private IGeometry RotateLine(IGeometry geom, double newAngle, double oldAngle, bool isLine = true)
{
IPoint centerPoint;
IElement elem;
if (isLine)
{
IPointCollection ptCol = geom as IPointCollection;
centerPoint = ptCol.get_Point(0);
elem = new LineElement();
}
else
{
centerPoint = new PointClass
{
X = (geom.Envelope.LowerLeft.X + geom.Envelope.LowerRight.X) / 2,
Y = (geom.Envelope.LowerLeft.Y + geom.Envelope.UpperRight.Y) / 2
};
elem = new PolygonElement();
}
elem.Geometry = geom;
ITransform2D trans = elem as ITransform2D;
double angle = newAngle - oldAngle;
if ((newAngle - oldAngle) > Math.PI / 2)
{
angle += Math.PI;
}
if ((newAngle - oldAngle) < -1 * Math.PI / 2)
{
angle -= Math.PI;
}
trans.Rotate(centerPoint, angle);
return elem.Geometry;
}
private IGeometry MoveGeom(IGeometry geom, double dx, double dy)
{
IElement elem = new PolygonElement();
elem.Geometry = geom;
ITransform2D trans = elem as ITransform2D;
trans.Move(dx, dy);
return elem.Geometry;
}
public static IElement drawPolygonByScore(IGeometry geom, double score, AxMapControl mapControl)
{
ISimpleFillSymbol fSym = new SimpleFillSymbolClass();
ILineSymbol lSym = new SimpleLineSymbolClass();
IRgbColor color = new RgbColorClass();
if (score == 0)
{
color.Red = 255;
color.Green = 255;
color.Blue = 255;
}
else if (score > 0 && score <= 0.3)
{
color.Blue = 255;
color.Red = 0;
color.Green = 0;
}
else if (score > 0.3 && score <= 0.6)
{
color.Green = 255;
color.Red = 0;
color.Blue = 0;
}
else
{
color.Red = 255;
color.Green = 0;
color.Blue = 0;
}
fSym.Color = color;
color.Red = 255;
color.Green = 255;
color.Blue = 255;
lSym.Color = color;
fSym.Outline = lSym;
fSym.Style = esriSimpleFillStyle.esriSFSSolid;
PolygonElement pFillElement = new PolygonElement();
pFillElement.Symbol = fSym;
pFillElement.Opacity = 50;
IElement pEle = pFillElement as IElement;
pEle.Geometry = geom;
IGraphicsContainer pGraphics = mapControl.Map as IGraphicsContainer;
IActiveView pActiveView = mapControl.ActiveView;
pGraphics.AddElement(pEle, 0);
pActiveView.Refresh();
return pEle;
}