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-------------------------------------------------------------------------------------------
--
-- raylib [core] example - 2d camera
--
-- 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)
--
-------------------------------------------------------------------------------------------
MAX_BUILDINGS = 100
-- Initialization
-------------------------------------------------------------------------------------------
local screenWidth = 800
local screenHeight = 450
InitWindow(screenWidth, screenHeight, "raylib [core] example - 2d camera")
local player = Rectangle(400, 280, 40, 40)
local buildings = {}
local buildColors = {}
local spacing = 0;
for i = 1, MAX_BUILDINGS do
buildings[i] = Rectangle(0, 0, 0, 0)
buildings[i].width = GetRandomValue(50, 200)
buildings[i].height = GetRandomValue(100, 800)
buildings[i].y = screenHeight - 130 - buildings[i].height
buildings[i].x = -6000 + spacing
spacing = spacing + buildings[i].width
buildColors[i] = Color(GetRandomValue(200, 240), GetRandomValue(200, 240), GetRandomValue(200, 250), 255)
end
local camera = Camera2D(Vector2(0, 0), Vector2(0, 0), 0.0, 1.0)
camera.target = Vector2(player.x + 20, player.y + 20)
camera.offset = Vector2(0, 0)
camera.rotation = 0.0
camera.zoom = 1.0
SetTargetFPS(60)
-------------------------------------------------------------------------------------------
-- Main game loop
while not WindowShouldClose() do -- Detect window close button or ESC key
-- Update
---------------------------------------------------------------------------------------
if (IsKeyDown(KEY.RIGHT)) then
player.x = player.x + 2 -- Player movement
camera.offset.x = camera.offset.x - 2 -- Camera displacement with player movement
elseif (IsKeyDown(KEY.LEFT)) then
player.x = player.x - 2 -- Player movement
camera.offset.x = camera.offset.x + 2 -- Camera displacement with player movement
end
-- Camera target follows player
camera.target = Vector2(player.x + 20, player.y + 20)
-- Camera rotation controls
if (IsKeyDown(KEY.A)) then camera.rotation = camera.rotation - 1
elseif (IsKeyDown(KEY.S)) then camera.rotation = camera.rotation + 1
end
-- Limit camera rotation to 80 degrees (-40 to 40)
if (camera.rotation > 40) then camera.rotation = 40
elseif (camera.rotation < -40) then camera.rotation = -40
end
-- Camera zoom controls
camera.zoom = camera.zoom + (GetMouseWheelMove()*0.05)
if (camera.zoom > 3.0) then camera.zoom = 3.0
elseif (camera.zoom < 0.1) then camera.zoom = 0.1
end
-- Camera reset (zoom and rotation)
if (IsKeyPressed(KEY.R)) then
camera.zoom = 1.0
camera.rotation = 0.0
end
---------------------------------------------------------------------------------------
-- Draw
---------------------------------------------------------------------------------------
BeginDrawing()
ClearBackground(RAYWHITE)
Begin2dMode(camera)
DrawRectangle(-6000, 320, 13000, 8000, DARKGRAY)
for i = 1, MAX_BUILDINGS, 1 do DrawRectangleRec(buildings[i], buildColors[i]) end
DrawRectangleRec(player, RED)
DrawRectangle(camera.target.x, -500, 1, screenHeight*4, GREEN)
DrawRectangle(-500, camera.target.y, screenWidth*4, 1, GREEN)
End2dMode()
DrawText("SCREEN AREA", 640, 10, 20, RED)
DrawRectangle(0, 0, screenWidth, 5, RED)
DrawRectangle(0, 5, 5, screenHeight - 10, RED)
DrawRectangle(screenWidth - 5, 5, 5, screenHeight - 10, RED)
DrawRectangle(0, screenHeight - 5, screenWidth, 5, RED)
DrawRectangle( 10, 10, 250, 113, Fade(SKYBLUE, 0.5))
DrawRectangleLines( 10, 10, 250, 113, BLUE)
DrawText("Free 2d camera controls:", 20, 20, 10, BLACK)
DrawText("- Right/Left to move Offset", 40, 40, 10, DARKGRAY)
DrawText("- Mouse Wheel to Zoom in-out", 40, 60, 10, DARKGRAY)
DrawText("- A / S to Rotate", 40, 80, 10, DARKGRAY)
DrawText("- R to reset Zoom and Rotation", 40, 100, 10, DARKGRAY)
EndDrawing();
---------------------------------------------------------------------------------------
end
-- De-Initialization
-------------------------------------------------------------------------------------------
CloseWindow() -- Close window and OpenGL context
-------------------------------------------------------------------------------------------
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