Graphics 类画图方法.doc

1. lineStyle()方法详解说明：该方法用来定义线条的样式，详细调用如下：public function lineStyle(thickness:Number = NaN,color:uint = 0,alpha:Number = 1.0,pixelHinting:Boolean= false,scaleMode:String = “normal”,caps:String = null,joints:String = null,miterLimit:Number = 3):voidthickness(线条宽度)定义线条的宽度，以px为单位。color(线条颜色)定义线条的颜色，默认为黑色。alpha(透明度)定义线条的透明度，默认为1，0.5为半透明。pixelHinting(用于指定是否提示笔触采用完整像素的布尔值)默认为false，一般情况下为默认值就OK。scaleMode(缩放模式)值为flash.display.LineScaleMode的一个枚举值，该枚举包含NORMAL(总是缩放粗细)、NONE(从不缩放粗细)、VERTICAL(如果仅垂直缩放对象，则不缩放线条粗细)、HORIZONTAL(如果仅水平缩放对象，则不缩放线条粗细)。默认值为NORMAL。LineScaleMode.VERTICAL图示：LineScaleMode.HORIZONTAL图示：caps(用于指定线条末端类型)值为flash.display.LineScaleMode的一个枚举值，包含CapsStyle.NONE、CapsStyle.ROUND 和 CapsStyle.SQUARE。默认为CapsStyle.ROUND(圆头端点)。joints(用于指定线条拐角类型)JointStyle 类的值，指定用于拐角的连接外观的类型。有效值为：JointStyle.BEVEL、JointStyle.MITER 和 JointStyle.ROUND(默认值)miterLimit(指定斜接限制)值越大，越接近锐利的尖角，默认值为3。只有当joints的值为MITER才有效，可以通过设置该值实现BEVEL的效果。2. lineGradientStyle()方法详解说明：该方法用来定义线条渐变的样式public function lineGradientStyle(type:String,colors:Array,alphas:Array,ratios:Array,matrix:Matrix = null,spreadMethod:String = “pad”,interpolationMethod:String = “rgb”,focalPointRatio:Number = 0):voidtype(渐变类型)用于指定要使用哪种渐变类型的GradientType类的值：GradientType.LINEAR(线性) 或 GradientType.RADIAL(放射)colors(渐变颜色数组)要在渐变中使用的RGB十六进制颜色值数组。(如0x000000,0xFFFFFF)alphas(alpha值数组)colors数组中对应颜色的alpha值数组；有效值为 0 到 1。如果值小于0，则默认值为0。如果值大于1，则默认值为1matrix(转换矩阵)一个由flash.geom.Matrix 类定义的转换矩阵。flash.geom.Matrix类包括createGradientBox()方法，通过该方法可以方便地设置矩阵，以便与 lineGradientStyle() 方法一起使用spreadMethod(散布方式)用于指定要使用哪种散布方式的SpreadMethod类的值：SpreadMethod.PAD,SpreadMethod.REFLECT，SpreadMethod.REPEAT。貌似只在Radial渐变下有效interpolationMethod(插值方法)用于指定要使用哪种插值方法的InterpolationMethod类的值：InterpolationMethod.LINEAR_RGB，InterpolationMethod.RGB。感觉LINEAR_RGB效果比较平滑focalPointRatio(渐变焦点位置)一个控制渐变的焦点位置的数字。值0表示焦点位于中心。值1表示焦点位于渐变圆的一条边界上。值-1表示焦点位于渐变圆的另一条边界上。小于-1或大于1的值将舍入为-1或1一些重要的概念：* 如果设置lineGradientStyle，那么lineStyle()里的颜色设置将不再生效。* 对于数组值，如果数量不匹配，就是某些值多了或少了，那么就会引起会静默失败没有渐变，没有填充，没有错误信息。* 使用Math.PI/2旋转90度形成一个垂直填充。-Math.PI/2形成向上填充，而Math.PI则是从右向左填充，默认为从左向右填充。* ratios(分布比率数组)主要代表了渐变的快慢程度，假如有3个颜色，0,20,255，则第一个到第二个很快，第二个到第三个会很漫长。* 如果是一个非水平线的线条要实现渐变，则必须先定义一个外切于该线条的转换矩阵，然后依据线条的角度来设置矩阵的渐变角度，例如box.createGradientBox(100,30,Math.PI/4,100,100);设置渐变的一般步骤：1. 定义lineStyle来设置线条的粗细2. 定义一个转换矩阵，并设置矩阵与将要应用渐变的线条一样大小。例如：var box:Matrix = new Matrix(); box.createGradientBox(200,30,0,100,100);3. 定义lineGradientStyle，将设置好的Matrix(转换矩阵)作为参数传递。4. 绘制线条。例子：1. 