BaseCameraLine3DTo2D(Point3D, Point3D, Point, Point) Method

public bool Line3DTo2D(
	Point3D startPositionWorld,
	Point3D endPositionWorld,
	out Point startPositionScreen,
	out Point endPositionScreen
)

Parameters

startPositionWorld  Point3D

start position of the 3D line

endPositionWorld  Point3D

end position of the 3D line

startPositionScreen  Point

start position of the 2D line on the screen

endPositionScreen  Point

end position of the 2D line on the screen

Return Value

Converts a 3D line that is defined by startPositionWorld and endPositionWorld to a line on the screen that is defined by startPositionScreen and endPositionScreen.

This method correctly handles the case when the 3D line crosses the camera near plane (goes behind the camera). In this case the line needs to be cropped at the camera near plane.

The matrix to convert 3D point to 2D point is calculated from the used Ab3d.Camera. The matrix value is cached and is only recalculated when the camera is changed.

If the matrix to convert 3D point to 2D point cannot be calculated (for example if TargetViewport3D is not set), the calculated points will be Point(double.NaN, double.NaN) and the method will return false as a result.

To use Line3DTo2D method without attaching the camera to real Viewport3D you can use Line3DTo2D(Point3D, Point3D, Size, Point, Point).

Reference