{"id":18631,"student_id":248,"content":"setBackdrop(\"black\");\nvar spaceship = createSprite('spaceship.png');\nvar speed = 0;\nvar vx = 0;\nvar vy = 0;\nvar direction = spaceship.direction;\n\nforever(function () {\n if (key.right) {\n spaceship.direction += 3;\n }\n if (key.left) {\n spaceship.direction -= 3;\n }\n if (key.up) {\n if (speed \u003c 5) {\n speed += 0.1;\n vx = speed * Math.cos(spaceship.direction);\n // vy = speed*Math.sin(spaceship.direction);\n }\n } else {\n if (speed \u003e 0) {\n speed -= 0.01;\n }\n }\n // spaceship.stepForward(speed);\n spaceship.x += vx;\n spaceship.y += vy;\n\n if (spaceship.x \u003e 640) {\n spaceship.x = 0;\n }\n\n if (spaceship.x \u003c 0) {\n spaceship.x = 640;\n }\n\n if (spaceship.y \u003c 0) {\n spaceship.y = 480;\n }\n\n if (spaceship.y \u003c 0) {\n spaceship.y = 480;\n }\n\n print(spaceship.direction, 10, 10, 'white', 20);\n print(speed, 10, 30, 'white', 20);\n});\n\n\nsetInterval(createAsteroid, 2000);\nfunction createAsteroid() {\n var asteroid = createSprite(\"asteroid.png\");\n asteroid.direction = Math.random() * 360;\n\n asteroid.forever(function () {\n if (asteroid.x \u003e 640) {\n asteroid.x = 0;\n }\n if (asteroid.x \u003c 0) {\n asteroid.x = 640;\n }\n if (asteroid.y \u003c 0) {\n asteroid.y = 480;\n }\n if (asteroid.y \u003c 0) {\n asteroid.y = 480;\n }\n asteroid.stepForward(1);\n asteroid.direction++;\n });\n}\n","created_at":"2017-03-01T20:52:04.729+08:00","updated_at":"2019-11-10T00:56:13.328+08:00","name":"Asteroids","language":"javascript","screenshot":{"url":"https://cdn0.koding.school/uploads/project/screenshot/18631/89edcce60b8890776f43b51e69f48ea4.jpg"},"parent_id":2,"plugin":"","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":234,"hashid":"882s4yej","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}
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