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/*******************************************************************************************
*
*   raylib [models] example - Load and draw a 3d model (OBJ) (adapted for HTML5 platform)
*
*   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) 2014 Ramon Santamaria (@raysan5)
*
********************************************************************************************/

#include "raylib.h"

#if defined(PLATFORM_WEB)
    #include <emscripten/emscripten.h>
#endif

//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;

// Define the camera to look into our 3d world
Camera camera = { 0 };

Model model = { 0 };            // Declare OBJ model
Texture2D texture = { 0 };      // Declare model texture

Vector3 position = { 0.0f, 0.0f, 0.0f };   // Define model position

//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void);     // Update and Draw one frame

//----------------------------------------------------------------------------------
// Program Main Entry Point
//----------------------------------------------------------------------------------
int main(void)
{
    // Initialization
    //--------------------------------------------------------------------------------------
    InitWindow(screenWidth, screenHeight, "raylib [models] example - obj model loading");

    camera.position = (Vector3){ 8.0f, 8.0f, 8.0f };    // Camera position
    camera.target = (Vector3){ 0.0f, 2.5f, 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

    model = LoadModel("resources/models/castle.obj");               // Load OBJ model
    texture = LoadTexture("resources/models/castle_diffuse.png");   // Load model texture
    model.materials[0].maps[MAP_DIFFUSE].texture = texture;         // Set map diffuse texture

#if defined(PLATFORM_WEB)
    emscripten_set_main_loop(UpdateDrawFrame, 0, 1);
#else
    SetTargetFPS(60);   // Set our game to run at 60 frames-per-second
    //--------------------------------------------------------------------------------------

    // Main game loop
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
        UpdateDrawFrame();
    }
#endif

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

    CloseWindow();              // Close window and OpenGL context
    //--------------------------------------------------------------------------------------

    return 0;
}

//----------------------------------------------------------------------------------
// Module Functions Definition
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void)
{
    // Update
    //----------------------------------------------------------------------------------
    //...
    //----------------------------------------------------------------------------------

    // Draw
    //----------------------------------------------------------------------------------
    BeginDrawing();

        ClearBackground(RAYWHITE);

        BeginMode3D(camera);

            DrawModel(model, position, 0.2f, WHITE);   // Draw 3d model with texture

            DrawGrid(10, 1.0f);         // Draw a grid

            DrawGizmo(position);        // Draw gizmo

        EndMode3D();

        DrawText("(c) Castle 3D model by Alberto Cano", screenWidth - 200, screenHeight - 20, 10, GRAY);

        DrawFPS(10, 10);

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