Table of Contents
ITGIS_Shape.PrepareContourInternal method
DK for ActiveX | TatukGIS_XDK11.ITGIS_Shape.PrepareContourInternal | Methods | Properties
Prepares a rasterized contour bitmap for internal polygon topology operations by converting vector geometry to a pixel grid.
Syntax
// C# public void PrepareContourInternal( int _size, WordBool _outline, ref ITGIS_Pixels _pixels, ref double _scale, ref ITPoint _offset );
' VisualBasic Public Sub PrepareContourInternal( ByVal _size As Integer, ByVal _outline As WordBool, ByRef _pixels As ITGIS_Pixels, ByRef _scale As Double, ByRef _offset As ITPoint )
// Oxygene public procedure PrepareContourInternal( _size : Integer; _outline : WordBool; var _pixels : ITGIS_Pixels; var _scale : Double; var _offset : ITPoint );
Parameters
| Name | Type | Description |
|---|---|---|
| _size | int Integer | Bitmap width and height in pixels that determine rasterization resolution. |
| _outline | WordBool | If True, rasterize only polygon boundaries; if False, rasterize the polygon interior. |
| _pixels | ITGIS_Pixels | Output newly allocated pixel buffer containing the rasterized contour image. |
| _scale | double Double | Output conversion factor from shape units to pixel units. |
| _offset | ITPoint | Output pixel-space offset applied during rasterization. |
Remarks
PURPOSE: Supports internal topology and coverage analysis by converting vector shape geometry to a raster representation that can be tested efficiently.
BEHAVIOR: Renders the shape to a square bitmap, optionally as outline-only or filled interior, and returns the pixel buffer together with scale and offset values needed for coordinate mapping.
CONSTRAINTS: Internal-use helper. Larger bitmap sizes increase precision but also increase memory use. The caller is responsible for releasing the allocated pixel buffer.