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130 lines
4.7 KiB
130 lines
4.7 KiB
-------------------------------------------------------------------------------------------
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--
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-- raylib [core] example - 2d camera
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--
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-- This example has been created using raylib 1.6 (www.raylib.com)
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-- raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
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--
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-- Copyright (c) 2014-2016 Ramon Santamaria (@raysan5)
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--
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-------------------------------------------------------------------------------------------
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MAX_BUILDINGS = 100
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-- Initialization
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-------------------------------------------------------------------------------------------
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local screenWidth = 800
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local screenHeight = 450
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InitWindow(screenWidth, screenHeight, "raylib [core] example - 2d camera")
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local player = Rectangle(400, 280, 40, 40)
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local buildings = {}
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local buildColors = {}
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local spacing = 0;
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for i = 1, MAX_BUILDINGS do
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buildings[i] = Rectangle(0, 0, 0, 0)
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buildings[i].width = GetRandomValue(50, 200)
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buildings[i].height = GetRandomValue(100, 800)
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buildings[i].y = screenHeight - 130 - buildings[i].height
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buildings[i].x = -6000 + spacing
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spacing = spacing + buildings[i].width
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buildColors[i] = Color(GetRandomValue(200, 240), GetRandomValue(200, 240), GetRandomValue(200, 250), 255)
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end
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local camera = Camera2D(Vector2(0, 0), Vector2(0, 0), 0.0, 1.0)
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camera.target = Vector2(player.x + 20, player.y + 20)
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camera.offset = Vector2(0, 0)
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camera.rotation = 0.0
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camera.zoom = 1.0
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SetTargetFPS(60)
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-------------------------------------------------------------------------------------------
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-- Main game loop
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while not WindowShouldClose() do -- Detect window close button or ESC key
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-- Update
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---------------------------------------------------------------------------------------
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if (IsKeyDown(KEY.RIGHT)) then
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player.x = player.x + 2 -- Player movement
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camera.offset.x = camera.offset.x - 2 -- Camera displacement with player movement
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elseif (IsKeyDown(KEY.LEFT)) then
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player.x = player.x - 2 -- Player movement
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camera.offset.x = camera.offset.x + 2 -- Camera displacement with player movement
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end
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-- Camera target follows player
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camera.target = Vector2(player.x + 20, player.y + 20)
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-- Camera rotation controls
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if (IsKeyDown(KEY.A)) then camera.rotation = camera.rotation - 1
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elseif (IsKeyDown(KEY.S)) then camera.rotation = camera.rotation + 1
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end
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-- Limit camera rotation to 80 degrees (-40 to 40)
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if (camera.rotation > 40) then camera.rotation = 40
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elseif (camera.rotation < -40) then camera.rotation = -40
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end
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-- Camera zoom controls
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camera.zoom = camera.zoom + (GetMouseWheelMove()*0.05)
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if (camera.zoom > 3.0) then camera.zoom = 3.0
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elseif (camera.zoom < 0.1) then camera.zoom = 0.1
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end
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-- Camera reset (zoom and rotation)
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if (IsKeyPressed(KEY.R)) then
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camera.zoom = 1.0
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camera.rotation = 0.0
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end
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---------------------------------------------------------------------------------------
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-- Draw
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---------------------------------------------------------------------------------------
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BeginDrawing()
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ClearBackground(RAYWHITE)
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Begin2dMode(camera)
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DrawRectangle(-6000, 320, 13000, 8000, DARKGRAY)
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for i = 1, MAX_BUILDINGS, 1 do DrawRectangleRec(buildings[i], buildColors[i]) end
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DrawRectangleRec(player, RED)
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DrawRectangle(camera.target.x, -500, 1, screenHeight*4, GREEN)
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DrawRectangle(-500, camera.target.y, screenWidth*4, 1, GREEN)
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End2dMode()
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DrawText("SCREEN AREA", 640, 10, 20, RED)
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DrawRectangle(0, 0, screenWidth, 5, RED)
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DrawRectangle(0, 5, 5, screenHeight - 10, RED)
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DrawRectangle(screenWidth - 5, 5, 5, screenHeight - 10, RED)
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DrawRectangle(0, screenHeight - 5, screenWidth, 5, RED)
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DrawRectangle( 10, 10, 250, 113, Fade(SKYBLUE, 0.5))
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DrawRectangleLines( 10, 10, 250, 113, BLUE)
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DrawText("Free 2d camera controls:", 20, 20, 10, BLACK)
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DrawText("- Right/Left to move Offset", 40, 40, 10, DARKGRAY)
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DrawText("- Mouse Wheel to Zoom in-out", 40, 60, 10, DARKGRAY)
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DrawText("- A / S to Rotate", 40, 80, 10, DARKGRAY)
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DrawText("- R to reset Zoom and Rotation", 40, 100, 10, DARKGRAY)
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EndDrawing();
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---------------------------------------------------------------------------------------
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end
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-- De-Initialization
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-------------------------------------------------------------------------------------------
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CloseWindow() -- Close window and OpenGL context
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-------------------------------------------------------------------------------------------
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