@azerion/phaser
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A fast, free and fun HTML5 Game Framework for Desktop and Mobile web browsers.
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JavaScript
/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2016 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
/**
* Creates a new Circle object with the center coordinate specified by the x and y parameters and the diameter specified by the diameter parameter.
* If you call this function without parameters, a circle with x, y, diameter and radius properties set to 0 is created.
*
* @class Phaser.Circle
* @constructor
* @param {number} [x=0] - The x coordinate of the center of the circle.
* @param {number} [y=0] - The y coordinate of the center of the circle.
* @param {number} [diameter=0] - The diameter of the circle.
*/
Phaser.Circle = function (x, y, diameter) {
x = x || 0;
y = y || 0;
diameter = diameter || 0;
/**
* @property {number} x - The x coordinate of the center of the circle.
*/
this.x = x;
/**
* @property {number} y - The y coordinate of the center of the circle.
*/
this.y = y;
/**
* @property {number} _diameter - The diameter of the circle.
* @private
*/
this._diameter = diameter;
/**
* @property {number} _radius - The radius of the circle.
* @private
*/
this._radius = 0;
if (diameter > 0)
{
this._radius = diameter * 0.5;
}
/**
* @property {number} type - The const type of this object.
* @readonly
*/
this.type = Phaser.CIRCLE;
};
Phaser.Circle.prototype = {
/**
* The circumference of the circle.
*
* @method Phaser.Circle#circumference
* @return {number} The circumference of the circle.
*/
circumference: function () {
return 2 * (Math.PI * this._radius);
},
/**
* Returns a uniformly distributed random point from anywhere within this Circle.
*
* @method Phaser.Circle#random
* @param {Phaser.Point|object} [out] - A Phaser.Point, or any object with public x/y properties, that the values will be set in.
* If no object is provided a new Phaser.Point object will be created. In high performance areas avoid this by re-using an existing object.
* @return {Phaser.Point} An object containing the random point in its `x` and `y` properties.
*/
random: function (out) {
if (out === undefined) { out = new Phaser.Point(); }
var t = 2 * Math.PI * Math.random();
var u = Math.random() + Math.random();
var r = (u > 1) ? 2 - u : u;
var x = r * Math.cos(t);
var y = r * Math.sin(t);
out.x = this.x + (x * this.radius);
out.y = this.y + (y * this.radius);
return out;
},
/**
* Returns the framing rectangle of the circle as a Phaser.Rectangle object.
*
* @method Phaser.Circle#getBounds
* @return {Phaser.Rectangle} The bounds of the Circle.
*/
getBounds: function () {
return new Phaser.Rectangle(this.x - this.radius, this.y - this.radius, this.diameter, this.diameter);
},
/**
* Sets the members of Circle to the specified values.
* @method Phaser.Circle#setTo
* @param {number} x - The x coordinate of the center of the circle.
* @param {number} y - The y coordinate of the center of the circle.
* @param {number} diameter - The diameter of the circle.
* @return {Circle} This circle object.
*/
setTo: function (x, y, diameter) {
this.x = x;
this.y = y;
this._diameter = diameter;
this._radius = diameter * 0.5;
return this;
},
/**
* Copies the x, y and diameter properties from any given object to this Circle.
* @method Phaser.Circle#copyFrom
* @param {any} source - The object to copy from.
* @return {Circle} This Circle object.
*/
copyFrom: function (source) {
return this.setTo(source.x, source.y, source.diameter);
},
/**
* Copies the x, y and diameter properties from this Circle to any given object.
* @method Phaser.Circle#copyTo
* @param {any} dest - The object to copy to.
* @return {object} This dest object.
*/
copyTo: function (dest) {
dest.x = this.x;
dest.y = this.y;
dest.diameter = this._diameter;
return dest;
},
/**
* Returns the distance from the center of the Circle object to the given object
* (can be Circle, Point or anything with x/y properties)
* @method Phaser.Circle#distance
* @param {object} dest - The target object. Must have visible x and y properties that represent the center of the object.
* @param {boolean} [round=false] - Round the distance to the nearest integer.
* @return {number} The distance between this Point object and the destination Point object.
*/
distance: function (dest, round) {
var distance = Phaser.Math.distance(this.x, this.y, dest.x, dest.y);
return round ? Math.round(distance) : distance;
},
/**
* Returns a new Circle object with the same values for the x, y, width, and height properties as this Circle object.
* @method Phaser.Circle#clone
* @param {Phaser.Circle} output - Optional Circle object. If given the values will be set into the object, otherwise a brand new Circle object will be created and returned.
* @return {Phaser.Circle} The cloned Circle object.
*/
clone: function (output) {
if (output === undefined || output === null)
{
output = new Phaser.Circle(this.x, this.y, this.diameter);
}
else
{
output.setTo(this.x, this.y, this.diameter);
}
return output;
},
/**
* Return true if the given x/y coordinates are within this Circle object.
* @method Phaser.Circle#contains
* @param {number} x - The X value of the coordinate to test.
* @param {number} y - The Y value of the coordinate to test.
* @return {boolean} True if the coordinates are within this circle, otherwise false.
*/
contains: function (x, y) {
return Phaser.Circle.contains(this, x, y);
},
/**
* Returns a Point object containing the coordinates of a point on the circumference of the Circle based on the given angle.
* @method Phaser.Circle#circumferencePoint
* @param {number} angle - The angle in radians (unless asDegrees is true) to return the point from.
