[{"data":1,"prerenderedAt":410},["ShallowReactive",2],{"project-6133796":3},{"id":4,"name":5,"line":6,"line_source":7,"title":8,"url":9,"domain":10,"maker":11,"posted_at":12,"year":13,"points":14,"comments":15,"rank_in_year":16,"shown_in_year":17,"top":18,"tier":19,"category":20,"subcategory":21,"format":22,"keywords":23,"reception":29,"sentiment":30,"stance_mix":31,"scored_comments":36,"aspects":37,"strip":45,"post_text":46,"what":47,"said":88,"maker_in_thread":220,"shape":229,"grid":233,"attempts":373,"same_week":374,"maker_shows":40,"maker_hidden":402,"reader_version":403,"card":404},"6133796","GearSketch","Sketch, connect and simulate gears and chains","title","Show HN: Sketch, connect and simulate gears and chains","https:\u002F\u002Fgithub.com\u002Ffrankleenaars\u002Fgearsketch","github.com","frankl",1375280154,2013,201,58,73,1739,5,"notable","learning_science","educational simulation","web_app",[24,25,26,27,28],"gear simulator","mechanical simulation","gears and chains","physics education","canvas drawing","mixed",0.255,{"positive":32,"neutral":33,"mixed":34,"critical":35},11,14,4,3,32,{"design":38,"idea":41,"execution":44},{"positive":39,"critical":40},2,1,{"positive":42,"critical":43},6,0,{"positive":40,"critical":39},[43,43,43,43,43,35,43,43,43,43,43,43,43,43,43,35,18,35,18,35,35,18,18,43,35,35,35,35,18,35,43,18,18,35,18,18,40,40,35,35],null,{"problem":48,"audience":55,"pricing":46,"motivation":59,"time_to_build":46,"stack":63,"openness":86,"stage":87,"team_size":86},{"value":49,"source":50,"evidence":51},"Lets users draw and simulate gears and chains to understand gear mechanics","maker",[52],{"id":53,"by":11,"text":54},"6134464","Currently there's no todo list with features like other types of gears, more easily creating gears of specific sizes and the like, but I would very much welcome contributions of…",{"value":56,"source":50,"evidence":57},"Students aged 10-11 and people learning about gears",[58],{"id":53,"by":11,"text":54},{"value":60,"source":50,"evidence":61},"Used in the maker's PhD research on support for learning about gears; ported from Java to work on mobile",[62],{"id":53,"by":11,"text":54},[64,72,79],{"value":65,"source":66,"evidence":67},"CoffeeScript","commenter",[68],{"id":69,"by":70,"text":71},"6134166","bockris","I've played a bit on my desktop browser and it's fun! Can't wait to show it to my kids. I've looked for similar things a long time ago and only found Java apps\u002Fapplets. I like…",{"value":73,"source":66,"evidence":74},"JavaScript",[75],{"id":76,"by":77,"text":78},"6135090","ne0phyte","Uncaught TypeError: Type error - gearsketch_main.js:53 Am I the only one getting this? Chrome 28; Windows 7.",{"value":80,"source":66,"evidence":81},"HTML canvas",[82],{"id":83,"by":84,"text":85},"6137240","neckro23","This is pretty neat. I've been doing a similar thing lately (rendering arbitrary-sized bicycle chainrings in SVG), so I have gears on the brain. I'm surprised this one uses…","unknown","launched",{"praise":89,"objections":113,"requests":145,"questions":188,"alternatives":197},[90,102],{"value":91,"source":66,"evidence":92},"Fun and intuitive to use",[93,97,101],{"id":94,"by":95,"text":96},"6134950","caseorganic","Love this! It's very intuitive and fun to draw gears of different sizes and hook them together. I'd love to be able to make more complex gears. I immediately tried to make a…",{"id":98,"by":99,"text":100},"6134868","brbcoding","I have no real use for this, but that didn't stop me from playing with it for 30 minutes!",{"id":69,"by":70,"text":71},{"value":103,"source":66,"evidence":104},"Works well on touchscreens",[105,109],{"id":106,"by":107,"text":108},"6134074","xutopia","I just tried it on Chrome on desktop and it is usable. I think the touch just makes the experience better.",{"id":110,"by":111,"text":112},"6134315","milesokeefe","Very good experience on the latest iPad. I wish there was a way to delete gears though. Also having the play button toggle pause\u002Fplay would be nice.",[114,133,141],{"value":115,"source":66,"evidence":116},"Hard to use with a mouse or