Geografic-Information-System/imagery/i.points/points.c

#include "globals.h"
#include "local_proto.h"
#include <grass/display.h>

int display_points(int in_color)
{
    display_points_in_view(VIEW_MAP1, in_color,
			   group.points.e1, group.points.n1,
			   group.points.status, group.points.count);

    display_points_in_view(VIEW_MAP1_ZOOM, in_color,
			   group.points.e1, group.points.n1,
			   group.points.status, group.points.count);

    display_points_in_view(VIEW_MAP2, in_color,
			   group.points.e2, group.points.n2,
			   group.points.status, group.points.count);

    display_points_in_view(VIEW_MAP2_ZOOM, in_color,
			   group.points.e2, group.points.n2,
			   group.points.status, group.points.count);

    return 0;
}

int display_points_in_view(View * view, int in_color,
			   double *east, double *north, int *status,
			   int count)
{
    if (!view->cell.configured)
	return 1;
    while (count-- > 0) {
	if (in_color && (*status > 0))
	    R_standard_color(GREEN);
	else if (in_color && (*status == 0))
	    R_standard_color(RED);
	else
	    R_standard_color(GREY);
	status++;
	display_one_point(view, *east++, *north++);
    }

    return 0;
}

int display_one_point(View * view, double east, double north)
{
    int row, col, x, y;

    row = northing_to_row(&view->cell.head, north) + .5;
    col = easting_to_col(&view->cell.head, east) + .5;
    y = row_to_view(view, row);
    x = col_to_view(view, col);
    if (In_view(view, x, y))
	dot(x, y);

    return 0;
}