* @param {boolean} [asDegrees=false] - Is the given angle in radians (false) or degrees (true)?
* @param {Phaser.Point} [out] - An optional Point object to put the result in to. If none specified a new Point object will be created.
* @return {Phaser.Point} The Point object holding the result.
*/
circumferencePoint: function (angle, asDegrees, out) {
return Phaser.Circle.circumferencePoint(this, angle, asDegrees, out);
},
/**
* Adjusts the location of the Circle object, as determined by its center coordinate, by the specified amounts.
* @method Phaser.Circle#offset
* @param {number} dx - Moves the x value of the Circle object by this amount.
* @param {number} dy - Moves the y value of the Circle object by this amount.
* @return {Circle} This Circle object.
*/
offset: function (dx, dy) {
this.x += dx;
this.y += dy;
return this;
},
/**
* Adjusts the location of the Circle object using a Point object as a parameter. This method is similar to the Circle.offset() method, except that it takes a Point object as a parameter.
* @method Phaser.Circle#offsetPoint
* @param {Point} point A Point object to use to offset this Circle object (or any valid object with exposed x and y properties).
* @return {Circle} This Circle object.
*/
offsetPoint: function (point) {
return this.offset(point.x, point.y);
},
/**
* Returns a string representation of this object.
* @method Phaser.Circle#toString
* @return {string} a string representation of the instance.
*/
toString: function () {
return "[{Phaser.Circle (x=" + this.x + " y=" + this.y + " diameter=" + this.diameter + " radius=" + this.radius + ")}]";
}
};
Phaser.Circle.prototype.constructor = Phaser.Circle;
/**
* The largest distance between any two points on the circle. The same as the radius * 2.
*
* @name Phaser.Circle#diameter
* @property {number} diameter - Gets or sets the diameter of the circle.
*/
Object.defineProperty(Phaser.Circle.prototype, "diameter", {
get: function () {
return this._diameter;
},
set: function (value) {
if (value > 0)
{
this._diameter = value;
this._radius = value * 0.5;
}
}
});
/**
* The length of a line extending from the center of the circle to any point on the circle itself. The same as half the diameter.
* @name Phaser.Circle#radius
* @property {number} radius - Gets or sets the radius of the circle.
*/
Object.defineProperty(Phaser.Circle.prototype, "radius", {
get: function () {
return this._radius;
},
set: function (value) {
if (value > 0)
{
this._radius = value;
this._diameter = value * 2;
}
}
});
/**
* The x coordinate of the leftmost point of the circle. Changing the left property of a Circle object has no effect on the x and y properties. However it does affect the diameter, whereas changing the x value does not affect the diameter property.
* @name Phaser.Circle#left
* @propety {number} left - Gets or sets the value of the leftmost point of the circle.
*/
Object.defineProperty(Phaser.Circle.prototype, "left", {
get: function () {
return this.x - this._radius;
},
set: function (value) {
if (value > this.x)
{
this._radius = 0;
this._diameter = 0;
}
else
{
this.radius = this.x - value;
}
}
});
/**
* The x coordinate of the rightmost point of the circle. Changing the right property of a Circle object has no effect on the x and y properties. However it does affect the diameter, whereas changing the x value does not affect the diameter property.
* @name Phaser.Circle#right
* @property {number} right - Gets or sets the value of the rightmost point of the circle.
*/
Object.defineProperty(Phaser.Circle.prototype, "right", {
get: function () {
return this.x + this._radius;
},
set: function (value) {
if (value < this.x)
{
this._radius = 0;
this._diameter = 0;
}
else
{
this.radius = value - this.x;
}
}
});
/**
* The sum of the y minus the radius property. Changing the top property of a Circle object has no effect on the x and y properties, but does change the diameter.
* @name Phaser.Circle#top
* @property {number} top - Gets or sets the top of the circle.
*/
Object.defineProperty(Phaser.Circle.prototype, "top", {
get: function () {
return this.y - this._radius;
},
set: function (value) {
if (value > this.y)
{
this._radius = 0;
this._diameter = 0;
}
else
{
this.radius = this.y - value;
}
}
});
/**
* The sum of the y and radius properties. Changing the bottom property of a Circle object has no effect on the x and y properties, but does change the diameter.
* @name Phaser.Circle#bottom
* @property {number} bottom - Gets or sets the bottom of the circle.
*/
Object.defineProperty(Phaser.Circle.prototype, "bottom", {
get: function () {
return this.y + this._radius;
},
set: function (value) {
if (value < this.y)
{
this._radius = 0;
this._diameter = 0;
}
else
{
this.radius = value - this.y;
}
}
});
/**
* The area of this Circle.
* @name Phaser.Circle#area
* @property {number} area - The area of this circle.
* @readonly
*/
Object.defineProperty(Phaser.Circle.prototype, "area", {
get: function () {
if (this._radius > 0)
{
return Math.PI * this._radius * this._radius;
}
else
{
return 0;
}
}
});
/**
* Determines whether or not this Circle object is empty. Will return a value of true if the Circle objects diameter is less than or equal to 0; otherwise false.
* If set to true it will reset all of the Circle objects properties to 0. A Circle object is empty if its diameter is less than or equal to 0.
* @name Phaser.Circle#empty
* @property {boolean} empty - Gets or sets the empty state of the circle.
