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<h1 class="file-heading">File: src/pixi/primitives/Graphics.js</h1>
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<pre class="code prettyprint linenums">
/**
* @author Mat Groves http://matgroves.com/ @Doormat23
*/
/**
* The Graphics class contains a set of methods that you can use to create primitive shapes and lines.
* It is important to know that with the webGL renderer only simple polys can be filled at this stage
* Complex polys will not be filled. Heres an example of a complex poly: http://www.goodboydigital.com/wp-content/uploads/2013/06/complexPolygon.png
*
* @class Graphics
* @extends DisplayObjectContainer
* @constructor
*/
PIXI.Graphics = function()
{
PIXI.DisplayObjectContainer.call( this );
this.renderable = true;
/**
* The alpha of the fill of this graphics object
*
* @property fillAlpha
* @type Number
*/
this.fillAlpha = 1;
/**
* The width of any lines drawn
*
* @property lineWidth
* @type Number
*/
this.lineWidth = 0;
/**
* The color of any lines drawn
*
* @property lineColor
* @type String
*/
this.lineColor = "black";
/**
* Graphics data
*
* @property graphicsData
* @type Array
* @private
*/
this.graphicsData = [];
/**
* Current path
*
* @property currentPath
* @type Object
* @private
*/
this.currentPath = {points:[]};
}
// constructor
PIXI.Graphics.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
PIXI.Graphics.prototype.constructor = PIXI.Graphics;
/**
* Specifies a line style used for subsequent calls to Graphics methods such as the lineTo() method or the drawCircle() method.
*
* @method lineStyle
* @param lineWidth {Number} width of the line to draw, will update the object's stored style
* @param color {Number} color of the line to draw, will update the object's stored style
* @param alpha {Number} alpha of the line to draw, will update the object's stored style
*/
PIXI.Graphics.prototype.lineStyle = function(lineWidth, color, alpha)
{
if(this.currentPath.points.length == 0)this.graphicsData.pop();
this.lineWidth = lineWidth || 0;
this.lineColor = color || 0;
this.lineAlpha = (alpha == undefined) ? 1 : alpha;
this.currentPath = {lineWidth:this.lineWidth, lineColor:this.lineColor, lineAlpha:this.lineAlpha,
fillColor:this.fillColor, fillAlpha:this.fillAlpha, fill:this.filling, points:[], type:PIXI.Graphics.POLY};
this.graphicsData.push(this.currentPath);
}
/**
* Moves the current drawing position to (x, y).
*
* @method moveTo
* @param x {Number} the X coord to move to
* @param y {Number} the Y coord to move to
*/
PIXI.Graphics.prototype.moveTo = function(x, y)
{
if(this.currentPath.points.length == 0)this.graphicsData.pop();
this.currentPath = this.currentPath = {lineWidth:this.lineWidth, lineColor:this.lineColor, lineAlpha:this.lineAlpha,
fillColor:this.fillColor, fillAlpha:this.fillAlpha, fill:this.filling, points:[], type:PIXI.Graphics.POLY};
this.currentPath.points.push(x, y);
this.graphicsData.push(this.currentPath);
}
/**
* Draws a line using the current line style from the current drawing position to (x, y);
* the current drawing position is then set to (x, y).
*
* @method lineTo
* @param x {Number} the X coord to draw to
* @param y {Number} the Y coord to draw to
*/
PIXI.Graphics.prototype.lineTo = function(x, y)
{
this.currentPath.points.push(x, y);
this.dirty = true;
}
/**
* Specifies a simple one-color fill that subsequent calls to other Graphics methods
* (such as lineTo() or drawCircle()) use when drawing.
*
* @method beginFill
* @param color {uint} the color of the fill
* @param alpha {Number} the alpha
*/
PIXI.Graphics.prototype.beginFill = function(color, alpha)
{
this.filling = true;
this.fillColor = color || 0;
this.fillAlpha = (alpha == undefined) ? 1 : alpha;
}
/**
* Applies a fill to the lines and shapes that were added since the last call to the beginFill() method.
