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--
--  raylib [core] example - 3d camera first person
--
--  This example has been created using raylib 1.6 (www.raylib.com)
--  raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
--
--  Copyright (c) 2014-2016 Ramon Santamaria (@raysan5)
--
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MAX_COLUMNS = 20

-- Initialization
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local screenWidth = 800
local screenHeight = 450

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

-- Define the camera to look into our 3d world (position, target, up vector)
local camera = Camera(Vector3(0.0, 10.0, 10.0), Vector3(0.0, 0.0, 0.0), Vector3(0.0, 1.0, 0.0), 60.0)

-- Generates some random columns
local heights = {}
local positions = {}
local colors = {}

for i = 1, MAX_COLUMNS do
    heights[i] = GetRandomValue(1, 12)
    positions[i] = Vector3(GetRandomValue(-15, 15), heights[i]/2, GetRandomValue(-15, 15))
    colors[i] = Color(GetRandomValue(20, 255), GetRandomValue(10, 55), 30, 255)
end

local playerPosition = Vector3(4.0, 2.0, 4.0)       -- Define player position

SetCameraMode(CameraMode.FIRST_PERSON)         -- Set a first person camera mode
SetCameraFovy(camera.fovy)                 -- Set internal camera field-of-view Y

SetTargetFPS(60)                           -- Set our game to run at 60 frames-per-second
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-- Main game loop
while not WindowShouldClose() do           -- Detect window close button or ESC key
    -- Update
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    camera, playerPosition = UpdateCameraPlayer(camera, playerPosition) -- Update camera and player position
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    -- Draw
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    BeginDrawing()

        ClearBackground(RAYWHITE)

        Begin3dMode(camera)

            DrawPlane(Vector3(0.0, 0.0, 0.0), Vector2(32.0, 32.0), LIGHTGRAY) -- Draw ground
            DrawCube(Vector3(-16.0, 2.5, 0.0), 1.0, 5.0, 32.0, BLUE)     -- Draw a blue wall
            DrawCube(Vector3(16.0, 2.5, 0.0), 1.0, 5.0, 32.0, LIME)      -- Draw a green wall
            DrawCube(Vector3(0.0, 2.5, 16.0), 32.0, 5.0, 1.0, GOLD)      -- Draw a yellow wall
        
            -- Draw some cubes around
            for i = 1, MAX_COLUMNS do
                DrawCube(positions[i], 2.0, heights[i], 2.0, colors[i])
                DrawCubeWires(positions[i], 2.0, heights[i], 2.0, MAROON)
            end

        End3dMode()
        
        DrawRectangle( 10, 10, 220, 70, Fade(SKYBLUE, 0.5))
        DrawRectangleLines( 10, 10, 220, 70, BLUE)

        DrawText("First person camera default controls:", 20, 20, 10, BLACK)
        DrawText("- Move with keys: W, A, S, D", 40, 40, 10, DARKGRAY)
        DrawText("- Mouse move to look around", 40, 60, 10, DARKGRAY)

    EndDrawing()
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end

-- De-Initialization
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CloseWindow()           -- Close window and OpenGL context
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