蒙地卡羅求 PI 副本 | JavaScript 程式專案

{"id":41358,"student_id":283,"content":"stopRendering();\npen.size = 0;\n\npen.fillColor = \"white\";\npen.drawRect(0, 0, 640, 480);\n\n// for(var i = 0; i \u003c 1000; i++){\n// var x = Math.floor(Math.random()*480);\n// var y = Math.floor(Math.random()*480);\n\n// pen.fillColor = \"red\";\n// pen.drawRect(x,y,5,5);\n// }\n\n// var centerX = 240;\n// var centerY = 240;\n// pen.fillColor = \"black\";\n// pen.drawRect(centerX,centerY,5,5);\n\n// var x = Math.floor(Math.random()*480);\n// var y = Math.floor(Math.random()*480);\n// pen.fillColor = \"red\";\n// pen.drawRect(x,y,5,5);\n\n// console.log(Math.sqrt((x - 240)*(x - 240)+(y - 240)*(y - 240)));\nvar a = 0;\nvar b = 0;\n\nforever(function() {\n    for (var i = 0; i \u003c 100; i++) {\n        var x = Math.floor(Math.random()*480);\n        var y = Math.floor(Math.random()*480);\n        var d = (Math.sqrt((x - 240)*(x - 240)+(y - 240)*(y - 240)));\n\n        a++;\n        if(d \u003c 240){//圓的半徑為240,所以如果小於240代表點點在圓圈內\n            pen.fillColor = \"orange\";\n            b++;\n        }else{\n            pen.fillColor = \"red\";\n        }\n        pen.drawRect(x,y,1,1);\n        \n    }\n        pen.fillColor = \"white\";\n        pen.drawRect(0, 0, 200, 35);\n        print('PI: ' +b*4/a,10,10);\n});","created_at":"2018-09-08T10:14:15.256+08:00","updated_at":"2019-10-28T17:47:27.555+08:00","name":"蒙地卡羅求 PI 副本","language":"javascript","screenshot":{"url":"https://cdn4.koding.school/uploads/project/screenshot/41358/ca721e7017a527aef65531736efc21d7.jpg"},"parent_id":31606,"plugin":"","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":93,"hashid":"4y3s32m2","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}