touchpad",[117,121,125,129],{"id":118,"by":119,"text":120},"6134415","Sunlis","Great for touchscreen, but tricky with a mouse. I would like to see an option for drawing gears where mouse down sets the center of a new gear and dragging away determines the…",{"id":122,"by":123,"text":124},"6134245","canthonytucci","This is cool but I'm learning quite quickly that I'm no good at drawing circles with my mouse, perhaps a bit more forgivness when using the gear drawing tool might make life a…",{"id":126,"by":127,"text":128},"6134582","instakill","Impossible to add the chains with a touchpad.",{"id":130,"by":131,"text":132},"6137327","hamburglar","Agreed, and some controls that allow you to specify the radius of a gear instead of drawing it would help, too. I spent a long time trying to draw two gears with the same number…",{"value":134,"source":66,"evidence":135},"Chains are hard to add",[136,137],{"id":126,"by":127,"text":128},{"id":138,"by":139,"text":140},"6134781","matthuggins","Same problem on my Galaxy Nexus, I tried all combinations of placing a belt, and it just wouldn't work.",{"value":142,"source":66,"evidence":143},"Error on Chrome on Windows 7",[144],{"id":76,"by":77,"text":78},[146,155,166,170,181],{"value":147,"source":66,"evidence":148},"Draw gears by radius or diameter",[149,150,151],{"id":118,"by":119,"text":120},{"id":130,"by":131,"text":132},{"id":152,"by":153,"text":154},"6136307","gcb0","Will probably send a pull request just to be able to draw gears by the diameter or radius instead of the perimeter. can't even draw a square with the clitmouse...",{"value":156,"source":66,"evidence":157},"Permalink or save and share configurations",[158,162],{"id":159,"by":160,"text":161},"6134462","basicallydan","This is really cool! The ability to save a configuration and share it would be pretty cool, but as well as that, other objects such as sticks which are attached to gears would be…",{"id":163,"by":164,"text":165},"6136057","tantalor","Please add a permalink feature.",{"value":167,"source":66,"evidence":168},"Delete gears and pause\u002Fplay toggle",[169],{"id":110,"by":111,"text":112},{"value":171,"source":66,"evidence":172},"More gear types such as non-circular gears and involute teeth",[173,177],{"id":174,"by":175,"text":176},"6134190","nicpottier","Really enjoy the different take on the interface.. feel like you might be missing something in having modality though, seems like you could combine the actions for drawing a gear…",{"id":178,"by":179,"text":180},"6136121","yyao","Very fun! Ideas: - draw involute teeth forms - allow non circular gears - add other linkages - plot force (torque) and velocity (rotational velocity) against time or position…",{"value":182,"source":66,"evidence":183},"Rods and cams",[184,187],{"id":185,"by":164,"text":186},"6136148","Rods and cams would be the next logical step.",{"id":159,"by":160,"text":161},[189,193],{"value":190,"source":66,"evidence":191},"Why canvas instead of SVG",[192],{"id":83,"by":84,"text":85},{"value":194,"source":66,"evidence":195},"Is there a todo features list",[196],{"id":69,"by":70,"text":71},[198,202,209],{"value":199,"source":66,"evidence":200},"Java applets for gear simulation",[201],{"id":69,"by":70,"text":71},{"value":203,"source":66,"evidence":204},"Geometry construction puzzle app",[205],{"id":206,"by":207,"text":208},"6136108","gknoy","Absolutely what I was about to post. For a mouse user, mimicing the circle construction mechanics (with preview!) used in the geometry construction puzzle app that was linked a…",{"value":210,"source":66,"evidence":211},"Arthur Ganson gear sculptures",[212,216],{"id":213,"by":214,"text":215},"6135358","cespare","There's an art\u002Fscience experiment piece on display at the Exploratium (unfortunately I can't remember what it's called) that has a similar construction. The gear at one end is…",{"id":217,"by":218,"text":219},"6138147","acomjean","reminds me of Arthur Ganson, artist who sometimes makes homemade gears. Has fun with gear ratios too (I think the machine with concrete will spin 1 revolution in 10000yrs if