raylib-cs/Examples/Core/Camera3dFree.cs

/*******************************************************************************************
*
*   raylib [core] example - Initialize 3d camera free
*
*   This example has been created using raylib 1.3 (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.Core;

public class Camera3dFree
{
    public static int Main()
    {
        // Initialization
        //--------------------------------------------------------------------------------------
        const int screenWidth = 800;
        const int screenHeight = 450;

        InitWindow(screenWidth, screenHeight, "raylib [core] example - 3d camera free");

        // Define the camera to look into our 3d world
        Camera3D camera;
        camera.Position = new Vector3(10.0f, 10.0f, 10.0f);
        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;

        Vector3 cubePosition = new(0.0f, 0.0f, 0.0f);

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

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

            if (IsKeyDown(KeyboardKey.Z))
            {
                camera.Target = new Vector3(0.0f, 0.0f, 0.0f);
            }
            //----------------------------------------------------------------------------------

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

            BeginMode3D(camera);

            DrawCube(cubePosition, 2.0f, 2.0f, 2.0f, Color.Red);
            DrawCubeWires(cubePosition, 2.0f, 2.0f, 2.0f, Color.Maroon);

            DrawGrid(10, 1.0f);

            EndMode3D();

            DrawRectangle(10, 10, 320, 133, ColorAlpha(Color.SkyBlue, 0.5f));
            DrawRectangleLines(10, 10, 320, 133, Color.Blue);

            DrawText("Free camera default controls:", 20, 20, 10, Color.Black);
            DrawText("- Mouse Wheel to Zoom in-out", 40, 40, 10, Color.DarkGray);
            DrawText("- Mouse Wheel Pressed to Pan", 40, 60, 10, Color.DarkGray);
            DrawText("- Alt + Mouse Wheel Pressed to Rotate", 40, 80, 10, Color.DarkGray);
            DrawText("- Alt + Ctrl + Mouse Wheel Pressed for Smooth Zoom", 40, 100, 10, Color.DarkGray);
            DrawText("- Z to zoom to (0, 0, 0)", 40, 120, 10, Color.DarkGray);

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

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

        return 0;
    }
}