*/
Object.defineProperty(Phaser.Circle.prototype, "empty", {
get: function () {
return (this._diameter === 0);
},
set: function (value) {
if (value === true)
{
this.setTo(0, 0, 0);
}
}
});
/**
* Return true if the given x/y coordinates are within the Circle object.
* @method Phaser.Circle.contains
* @param {Phaser.Circle} a - The Circle to be checked.
* @param {number} x - The X value of the coordinate to test.
* @param {number} y - The Y value of the coordinate to test.
* @return {boolean} True if the coordinates are within this circle, otherwise false.
*/
Phaser.Circle.contains = function (a, x, y) {
// Check if x/y are within the bounds first
if (a.radius > 0 && x >= a.left && x <= a.right && y >= a.top && y <= a.bottom)
{
var dx = (a.x - x) * (a.x - x);
var dy = (a.y - y) * (a.y - y);
return (dx + dy) <= (a.radius * a.radius);
}
else
{
return false;
}
};
/**
* Determines whether the two Circle objects match. This method compares the x, y and diameter properties.
* @method Phaser.Circle.equals
* @param {Phaser.Circle} a - The first Circle object.
* @param {Phaser.Circle} b - The second Circle object.
* @return {boolean} A value of true if the object has exactly the same values for the x, y and diameter properties as this Circle object; otherwise false.
*/
Phaser.Circle.equals = function (a, b) {
return (a.x === b.x && a.y === b.y && a.diameter === b.diameter);
};
/**
* Determines whether the two Circle objects intersect.
* This method checks the radius distances between the two Circle objects to see if they intersect.
* @method Phaser.Circle.intersects
* @param {Phaser.Circle} a - The first Circle object.
* @param {Phaser.Circle} b - The second Circle object.
* @return {boolean} A value of true if the specified object intersects with this Circle object; otherwise false.
*/
Phaser.Circle.intersects = function (a, b) {
return (Phaser.Math.distance(a.x, a.y, b.x, b.y) <= (a.radius + b.radius));
};
/**
* Returns a Point object containing the coordinates of a point on the circumference of the Circle based on the given angle.
* @method Phaser.Circle.circumferencePoint
* @param {Phaser.Circle} a - The first Circle object.
* @param {number} angle - The angle in radians (unless asDegrees is true) to return the point from.
* @param {boolean} [asDegrees=false] - Is the given angle in radians (false) or degrees (true)?
* @param {Phaser.Point} [out] - An optional Point object to put the result in to. If none specified a new Point object will be created.
* @return {Phaser.Point} The Point object holding the result.
*/
Phaser.Circle.circumferencePoint = function (a, angle, asDegrees, out) {
if (asDegrees === undefined) { asDegrees = false; }
if (out === undefined) { out = new Phaser.Point(); }
if (asDegrees === true)
{
angle = Phaser.Math.degToRad(angle);
}
out.x = a.x + a.radius * Math.cos(angle);
out.y = a.y + a.radius * Math.sin(angle);
return out;
};
/**
* Checks if the given Circle and Rectangle objects intersect.
* @method Phaser.Circle.intersectsRectangle
* @param {Phaser.Circle} c - The Circle object to test.
* @param {Phaser.Rectangle} r - The Rectangle object to test.
* @return {boolean} True if the two objects intersect, otherwise false.
*/
Phaser.Circle.intersectsRectangle = function (c, r) {
var cx = Math.abs(c.x - r.x - r.halfWidth);
var xDist = r.halfWidth + c.radius;
if (cx > xDist)
{
return false;
}
var cy = Math.abs(c.y - r.y - r.halfHeight);
var yDist = r.halfHeight + c.radius;
if (cy > yDist)
{
return false;
}
if (cx <= r.halfWidth || cy <= r.halfHeight)
{
return true;
}
var xCornerDist = cx - r.halfWidth;
var yCornerDist = cy - r.halfHeight;
var xCornerDistSq = xCornerDist * xCornerDist;
var yCornerDistSq = yCornerDist * yCornerDist;
var maxCornerDistSq = c.radius * c.radius;
return xCornerDistSq + yCornerDistSq <= maxCornerDistSq;
};
// Because PIXI uses its own Circle, we'll replace it with ours to avoid duplicating code or confusion.
PIXI.Circle = Phaser.Circle;
/**
* @author Richard Davey <rich@photonstorm.com>
* @author Chad Engler <chad@pantherdev.com>
* @copyright 2016 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
/**
* Creates a Ellipse object. A curve on a plane surrounding two focal points.
*
* @class Phaser.Ellipse
* @constructor
* @param {number} [x=0] - The X coordinate of the upper-left corner of the framing rectangle of this ellipse.
* @param {number} [y=0] - The Y coordinate of the upper-left corner of the framing rectangle of this ellipse.
* @param {number} [width=0] - The overall width of this ellipse.
* @param {number} [height=0] - The overall height of this ellipse.
*/
Phaser.Ellipse = function (x, y, width, height) {
x = x || 0;
y = y || 0;
width = width || 0;
height = height || 0;
/**
* @property {number} x - The X coordinate of the upper-left corner of the framing rectangle of this ellipse.
*/
this.x = x;
/**
* @property {number} y - The Y coordinate of the upper-left corner of the framing rectangle of this ellipse.
*/
this.y = y;
/**
* @property {number} width - The overall width of this ellipse.
*/
this.width = width;
/**
* @property {number} height - The overall height of this ellipse.
