/*******************************************************************************************
*
*   raylib [core] example - Initialize 3d mode
*
*   This example has been created using raylib 1.0 (www.raylib.com)
*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
*   Copyright (c) 2014 Ramon Santamaria (@raysan5)
*
********************************************************************************************/

#include "raylib.h"

const Vector3 cameraOffset = { 0.0f, 10.0f, 10.0f };

Vector3 getCameraPosition( const Vector3& basePos )
{
    return (Vector3){ basePos.x + cameraOffset.x, basePos.y + cameraOffset.y, basePos.z + cameraOffset.z };
}

int main()
{
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 800;
    const int screenHeight = 450;
    const float cubeSpeed = 0.4f;

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

    // Define the camera to look into our 3d world
    Camera3D camera;
    camera.position = (Vector3){ 0.0f, 10.0f, 10.0f };  // Camera position
    camera.target = (Vector3){ 0.0f, 0.0f, 0.0f };      // Camera looking at point
    camera.up = (Vector3){ 0.0f, 1.0f, 0.0f };          // Camera up vector (rotation towards target)
    camera.fovy = 45.0f;                                // Camera field-of-view Y
    camera.type = CAMERA_PERSPECTIVE;                   // Camera mode type

    Vector3 cubePosition = { 0.0f, 1.0f, 0.0f };

    Model model = LoadModel("gfx/obj/dungeon.obj");
    Texture2D texture = LoadTexture("gfx/txt/dungeon_1_diff.png"); // Load model texture
    model.material.maps[MAP_DIFFUSE].texture = texture;                     // Set map diffuse texture

    SetTargetFPS(60);   // Set our game to run at 60 frames-per-second
    //--------------------------------------------------------------------------------------

    // Main game loop
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
        // Update
        //----------------------------------------------------------------------------------
        // TODO: Update your variables here
        //----------------------------------------------------------------------------------

        if (IsKeyDown(KEY_RIGHT)) cubePosition.x += cubeSpeed;
        if (IsKeyDown(KEY_UP)) cubePosition.z    -= cubeSpeed;
        if (IsKeyDown(KEY_LEFT)) cubePosition.x  -= cubeSpeed;
        if (IsKeyDown(KEY_DOWN)) cubePosition.z  += cubeSpeed;


        camera.target = cubePosition;
        //camera.position = getCameraPosition( cubePosition );
        // Draw
        //----------------------------------------------------------------------------------
        BeginDrawing();

            ClearBackground(RAYWHITE);

            BeginMode3D(camera);

                DrawModel(model, cubePosition, 1.f, WHITE);
                //DrawCube(cubePosition, 2.0f, 2.0f, 2.0f, RED);
                DrawCubeWires(cubePosition, 2.0f, 2.0f, 2.0f, MAROON);

                DrawGrid(20, 1.0f);

            EndMode3D();

            DrawText("Welcome to the third dimension!", 10, 40, 20, DARKGRAY);

            DrawFPS(10, 10);

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

    // De-Initialization
    //--------------------------------------------------------------------------------------
    UnloadTexture(texture);     // Unload texture
    UnloadModel(model);         // Unload model
    CloseWindow();        // Close window and OpenGL context
    //--------------------------------------------------------------------------------------

    return 0;
}