SurfaceChart.addSurfaceLine

void addSurfaceLine(double x1, double y1, double x2, double y2, int color, int lineWidth = 1, int side = 0);

Adds a line segment to the surface.

Argument	Default	Description
x1	(Mandatory)	The x data coordinate of the first end-point of the line.
y1	(Mandatory)	The y data coordinate of the first end-point of the line.
x2	(Mandatory)	The x data coordinate of the second end-point of the line.
y2	(Mandatory)	The y data coordinate of the second end-point of the line.
color	(Mandatory)	The color of the line.
lineWidth	1	The line width (thickness).
side	0	A value of 1 means the line is drawn on the front side of the surface. A value of -1 means the line is drawn on the back side of the surface. The default value of 0 means the line is drawn on both sides of the surface.

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