*/
this.height = height;
/**
* @property {number} type - The const type of this object.
* @readonly
*/
this.type = Phaser.ELLIPSE;
};
Phaser.Ellipse.prototype = {
/**
* Sets the members of the Ellipse to the specified values.
* @method Phaser.Ellipse#setTo
* @param {number} x - The X coordinate of the upper-left corner of the framing rectangle of this ellipse.
* @param {number} y - The Y coordinate of the upper-left corner of the framing rectangle of this ellipse.
* @param {number} width - The overall width of this ellipse.
* @param {number} height - The overall height of this ellipse.
* @return {Phaser.Ellipse} This Ellipse object.
*/
setTo: function (x, y, width, height) {
this.x = x;
this.y = y;
this.width = width;
this.height = height;
return this;
},
/**
* Returns the framing rectangle of the ellipse as a Phaser.Rectangle object.
*
* @method Phaser.Ellipse#getBounds
* @return {Phaser.Rectangle} The bounds of the Ellipse.
*/
getBounds: function () {
return new Phaser.Rectangle(this.x - this.width, this.y - this.height, this.width, this.height);
},
/**
* Copies the x, y, width and height properties from any given object to this Ellipse.
*
* @method Phaser.Ellipse#copyFrom
* @param {any} source - The object to copy from.
* @return {Phaser.Ellipse} This Ellipse object.
*/
copyFrom: function (source) {
return this.setTo(source.x, source.y, source.width, source.height);
},
/**
* Copies the x, y, width and height properties from this Ellipse to any given object.
* @method Phaser.Ellipse#copyTo
* @param {any} dest - The object to copy to.
* @return {object} This dest object.
*/
copyTo: function(dest) {
dest.x = this.x;
dest.y = this.y;
dest.width = this.width;
dest.height = this.height;
return dest;
},
/**
* Returns a new Ellipse object with the same values for the x, y, width, and height properties as this Ellipse object.
* @method Phaser.Ellipse#clone
* @param {Phaser.Ellipse} output - Optional Ellipse object. If given the values will be set into the object, otherwise a brand new Ellipse object will be created and returned.
* @return {Phaser.Ellipse} The cloned Ellipse object.
*/
clone: function(output) {
if (output === undefined || output === null)
{
output = new Phaser.Ellipse(this.x, this.y, this.width, this.height);
}
else
{
output.setTo(this.x, this.y, this.width, this.height);
}
return output;
},
/**
* Return true if the given x/y coordinates are within this Ellipse object.
*
* @method Phaser.Ellipse#contains
* @param {number} x - The X value of the coordinate to test.
* @param {number} y - The Y value of the coordinate to test.
* @return {boolean} True if the coordinates are within this ellipse, otherwise false.
*/
contains: function (x, y) {
return Phaser.Ellipse.contains(this, x, y);
},
/**
* Returns a uniformly distributed random point from anywhere within this Ellipse.
*
* @method Phaser.Ellipse#random
* @param {Phaser.Point|object} [out] - A Phaser.Point, or any object with public x/y properties, that the values will be set in.
* If no object is provided a new Phaser.Point object will be created. In high performance areas avoid this by re-using an existing object.
* @return {Phaser.Point} An object containing the random point in its `x` and `y` properties.
*/
random: function (out) {
if (out === undefined) { out = new Phaser.Point(); }
var p = Math.random() * Math.PI * 2;
var r = Math.random();
out.x = Math.sqrt(r) * Math.cos(p);
out.y = Math.sqrt(r) * Math.sin(p);
out.x = this.x + (out.x * this.width / 2.0);
out.y = this.y + (out.y * this.height / 2.0);
return out;
},
/**
* Returns a string representation of this object.
* @method Phaser.Ellipse#toString
* @return {string} A string representation of the instance.
*/
toString: function () {
return "[{Phaser.Ellipse (x=" + this.x + " y=" + this.y + " width=" + this.width + " height=" + this.height + ")}]";
}
};
Phaser.Ellipse.prototype.constructor = Phaser.Ellipse;
/**
* The left coordinate of the Ellipse. The same as the X coordinate.
* @name Phaser.Ellipse#left
* @propety {number} left - Gets or sets the value of the leftmost point of the ellipse.
*/
Object.defineProperty(Phaser.Ellipse.prototype, "left", {
get: function () {
return this.x;
},
set: function (value) {
this.x = value;
}
});
/**
* The x coordinate of the rightmost point of the Ellipse. Changing the right property of an Ellipse object has no effect on the x property, but does adjust the width.
* @name Phaser.Ellipse#right
* @property {number} right - Gets or sets the value of the rightmost point of the ellipse.
*/
Object.defineProperty(Phaser.Ellipse.prototype, "right", {
get: function () {
return this.x + this.width;
},
set: function (value) {
if (value < this.x)
{
this.width = 0;
}
else
{
this.width = value - this.x;
}
}
});
/**
* The top of the Ellipse. The same as its y property.
* @name Phaser.Ellipse#top
* @property {number} top - Gets or sets the top of the ellipse.
*/
Object.defineProperty(Phaser.Ellipse.prototype, "top", {
get: function () {
return this.y;
},
set: function (value) {
this.y = value;
}
});
/**
* The sum of the y and height properties. Changing the bottom property of an Ellipse doesn't adjust the y property, but does change the height.
