int Text_width(char *text)
{
double top, bottom, left, right;
R_get_text_box(text, &top, &bottom, &left, &right);
if (right > left)
return right - left + 1;
else
return left - right + 1;
}
int draw_slice(struct Colors *colors, int fill_flag, DCELL fill_color1, DCELL fill_color2, int txt_color, double cx, double cy, double r, /* in normalized coords. */
double a1, double a2 /* in degrees */
)
{
int tt, tb, tr, tl;
int height, width;
int yoffset, xoffset;
int x[1000], y[1000];
int lx, ly;
int i = 1;
char txt[512];
double arc, arc_incr = 0.01;
DCELL fill_color;
D_get_screen_window(&tt, &tb, &tl, &tr);
height = tb - tt;
width = tr - tl;
yoffset = tb;
xoffset = tl;
while (a2 / arc_incr > 998)
arc_incr *= 2;
x[0] = (int)((double)xoffset + cx * (double)width);
y[0] = (int)((double)yoffset - cy * (double)height);
arc = a1;
if (fill_flag && fill_color1 != fill_color2) {
i = 1;
while (arc <= (a1 + a2)) {
fill_color = fill_color1 + (arc - a1) *
(fill_color2 - fill_color1) / a2;
x[i] = x[0] + r * (width) * cos(arc / 57.296);
y[i] = y[0] - r * (height) * sin(arc / 57.296);
if (i == 2) {
D_d_color(fill_color, colors);
R_polygon_abs(x + i - 2, y + i - 2, 3);
x[i - 1] = x[i];
y[i - 1] = y[i];
}
else
i++;
arc = arc + arc_incr;
}
}
else {
i = 1;
while (arc <= (a1 + a2)) {
x[i] = x[0] + r * (width) * cos(arc / 57.296);
y[i] = y[0] - r * (height) * sin(arc / 57.296);
i++;
arc = arc + arc_incr;
}
if (!fill_flag) {
R_standard_color(txt_color);
R_polyline_abs(x, y, i);
}
else {
D_d_color(fill_color1, colors);
R_polygon_abs(x, y, i);
}
}
if (a2 > 15.0) {
/* draw a label */
arc = a1 + a2 / 2;
sprintf(txt, "%2.0f%s", (double)(a2 / (double)360.0) * (double)100.0,
percent);
R_get_text_box(txt, &tt, &tb, &tl, &tr);
lx = x[0] + (r + 0.03) * (width) * cos(arc / 57.296) - (tr - tl) / 2;
ly = y[0] - (r + 0.03) * (height) * sin(arc / 57.296) + (tb - tt) / 2;
R_move_abs(lx, ly);
R_standard_color(txt_color);
R_text(txt);
}
return 0;
}