<Image variable>.DrawPolygon (Función)

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Drawing with opacity or anti-aliasing
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<Image variable>.DrawPolygon (Función)

Draws a polygon in an Image variable.

Caution: In Linux, this function requires a specific configuration. For more details, see Drawing in WINDEV, WEBDEV and WINDEV Mobile.

Ejemplo

MyImage is Image = "Test.gif"
// Draw a 4-side polygon whose 
// background is light yellow and whose border is light blue
MyImage.DrawPolygon(4, 10, 20, 20, 50, 40, 60, 50, 10, LightYellow, LightBlue)
IMG_MyDrawing = MyImage

Sintaxis

Construir un polígono punto por punto Ocultar los detalles

<Image variable>.DrawPolygon(<Number of sides> , <X1> , <Y1> , <X2> , <Y2> [, <X3> , <Y3> [... [, <Xn> , <Yn>]]] [, <Background color> [, <Side color>]])

<Image variable>: Variable de tipo Image

Name of the Image variable to be used.

<Number of sides>: Entero

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>: Entero

X-coordinate of first point of the polygon. These coordinates are expressed in pixels.

<Y1>: Entero

Y-coordinate of first point of the polygon. These coordinates are expressed in pixels.

<X2>: Entero

X-coordinate of second point of the polygon. These coordinates are expressed in pixels.

<Y2>: Entero

Y-coordinate of second point of the polygon. These coordinates are expressed in pixels.

<X3>: Entero

X-coordinate of 3rd point of the polygon. These coordinates are expressed in pixels.

<Y3>: Entero

Y-coordinate of 3rd point of the polygon. These coordinates are expressed in pixels.

<Xn>: Entero opcional

X-coordinate of nth point of the polygon. These coordinates are expressed in pixels.

<Yn>: Entero opcional

Y-coordinate of nth point of the polygon. These coordinates are expressed in pixels.

<Background color>: Entero o constante (opcional)

Polygon background color. This color can correspond to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
a WLanguage preset color.
If this parameter is not specified, the background color:
is Transparent if <Variable Image>.Background has not been used beforehand,
corresponds to the color specified in the last call to <Variable Image>.Background.

<Side color>: Entero o constante (opcional)

Color of polygon sides. This color can correspond to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
a WLanguage preset color.
If this parameter is not specified, the line color:
is Transparent if <Variable Image>.Pen has not been previously used.
For a variable of type Image, the line will be black.
corresponds to the color specified in the last call to <Variable Image>.Pen.

Construir un polígono mediante un array de coordenadas X e Y Ocultar los detalles

<Image variable>.DrawPolygon(<Array of coordinates> [, <Background color> [, <Side color>]])

<Image variable>: Variable de tipo Image

Name of the Image variable to be used.

<Array of coordinates>: Array de enteros o puntos

WLanguage array of integers containing the coordinates of polygon points. The even indexes represent the X-coordinates while the odd indexes represent the Y-coordinates of the points. These coordinates are expressed in pixels.
WLanguage array of Point variables containing the coordinates of the polygon points. These coordinates are expressed in pixels.

<Background color>: Entero o constante (opcional)

Polygon background color. This color can correspond to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
a WLanguage preset color,
a variable of type Color.
If this parameter is not specified, the background color:
is Transparent if <Variable Image>.Background has not been used beforehand,
corresponds to the color specified in the last call to <Variable Image>.Background.

<Side color>: Entero o constante (opcional)

Color of polygon sides. This color can correspond to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
a WLanguage preset color,
a variable of type Color.
If this parameter is not specified, the line color:
is Transparent if <Variable Image>.Pen has not been previously used.
For a variable of type Image, the line will be black.
corresponds to the color specified in the last call to <Variable Image>.Pen.

Construir un polígono a partir de una variable de tipo Polygon Ocultar los detalles

<Image variable>.DrawPolygon(<Polygon> [, <Background color> [, <Side color>]])

<Image variable>: Variable de tipo Image

Name of the Image variable to be used.

<Polygon>: Variable de tipo Polygon

Name of the Polygon variable that describes the different points of the polygon.

<Background color>: Entero o constante (opcional)

Polygon background color. This color can correspond to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
a WLanguage preset color,
a variable of type Color.
If this parameter is not specified, the background color:
is Transparent if <Variable Image>.Background has not been used beforehand,
corresponds to the color specified in the last call to <Variable Image>.Background.

<Side color>: Entero o constante (opcional)

Color of polygon sides. This color can correspond to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
a WLanguage preset color,
a variable of type Color.
If this parameter is not specified, the line color:
is Transparent if <Variable Image>.Pen has not been previously used.
For a variable of type Image, the line will be black.
corresponds to the color specified in the last call to <Variable Image>.Pen.

Observaciones

Coordinates

Drawing a polygon:

MyImage.DrawPolygon(5, 80, 10, 10, 150, 100, 200, 160, 80, 140, 40)

Coordinates are specified with respect to the upper-left corner of the image (coordinates: (0.0)).

Important You don't need to close the polygon (the coordinates of the last point don't have to be equal to the coordinates of the first point). The polygon is automatically "closed".

Limits A polygon can have a maximum of 100,000 points in WINDEV, WEBDEV and Java, and 1,000 points in Windows CE.

Drawing with opacity or anti-aliasing

In the case of drawing with opacity (function <Image variable>.StartDrawing with constant dWithOpacity) or anti-aliasing (function <Image variable>.ChangeMode with constant drawingAntiAliasing), the outline is drawn on top of the polygon interior: the line is therefore partly combined with the polygon interior. If the line is very thick, it will be displayed in two colors.

Clasificación Lógica de negocio / UI: Código neutro

Componente: wd300pnt.dll

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Versión mínima requerida

Versión 24

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Última modificación: 30/05/2025

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