* @name Phaser.Ellipse#bottom
* @property {number} bottom - Gets or sets the bottom of the ellipse.
*/
Object.defineProperty(Phaser.Ellipse.prototype, "bottom", {
get: function () {
return this.y + this.height;
},
set: function (value) {
if (value < this.y)
{
this.height = 0;
}
else
{
this.height = value - this.y;
}
}
});
/**
* Determines whether or not this Ellipse object is empty. Will return a value of true if the Ellipse objects dimensions are less than or equal to 0; otherwise false.
* If set to true it will reset all of the Ellipse objects properties to 0. An Ellipse object is empty if its width or height is less than or equal to 0.
* @name Phaser.Ellipse#empty
* @property {boolean} empty - Gets or sets the empty state of the ellipse.
*/
Object.defineProperty(Phaser.Ellipse.prototype, "empty", {
get: function () {
return (this.width === 0 || this.height === 0);
},
set: function (value) {
if (value === true)
{
this.setTo(0, 0, 0, 0);
}
}
});
/**
* Return true if the given x/y coordinates are within the Ellipse object.
*
* @method Phaser.Ellipse.contains
* @param {Phaser.Ellipse} a - The Ellipse to be checked.
* @param {number} x - The X value of the coordinate to test.
* @param {number} y - The Y value of the coordinate to test.
* @return {boolean} True if the coordinates are within this ellipse, otherwise false.
*/
Phaser.Ellipse.contains = function (a, x, y) {
if (a.width <= 0 || a.height <= 0) {
return false;
}
// Normalize the coords to an ellipse with center 0,0 and a radius of 0.5
var normx = ((x - a.x) / a.width) - 0.5;
var normy = ((y - a.y) / a.height) - 0.5;
normx *= normx;
normy *= normy;
return (normx + normy < 0.25);
};
// Because PIXI uses its own Ellipse, we'll replace it with ours to avoid duplicating code or confusion.
PIXI.Ellipse = Phaser.Ellipse;
/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2016 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
/**
* Creates a new Line object with a start and an end point.
*
* @class Phaser.Line
* @constructor
* @param {number} [x1=0] - The x coordinate of the start of the line.
* @param {number} [y1=0] - The y coordinate of the start of the line.
* @param {number} [x2=0] - The x coordinate of the end of the line.
* @param {number} [y2=0] - The y coordinate of the end of the line.
*/
Phaser.Line = function (x1, y1, x2, y2) {
x1 = x1 || 0;
y1 = y1 || 0;
x2 = x2 || 0;
y2 = y2 || 0;
/**
* @property {Phaser.Point} start - The start point of the line.
*/
this.start = new Phaser.Point(x1, y1);
/**
* @property {Phaser.Point} end - The end point of the line.
*/
this.end = new Phaser.Point(x2, y2);
/**
* @property {number} type - The const type of this object.
* @readonly
*/
this.type = Phaser.LINE;
};
Phaser.Line.prototype = {
/**
* Sets the components of the Line to the specified values.
*
* @method Phaser.Line#setTo
* @param {number} [x1=0] - The x coordinate of the start of the line.
* @param {number} [y1=0] - The y coordinate of the start of the line.
* @param {number} [x2=0] - The x coordinate of the end of the line.
* @param {number} [y2=0] - The y coordinate of the end of the line.
* @return {Phaser.Line} This line object
*/
setTo: function (x1, y1, x2, y2) {
this.start.setTo(x1, y1);
this.end.setTo(x2, y2);
return this;
},
/**
* Sets the line to match the x/y coordinates of the two given sprites.
* Can optionally be calculated from their center coordinates.
*
* @method Phaser.Line#fromSprite
* @param {Phaser.Sprite} startSprite - The coordinates of this Sprite will be set to the Line.start point.
* @param {Phaser.Sprite} endSprite - The coordinates of this Sprite will be set to the Line.start point.
* @param {boolean} [useCenter=false] - If true it will use startSprite.center.x, if false startSprite.x. Note that Sprites don't have a center property by default, so only enable if you've over-ridden your Sprite with a custom class.
* @return {Phaser.Line} This line object
*/
fromSprite: function (startSprite, endSprite, useCenter) {
if (useCenter === undefined) { useCenter = false; }
if (useCenter)
{
return this.setTo(startSprite.center.x, startSprite.center.y, endSprite.center.x, endSprite.center.y);
}
return this.setTo(startSprite.x, startSprite.y, endSprite.x, endSprite.y);
},
/**
* Sets this line to start at the given `x` and `y` coordinates and for the segment to extend at `angle` for the given `length`.
*
* @method Phaser.Line#fromAngle
* @param {number} x - The x coordinate of the start of the line.
* @param {number} y - The y coordinate of the start of the line.
* @param {number} angle - The angle of the line in radians.
* @param {number} length - The length of the line in pixels.
* @return {Phaser.Line} This line object
*/
fromAngle: function (x, y, angle, length) {
this.start.setTo(x, y);
this.end.setTo(x + (Math.cos(angle) * length), y + (Math.sin(angle) * length));
return this;
},
/**
* Rotates the line by the amount specified in `angle`.
*
* Rotation takes place from the center of the line.
* If you wish to rotate around a different point see Line.rotateAround.
*
* If you wish to rotate the ends of the Line then see Line.start.rotate or Line.end.rotate.
*
* @method Phaser.Line#rotate
* @param {number} angle - The angle in radians (unless asDegrees is true) to rotate the line by.
