NED 文件中

在NED文件中如果涉及到圖的定義，在canvas示例中的代碼如下：

network CarDemo
{
    parameters:
       @display("bgb=800,500");
       @figure[road] (type=polygon; points=100,200, 200,100, 300,50, 500,50, 650,100, 700,200, 600,300, 500,350, 400,350, 200,350, 100,300; smooth=true; lineWidth=60; zoomLineWidth=true; lineColor=grey);
       @figure[paint](type=polygon; points=100,200, 200,100, 300,50, 500,50, 650,100, 700,200, 600,300, 500,350, 400,350, 200,350, 100,300; smooth=true; lineWidth=3; zoomLineWidth=true; lineColor=white; lineStyle=dashed);
       @figure[trail](type=polyline; lineWidth=5; lineOpacity=0.6; lineColor=orange);
       @figure[car](type=image; image="car-top-view"; pos=0,0; anchor=c);
       @figure[car.antenna](type=image; image="antenna"; pos=-10,-40; anchor=nw);
       @figure[car.antenna.beam](type=path; path="M 10 0 L 10 -20 L 1200 -100 L 1200 100 L 10 20 Z"; fillColor=blue; fillOpacity=0.1; lineColor=blue; lineOpacity=0.1);
       @figure[status](type=group; transform=translate(700,20));
       // or, for non-zooming status area: @figure[status](type=panel; pos=700,20);
       @figure[status.bg](type=rectangle; pos=0,0; size=150,100; anchor=n; cornerRadius=10; fillColor=#fafdb9; fillOpacity=0.2; lineColor=#fafdb9; lineOpacity=0.4);
       @figure[status.distanceTitle](type=text; pos=0,20; text="Distance Travelled"; anchor=center);
       @figure[status.distance](type=text; pos=0,40; text="0m"; anchor=center; font=Arial,22);
       @figure[status.headingTitle](type=text; pos=0,70; text="Heading"; anchor=center);
       @figure[status.heading](type=text; pos=0,90; text="0"; anchor=center; font=Arial,22);

    submodules:
       animator: CarAnimator;
}

其中@figure的定義表示一個圖，

在c++中可以引用：

 cCanvas *canvas = getParentModule()->getCanvas();

    canvas->setAnimationSpeed(50.0, this);

    road = check_and_cast<cPolygonFigure *>(canvas->getFigure("road"));
    trail = check_and_cast<cPolylineFigure *>(canvas->getFigure("trail"));
    car = check_and_cast<cImageFigure *>(canvas->getFigure("car"));
    antenna = check_and_cast<cFigure *>(canvas->getFigureByPath("car.antenna"));
    distanceDisplay = check_and_cast<cTextFigure *>(canvas->getFigureByPath("status.distance"));
    headingDisplay = check_and_cast<cTextFigure *>(canvas->getFigureByPath("status.heading"));

其中，@figure的類型有如下幾種：

@fifigure type	C++ class	中文含義
line	cLineFigure	直線
arc	cArcFigure	弧線
polyline	cPolylineFigure	折線
rectangle	cRectangleFigure	矩形
oval	cOvalFigure	橢圓
ring	cRingFigure	圓環
pieslice	cPieSliceFigure	餅圖部分
polygon	cPolygonFigure	多邊形
path	cPathFigure	路徑
text	cTextFigure	路徑
label	cLabelFigure	文本標籤
image	cImageFigure	圖像
icon	cIconFigure	圖標
pixmap	cPixmapFigure	位圖
group	cGroupFigure	組

 