*
* @method endFill
*/
PIXI.Graphics.prototype.endFill = function()
{
this.filling = false;
this.fillColor = null;
this.fillAlpha = 1;
}
/**
* @method drawRect
*
* @param x {Number} The X coord of the top-left of the rectangle
* @param y {Number} The Y coord of the top-left of the rectangle
* @param width {Number} The width of the rectangle
* @param height {Number} The height of the rectangle
*/
PIXI.Graphics.prototype.drawRect = function( x, y, width, height )
{
if(this.currentPath.points.length == 0)this.graphicsData.pop();
this.currentPath = {lineWidth:this.lineWidth, lineColor:this.lineColor, lineAlpha:this.lineAlpha,
fillColor:this.fillColor, fillAlpha:this.fillAlpha, fill:this.filling,
points:[x, y, width, height], type:PIXI.Graphics.RECT};
this.graphicsData.push(this.currentPath);
this.dirty = true;
}
/**
* Draws a circle.
*
* @method drawCircle
* @param x {Number} The X coord of the center of the circle
* @param y {Number} The Y coord of the center of the circle
* @param radius {Number} The radius of the circle
*/
PIXI.Graphics.prototype.drawCircle = function( x, y, radius)
{
if(this.currentPath.points.length == 0)this.graphicsData.pop();
this.currentPath = {lineWidth:this.lineWidth, lineColor:this.lineColor, lineAlpha:this.lineAlpha,
fillColor:this.fillColor, fillAlpha:this.fillAlpha, fill:this.filling,
points:[x, y, radius, radius], type:PIXI.Graphics.CIRC};
this.graphicsData.push(this.currentPath);
this.dirty = true;
}
/**
* Draws an ellipse.
*
* @method drawEllipse
* @param x {Number}
* @param y {Number}
* @param width {Number}
* @param height {Number}
*/
PIXI.Graphics.prototype.drawEllipse = function( x, y, width, height)
{
if(this.currentPath.points.length == 0)this.graphicsData.pop();
this.currentPath = {lineWidth:this.lineWidth, lineColor:this.lineColor, lineAlpha:this.lineAlpha,
fillColor:this.fillColor, fillAlpha:this.fillAlpha, fill:this.filling,
points:[x, y, width, height], type:PIXI.Graphics.ELIP};
this.graphicsData.push(this.currentPath);
this.dirty = true;
}
/**
* Clears the graphics that were drawn to this Graphics object, and resets fill and line style settings.
*
* @method clear
*/
PIXI.Graphics.prototype.clear = function()
{
this.lineWidth = 0;
this.filling = false;
this.dirty = true;
this.clearDirty = true;
this.graphicsData = [];
this.bounds = null//new PIXI.Rectangle();
}
PIXI.Graphics.prototype.updateFilterBounds = function()
{
if(!this.bounds)
{
var minX = Infinity;
var maxX = -Infinity;
var minY = Infinity;
var maxY = -Infinity;
var points, x, y;
for (var i = 0; i < this.graphicsData.length; i++) {
var data = this.graphicsData[i];
var type = data.type;
var lineWidth = data.lineWidth;
points = data.points;
if(type === PIXI.Graphics.RECT)
{
x = points.x - lineWidth/2;
y = points.y - lineWidth/2;
var width = points.width + lineWidth;
var height = points.height + lineWidth;
minX = x < minX ? x : minX;
maxX = x + width > maxX ? x + width : maxX;
minY = y < minY ? x : minY;
maxY = y + height > maxY ? y + height : maxY;
}
else if(type === PIXI.Graphics.CIRC || type === PIXI.Graphics.ELIP)
{
x = points.x;
y = points.y;
var radius = points.radius + lineWidth/2;
minX = x - radius < minX ? x - radius : minX;
maxX = x + radius > maxX ? x + radius : maxX;
minY = y - radius < minY ? y - radius : minY;
maxY = y + radius > maxY ? y + radius : maxY;
}
else
{
// POLY
for (var j = 0; j < points.length; j+=2)
{
x = points[j];
y = points[j+1];
minX = x-lineWidth < minX ? x-lineWidth : minX;
maxX = x+lineWidth > maxX ? x+lineWidth : maxX;
minY = y-lineWidth < minY ? y-lineWidth : minY;
maxY = y+lineWidth > maxY ? y+lineWidth : maxY;
};
}
};
this.bounds = new PIXI.Rectangle(minX, minY, maxX - minX, maxY - minY);
}
// console.log(this.bounds);
}
// SOME TYPES:
PIXI.Graphics.POLY = 0;
PIXI.Graphics.RECT = 1;
PIXI.Graphics.CIRC = 2;
PIXI.Graphics.ELIP = 3;
</pre>
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