一个很正规的线性渐变view plaincopy to clipboardprint?var box:Matrix = new Matrix();box.createGradientBox(100,30,0,100,100);var line:Shape = new Shape();line.graphics.lineStyle(30,0xFFFF00,1,false,LineScaleMode.NONE,CapsStyle.NONE);line.graphics.lineGradientStyle(GradientType.LINEAR,0x000000,0xFFFFFF,1,1,0,255,box,SpreadMethod.PAD,InterpolationMethod.LINEAR_RGB);line.graphics.moveTo(100,100);line.graphics.lineTo(200,100);this.addChild(line);var box:Matrix = new Matrix();box.createGradientBox(100,30,0,100,100);var line:Shape = new Shape();line.graphics.lineStyle(30,0xFFFF00,1,false,LineScaleMode.NONE,CapsStyle.NONE);line.graphics.lineGradientStyle(GradientType.LINEAR,0x000000,0xFFFFFF,1,1,0,255,box,SpreadMethod.PAD,InterpolationMethod.LINEAR_RGB);line.graphics.moveTo(100,100);line.graphics.lineTo(200,100);this.addChild(line);2. 一个斜线的线性渐变(45与90)view plaincopy to clipboardprint?var box:Matrix = new Matrix();/90垂直渐变/box.createGradientBox(30,100,Math.PI/2,100,100);/45渐变box.createGradientBox(137,137,Math.PI/4,82,82);var line:Shape = new Shape();line.graphics.lineStyle(30,0xFFFF00,1,false,LineScaleMode.NONE,CapsStyle.NONE);line.graphics.lineGradientStyle(GradientType.LINEAR,0x000000,0xFFFFFF,1,1,0,255,box,SpreadMethod.PAD,InterpolationMethod.LINEAR_RGB);/90垂直渐变/line.graphics.moveTo(100,100);/line.graphics.lineTo(100,200);/45垂直渐变line.graphics.moveTo(100,100);line.graphics.lineTo(200,200);this.addChild(line);var box:Matrix = new Matrix();/90垂直渐变/box.createGradientBox(30,100,Math.PI/2,100,100);/45渐变box.createGradientBox(137,137,Math.PI/4,82,82);var line:Shape = new Shape();line.graphics.lineStyle(30,0xFFFF00,1,false,LineScaleMode.NONE,CapsStyle.NONE);line.graphics.lineGradientStyle(GradientType.LINEAR,0x000000,0xFFFFFF,1,1,0,255,box,SpreadMethod.PAD,InterpolationMethod.LINEAR_RGB);/90垂直渐变/line.graphics.moveTo(100,100);/line.graphics.lineTo(100,200);/45垂直渐变line.graphics.moveTo(100,100);line.graphics.lineTo(200,200);this.addChild(line);3. 一个放射性渐变view plaincopy to clipboardprint?var line:Shape = new Shape();line.graphics.lineStyle(100,0000000,1,false,LineScaleMode.NONE,CapsStyle.NONE);var box:Matrix = new Matrix();box.createGradientBox(30,30,0,130,85);line.graphics.lineGradientStyle(GradientType.RADIAL,0xFFFF00,0xFF0000,1,1,0,255,box,SpreadMethod.PAD,InterpolationMethod.LINEAR_RGB,-0.5);line.graphics.moveTo(100,100);line.graphics.lineTo(200,100);this.addChild(line);var line:Shape = new Shape();line.graphics.lineStyle(100,0000000,1,false,LineScaleMode.NONE,CapsStyle.NONE);var box:Matrix = new Matrix();box.createGradientBox(30,30,0,130,85);line.graphics.lineGradientStyle(GradientType.RADIAL,0xFFFF00,0xFF0000,1,1,0,255,box,SpreadMethod.PAD,InterpolationMethod.LINEAR_RGB,-0.5);line.graphics.moveTo(100,100);line.graphics.lineTo(200,100);this.addChild(line);3. 画虚线解决方法：ASCB Library下有一个Pen类,利用drawLine(nX0:Number, nY0:Number, nX1:Number, nY1:Number)方法画出一系列的直线，使其看起来像是虚线。其中nX0、nY0对应的是moveTo(x,y)，nX1、nY1对应的是lineTo(x,y)。