每個圖由一組屬性參數來定義，屬性的類型如下表：

類型	值定義格式	備註
bool	true 或者false.
int	整數
double	實數
double01	在[0,1]之間的實數	比如透明度，不透明度
degrees	表示溫度的實數
string	字符串	如果它包含逗號、分號、右括號或其他影響解析的字符，需要使用引號括起來
Anchor	c, center, n, e, s, w, nw, ne, se, sw, start, middle, or end.	text fifigures只能用後三個
Arrowhead : CapStyle	none, simple, triangle, or barbed. butt, square, or round.	箭頭
Color :	A color in HTML format (#rrggbb), a color in HSB format (@hhssbb), or a valid SVG color name.
Dimensions :	width, height	Size given as width and height.
FigureType :	各種內置圖類型	Register_Figure()
FillRule	evenodd or nonzero.
Font	typeface, size, style	All three items are optional. size is the font size in points. style is space-sparated list of zero or more of the following words: normal, bold, italic, underline.
ImageName :	文件名	The name of an image.
Interpolation	none, fast, or best
JoinStyle	bevel, miter, or round
LineStyle	solid, dotted, or dashed
Point	x, y	一個點
Point2	x1, y1, x2, y2	2個點
PointList	x1, y1, x2, y2, x3, y3...	點列表
Rectangle	x, y, width, height	矩形，左上角，長寬
TagList	tag1, tag2, tag3...
Tint	Color, double01	Specififies tint color and the amount of tinting for images.
Transform	translate(x, y), rotate(deg), rotate(deg, centerx, centery), scale(s), scale(sx, sy), scale(s, centerx, centery), scale(sx, sy, centerx, centery), skewx(coeff), skewx(coeff, centery), skewy(coeff), skewy(coeff, centerx), matrix(a, b, c, d, t1, t2)	一個或者多個轉換組成的步驟列表

由上面表格的各種類型的屬性一起可以定義某個圖。不同的圖包含的屬性不同：

類型：父類	值格式定義	備註
(fifigure) :	type=<FigureType>; visible=<bool>; tags=<TagList>; childZ=<int>;transform=<Transform>;	基類
(abstractLine) : fifigure	lineColor=<Color>; lineStyle=<LineStyle>; lineWidth=<double>; lineOpacity=<double>; capStyle=<CapStyle>; startArrowhead=<Arrowhead>; endArrowhead=<Arrowhead>; zoomLineWidth=<bool>;	抽象類
line : abstractLine	points=<Point2>	直線
arc : abstractLine	bounds=<Rectangle> pos=<Point>; size=<Dimensions>; anchor=<Anchor>; startAngle=<degrees>; endAngle=<degrees>	弧線
polyline : abstractLine	points=<PointList>; smooth=<bool>; joinstyle=<JoinStyle>	折線
(abstractShape) : fifigure	lineColor=<Color>; fillColor=<Color>; lineStyle=<LineStyle>; lineWidth=<double>; lineOpacity=<double01>; fillOpacity=<double01>; zoomLineWidth=<bool>	圖形類
rectangle : abstractShape	bounds=<Rectangle> pos=<Point>; size=<Dimensions>; anchor=<Anchor>; cornerRadius=<double>|<Dimensions>	矩形
oval : abstractShape	bounds=<Rectangle> pos=<Point>; size=<Dimensions>; anchor=<Anchor>	橢圓
ring : abstractShape	bounds=<Rectangle> pos=<Point>; size=<Dimensions>; anchor=<Anchor>; innerSize=<Dimensions>	圓環
pieslice : abstractShape	bounds=<Rectangle> pos=<Point>; size=<Dimensions>; anchor=<Anchor>; startAngle=<degrees>; endAngle=<degrees>	餅圖部分
polygon : abstractShape	points=<PointList>; smooth=<bool>; joinStyle=<JoinStyle>; fillRule=<FillRule>	多邊形
path : abstractShape	path=<string>; offset=<Point>; joinStyle=<JoinStyle>; capStyle=<CapStyle>; fillRule=<FillRule>	路徑
(abstractText) : figure	pos=<Point>; anchor=<Anchor> text=<string>; font=<Font>; opacity=<double01>; color=<Color>;	抽象文字
label : abstractText	angle=<degrees>;	標籤
text : abstractText		文本框
(abstractImage) : figure	bounds=<Rectangle> pos=<Point>; size=<Dimensions>; anchor=<Anchor>; interpolation=<Interpolation>; opacity=<double01>; tint=<Tint>	抽象圖片
image : abstractImage	image=<ImageName>	圖像
icon : abstractImage	image=<ImageName>	圖標
pixmap : abstractImage	resolution=<Dimensions>	位圖