = ColorFromHSV((float)(((x + y + z) * 18) % 360), 0.75f, 0.9f);

                        // Calculate cube size
                        float cubeSize = (2.4f - scale) * blockScale;

                        // And finally, draw the cube!
                        DrawCube(cubePos, cubeSize, cubeSize, cubeSize, cubeColor);
                    }
                }
            }

            EndMode3D();

            DrawFPS(10, 10);

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

        // De-Initialization
        //--------------------------------------------------------------------------------------
        CloseWindow();
        //--------------------------------------------------------------------------------------

        return 0;
    }
}