firework animation | JavaScript 程式專案

{"id":9848,"student_id":70,"content":"setBackdrop(\"black\");\n\nvar lights = [];\n\n\nforever(function(){\n    for(var i=0; i\u003c20; i++) {\n        var light = {\n            x: cursor.x,\n            y: cursor.y,\n            vx: Math.random()*8 - 4,\n            vy: Math.random()*8 - 4,\n            color: 'rgb(' + Math.floor(Math.random()*255) + ',' + Math.floor(Math.random()*255) + ',' + Math.floor(Math.random()*255) + ')',\n            life: Math.random()*100\n        }\n        lights.push(light);\n    }\n    for(var i=0; i\u003clights.length; i++) {\n        var light = lights[i];\n        light.x += light.vx;\n        light.y += light.vy;\n        light.vy += 0.1;\n        light.life--;\n\n        if(light.life \u003c 0) {\n            lights.splice(i, 1);\n            i--;\n        }\n    }\n\n    for(var i=0; i\u003clights.length; i++) {\n        var light = lights[i];\n        pen.size = 0;\n        pen.fillColor = light.color;\n        pen.drawCircle(light.x, light.y, 6*light.life/100);\n    }\n\n});\n\n","created_at":"2017-03-01T20:52:04.729+08:00","updated_at":"2019-11-11T07:32:08.823+08:00","name":"firework animation","language":"javascript","screenshot":{"url":"https://cdn7.koding.school/uploads/project/screenshot/9848/b0a44e7e26fa2d8ef853c8df3261b002.jpg"},"parent_id":9824,"plugin":"","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":320,"hashid":"zpesjjqm","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}