CRdraw_lines: Draws multiple lines.

In lorweiuk/CREx: Run behavioral experiments from R.

Draws multiple lines.

Description

Draws multiple lines defined in line_list to rendering target. Line_list contains vector elements x1, y1, x2, y2, with each set (x1[i], y1[i], x2[i], y2[i]) defining one line. Consecutive lines are connected at the ends, i.e. a line is drawn from (x2[i], y2[i]) to (x1[i+1], y1[i+1]).

Usage

CRdraw_lines(graphics_list, line_list, status = NULL)

Arguments

graphics_list	List containing pointers to window, renderer etc. created with CRopen.
line_list	List defining multiple lines, containing vector elements x1, y1, x2 and y2, with each set of x1[i], x2[i], y1[i] and y2[i] defining a line.
status	Optional list status with elements value and message to retrieve warnings and error messages.

Examples

    CRset_render_color(gs, list(r = 0, g = 0, b = 0))
    
    CRrender_clear(gs)
    
    CRset_render_color(gs, list(r = 100, g = 0, b = 0))
    
    lines <- list(x1 = c(50, 50, 50, 100),
                  y1 = c(50, 100, 100, 50),
                  x2 = c(100, 50, 100, 50),
                  y2 = c(100, 100, 50, 50))
    
    CRdraw_lines(gs, lines)
    
    CRrender_present(gs)

lorweiuk/CREx documentation built on March 16, 2024, 3:04 a.m.