starling-framework/lib/_gen/starling/geom/Ellipse.js

A fast, productive library for 2D cross-platform development.

// Class: starling.geom.Ellipse

var $global = typeof window != "undefined" ? window : typeof global != "undefined" ? global : typeof self != "undefined" ? self : this

$global.Object.defineProperty(exports, "__esModule", {value: true});

var __map_reserved = {};

// Imports

var $hxClasses = require("./../../hxClasses_stub").default;
var $import = require("./../../import_stub").default;
var $extend = require("./../../extend_stub").default;
function starling_geom_ImmutablePolygon() {return require("./../../starling/geom/ImmutablePolygon");}
function Std() {return require("./../../Std");}
function starling_rendering_IndexData() {return require("./../../starling/rendering/IndexData");}

// Constructor

var Ellipse = function(x,y,radiusX,radiusY,numSides) {
	if(numSides == null) {
		numSides = -1;
	}
	this.__x = x;
	this.__y = y;
	this.__radiusX = radiusX;
	this.__radiusY = radiusY;
	(starling_geom_ImmutablePolygon().default).call(this,this.getVertices(numSides));
}

// Meta

Ellipse.__name__ = ["starling","geom","Ellipse"];
Ellipse.__super__ = (starling_geom_ImmutablePolygon().default);
Ellipse.prototype = $extend((starling_geom_ImmutablePolygon().default).prototype, {
	getVertices: function(numSides) {
		if(numSides < 0) {
			numSides = (Std().default)["int"](Math.PI * (this.__radiusX + this.__radiusY) / 4.0);
		}
		if(numSides < 6) {
			numSides = 6;
		}
		var vertices = [];
		var angleDelta = 2 * Math.PI / numSides;
		var angle = 0;
		var _g1 = 0;
		var _g = numSides;
		while(_g1 < _g) {
			var i = _g1++;
			vertices[i * 2] = Math.cos(angle) * this.__radiusX + this.__x;
			vertices[i * 2 + 1] = Math.sin(angle) * this.__radiusY + this.__y;
			angle += angleDelta;
		}
		return vertices;
	},
	triangulate: function(indexData,offset) {
		if(offset == null) {
			offset = 0;
		}
		if(indexData == null) {
			indexData = new (starling_rendering_IndexData().default)((this.get_numVertices() - 2) * 3);
		}
		var from = 1;
		var to = this.get_numVertices() - 1;
		var _g1 = from;
		var _g = to;
		while(_g1 < _g) {
			var i = _g1++;
			indexData.addTriangle(offset,offset + i,offset + i + 1);
		}
		return indexData;
	},
	contains: function(x,y) {
		var vx = x - this.__x;
		var vy = y - this.__y;
		var a = vx / this.__radiusX;
		var b = vy / this.__radiusY;
		return a * a + b * b <= 1;
	},
	get_area: function() {
		return Math.PI * this.__radiusX * this.__radiusY;
	},
	get_isSimple: function() {
		return true;
	},
	get_isConvex: function() {
		return true;
	}
});
Ellipse.prototype.__class__ = Ellipse.prototype.constructor = $hxClasses["starling.geom.Ellipse"] = Ellipse;

// Init



// Statics




// Export

exports.default = Ellipse;