[ Launch: movable point on circle ] 10907432 by karlin
[ Launch: movable point on circle ] 9845680 by i-blis
-
-
Save karlin/10907432 to your computer and use it in GitHub Desktop.
movable point on circle
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
{"description":"movable point on circle","endpoint":"","display":"svg","public":true,"require":[],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"_.md":{"default":true,"vim":false,"emacs":false,"fontSize":12},"config.json":{"default":true,"vim":false,"emacs":false,"fontSize":12}},"fullscreen":false,"play":false,"loop":false,"restart":false,"autoinit":true,"pause":true,"loop_type":"pingpong","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01,"ajax-caching":true} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
var svg = d3.select("svg"); | |
var cx = tributary.sw/2, | |
cy = tributary.sh/2, | |
r = 200; | |
var orbit = svg.append("circle") | |
.attr({ | |
cx: cx, | |
cy: cy, | |
r: r, | |
fill: "none", | |
stroke: "#5e5e5e", | |
"stroke-width": 5 | |
}); | |
var point = svg.append("circle") | |
.attr({ | |
cx: cx + r, | |
cy: cy, | |
r: r/20 | |
}); | |
var drag = d3.behavior.drag() | |
.on("drag", function() { | |
var mx = d3.mouse(this)[0] - cx; | |
var my = d3.mouse(this)[1] - cy; | |
var angle = Math.atan2(mx, my); | |
var nx = r * Math.sin(angle) + cx; | |
var ny = r * Math.cos(angle) + cy; | |
point.attr({ | |
cx: nx, | |
cy: ny | |
}) | |
}); | |
point.call(drag); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment