An example of interpolating only the rotate component of an SVG transform.
Created
July 24, 2012 16:32
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SVG transform interpolation
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| <!DOCTYPE html> | |
| <style> | |
| circle { | |
| fill: none; | |
| stroke: #000; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v2.min.js"></script> | |
| <script> | |
| var width = 400, | |
| height = 400; | |
| var svg = d3.select("body").selectAll("svg") | |
| .data([0, 1]) | |
| .enter().append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var g = svg.append("g") | |
| .attr("transform", "translate(200,200)"); | |
| g.append("circle") | |
| .attr("r", 100); | |
| var text = g.append("text") | |
| .attr("transform", "rotate(180)translate(0,-100)") | |
| .attr("dy", "-.3em") | |
| .text("a"); | |
| text.filter(function(d) { return !d; }).transition() | |
| .duration(1000) | |
| .attr("transform", "rotate(360)translate(0,-100)"); | |
| text.filter(function(d) { return d; }).transition() | |
| .duration(1000) | |
| .attrTween("transform", function() { | |
| var rotate0 = this.transform.baseVal.getItem(0).angle, | |
| interpolate = d3.interpolateNumber(rotate0, 360); | |
| return function(t) { | |
| return "rotate(" + interpolate(t) + ")translate(0,-100)"; | |
| }; | |
| }); | |
| </script> |
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