static void
draw_ticks (struct state *st, Drawable d, struct disc *disc,
int x, int y, int radius)
{
XSegment segs[72];
int i;
double tick = (M_PI * 2) / 72;
for (i = 0; i < 72; i++)
{
int radius2 = radius;
double th = (i * tick) + (2 * M_PI * (disc->theta / ((double) 360*64)));
if (i % 6)
radius2 -= radius / 16;
else
radius2 -= radius / 8;
segs[i].x1 = x + radius * cos(th);
segs[i].y1 = y + radius * sin(th);
segs[i].x2 = x + radius2 * cos(th);
segs[i].y2 = y + radius2 * sin(th);
}
XDrawSegments (st->dpy, d, disc->gc, segs, countof(segs));
draw_letters (st, d, disc, x, y, radius);
}
void
draw_logo(float scale)
{
/* Draws the unofficial OpenGL logo using GLC, the OpenGL */
/* character rendering library. */
static GLboolean have_dlist = GL_FALSE;
static GLuint dlist;
access_font();
if (have_dlist == GL_FALSE) {
/* Compile the graphics into a display list. */
dlist = glGenLists(1);
if (!glIsList(dlist)) {
fprintf(stderr, "glGenLists() failed.\n");
}
else {
glNewList(dlist, GL_COMPILE); {
draw_letters(scale);
} glEndList();
have_dlist = GL_TRUE;
}
}
/* Draw everything by calling the display list. */
if (glIsList(dlist)) {
glCallList(dlist);
}
}