* @param {boolean} [asDegrees=false] - Is the given angle in radians (false) or degrees (true)?
* @return {Phaser.Line} This line object
*/
rotate: function (angle, asDegrees) {
var cx = (this.start.x + this.end.x) / 2;
var cy = (this.start.y + this.end.y) / 2;
this.start.rotate(cx, cy, angle, asDegrees);
this.end.rotate(cx, cy, angle, asDegrees);
return this;
},
/**
* Rotates the line by the amount specified in `angle`.
*
* Rotation takes place around the coordinates given.
*
* @method Phaser.Line#rotateAround
* @param {number} x - The x coordinate to offset the rotation from.
* @param {number} y - The y coordinate to offset the rotation from.
* @param {number} angle - The angle in radians (unless asDegrees is true) to rotate the line by.
* @param {boolean} [asDegrees=false] - Is the given angle in radians (false) or degrees (true)?
* @return {Phaser.Line} This line object
*/
rotateAround: function (x, y, angle, asDegrees) {
this.start.rotate(x, y, angle, asDegrees);
this.end.rotate(x, y, angle, asDegrees);
return this;
},
/**
* Checks for intersection between this line and another Line.
* If asSegment is true it will check for segment intersection. If asSegment is false it will check for line intersection.
* Returns the intersection segment of AB and EF as a Point, or null if there is no intersection.
*
* @method Phaser.Line#intersects
* @param {Phaser.Line} line - The line to check against this one.
* @param {boolean} [asSegment=true] - If true it will check for segment intersection, otherwise full line intersection.
* @param {Phaser.Point} [result] - A Point object to store the result in, if not given a new one will be created.
* @return {Phaser.Point} The intersection segment of the two lines as a Point, or null if there is no intersection.
*/
intersects: function (line, asSegment, result) {
return Phaser.Line.intersectsPoints(this.start, this.end, line.start, line.end, asSegment, result);
},
/**
* Returns the reflected angle between two lines.
* This is the outgoing angle based on the angle of this line and the normalAngle of the given line.
*
* @method Phaser.Line#reflect
* @param {Phaser.Line} line - The line to reflect off this line.
* @return {number} The reflected angle in radians.
*/
reflect: function (line) {
return Phaser.Line.reflect(this, line);
},
/**
* Returns a Point object where the x and y values correspond to the center (or midpoint) of the Line segment.
*
* @method Phaser.Line#midPoint
* @param {Phaser.Point} [out] - A Phaser.Point object into which the result will be populated. If not given a new Point object is created.
* @return {Phaser.Point} A Phaser.Point object with the x and y values set to the center of the line segment.
*/
midPoint: function (out) {
if (out === undefined) { out = new Phaser.Point(); }
out.x = (this.start.x + this.end.x) / 2;
out.y = (this.start.y + this.end.y) / 2;
return out;
},
/**
* Centers this Line on the given coordinates.
*
* The line is centered by positioning the start and end points so that the lines midpoint matches
* the coordinates given.
*
* @method Phaser.Line#centerOn
* @param {number} x - The x position to center the line on.
* @param {number} y - The y position to center the line on.
* @return {Phaser.Line} This line object
*/
centerOn: function (x, y) {
var cx = (this.start.x + this.end.x) / 2;
var cy = (this.start.y + this.end.y) / 2;
var tx = x - cx;
var ty = y - cy;
this.start.add(tx, ty);
this.end.add(tx, ty);
},
/**
* Tests if the given coordinates fall on this line. See pointOnSegment to test against just the line segment.
*
* @method Phaser.Line#pointOnLine
* @param {number} x - The line to check against this one.
* @param {number} y - The line to check against this one.
* @return {boolean} True if the point is on the line, false if not.
*/
pointOnLine: function (x, y) {
return ((x - this.start.x) * (this.end.y - this.start.y) === (this.end.x - this.start.x) * (y - this.start.y));
},
/**
* Tests if the given coordinates fall on this line and within the segment. See pointOnLine to test against just the line.
*
* @method Phaser.Line#pointOnSegment
* @param {number} x - The line to check against this one.
* @param {number} y - The line to check against this one.
* @return {boolean} True if the point is on the line and segment, false if not.
*/
pointOnSegment: function (x, y) {
var xMin = Math.min(this.start.x, this.end.x);
var xMax = Math.max(this.start.x, this.end.x);
var yMin = Math.min(this.start.y, this.end.y);
var yMax = Math.max(this.start.y, this.end.y);
return (this.pointOnLine(x, y) && (x >= xMin && x <= xMax) && (y >= yMin && y <= yMax));
},
/**
* Picks a random point from anywhere on the Line segment and returns it.
*
* @method Phaser.Line#random
* @param {Phaser.Point|object} [out] - A Phaser.Point, or any object with public x/y properties, that the values will be set in.
* If no object is provided a new Phaser.Point object will be created. In high performance areas avoid this by re-using an object.
* @return {Phaser.Point} An object containing the random point in its `x` and `y` properties.
*/
random: function (out) {
if (out === undefined) { out = new Phaser.Point(); }
var t = Math.random();
out.x = this.start.x + t * (this.end.x - this.start.x);
out.y = this.start.y + t * (this.end.y - this.start.y);
return out;
},
/**
* Using Bresenham's line algorithm this will return an array of all coordinates on this line.
* The start and end points are rounded before this runs as the algorithm works on integers.
