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New WINDEV, WEBDEV, WINDEV Mobile 24 feature!
  • Coordinates
  • Drawing with opacity or anti-aliasing
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Stored procedures
Draws a polygon in an Image control.
Example
// Draw a 4-side polygon whose
// background is light yellow and whose border is light blue
IMG_Dessin.DrawPolygon(4, 10, 20, 20, 50, 40, 60, 50, 10, LightYellow, LightBlue)
Syntax

Building a polygon point by point Hide the details

<Image control>.DrawPolygon(<Number of sides> , <X1> , <Y1> , <X2> , <Y2> [, <X3> , <Y3> [... [, <Xn> , <Yn>]]] [, <Background color> [, <Side color>]])
<Image control>: Control name
Name of Image control to use.
<Number of sides>: Integer
Number of sides in the polygon (up to 23 sides). This parameter defines the number of <X>, <Y> pairs to specify in the function.
<X1>: Integer
X coordinate of first point of the polygon. These coordinates are expressed in pixels.
<Y1>: Integer
Y coordinate of first point of the polygon. These coordinates are expressed in pixels.
<X2>: Integer
X coordinate of second point of the polygon. These coordinates are expressed in pixels.
<Y2>: Integer
Y coordinate of second point of the polygon. These coordinates are expressed in pixels.
<X3>: Integer
X coordinate of 3rd point of the polygon. These coordinates are expressed in pixels.
<Y3>: Integer
Y coordinate of 3rd point of the polygon. These coordinates are expressed in pixels.
<Xn>: Optional integer
X coordinate of nth point of the polygon. These coordinates are expressed in pixels.
<Yn>: Optional integer
Y coordinate of nth point of the polygon. These coordinates are expressed in pixels.
<Background color>: Integer or constant (optional)
Background color of polygon. This color can correspond to:
If this parameter is not specified, the background color:
<Side color>: Integer or constant (optional)
Color of polygon sides. This color can correspond to:
If this parameter is not specified, the line color:
  • corresponds to the color specified during the last call to <Image>.Pen,
  • is identical to the color used for the background if <Image>.Pen was not used.

Building a polygon via an array of X and Y coordinates Hide the details

<Image control>.DrawPolygon(<Array of coordinates> [, <Background color> [, <Side color>]])
<Image control>: Control name
Name of Image control to use.
<Array of coordinates>: Array of integers or array of points
  • WLanguage array of integers containing the coordinates of polygon points. The even subscript represent the X coordinates while the odd subscripts represent the Y coordinates of points. These coordinates are expressed in pixels.
  • Versions 22 and later
    WINDEVWEBDEV - Server codeiPhone/iPadWindows MobileUniversal Windows 10 App WLanguage array of Point variables containing the coordinates of polygon points. These coordinates are expressed in pixels.
    New in version 22
    WINDEVWEBDEV - Server codeiPhone/iPadWindows MobileUniversal Windows 10 App WLanguage array of Point variables containing the coordinates of polygon points. These coordinates are expressed in pixels.
    WINDEVWEBDEV - Server codeiPhone/iPadWindows MobileUniversal Windows 10 App WLanguage array of Point variables containing the coordinates of polygon points. These coordinates are expressed in pixels.
    WINDEVWEBDEV - Server codeiPhone/iPadWindows MobileUniversal Windows 10 App WLanguage array of Point variables containing the coordinates of polygon points. These coordinates are expressed in pixels.
<Background color>: Integer or constant (optional)
Background color of polygon. This color can correspond to:
If this parameter is not specified, the background color:
<Side color>: Integer or constant (optional)
Color of polygon sides. This color can correspond to:If this parameter is not specified, the line color:
  • corresponds to the color specified in the last call to <Image>.Pen,
  • is identical to the background color if <Image>.Pen was not used.
Remarks

Coordinates

Drawing a polygon:
IMG_Drawing.DrawPolygon(5, 80, 10, 10, 150, 100, 200, 160, 80, 140, 40)
Drawing a polygon
The coordinates are specified in relation to the top left corner of the Image control (coordinates set to (0,0)).
Important: There is no need to close the polygon (the coordinates of last point do not have to be equal to the coordinates of first point). The polygon is automatically "closed".
Limits: a polygon can contain up to 100 000 points in WINDEV, WEBDEV and Java, and up to 1000 points in Windows CE.
WINDEVWEBDEV - Server codeReports and QueriesWindowsAjaxUser code (UMC)

Drawing with opacity or anti-aliasing

For an image with opacity (<Image>.StartDrawing with the constant dWithOpacity) or anti-aliasing (<Image>.ChangeMode with the constant drawAntiAliasing), the outline is drawn over the inside of the polygon: therefore, the line is partly combined with the inside of polygon. If the line is very thick, it will be displayed in two colors.
Related Examples:
The drawing functions Unit examples (WINDEV): The drawing functions
[ + ] Using the main drawing functions of WINDEV to:
- Initialize an Image control for drawing
- Draw simple shapes
- Write a text into a drawing
- Change the color in a drawing
Component : wd240pnt.dll
Minimum version required
  • Version 24
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