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Copy patharea.js
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89 lines (75 loc) · 1.8 KB
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function d3_svg_area(projection) {
var x0 = d3_svg_lineX,
x1 = d3_svg_lineX,
y0 = 0,
y1 = d3_svg_lineY,
interpolate,
i0,
i1,
tension = .7;
function area(d) {
if (d.length < 1) return null;
var points0 = d3_svg_linePoints(this, d, x0, y0),
points1 = d3_svg_linePoints(this, d, x0 === x1 ? d3_svg_areaX(points0) : x1, y0 === y1 ? d3_svg_areaY(points0) : y1);
return "M" + i0(projection(points1), tension)
+ "L" + i1(projection(points0.reverse()), tension)
+ "Z";
}
area.x = function(x) {
if (!arguments.length) return x1;
x0 = x1 = x;
return area;
};
area.x0 = function(x) {
if (!arguments.length) return x0;
x0 = x;
return area;
};
area.x1 = function(x) {
if (!arguments.length) return x1;
x1 = x;
return area;
};
area.y = function(y) {
if (!arguments.length) return y1;
y0 = y1 = y;
return area;
};
area.y0 = function(y) {
if (!arguments.length) return y0;
y0 = y;
return area;
};
area.y1 = function(y) {
if (!arguments.length) return y1;
y1 = y;
return area;
};
area.interpolate = function(x) {
if (!arguments.length) return interpolate;
i0 = d3_svg_lineInterpolators[interpolate = x];
i1 = i0.reverse || i0;
return area;
};
area.tension = function(x) {
if (!arguments.length) return tension;
tension = x;
return area;
};
return area.interpolate("linear");
}
d3_svg_lineStepBefore.reverse = d3_svg_lineStepAfter;
d3_svg_lineStepAfter.reverse = d3_svg_lineStepBefore;
d3.svg.area = function() {
return d3_svg_area(Object);
};
function d3_svg_areaX(points) {
return function(d, i) {
return points[i][0];
};
}
function d3_svg_areaY(points) {
return function(d, i) {
return points[i][1];
};
}