貪食蛇_S 副本 | JavaScript 程式專案

{"id":188173,"student_id":3760,"content":"// 將背景設定為黑色\nsetBackdrop(\"#000000\");\n// 用 \"head.gif\" 創造一個角色\nlet head = createSprite(\"head.gif\");\nhead.x = 320;\nhead.y = 240;\n\nlet food = createSprite(\"food.gif\");\nfood.x = Math.random()*640;\nfood.y = Math.random()*480;\n\nlet bodies = [];\nlet clock = 0;\nlet score = 0;\nlet alive = true;\nlet speed = 8;\n\n\nforever(function() {\n    // 在這裡的程式碼會不斷執\n    isDie();\n    playerControl();\n    eat();\n    move();\n    print(score, 20, 20, \"white\", 20);\n    if (!alive) \n        print(\"Game Over\", 160, 240, \"red\", 60);\n});\n\nfunction move() {\n    clock += 1;\n    if (clock%speed===0 \u0026\u0026 alive) {\n        if (bodies.length\u003e0) {\n            let lastBody = bodies.pop();\n            lastBody.hidden = false;\n            lastBody.x = head.x;\n            lastBody.y = head.y;\n            bodies.unshift(lastBody);\n        }\n        head.stepForward(16);\n    }\n}\n\nfunction playerControl() {\n    if (key.up \u0026\u0026 head.direction!==180) head.direction = 0;\n    if (key.down \u0026\u0026 head.direction!==0) head.direction = 180;\n    if (key.right \u0026\u0026 head.direction!==-90) head.direction = 90;\n    if (key.left \u0026\u0026 head.direction!==90) head.direction = -90;\n\n}\n\nfunction eat() {\n    if (head.touched(food)) {\n        food.x = Math.random()*640;\n        food.y = Math.random()*480;\n        score += 1;\n        if (speed\u003e=2 \u0026\u0026 score%3===0) \n            speed -= 1;\n        \n        let body = createSprite(\"body.gif\");\n        body.hidden = true;\n        bodies.push(body);\n    }\n}\n\nfunction isDie() {\n    if (head.touched(bodies) || head.x\u003e640 || head.x\u003c0 || head.y\u003c0 || head.y\u003e480) {\n        alive = false;\n    }\n}\n","created_at":"2020-09-05T00:57:42.503+08:00","updated_at":"2021-07-28T22:39:38.885+08:00","name":"貪食蛇_S 副本","language":"javascript","screenshot":{"url":"https://cdn9.koding.school/uploads/project/screenshot/188173/9829a282d620418f3f78e626e3c078a9.jpg"},"parent_id":54317,"plugin":"","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":35,"hashid":"9ygs4dj2","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}