// TODO clockwise
define(function (require) {
var zrUtil = require('zrender/core/util');
var IndicatorAxis = require('./IndicatorAxis');
var IntervalScale = require('../../scale/Interval');
var numberUtil = require('../../util/number');
var axisHelper = require('../axisHelper');
function Radar(radarModel, ecModel, api) {
this._model = radarModel;
/**
* Radar dimensions
* @type {Array.<string>}
*/
this.dimensions = [];
this._indicatorAxes = zrUtil.map(radarModel.getIndicatorModels(), function (indicatorModel, idx) {
var dim = 'indicator_' + idx;
var indicatorAxis = new IndicatorAxis(dim, new IntervalScale());
indicatorAxis.name = indicatorModel.get('name');
// Inject model and axis
indicatorAxis.model = indicatorModel;
indicatorModel.axis = indicatorAxis;
this.dimensions.push(dim);
return indicatorAxis;
}, this);
this.resize(radarModel, api);
/**
* @type {number}
* @readOnly
*/
this.cx;
/**
* @type {number}
* @readOnly
*/
this.cy;
/**
* @type {number}
* @readOnly
*/
this.r;
/**
* @type {number}
* @readOnly
*/
this.startAngle;
}
Radar.prototype.getIndicatorAxes = function () {
return this._indicatorAxes;
};
Radar.prototype.dataToPoint = function (value, indicatorIndex) {
var indicatorAxis = this._indicatorAxes[indicatorIndex];
return this.coordToPoint(indicatorAxis.dataToCoord(value), indicatorIndex);
};
Radar.prototype.coordToPoint = function (coord, indicatorIndex) {
var indicatorAxis = this._indicatorAxes[indicatorIndex];
var angle = indicatorAxis.angle;
var x = this.cx + coord * Math.cos(angle);
var y = this.cy - coord * Math.sin(angle);
return [x, y];
};
Radar.prototype.pointToData = function (pt) {
var dx = pt[0] - this.cx;
var dy = pt[1] - this.cy;
var radius = Math.sqrt(dx * dx + dy * dy);
dx /= radius;
dy /= radius;
var radian = Math.atan2(-dy, dx);
// Find the closest angle
// FIXME index can calculated directly
var minRadianDiff = Infinity;
var closestAxis;
var closestAxisIdx = -1;
for (var i = 0; i < this._indicatorAxes.length; i++) {
var indicatorAxis = this._indicatorAxes[i];
var diff = Math.abs(radian - indicatorAxis.angle);
if (diff < minRadianDiff) {
closestAxis = indicatorAxis;
closestAxisIdx = i;
minRadianDiff = diff;
}
}
return [closestAxisIdx, +(closestAxis && closestAxis.coodToData(radius))];
};
Radar.prototype.resize = function (radarModel, api) {
var center = radarModel.get('center');
var viewWidth = api.getWidth();
var viewHeight = api.getHeight();
var viewSize = Math.min(viewWidth, viewHeight) / 2;
this.cx = numberUtil.parsePercent(center[0], viewWidth);
this.cy = numberUtil.parsePercent(center[1], viewHeight);
this.startAngle = radarModel.get('startAngle') * Math.PI / 180;
this.r = numberUtil.parsePercent(radarModel.get('radius'), viewSize);
zrUtil.each(this._indicatorAxes, function (indicatorAxis, idx) {
indicatorAxis.setExtent(0, this.r);
var angle = (this.startAngle + idx * Math.PI * 2 / this._indicatorAxes.length);
// Normalize to [-PI, PI]
angle = Math.atan2(Math.sin(angle), Math.cos(angle));
indicatorAxis.angle = angle;
}, this);
};
Radar.prototype.update = function (ecModel, api) {
var indicatorAxes = this._indicatorAxes;
var radarModel = this._model;
zrUtil.each(indicatorAxes, function (indicatorAxis) {
indicatorAxis.scale.setExtent(Infinity, -Infinity);
});
ecModel.eachSeriesByType('radar', function (radarSeries, idx) {
if (radarSeries.get('coordinateSystem') !== 'radar'
|| ecModel.getComponent('radar', radarSeries.get('radarIndex')) !== radarModel
) {
return;
}
var data = radarSeries.getData();
zrUtil.each(indicatorAxes, function (indicatorAxis) {
indicatorAxis.scale.unionExtent(data.getDataExtent(indicatorAxis.dim));
});
}, this);
var splitNumber = radarModel.get('splitNumber');
function increaseInterval(interval) {
var exp10 = Math.pow(10, Math.floor(Math.log(interval) / Math.LN10));
// Increase interval
var f = interval / exp10;
if (f === 2) {
f = 5;
}
else { // f is 2 or 5
f *= 2;
}
return f * exp10;
}
// Force all the axis fixing the maxSplitNumber.
zrUtil.each(indicatorAxes, function (indicatorAxis, idx) {
var rawExtent = axisHelper.getScaleExtent(indicatorAxis, indicatorAxis.model);
axisHelper.niceScaleExtent(indicatorAxis, indicatorAxis.model);
var axisModel = indicatorAxis.model;
var scale = indicatorAxis.scale;
var fixedMin = axisModel.get('min');
var fixedMax = axisModel.get('max');
var interval = scale.getInterval();
if (fixedMin != null && fixedMax != null) {
// User set min, max, divide to get new interval
// FIXME precision
scale.setInterval(
(fixedMax - fixedMin) / splitNumber
);
}
else if (fixedMin != null) {
var max;
// User set min, expand extent on the other side
do {
max = fixedMin + interval * splitNumber;
scale.setExtent(+fixedMin, max);
// Interval must been set after extent
// FIXME
scale.setInterval(interval);
interval = increaseInterval(interval);
} while (max < rawExtent[1] && isFinite(max) && isFinite(rawExtent[1]));
}
else if (fixedMax != null) {
var min;
// User set min, expand extent on the other side
do {
min = fixedMax - interval * splitNumber;
scale.setExtent(min, +fixedMax);
scale.setInterval(interval);
interval = increaseInterval(interval);
} while (min > rawExtent[0] && isFinite(min) && isFinite(rawExtent[0]));
}
else {
var nicedSplitNumber = scale.getTicks().length - 1;
if (nicedSplitNumber > splitNumber) {
interval = increaseInterval(interval);
}
// PENDING
var center = Math.round((rawExtent[0] + rawExtent[1]) / 2 / interval) * interval;
var halfSplitNumber = Math.round(splitNumber / 2);
scale.setExtent(
numberUtil.round(center - halfSplitNumber * interval),
numberUtil.round(center + (splitNumber - halfSplitNumber) * interval)
);
scale.setInterval(interval);
}
});
};
/**
* Radar dimensions is based on the data
* @type {Array}
*/
Radar.dimensions = [];
Radar.create = function (ecModel, api) {
var radarList = [];
ecModel.eachComponent('radar', function (radarModel) {
var radar = new Radar(radarModel, ecModel, api);
radarList.push(radar);
radarModel.coordinateSystem = radar;
});
ecModel.eachSeriesByType('radar', function (radarSeries) {
if (radarSeries.get('coordinateSystem') === 'radar') {
// Inject coordinate system
radarSeries.coordinateSystem = radarList[radarSeries.get('radarIndex') || 0];
}
});
return radarList;
};
require('../../CoordinateSystem').register('radar', Radar);
return Radar;
});
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