Example:view plaincopy to clipboardprint?package import ascb.drawing.Pen;import flash.display.Sprite;public class Sample0310 extends Spritepublic function Sample0310()var sprite:Sprite = new Sprite();var pen:Pen = new Pen(sprite.graphics);pen.drawLine(0, 20, 10, 20);pen.drawLine(15, 20, 25, 20);pen.drawLine(30, 20, 40, 20);pen.drawLine(45, 20, 55, 20);this.addChild(sprite);package import ascb.drawing.Pen;import flash.display.Sprite;public class Sample0310 extends Spritepublic function Sample0310()var sprite:Sprite = new Sprite();var pen:Pen = new Pen(sprite.graphics);pen.drawLine(0, 20, 10, 20);pen.drawLine(15, 20, 25, 20);pen.drawLine(30, 20, 40, 20);pen.drawLine(45, 20, 55, 20);this.addChild(sprite);4. 画曲线解决方法：public function curveTo(controlX:Number, controlY:Number, anchorX:Number, anchorY:Number):void先定义绘画点(moveTo),再定义目标点(anchorX, anchorY),最后定义控制点(controlX,controlY)。可以用beginFill()方法定义曲线的填充。绘制的曲线是二次贝塞尔曲线。二次贝塞尔曲线包含两个锚点和一个控制点。该曲线内插这两个锚点，并向控制点弯曲。Example:view plaincopy to clipboardprint?package import flash.display.Shape;import flash.display.Sprite;public class Sample0310 extends Spritepublic function Sample0310()var moon:Shape = new Shape();moon.graphics.lineStyle(1);moon.graphics.beginFill(0xFFFF00,1);moon.graphics.moveTo(100,100);moon.graphics.curveTo(20,150,100,200);moon.graphics.curveTo(60,150,100,100);moon.graphics.endFill();this.addChild(moon);package import flash.display.Shape;import flash.display.Sprite;public class Sample0310 extends Spritepublic function Sample0310()var moon:Shape = new Shape();moon.graphics.lineStyle(1);moon.graphics.beginFill(0xFFFF00,1);moon.graphics.moveTo(100,100);moon.graphics.curveTo(20,150,100,200);moon.graphics.curveTo(60,150,100,100);moon.graphics.endFill();this.addChild(moon);5. 画扇形解决方法：使用ascb的Pen.drawArc(x,y,radius,arc,startingAngle,radialLines)参数说明：x 扇形中心的x坐标(圆的中心)y 扇形中心的y坐标radius 扇形半径arc 扇形度数，指定为角度startingAngle 扇形开始角度，默认为0(以平行方向为基准，在3点钟的位置为0度)radialLines 布尔值，指示是否画出扇形两端点到中心的直线，默认为falseExample:view plaincopy to clipboardprint?package import ascb.drawing.Pen;import flash.display.Sprite;public class Sample0310 extends Spritepublic function Sample0310()var sprite:Sprite = new Sprite();sprite.graphics.beginFill(0xFFFF00);var pen:Pen = new Pen(sprite.graphics);pen.drawArc(100, 100, 50, 90, 10, true);this.addChild(sprite);package import ascb.drawing.Pen;import flash.display.Sprite;public class Sample0310 extends Spritepublic function Sample0310()var sprite:Sprite = new Sprite();sprite.graphics.beginFill(0xFFFF00);var pen:Pen = new Pen(sprite.graphics);pen.drawArc(100, 100, 50, 90, 10, true);this.addChild(sprite);6. 画矩形解决方法：有三种方式画矩形，分别是drawRect(),drawRoundRect(),drawRoundRectComplex()drawRect(x,y,width,height)用于画标准的矩形drawRoundRect(x,y,width,height,ellipseWidth,ellipseHeight)用于画圆角矩形，其中ellipseWidth和ellipseHeight代表绘制圆角的椭圆的宽度和高度。