mirror of https://github.com/mode777/rayjs.git
114 lines
4.2 KiB
JavaScript
114 lines
4.2 KiB
JavaScript
import * as rlc from "raylib.core"
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// 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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rlc.initWindow(screenWidth, screenHeight, "raylib [core] example - 2d camera");
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const player = new rlc.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 = rlc.getRandomValue(100, 800)
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buildings[i] = new rlc.Rectangle(
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-6000.0 + spacing,
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screenHeight - 130.0 - height,
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rlc.getRandomValue(50, 200),
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height)
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spacing += buildings[i].width;
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buildColors[i] = new rlc.Color(rlc.getRandomValue(200, 240), rlc.getRandomValue(200, 240), rlc.getRandomValue(200, 250), 255);
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}
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const camera = new rlc.Camera2D(new rlc.Vector2(screenWidth/2.0, screenHeight/2.0),new rlc.Vector2(player.x + 20.0, player.y + 20.0), 0, 1)
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rlc.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 (!rlc.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 (rlc.isKeyDown(rlc.KEY_RIGHT)) player.x += 2;
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else if (rlc.isKeyDown(rlc.KEY_LEFT)) player.x -= 2;
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// Camera target follows player
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const cameraTarget = new rlc.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 (rlc.isKeyDown(rlc.KEY_A)) camera.rotation--;
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else if (rlc.isKeyDown(rlc.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 += (rlc.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 (rlc.isKeyPressed(rlc.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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rlc.beginDrawing();
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rlc.clearBackground(rlc.RAYWHITE);
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rlc.beginMode2D(camera);
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rlc.drawRectangle(-6000, 320, 13000, 8000, rlc.DARKGRAY);
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for (let i = 0; i < MAX_BUILDINGS; i++) rlc.drawRectangleRec(buildings[i], buildColors[i]);
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rlc.drawRectangleRec(player, rlc.RED);
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rlc.drawLine(cameraTarget.x, -screenHeight*10, cameraTarget.x, screenHeight*10, rlc.GREEN);
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rlc.drawLine(-screenWidth*10, cameraTarget.y, screenWidth*10, cameraTarget.y, rlc.GREEN);
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rlc.endMode2D();
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rlc.drawText("SCREEN AREA", 640, 10, 20, rlc.RED);
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rlc.drawRectangle(0, 0, screenWidth, 5, rlc.RED);
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rlc.drawRectangle(0, 5, 5, screenHeight - 10, rlc.RED);
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rlc.drawRectangle(screenWidth - 5, 5, 5, screenHeight - 10, rlc.RED);
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rlc.drawRectangle(0, screenHeight - 5, screenWidth, 5, rlc.RED);
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rlc.drawRectangle( 10, 10, 250, 113, rlc.fade(rlc.SKYBLUE, 0.5));
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rlc.drawRectangleLines( 10, 10, 250, 113, rlc.BLUE);
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rlc.drawText("Free 2d camera controls:", 20, 20, 10, rlc.BLACK);
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rlc.drawText("- Right/Left to move Offset", 40, 40, 10, rlc.DARKGRAY);
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rlc.drawText("- Mouse Wheel to Zoom in-out", 40, 60, 10, rlc.DARKGRAY);
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rlc.drawText("- A / S to Rotate", 40, 80, 10, rlc.DARKGRAY);
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rlc.drawText("- R to reset Zoom and Rotation", 40, 100, 10, rlc.DARKGRAY);
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rlc.endDrawing();
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//----------------------------------------------------------------------------------
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}
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// De-Initialization
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//--------------------------------------------------------------------------------------
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rlc.closeWindow(); // Close window and OpenGL context
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//--------------------------------------------------------------------------------------
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