Description
I am trying to learn Cimg. I am playing with the drawing functions and I want to draw a line. the functoon declaration is very simple:
CImg& draw_line ( const int x0,
const int y0,
const int x1,
const int y1,
const tc *const color,
const float opacity = 1,
const unsigned int pattern = ~0U,
const bool init_hatch = true
)
where
x0 X-coordinate of the starting line point.
y0 Y-coordinate of the starting line point.
x1 X-coordinate of the ending line point.
y1 Y-coordinate of the ending line point.
color Pointer to spectrum() consecutive values of type T, defining the drawing color.
opacity Drawing opacity.
pattern An integer whose bits describe the line pattern.
init_hatch Tells if a reinitialization of the hash state must be done.
My question is with pattern, I haven't been able to find in the documentation which integers represent which kind of lines. Does anyone now how to manipulate the pattern?
Thank you in advance