omnet++ 之canvas示例 在NED 文件中演示 @figure 用法

在NED文件中如果涉及到图的定义，在canvas示例中的代码如下：

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的定义表示一个图，

在c++中可以引用：

void CarAnimator::initialize() { timeStep = 1; // 步长，步长 * 车速 = 一次移动距离 speed = 2; // 车速 heading = 0; // 车头角度 angularSpeed = 0; // 转向速度 targetPointIndex = 0; // 记录公路数据的索引 distanceTravelled = 0; // 总里程 cCanvas *canvas = getParentModule()->getCanvas(); canvas->setAnimationSpeed(50.0, this); // 取得公路的参数， road = check_and_cast<cPolygonFigure *>(canvas->getFigure("road")); // 拖尾数据，缺少点，需要在运动时候计算 trail = check_and_cast<cPolylineFigure *>(canvas->getFigure("trail")); // 图形，@figure[car](type=image; image="car-top-view"; pos=0,0; anchor=c); car = check_and_cast<cImageFigure *>(canvas->getFigure("car")); // 天线的图形 @figure[car.antenna](type=image; image="antenna"; pos=-10,-40; anchor=nw); antenna = check_and_cast<cFigure *>(canvas->getFigureByPath("car.antenna")); // 右侧显示行驶距离文本 distanceDisplay = check_and_cast<cTextFigure *>(canvas->getFigureByPath("status.distance")); // 右侧显示行驶的车头角度 headingDisplay = check_and_cast<cTextFigure *>(canvas->getFigureByPath("status.heading")); // 获取下一点的数据 loc = road->getPoint(targetPointIndex); // 引擎内部监控各个变量 WATCH(timeStep); WATCH(loc.x); WATCH(loc.y); WATCH(speed); WATCH(heading); WATCH(angularSpeed); WATCH(targetPointIndex); WATCH(distanceTravelled); refresh(); // 设置下次事件 scheduleAt(simTime(), new cMessage()); } void CarAnimator::refresh() const { double t = (simTime() - lastStep) / timeStep; ASSERT(t >= 0); ASSERT(t <= 1); // 车转向 cFigure::Transform carTr; carTr.rotate(heading + angularSpeed * t); // 车移动 double distance = speed * t; carTr.translate(loc.x + distance * cos(heading), loc.y + distance * sin(heading)); car->setTransform(carTr); // 天线转向 cFigure::Transform antTr; antTr.rotate(-2 * simTime().dbl()*M_PI/180); antenna->setTransform(antTr); // 设置状态信息 char buf[20]; sprintf(buf, "%.0fm", distanceTravelled); distanceDisplay->setText(buf); int degrees = -int(heading*180/M_PI); degrees = degrees - 360 * (int)floor(degrees / 360.0); sprintf(buf, "%d\xC2\xB0", degrees); headingDisplay->setText(buf); } void CarAnimator::refreshDisplay() const { // 其实，如果注释了这一句，也能运行，因为每个消息到达时候都进行了一个运动计算。 // 但是，注释后，明显会发生顿挫感，主要是因为：? refresh(); } void CarAnimator::handleMessage(cMessage *msg) { // 一次移动距离 = 步长，步长 * 车速 double distance = speed * timeStep.dbl(); // 根据角度更新当前位置 loc.x += distance * cos(heading); loc.y += distance * sin(heading); // 计算下一个目标的方向 Point target = road->getPoint(targetPointIndex); Point vectorToTarget = target - loc; // 距离小于某个数，则认为到了， if (vectorToTarget.getLength() < 50) // reached targetPointIndex = (targetPointIndex+1) % road->getNumPoints(); double targetDirection = atan2(vectorToTarget.y, vectorToTarget.x); double diff = targetDirection - heading; while (diff < -M_PI) diff += 2*M_PI; while (diff > M_PI) diff -= 2*M_PI; // ，计算车头角度 heading += angularSpeed * timeStep.dbl(); // 以1/30的相差角度作为一次转向速度，转向 angularSpeed = diff / 30; distanceTravelled += distance; refresh(); // tail作为一个队列使用，多了就弹出一个，少了就添加 trail->addPoint(loc); if (trail->getNumPoints() > 500) trail->removePoint(0); lastStep = simTime(); scheduleAt(simTime() + timeStep, msg); }

