/*******************************************************************************************
*
*   raylib [models] example - Heightmap 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)
*
********************************************************************************************/

#include "raylib.h"

int main()
[
    # Initialization
    #--------------------------------------------------------------------------------------
    int screenWidth = 800
    int screenHeight = 450

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

    # Define our custom camera to look into our 3d world
    Camera camera = [[ 18.0, 16.0, 18.0 ], [ 0.0, 0.0, 0.0 ], [ 0.0, 1.0, 0.0 ], 45.0, 0 ]

    Image image = LoadImage("resources/heightmap.png")             # Load heightmap image (RAM)
    Texture2D texture = LoadTextureFromImage(image)                # Convert image to texture (VRAM)
    
    Mesh mesh = GenMeshHeightmap(image, (Vector3)[ 16, 8, 16 ])    # Generate heightmap mesh (RAM and VRAM)
    Model model = LoadModelFromMesh(mesh)                          # Load model from generated mesh

    model.material.maps[MAP_DIFFUSE].texture = texture             # Set map diffuse texture
    Vector3 mapPosition = [ -8.0, 0.0, -8.0 ]                   # Define model position

    UnloadImage(image)                     # Unload heightmap image from RAM, already uploaded to VRAM
    
    SetCameraMode(camera, CAMERA_ORBITAL)  # Set an orbital camera mode

    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
        #----------------------------------------------------------------------------------
        UpdateCamera(&camera)              # Update camera
        #----------------------------------------------------------------------------------

        # Draw
        #----------------------------------------------------------------------------------
        BeginDrawing()

            ClearBackground(RAYWHITE)

            BeginMode3D(camera)

                DrawModel(model, mapPosition, 1.0, RED)

                DrawGrid(20, 1.0)

            EndMode3D()
            
            DrawTexture(texture, screenWidth - texture.width - 20, 20, WHITE)
            DrawRectangleLines(screenWidth - texture.width - 20, 20, texture.width, texture.height, GREEN)

            DrawFPS(10, 10)

        EndDrawing()
        #----------------------------------------------------------------------------------
    ]

    # De-Initialization
    #--------------------------------------------------------------------------------------
    UnloadTexture(texture)     # Unload texture
    UnloadModel(model)         # Unload model

    CloseWindow()              # Close window and OpenGL context
    #--------------------------------------------------------------------------------------

    return 0
]