一般不指定ellipseHeight，它默认与ellipseWidth的值相同drawRoundRectComplex(x,y,width,height,topLeftRadius,topRightRadius,bottomLeftRadius,bottomRightRadius)用于画四个角各不相同的圆角矩形，其中topLeftRadius,topRightRadius,bottomLeftRadius,bottomRightRadius分别代表左上角、右上角、左下角、右下脚的半径Example:view plaincopy to clipboardprint?package import flash.display.Sprite;public class Sample0310 extends Spritepublic function Sample0310()var sprite:Sprite = new Sprite();sprite.graphics.lineStyle(2);sprite.graphics.beginFill(0xFFFF00);sprite.graphics.drawRect(50,50,100,100);sprite.graphics.drawRoundRect(200,50,100,100,10,10);sprite.graphics.drawRoundRectComplex(350,50,100,100,10,15,20,25);this.addChild(sprite);package import flash.display.Sprite;public class Sample0310 extends Spritepublic function Sample0310()var sprite:Sprite = new Sprite();sprite.graphics.lineStyle(2);sprite.graphics.beginFill(0xFFFF00);sprite.graphics.drawRect(50,50,100,100);sprite.graphics.drawRoundRect(200,50,100,100,10,10);sprite.graphics.drawRoundRectComplex(350,50,100,100,10,15,20,25);this.addChild(sprite);7. 画椭圆解决方法：使用drawEllipse(x,y,xRadius,yRadius)画出椭圆。x 椭圆中心的x坐标y 椭圆中心的y坐标xRadius 椭圆x方向的半径yRadius 椭圆y方向的半径Example:view plaincopy to clipboardprint?package import flash.display.Sprite;public class Sample0310 extends Spritepublic function Sample0310()var sprite:Sprite = new Sprite();sprite.graphics.lineStyle(2);sprite.graphics.beginFill(0xFFFF00);sprite.graphics.drawEllipse(100,100,100,50);this.addChild(sprite);package import flash.display.Sprite;public class Sample0310 extends Spritepublic function Sample0310()var sprite:Sprite = new Sprite();sprite.graphics.lineStyle(2);sprite.graphics.beginFill(0xFFFF00);sprite.graphics.drawEllipse(100,100,100,50);this.addChild(sprite);8. 画三角形解决方法：使用ascb的Pen.drawTriangle(x,y,ab,ac,angle,rotation)参数说明：x 夹角点的x坐标y 夹角点的y坐标ab 一条边的长度ac 另一条边的长度angle 两条边的夹角rotation 三角形的旋转角度，默认为0(以平行方向为基准，在3点钟的位置为0度)一般步骤：1. 先确定一个点(x,y)2. 从这个点开始定义两条边(ab,ac)3. 确定这两条边的夹角4. 调整三角形的整体旋转角度Example:view plaincopy to clipboardprint?package import ascb.drawing.Pen;import flash.display.Sprite;public class Sample0310 extends Spritepublic function Sample0310()var sprite:Sprite = new Sprite();var pen:Pen = new Pen(sprite.graphics);pen.beginFill(0xFF0000);pen.drawTriangle(100,100,70,70,60,-60);pen.endFill( );this.addChild(sprite);package import ascb.drawing.Pen;import flash.display.Sprite;public class Sample0310 extends Spritepublic function Sample0310()var sprite:Sprite = new Sprite();var pen:Pen = new Pen(sprite.graphics);pen.beginFill(0xFF0000);pen.drawTriangle(100,100,70,70,60,-60);pen.endFill( );this.addChild(sprite);9. 画等边多边形解决方法：使用ascb的Pen.drawRegularPolygon(x,y,sides,length,rotation)参数说