/* Compute the revolutions per minute of a gear.
*/
static void
compute_rpm (ModeInfo *mi, gear *g)
{
double fps, rpf, rps;
fps = (MI_PAUSE(mi) == 0 ? 999999 : 1000000.0 / MI_PAUSE(mi));
if (fps > 150) fps = 150; /* let's be reasonable... */
if (fps < 10) fps = 10;
rpf = (g->ratio * spin_speed) / 360.0; /* rotations per frame */
rps = rpf * fps; /* rotations per second */
g->rpm = rps * 60;
}
ENTRYPOINT void
draw_triangle (ModeInfo * mi)
{
trianglestruct *tp = &triangles[MI_SCREEN(mi)];
int d, d2, i, j, delta;
if (!tp->init_now) {
draw_mesh(mi, tp, tp->d / 2, MAX_SIZE / tp->d);
/* The init_now flag will pop up when the scene is complete.
* Cycles specifies how long to wait, in 1/10 secs.
TODO: This is wrong for multi-screens ***
*/
if (tp->init_now) {
#ifndef STANDALONE
MI_PAUSE(mi) = 2000000;
#else
if (tp->stage == -1)
{
XClearWindow(MI_DISPLAY(mi), MI_WINDOW(mi));
if (!mono_p)
{
free_colors(mi->xgwa.screen, mi->xgwa.colormap, mi->colors,
mi->npixels);
mi->npixels =
get_integer_resource (mi->dpy, "ncolors", "Integer");
make_smooth_colormap (mi->xgwa.screen,
mi->xgwa.visual, mi->xgwa.colormap,
mi->colors, &mi->npixels,
True, &mi->writable_p, True);
}
}
#endif
}
return;
}
if (tp->delta[0] > 0) {
if (!(++tp->stage)) {
tp->h[0][0] = (short int) MAX(0, DISPLACE(0, tp->delta[0]));
tp->h[tp->size][0] = (short int) MAX(0, DISPLACE(0, tp->delta[0]));
tp->h[0][tp->size] = (short int) MAX(0, DISPLACE(0, tp->delta[0]));
} else {
d = 2 << (tp->steps - tp->stage);
d2 = d / 2;
delta = tp->delta[tp->stage - 1];
for (i = 0; i < tp->size; i += d) {
for (j = 0; j < (tp->size - i); j += d) {
tp->h[i + d2][j] = (short int) DISPLACE(tp->h[i][j] +
tp->h[i + d][j], delta);
tp->h[i][j + d2] = (short int) DISPLACE(tp->h[i][j] +
tp->h[i][j + d], delta);
tp->h[i + d2][j + d2] = (short int) DISPLACE(tp->h[i + d][j] +
tp->h[i][j + d], delta);
}
tp->init_now = 0;
tp->i = 0;
tp->j = 0;
tp->d = d;
}
}
}
if (tp->stage == tp->steps) {
tp->stage = -1;
}
}