*
* @method Phaser.Line#coordinatesOnLine
* @param {number} [stepRate=1] - How many steps will we return? 1 = every coordinate on the line, 2 = every other coordinate, etc.
* @param {array} [results] - The array to store the results in. If not provided a new one will be generated.
* @return {array} An array of coordinates.
*/
coordinatesOnLine: function (stepRate, results) {
if (stepRate === undefined) { stepRate = 1; }
if (results === undefined) { results = []; }
var x1 = Math.round(this.start.x);
var y1 = Math.round(this.start.y);
var x2 = Math.round(this.end.x);
var y2 = Math.round(this.end.y);
var dx = Math.abs(x2 - x1);
var dy = Math.abs(y2 - y1);
var sx = (x1 < x2) ? 1 : -1;
var sy = (y1 < y2) ? 1 : -1;
var err = dx - dy;
results.push([x1, y1]);
var i = 1;
while (!((x1 === x2) && (y1 === y2)))
{
var e2 = err << 1;
if (e2 > -dy)
{
err -= dy;
x1 += sx;
}
if (e2 < dx)
{
err += dx;
y1 += sy;
}
if (i % stepRate === 0)
{
results.push([x1, y1]);
}
i++;
}
return results;
},
/**
* Returns a new Line object with the same values for the start and end properties as this Line object.
* @method Phaser.Line#clone
* @param {Phaser.Line} output - Optional Line object. If given the values will be set into the object, otherwise a brand new Line object will be created and returned.
* @return {Phaser.Line} The cloned Line object.
*/
clone: function (output) {
if (output === undefined || output === null)
{
output = new Phaser.Line(this.start.x, this.start.y, this.end.x, this.end.y);
}
else
{
output.setTo(this.start.x, this.start.y, this.end.x, this.end.y);
}
return output;
}
};
/**
* @name Phaser.Line#length
* @property {number} length - Gets the length of the line segment.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "length", {
get: function () {
return Math.sqrt((this.end.x - this.start.x) * (this.end.x - this.start.x) + (this.end.y - this.start.y) * (this.end.y - this.start.y));
}
});
/**
* @name Phaser.Line#angle
* @property {number} angle - Gets the angle of the line in radians.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "angle", {
get: function () {
return Math.atan2(this.end.y - this.start.y, this.end.x - this.start.x);
}
});
/**
* @name Phaser.Line#slope
* @property {number} slope - Gets the slope of the line (y/x).
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "slope", {
get: function () {
return (this.end.y - this.start.y) / (this.end.x - this.start.x);
}
});
/**
* @name Phaser.Line#perpSlope
* @property {number} perpSlope - Gets the perpendicular slope of the line (x/y).
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "perpSlope", {
get: function () {
return -((this.end.x - this.start.x) / (this.end.y - this.start.y));
}
});
/**
* @name Phaser.Line#x
* @property {number} x - Gets the x coordinate of the top left of the bounds around this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "x", {
get: function () {
return Math.min(this.start.x, this.end.x);
}
});
/**
* @name Phaser.Line#y
* @property {number} y - Gets the y coordinate of the top left of the bounds around this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "y", {
get: function () {
return Math.min(this.start.y, this.end.y);
}
});
/**
* @name Phaser.Line#left
* @property {number} left - Gets the left-most point of this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "left", {
get: function () {
return Math.min(this.start.x, this.end.x);
}
});
/**
* @name Phaser.Line#right
* @property {number} right - Gets the right-most point of this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "right", {
get: function () {
return Math.max(this.start.x, this.end.x);
}
});
/**
* @name Phaser.Line#top
* @property {number} top - Gets the top-most point of this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "top", {
get: function () {
return Math.min(this.start.y, this.end.y);
}
});
/**
* @name Phaser.Line#bottom
* @property {number} bottom - Gets the bottom-most point of this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "bottom", {
get: function () {
return Math.max(this.start.y, this.end.y);
}
});
/**
* @name Phaser.Line#width
* @property {number} width - Gets the width of this bounds of this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "width", {
get: function () {
return Math.abs(this.start.x - this.end.x);
}
});
/**
* @name Phaser.Line#height
* @property {number} height - Gets the height of this bounds of this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "height", {
get: function () {
return Math.abs(this.start.y - this.end.y);
}
});
/**
* @name Phaser.Line#normalX
* @property {number} normalX - Gets the x component of the left-hand normal of this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "normalX", {
get: function () {
return Math.cos(this.angle - 1.5707963267948966);
}
});
/**
* @name Phaser.Line#normalY
* @property {number} normalY - Gets the y component of the left-hand normal of this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "normalY", {
get: function () {
return Math.sin(this.angle - 1.5707963267948966);
}
});
/**
* @name Phaser.Line#normalAngle
* @property {number} normalAngle - Gets the angle in radians of the normal of this line (line.angle - 90 degrees.)
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "normalAngle", {
get: function () {
return Phaser.Math.wrap(this.angle - 1.5707963267948966, -Math.PI, Math.PI);
}
});
/**
* Checks for intersection between two lines as defined by the given start and end points.
* If asSegment is true it will check for line segment intersection. If asSegment is false it will check for line intersection.
* Returns the intersection segment of AB and EF as a Point, or null if there is no intersection.
* Adapted from code by Keith Hair
*
* @method Phaser.Line.intersectsPoints
* @param {Phaser.Point} a - The start of the first Line to be checked.
