在Android Java方面，可以使用以下代码将var width = 960,
height = 500,
radius = Math.min(width, height) / 2 - 10;
var data=[
{
"age": "<5",
"population": 2704659
},
{
"age": "5-13",
"population": 4499890
},
{
"age": "14-17",
"population": 2159981
},
{
"age": "18-24",
"population": 3853788
},
{
"age": "25-44",
"population": 14106543
},
{
"age": "45-64",
"population": 8819342
},
{
"age": "≥65",
"population": 612463
}
];
var color = d3.scale.category20();
var arc = d3.svg.arc()
.outerRadius(radius);
var pie = d3.layout.pie()
.sort(null)
.value(function(d) { return d.population; });
var labelArc = d3.svg.arc()
.outerRadius(radius - 40)
.innerRadius(radius - 40);
var svg = d3.select("body").append("svg")
.datum(data)
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
var arcs = svg.selectAll("g.arc")
.data(pie)
.enter().append("g")
.attr("class", "arc");
arcs.append("path")
.attr("fill", function(d, i) { return color(i); }).on("mouseenter", function(d) {
var endAngle = d.endAngle + 0.2;
var startAngle = d.startAngle - 0.2;
var arcOver = d3.svg.arc()
.outerRadius(radius + 10).endAngle(endAngle).startAngle(startAngle);
d3.select(this)
.attr("stroke","white")
.transition()
.ease("bounce")
.duration(1000)
.attr("d", arcOver)
.attr("stroke-width",6);
})
.on("mouseleave", function(d) {
d3.select(this).transition()
.attr("d", arc)
.attr("stroke","none");
})
.transition()
.ease("bounce")
.duration(2000)
.attrTween("d", tweenPie).attr("d", arc);
function tweenPie(b) {
b.innerRadius = 0;
var i = d3.interpolate({startAngle: 0, endAngle: 0}, b);
return function(t) { return arc(i(t)); };
}
arcs.append("text")
.attr("transform", function(d) { return "translate(" + labelArc.centroid(d) + ")"; })
.attr("dy", ".35em")
.text(function(d) { return d.data.age; });
function type(d) {
d.population = +d.population;
return d;
}
</script>
输出到GL纹理。
mediacodec但是如何在NDK中做到这一点？
我可以使用int [] hTex = new int[1];
GLES20.glGenTextures(1, hTex, 0);
SurfaceTexture mSTexture = new SurfaceTexture(hTex[0]);
Surface s = new Surface(mSTexture);
mPlayer = new PlayerThread(s);
创建GL纹理，但glGenTextures的参数类型是AMediaCodec_configure，有没有办法转换它？