How to draw a circle in the secondary development of TE
This article will explain in detail how to draw a circle in the secondary development of TE. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.
In the secondary development of TE, it is sometimes used to draw a circle to mark a range, and the radius of the circle varies according to mouse movement, which is the same as directly using TE to draw a circle.
This requires defining events such as mouse clicks in the re-development of te. The following is the detailed description code.
/ / define the left mouse button event
Sgworld.OnLButtonUp + = sgworld_OnLButtonUp
/ / define the right mouse button event
Sgworld.OnRButtonUp + = sgworld_OnRButtonUp
/ / define real-time monitoring events
Sgworld.OnFrame + = sgworld_OnFrame
Bool sgworld_OnLButtonUp (int Flags, int X, int Y)
{
If (icircle = = null)
{
/ / if the object is empty, draw a circle where the mouse clicks for the first time
/ / obtain the coordinates of the mouse click location
Iworldpoint = this.sgworld.Window.PixelToWorld (X, Y, WorldPointType.WPT_TERRAIN)
Iposition = iworldpoint.Position
Iposition.AltitudeType = AltitudeTypeCode.ATC_ON_TERRAIN
/ / create a circle
Icircle = sgworld.Creator.CreateCircle (iposition, x, "", sgworld.Creator.CreateColor (fillcolor.R, fillcolor.G, fillcolor.B, fillcolor.A), groupid, "Circle")
Icircle.NumberOfSegments = 25
Return true
}
Else
{
/ / after the circle has been drawn, the radius of the circle is calculated according to the current position of the mouse
Iworldpoint2 = this.sgworld.Window.PixelToWorld (X, Y, WorldPointType.WPT_TERRAIN)
/ / data the location of the mouse and calculate the distance
X = sgworld.CoordServices.GetDistance (iworldpoint.Position.X, iworldpoint.Position.Y, iworldpoint2.Position.X, iworldpoint2.Position.Y)
Icircle.Radius = x
Icircle = null
Return true
}
Return false
}
/ / Real-time monitoring events
Void sgworld_OnFrame ()
{
/ / judge if the circle object is not empty
If (icirclearship null)
{
/ / get the mouse information
Moseinfo = this.sgworld.Window.GetMouseInfo ()
Iworldpoint2 = this.sgworld.Window.PixelToWorld (moseinfo.X,moseinfo.Y,WorldPointType.WPT_TERRAIN)
/ / calculate the distance
X = sgworld.CoordServices.GetDistance (iworldpoint.Position.X, iworldpoint.Position.Y, iworldpoint2.Position.X, iworldpoint2.Position.Y)
Icircle.Radius = x
}
}
/ / right mouse button event
Bool sgworld_OnRButtonUp (int Flags, int X, int Y)
{
/ / some commonly used end events
Return false
}
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