* @param {Phaser.Point} b - The end of the first line to be checked.
* @param {Phaser.Point} e - The start of the second Line to be checked.
* @param {Phaser.Point} f - The end of the second line to be checked.
* @param {boolean} [asSegment=true] - If true it will check for segment intersection, otherwise full line intersection.
* @param {Phaser.Point|object} [result] - A Point object to store the result in, if not given a new one will be created.
* @return {Phaser.Point} The intersection segment of the two lines as a Point, or null if there is no intersection.
*/
Phaser.Line.intersectsPoints = function (a, b, e, f, asSegment, result) {
if (asSegment === undefined) { asSegment = true; }
if (result === undefined) { result = new Phaser.Point(); }
var a1 = b.y - a.y;
var a2 = f.y - e.y;
var b1 = a.x - b.x;
var b2 = e.x - f.x;
var c1 = (b.x * a.y) - (a.x * b.y);
var c2 = (f.x * e.y) - (e.x * f.y);
var denom = (a1 * b2) - (a2 * b1);
if (denom === 0)
{
return null;
}
result.x = ((b1 * c2) - (b2 * c1)) / denom;
result.y = ((a2 * c1) - (a1 * c2)) / denom;
if (asSegment)
{
var uc = ((f.y - e.y) * (b.x - a.x) - (f.x - e.x) * (b.y - a.y));
var ua = (((f.x - e.x) * (a.y - e.y)) - (f.y - e.y) * (a.x - e.x)) / uc;
var ub = (((b.x - a.x) * (a.y - e.y)) - ((b.y - a.y) * (a.x - e.x))) / uc;
if (ua >= 0 && ua <= 1 && ub >= 0 && ub <= 1)
{
return result;
}
else
{
return null;
}
}
return result;
};
/**
* Checks for intersection between two lines.
* If asSegment is true it will check for segment intersection.
* If asSegment is false it will check for line intersection.
* Returns the intersection segment of AB and EF as a Point, or null if there is no intersection.
* Adapted from code by Keith Hair
*
* @method Phaser.Line.intersects
* @param {Phaser.Line} a - The first Line to be checked.
* @param {Phaser.Line} b - The second Line to be checked.
* @param {boolean} [asSegment=true] - If true it will check for segment intersection, otherwise full line intersection.
* @param {Phaser.Point} [result] - A Point object to store the result in, if not given a new one will be created.
* @return {Phaser.Point} The intersection segment of the two lines as a Point, or null if there is no intersection.
*/
Phaser.Line.intersects = function (a, b, asSegment, result) {
return Phaser.Line.intersectsPoints(a.start, a.end, b.start, b.end, asSegment, result);
};
/**
* Checks for intersection between the Line and a Rectangle shape, or a rectangle-like
* object, with public `x`, `y`, `right` and `bottom` properties, such as a Sprite or Body.
*
* An intersection is considered valid if:
*
* The line starts within, or ends within, the Rectangle.
* The line segment intersects one of the 4 rectangle edges.
*
* The for the purposes of this function rectangles are considered 'solid'.
*
* @method Phaser.Line.intersectsRectangle
* @param {Phaser.Line} line - The line to check for intersection with.
* @param {Phaser.Rectangle|object} rect - The rectangle, or rectangle-like object, to check for intersection with.
* @return {boolean} True if the line intersects with the rectangle edges, or starts or ends within the rectangle.
*/
Phaser.Line.intersectsRectangle = function (line, rect) {
// Quick bail out of the Line and Rect bounds don't intersect
if (!Phaser.Rectangle.intersects(line, rect))
{
return false;
}
var x1 = line.start.x;
var y1 = line.start.y;
var x2 = line.end.x;
var y2 = line.end.y;
var bx1 = rect.x;
var by1 = rect.y;
var bx2 = rect.right;
var by2 = rect.bottom;
var t = 0;
// If the start or end of the line is inside the rect then we assume
// collision, as rects are solid for our use-case.
if ((x1 >= bx1 && x1 <= bx2 && y1 >= by1 && y1 <= by2) ||
(x2 >= bx1 && x2 <= bx2 && y2 >= by1 && y2 <= by2))
{
return true;
}
if (x1 < bx1 && x2 >= bx1)
{
// Left edge
t = y1 + (y2 - y1) * (bx1 - x1) / (x2 - x1);
if (t > by1 && t <= by2)
{
return true;
}
}
else if (x1 > bx2 && x2 <= bx2)
{
// Right edge
t = y1 + (y2 - y1) * (bx2 - x1) / (x2 - x1);
if (t >= by1 && t <= by2)
{
return true;
}
}
if (y1 < by1 && y2 >= by1)
{
// Top edge
t = x1 + (x2 - x1) * (by1 - y1) / (y2 - y1);
if (t >= bx1 && t <= bx2)
{
return true;
}
}
else if (y1 > by2 && y2 <= by2)
{
// Bottom edge
t = x1 + (x2 - x1) * (by2 - y1) / (y2 - y1);
if (t >= bx1 && t <= bx2)
{
return true;
}
}
return false;
};
/**
* Returns the reflected angle between two lines.
* This is the outgoing angle based on the angle of Line 1 and the normalAngle of Line 2.
*
* @method Phaser.Line.reflect
* @param {Phaser.Line} a - The base line.
* @param {Phaser.Line} b - The line to be reflected from the base line.
* @return {numbe