I…",{"comments":35,"answered":39,"key":221},[222,225,226],{"id":223,"text":224},"6134010","I tested it on my 2010 android phone and it just barely works on that. More recent android tablets should be able to run it quite smoothly.",{"id":53,"text":54},{"id":227,"text":228},"6134607","Using it with a touchpad is far from ideal, but you should be able to manage it by drawing the chain very widely around the gears. The chain will be tightened automatically.",{"commenters":230,"max_depth":18,"maker_replies":35,"first_comment_mins":231,"lifespan_hours":232},40,24,52,[234,238,242,244,246,248,251,253,257,260,262,265,267,269,270,272,274,276,279,282,284,287,290,292,296,298,299,301,303,304,305,306,307,308,311,314,318,320,324,326,328,330,333,336,338,340,341,343,345,347,351,355,357,360,362,364,367,369],[235,43,43,236,237,43],"6134947","other\u002Fneutral\u002Fidea","lifeformed",[239,43,43,240,241,43],"6135020","other\u002Fneutral\u002Fnone","ultimoo",[243,43,43,236,237,43],"6135118",[245,43,43,240,241,43],"6135276",[247,43,43,240,237,43],"6135329",[249,43,43,240,250,43],"6135991","bmelton",[252,43,43,240,237,43],"6138462",[254,43,35,255,256,43],"6135143","project\u002Fneutral\u002Fnone","kvnn",[258,43,43,236,259,43],"6135160","mhb",[261,43,43,236,237,43],"6135196",[263,43,43,236,264,43],"6135168","ISL",[266,43,43,236,237,43],"6135223",[268,43,43,236,241,43],"6135253",[213,43,43,236,214,43],[271,43,43,240,70,43],"6135403",[273,43,43,240,214,43],"6135425",[275,43,43,236,153,43],"6136282",[277,43,43,236,278,43],"6136833","jameshart",[280,43,43,240,281,43],"6138479","pfraze",[283,43,43,240,278,43],"6147681",[285,43,43,286,281,43],"6148544","commenter\u002Fneutral\u002Fnone",[288,43,43,236,289,43],"6137110","mapt",[118,40,35,291,119,43],"project\u002Fmixed\u002Fdesign",[293,40,18,294,295,43],"6134927","project\u002Fpositive\u002Fdesign","91bananas",[206,40,35,297,207,43],"project\u002Fneutral\u002Fdesign",[130,40,35,291,131,43],[159,39,18,300,160,43],"project\u002Fpositive\u002Fidea",[185,39,35,302,164,43],"project\u002Fneutral\u002Fidea",[122,35,35,291,123,43],[152,35,35,297,153,43],[98,34,18,300,99,43],[94,18,18,300,95,43],[174,42,18,300,175,43],[309,42,43,240,310,43],"6134923","Sukotto",[312,42,35,255,313,43],"6135206","reeses",[315,316,35,302,317,43],"6135469",7,"kylebrown",[178,319,35,302,179,43],8,[321,322,35,255,323,43],"6139524",9,"EzGraphs",[110,325,35,291,111,43],10,[327,325,35,297,119,43],"6134346",[329,325,35,297,70,43],"6134363",[331,32,18,300,332,43],"6134086","jawerty",[334,335,35,255,70,43],"6133968",12,[223,335,43,337,11,40],"maker\u002Fneutral\u002Fnone",[69,335,18,339,70,43],"project\u002Fpositive\u002Fnone",[53,335,43,337,11,40],[106,335,18,342,107,43],"project\u002Fpositive\u002Fexecution",[163,344,35,297,164,43],13,[83,33,35,346,84,43],"project\u002Fneutral\u002Fexecution",[348,349,18,294,350,43],"6134864",15,"jack-r-abbit",[352,353,18,300,354,43],"6135073",16,"jmanamj",[217,356,43,240,218,43],17,[126,358,40,359,127,43],18,"project\u002Fcritical\u002Fdesign",[227,358,43,361,11,40],"maker\u002Fneutral\u002Fdesign",[138,358,40,363,139,43],"project\u002Fcritical\u002Fexecution",[365,358,35,297,366,43],"6137674","bherms",[76,368,40,363,77,43],19,[370,371,18,339,372,43],"6138944",20,"mdturnerphys",[],[375,380,385,389,393,398],{"id":376,"name":377,"points":378,"category":379},"6128700","CoreOS",417,"infrastructure",{"id":381,"name":382,"points":383,"category":384},"6114023","blinklink.me",143,"productivity",{"id":386,"name":387,"points":388,"category":379},"6112349","boxcars",106,{"id":390,"name":391,"points":392,"category":20},"6134789","Bitcast.io",82,{"id":394,"name":395,"points":396,"category":397},"6119797","git-deliver",66,"dev_tools",{"id":399,"name":400,"points":401,"category":384},"6134616","Skipper",65,false,"v2",{"id":405,"name":5,"line":6,"ai":402,"cat":20,"year":13,"points":14,"comments":15,"rec":29,"s":406,"top":18,"kw":407,"maker":11,"domain":10,"tier":19,"attempts":43,"strip":408,"url":9,"mix":409,"praise":91,"objection":115,"sub":21},6133796,0.26,[24,25,26,27,28],"0000030000000003535335503333530553551133",[32,33,34,35],1793990896685]