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/**
* Line path for bezier and straight line draw
*/
define(function (require) {
var graphic = require('../../util/graphic');
var vec2 = require('zrender/core/vector');
var straightLineProto = graphic.Line.prototype;
var bezierCurveProto = graphic.BezierCurve.prototype;
function isLine(shape) {
return shape.cpx1 == null || shape.cpy1 == null;
}
return graphic.extendShape({
type: 'ec-line',
style: {
stroke: '#000',
fill: null
},
shape: {
x1: 0,
y1: 0,
x2: 0,
y2: 0,
percent: 1,
cpx1: null,
cpy1: null
},
buildPath: function (ctx, shape) {
(isLine(shape) ? straightLineProto : bezierCurveProto).buildPath(ctx, shape);
},
pointAt: function (t) {
return isLine(this.shape)
? straightLineProto.pointAt.call(this, t)
: bezierCurveProto.pointAt.call(this, t);
},
tangentAt: function (t) {
var shape = this.shape;
var p = isLine(shape)
? [shape.x2 - shape.x1, shape.y2 - shape.y1]
: bezierCurveProto.tangentAt.call(this, t);
return vec2.normalize(p, p);
}
});
});