其中，@figure的类型有如下几种：

@fifigure type

C++ class

中文含义

line

cLineFigure

直线

arc

cArcFigure

弧线

polyline

cPolylineFigure

折线

rectangle

cRectangleFigure

矩形

oval

cOvalFigure

椭圆

ring

cRingFigure

圆环

pieslice

cPieSliceFigure

饼图部分

polygon

cPolygonFigure

多边形

path

cPathFigure

路径

text

cTextFigure

路径

label

cLabelFigure

文本标签

image

cImageFigure

图像

icon

cIconFigure

图标

pixmap

cPixmapFigure

位图

group

cGroupFigure

组

 

每个图由一组属性参数来定义，属性的类型如下表：

类型

值定义格式

备注

bool

true 或者false.

 

int

整数

 

double

实数

 

double01

在[0,1]之间的实数

比如透明度，不透明度

degrees

表示温度的实数

 

string

字符串

如果它包含逗号、分号、右括号或其他影响解析的字符，需要使用引号括起来

Anchor

c, center, n, e, s, w, nw, ne, se, sw, start, middle, or end.

text fifigures只能用后三个

Arrowhead :

CapStyle

none, simple, triangle, or barbed.

butt, square, or round.

箭头

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 :

各种内置图类型

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

一个点

Point2

x1, y1, x2, y2

2个点

PointList

x1, y1, x2, y2, x3, y3...

点列表

Rectangle

x, y, width, height

矩形，左上角，长宽

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)

 

一个或者多个转换组成的步骤列表

由上面表格的各种类型的属性一起可以定义某个图。不同的图包含的属性不同：

类型：父类

值格式定义

备注

(fifigure) :

 

type=<FigureType>; visible=<bool>; tags=<TagList>; childZ=<int>;transform=<Transform>;

基类

(abstractLine) : fifigure

 

lineColor=<Color>; lineStyle=<LineStyle>; lineWidth=<double>;

lineOpacity=<double>; capStyle=<CapStyle>; startArrowhead=<Arrowhead>;

endArrowhead=<Arrowhead>; zoomLineWidth=<bool>;

抽象类

line : abstractLine

points=<Point2>

直线

arc : abstractLine

bounds=<Rectangle> pos=<Point>; size=<Dimensions>; anchor=<Anchor>;

startAngle=<degrees>; endAngle=<degrees>

弧线

polyline : abstractLine

points=<PointList>; smooth=<bool>; joinstyle=<JoinStyle>

折线

(abstractShape) : fifigure

 

lineColor=<Color>; fillColor=<Color>; lineStyle=<LineStyle>;

lineWidth=<double>; lineOpacity=<double01>; fillOpacity=<double01>;

zoomLineWidth=<bool>

图形类

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>

 

椭圆

ring : abstractShape

 

bounds=<Rectangle> pos=<Point>; size=<Dimensions>; anchor=<Anchor>;

innerSize=<Dimensions>

 

圆环

pieslice : abstractShape

 

bounds=<Rectangle> pos=<Point>; size=<Dimensions>; anchor=<Anchor>;

startAngle=<degrees>; endAngle=<degrees>

 

饼图部分

polygon : abstractShape

 

points=<PointList>; smooth=<bool>; joinStyle=<JoinStyle>; fillRule=<FillRule>

 

多边形

path : abstractShape

 

path=<string>; offset=<Point>; joinStyle=<JoinStyle>; capStyle=<CapStyle>;

fillRule=<FillRule>

路径

(abstractText) : figure

 

pos=<Point>; anchor=<Anchor> text=<string>; font=<Font>; opacity=<double01>;

color=<Color>;

 

抽象文字

label : abstractText

 

angle=<degrees>;

 

标签

text : abstractText

 

 

文本框

(abstractImage) : figure

 

bounds=<Rectangle> pos=<Point>; size=<Dimensions>; anchor=<Anchor>;

interpolation=<Interpolation>; opacity=<double01>; tint=<Tint>

 

抽象图片

image : abstractImage

image=<ImageName>

 

图像

icon : abstractImage

image=<ImageName>

图标

pixmap : abstractImage

resolution=<Dimensions>

位图