mirror of https://github.com/mode777/rayjs.git
112 lines
3.9 KiB
JavaScript
112 lines
3.9 KiB
JavaScript
// Initialization
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//--------------------------------------------------------------------------------------
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const screenWidth = 800;
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const screenHeight = 450;
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const MAX_BUILDINGS = 100
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initWindow(screenWidth, screenHeight, "raylib [core] example - 2d camera");
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const player = new Rectangle(400, 280, 40, 40);
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const buildings = new Array(MAX_BUILDINGS);
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const buildColors = new Array(MAX_BUILDINGS);
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let spacing = 0;
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for (let i = 0; i < MAX_BUILDINGS; i++)
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{
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const height = getRandomValue(100, 800)
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buildings[i] = new Rectangle(
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-6000.0 + spacing,
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screenHeight - 130.0 - height,
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getRandomValue(50, 200),
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height)
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spacing += buildings[i].width;
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buildColors[i] = new Color(getRandomValue(200, 240), getRandomValue(200, 240), getRandomValue(200, 250), 255);
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}
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const camera = new Camera2D(new Vector2(screenWidth/2.0, screenHeight/2.0),new Vector2(player.x + 20.0, player.y + 20.0), 0, 1)
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setTargetFPS(60); // Set our game to run at 60 frames-per-second
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//--------------------------------------------------------------------------------------
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// Main game loop
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while (!windowShouldClose()) // Detect window close button or ESC key
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{
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// Update
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//----------------------------------------------------------------------------------
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// Player movement
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if (isKeyDown(KEY_RIGHT)) player.x += 2;
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else if (isKeyDown(KEY_LEFT)) player.x -= 2;
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// Camera target follows player
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const cameraTarget = new Vector2(player.x + 20, player.y + 20);
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camera.target = cameraTarget;
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// Camera rotation controls
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if (isKeyDown(KEY_A)) camera.rotation--;
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else if (isKeyDown(KEY_S)) camera.rotation++;
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// Limit camera rotation to 80 degrees (-40 to 40)
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if (camera.rotation > 40) camera.rotation = 40;
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else if (camera.rotation < -40) camera.rotation = -40;
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// Camera zoom controls
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camera.zoom += (getMouseWheelMove()*0.05);
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if (camera.zoom > 3.0) camera.zoom = 3.0;
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else if (camera.zoom < 0.1) camera.zoom = 0.1;
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// Camera reset (zoom and rotation)
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if (isKeyPressed(KEY_R))
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{
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camera.zoom = 1.0;
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camera.rotation = 0.0;
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}
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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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beginMode2D(camera);
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drawRectangle(-6000, 320, 13000, 8000, DARKGRAY);
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for (let i = 0; i < MAX_BUILDINGS; i++) drawRectangleRec(buildings[i], buildColors[i]);
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drawRectangleRec(player, RED);
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drawLine(cameraTarget.x, -screenHeight*10, cameraTarget.x, screenHeight*10, GREEN);
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drawLine(-screenWidth*10, cameraTarget.y, screenWidth*10, cameraTarget.y, GREEN);
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endMode2D();
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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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}
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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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