Don't touch the spike | JavaScript 程式專案

{"id":9408,"student_id":7,"content":"setBackdrop(\"bg.jpg\");\n\nvar spike = createSprite(\"spike.png\");\nvar bird = createSprite(\"bird.png\");\nbird.moveTo(320, 240);\nbird.rotationStyle = \"flipped\";\nvar x = 5;\nvar y = -5;\n\nvar spikeY = [80, 145, 210, 275, 340];\nvar leftSpikes = [];\nvar rightSpikes = [];\n\nspike.when(\"touch\", bird, function(){\n    stop();\n});\n\n// createSpikes\nfor(var i = 0;i \u003c 5;i++) {\n    var rightSpike = createSprite({\n        x: 460,\n        y: spikeY[i],\n        hidden: true,\n        costumes: \"rightSpike.png\"\n    });\n    rightSpike.when(\"touch\", bird, function(){\n        stop();\n    });\n    rightSpikes.push(rightSpike);\n\n    var leftSpike = createSprite({\n        x: 200,\n        y: spikeY[i],\n        hidden: true,\n        costumes: \"leftSpike.png\"\n    });\n    leftSpike.when(\"touch\", bird, function(){\n        stop();\n    });\n    leftSpikes.push(leftSpike);\n}\n\nwhen(\"click\", function() {\n    y = -5;\n});\n\nforever(function() {\n    bird.x += x;\n    bird.y += y;\n    y += 0.5;\n    if(bird.x \u003e 455 || bird.x \u003c 185) {\n        x *= -1;\n        bird.direction += 180;\n        toggleSpike();\n    }\n});\n\nfunction toggleSpike() {\n    spikeNum = Math.ceil(Math.random()*4) + 1;\n    if (bird.direction%360 == 270) {\n        for(var i = 0;i \u003c spikeNum; i++) {\n            leftSpikes[Math.floor(Math.random()*5)].hidden = false;\n        }\n        rightSpikes.forEach(function(spike){ spike.hidden = true; })\n    } else {\n        for(var i = 0;i \u003c spikeNum; i++) {\n            rightSpikes[Math.floor(Math.random()*5)].hidden = false;\n        }\n        leftSpikes.forEach(function(spike){ spike.hidden = true; })\n    }\n    \n}","created_at":"2017-03-01T20:52:04.729+08:00","updated_at":"2019-11-10T06:14:32.298+08:00","name":"Don't touch the spike","language":"javascript","screenshot":{"url":"https://cdn0.koding.school/uploads/project/screenshot/9408/89edcce60b8890776f43b51e69f48ea4.jpg"},"parent_id":9361,"plugin":"","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":365,"hashid":"36ysmere","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}

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